./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi001_power.oepc_pso.oepc_rmo.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/rfi001_power.oepc_pso.oepc_rmo.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/rfi001_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi001_power.oepc_pso.oepc_rmo.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 19:12:55,540 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:12:55,604 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:12:55,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:12:55,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:12:55,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:12:55,620 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:12:55,620 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:12:55,621 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:12:55,621 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:12:55,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:12:55,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:12:55,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:12:55,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:12:55,623 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:12:55,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:12:55,623 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:12:55,623 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:12:55,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:12:55,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:12:55,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:12:55,624 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:12:55,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:12:55,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:12:55,625 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:12:55,625 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:12:55,625 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:12:55,625 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:12:55,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:12:55,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:12:55,626 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:12:55,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:12:55,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:12:55,627 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:12:55,627 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:12:55,627 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:12:55,627 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:12:55,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:12:55,627 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:12:55,628 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:12:55,628 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:12:55,634 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:12:55,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:12:55,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:12:55,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:12:55,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:12:55,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:12:55,849 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:12:55,849 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:12:55,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi001_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 19:12:56,828 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:12:57,010 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:12:57,010 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi001_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 19:12:57,022 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96cd50a45/cde78eba19094231bffdc5b20909e537/FLAG3af2031aa [2024-06-21 19:12:57,032 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96cd50a45/cde78eba19094231bffdc5b20909e537 [2024-06-21 19:12:57,034 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:12:57,036 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:12:57,037 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi001_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 19:12:57,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:12:57,131 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:12:57,133 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:12:57,133 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:12:57,136 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:12:57,137 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:12:57" (1/2) ... [2024-06-21 19:12:57,138 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f2612c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:12:57, skipping insertion in model container [2024-06-21 19:12:57,138 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:12:57" (1/2) ... [2024-06-21 19:12:57,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a11bc80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:12:57, skipping insertion in model container [2024-06-21 19:12:57,140 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:12:57" (2/2) ... [2024-06-21 19:12:57,141 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f2612c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:12:57, skipping insertion in model container [2024-06-21 19:12:57,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:12:57" (2/2) ... [2024-06-21 19:12:57,142 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:12:57,180 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:12:57,181 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )x$flush_delayed) + (long long )x$r_buff0_thd1 >= 0LL) && (0LL - (long long )x$flush_delayed) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$flush_delayed) + (long long )x$w_buff0_used >= 0LL) && (0LL - (long long )x$r_buff0_thd0) + (long long )x$r_buff0_thd1 >= 0LL) && (0LL - (long long )x$r_buff0_thd0) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd0) + (long long )x$w_buff0_used >= 0LL) && (0LL - (long long )x$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_buff0_thd2) + (long long )x$w_buff0_used >= 0LL) && (0LL - (long long )x$r_buff1_thd0) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd0) + (long long )x$w_buff0_used >= 0LL) && (0LL - (long long )x$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$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0_used >= 0LL) && (0LL - (long long )x$read_delayed) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$read_delayed) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x$r_buff0_thd1) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x$w_buff0) + (long long )x$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )x$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )x$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )x$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )x$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )x$w_buff0_used >= 0LL) && (long long )x + (long long )x$r_buff0_thd1 >= 0LL) && (long long )x + (long long )x$w_buff0 >= 0LL) && (long long )x + (long long )x$w_buff0_used >= 0LL) && (long long )x$flush_delayed + (long long )x$r_buff0_thd1 >= 0LL) && (long long )x$flush_delayed + (long long )x$w_buff0 >= 0LL) && (long long )x$flush_delayed + (long long )x$w_buff0_used >= 0LL) && (long long )x$mem_tmp + (long long )x$r_buff0_thd1 >= 0LL) && (long long )x$mem_tmp + (long long )x$w_buff0 >= 0LL) && (long long )x$mem_tmp + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd0 + (long long )x$r_buff0_thd1 >= 0LL) && (long long )x$r_buff0_thd0 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd0 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$r_buff0_thd2 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$r_buff1_thd0 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$r_buff1_thd1 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$read_delayed >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff0_thd1 + (long long )y >= 0LL) && (long long )x$r_buff0_thd1 + (long long )z >= 0LL) && (long long )x$r_buff0_thd2 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff1_thd0 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd0 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff1_thd1 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd1 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff1_thd2 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd2 + (long long )x$w_buff0_used >= 0LL) && (long long )x$read_delayed + (long long )x$w_buff0 >= 0LL) && (long long )x$read_delayed + (long long )x$w_buff0_used >= 0LL) && (long long )x$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_buff0 + (long long )y >= 0LL) && (long long )x$w_buff0 + (long long )z >= 0LL) && (long long )x$w_buff0_used + (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0_used + (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used + (long long )y >= 0LL) && (long long )x$w_buff0_used + (long long )z >= 0LL) && (long long )weak$$choice0 + (long long )x$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )x$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )x$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )x$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )x$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )x$w_buff0_used >= 0LL) && (1LL + (long long )x$w_buff0_used) - (long long )x$w_buff1 >= 0LL) && (long long )__unbuffered_p1_EBX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff0_thd2 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff1_thd0 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff1_thd1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$read_delayed >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$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_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:12:57,181 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )x$flush_delayed) + (long long )x$r_buff0_thd1 >= 0LL) && (0LL - (long long )x$flush_delayed) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$flush_delayed) + (long long )x$w_buff0_used >= 0LL) && (0LL - (long long )x$r_buff0_thd0) + (long long )x$r_buff0_thd1 >= 0LL) && (0LL - (long long )x$r_buff0_thd0) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd0) + (long long )x$w_buff0_used >= 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$r_buff0_thd2) + (long long )x$w_buff0_used >= 0LL) && (0LL - (long long )x$r_buff1_thd0) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd0) + (long long )x$w_buff0_used >= 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$r_buff1_thd2) + (long long )x$w_buff0_used >= 0LL) && (0LL - (long long )x$read_delayed) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$read_delayed) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x$r_buff0_thd1) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )x$w_buff0) + (long long )x$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )x$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )x$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )x$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )x$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )x$w_buff0_used >= 0LL) && (long long )x + (long long )x$r_buff0_thd1 >= 0LL) && (long long )x + (long long )x$w_buff0 >= 0LL) && (long long )x + (long long )x$w_buff0_used >= 0LL) && (long long )x$flush_delayed + (long long )x$r_buff0_thd1 >= 0LL) && (long long )x$flush_delayed + (long long )x$w_buff0 >= 0LL) && (long long )x$flush_delayed + (long long )x$w_buff0_used >= 0LL) && (long long )x$mem_tmp + (long long )x$r_buff0_thd1 >= 0LL) && (long long )x$mem_tmp + (long long )x$w_buff0 >= 0LL) && (long long )x$mem_tmp + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd0 + (long long )x$r_buff0_thd1 >= 0LL) && (long long )x$r_buff0_thd0 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd0 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$r_buff0_thd2 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$r_buff1_thd0 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$r_buff1_thd1 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$read_delayed >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd1 + (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff0_thd1 + (long long )y >= 0LL) && (long long )x$r_buff0_thd1 + (long long )z >= 0LL) && (long long )x$r_buff0_thd2 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff1_thd0 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd0 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff1_thd1 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd1 + (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff1_thd2 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd2 + (long long )x$w_buff0_used >= 0LL) && (long long )x$read_delayed + (long long )x$w_buff0 >= 0LL) && (long long )x$read_delayed + (long long )x$w_buff0_used >= 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$w_buff0 + (long long )y >= 0LL) && (long long )x$w_buff0 + (long long )z >= 0LL) && (long long )x$w_buff0_used + (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0_used + (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0_used + (long long )y >= 0LL) && (long long )x$w_buff0_used + (long long )z >= 0LL) && (long long )weak$$choice0 + (long long )x$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )x$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )x$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )x$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )x$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )x$w_buff0_used >= 0LL) && (1LL + (long long )x$w_buff0_used) - (long long )x$w_buff1 >= 0LL) && (long long )__unbuffered_p1_EBX - (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff0_thd2 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff1_thd0 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff1_thd1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$read_delayed >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff0_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1 >= 0LL) && (long long )x$r_buff1_thd1 - (long long )x$w_buff1_used >= 0LL) && (long long )x$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_buff0_used - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:12:57,181 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:12:57,182 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-21 19:12:57,229 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:12:57,534 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:12:57,554 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:12:57,692 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:12:57,730 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:12:57,731 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:12:57 WrapperNode [2024-06-21 19:12:57,731 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:12:57,732 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:12:57,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:12:57,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:12:57,737 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,763 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,797 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 114 [2024-06-21 19:12:57,797 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:12:57,798 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:12:57,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:12:57,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:12:57,810 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,823 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,827 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,844 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 19:12:57,844 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,845 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,867 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,868 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,871 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,873 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,886 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:12:57,887 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:12:57,887 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:12:57,887 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:12:57,888 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 07:12:57" (1/1) ... [2024-06-21 19:12:57,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:12:57,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:12:57,915 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 19:12:57,934 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 19:12:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:12:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:12:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:12:57,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:12:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:12:57,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:12:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:12:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:12:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:12:57,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:12:57,947 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 19:12:58,061 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:12:58,063 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:12:58,394 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:12:58,394 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:12:58,527 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:12:58,527 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:12:58,529 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:12:58 BoogieIcfgContainer [2024-06-21 19:12:58,530 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:12:58,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:12:58,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:12:58,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:12:58,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:12:57" (1/4) ... [2024-06-21 19:12:58,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1008b0cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:12:58, skipping insertion in model container [2024-06-21 19:12:58,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:12:57" (2/4) ... [2024-06-21 19:12:58,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1008b0cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:12:58, skipping insertion in model container [2024-06-21 19:12:58,552 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 07:12:57" (3/4) ... [2024-06-21 19:12:58,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1008b0cc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:12:58, skipping insertion in model container [2024-06-21 19:12:58,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:12:58" (4/4) ... [2024-06-21 19:12:58,554 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi001_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 19:12:58,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:12:58,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 19:12:58,567 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:12:58,603 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:12:58,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 19:12:58,657 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 19:12:58,657 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:12:58,658 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 41 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 19:12:58,658 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 19:12:58,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 19:12:58,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:12:58,678 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;@212fa7ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:12:58,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 19:12:58,681 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:12:58,682 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:12:58,682 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:12:58,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:12:58,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:12:58,683 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 19:12:58,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:12:58,721 INFO L85 PathProgramCache]: Analyzing trace with hash 332828771, now seen corresponding path program 1 times [2024-06-21 19:12:58,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:12:58,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226002756] [2024-06-21 19:12:58,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:12:58,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:12:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:12:59,891 INFO 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 19:12:59,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:12:59,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226002756] [2024-06-21 19:12:59,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226002756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:12:59,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:12:59,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:12:59,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988534444] [2024-06-21 19:12:59,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:12:59,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:12:59,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:12:59,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:12:59,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:12:59,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 19:12:59,971 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 19:12:59,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:12:59,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 19:12:59,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:00,110 INFO L124 PetriNetUnfolderBase]: 189/351 cut-off events. [2024-06-21 19:13:00,111 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 19:13:00,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 351 events. 189/351 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1290 event pairs, 115 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 696. Up to 333 conditions per place. [2024-06-21 19:13:00,116 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 22 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 19:13:00,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 117 flow [2024-06-21 19:13:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:13:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:13:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-06-21 19:13:00,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 19:13:00,128 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 54 transitions. [2024-06-21 19:13:00,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 117 flow [2024-06-21 19:13:00,131 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 19:13:00,132 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 19:13:00,134 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 19:13:00,137 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 19:13:00,137 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 19:13:00,137 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 19:13:00,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:00,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:00,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:13:00,138 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 19:13:00,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:00,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2020889858, now seen corresponding path program 1 times [2024-06-21 19:13:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867136902] [2024-06-21 19:13:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:00,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:13:00,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:00,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867136902] [2024-06-21 19:13:00,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867136902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:00,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:00,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:13:00,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572962751] [2024-06-21 19:13:00,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:00,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:13:00,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:13:00,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:13:00,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 19:13:00,971 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 19:13:00,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:00,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 19:13:00,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:01,077 INFO L124 PetriNetUnfolderBase]: 186/348 cut-off events. [2024-06-21 19:13:01,078 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-06-21 19:13:01,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 348 events. 186/348 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1271 event pairs, 94 based on Foata normal form. 2/342 useless extension candidates. Maximal degree in co-relation 778. Up to 319 conditions per place. [2024-06-21 19:13:01,082 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 26 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 19:13:01,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 159 flow [2024-06-21 19:13:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:13:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:13:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-06-21 19:13:01,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-06-21 19:13:01,086 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 69 transitions. [2024-06-21 19:13:01,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 159 flow [2024-06-21 19:13:01,088 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 19:13:01,090 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 19:13:01,090 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 19:13:01,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 19:13:01,091 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 19:13:01,091 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 19:13:01,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:01,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:01,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:13:01,092 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 19:13:01,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1776923130, now seen corresponding path program 1 times [2024-06-21 19:13:01,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:01,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642790034] [2024-06-21 19:13:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:01,816 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 19:13:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:01,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642790034] [2024-06-21 19:13:01,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642790034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:01,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:01,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:13:01,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896105174] [2024-06-21 19:13:01,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:01,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:13:01,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:13:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:13:01,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 19:13:01,879 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 19:13:01,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:01,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 19:13:01,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:01,982 INFO L124 PetriNetUnfolderBase]: 187/354 cut-off events. [2024-06-21 19:13:01,982 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-06-21 19:13:01,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 354 events. 187/354 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1309 event pairs, 67 based on Foata normal form. 3/355 useless extension candidates. Maximal degree in co-relation 868. Up to 293 conditions per place. [2024-06-21 19:13:01,984 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-21 19:13:01,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 251 flow [2024-06-21 19:13:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:13:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:13:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 19:13:01,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 19:13:01,988 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 90 transitions. [2024-06-21 19:13:01,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 251 flow [2024-06-21 19:13:01,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 242 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:13:01,990 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 162 flow [2024-06-21 19:13:01,990 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=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-06-21 19:13:01,991 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-21 19:13:01,992 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 162 flow [2024-06-21 19:13:01,992 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 19:13:01,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:01,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:01,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:13:01,992 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 19:13:01,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1414893681, now seen corresponding path program 1 times [2024-06-21 19:13:01,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:01,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647920698] [2024-06-21 19:13:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:01,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:02,922 INFO 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 19:13:02,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:02,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647920698] [2024-06-21 19:13:02,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647920698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:02,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:02,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:02,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859463282] [2024-06-21 19:13:02,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:02,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:02,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:03,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:13:03,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:03,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:03,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:13:03,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:03,151 INFO L124 PetriNetUnfolderBase]: 188/356 cut-off events. [2024-06-21 19:13:03,151 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-06-21 19:13:03,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 356 events. 188/356 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1311 event pairs, 46 based on Foata normal form. 3/357 useless extension candidates. Maximal degree in co-relation 1042. Up to 282 conditions per place. [2024-06-21 19:13:03,154 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 38 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2024-06-21 19:13:03,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 338 flow [2024-06-21 19:13:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 19:13:03,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023041474654378 [2024-06-21 19:13:03,156 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 162 flow. Second operand 7 states and 109 transitions. [2024-06-21 19:13:03,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 338 flow [2024-06-21 19:13:03,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 334 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 19:13:03,160 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 216 flow [2024-06-21 19:13:03,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=216, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-06-21 19:13:03,161 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2024-06-21 19:13:03,161 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 216 flow [2024-06-21 19:13:03,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:03,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:03,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:03,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:13:03,162 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 19:13:03,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1773879685, now seen corresponding path program 1 times [2024-06-21 19:13:03,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:03,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158339220] [2024-06-21 19:13:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:04,203 INFO 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 19:13:04,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:04,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158339220] [2024-06-21 19:13:04,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158339220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:04,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:04,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91176780] [2024-06-21 19:13:04,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:04,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:04,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:04,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:04,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:04,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 19:13:04,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 216 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:04,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:04,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 19:13:04,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:04,452 INFO L124 PetriNetUnfolderBase]: 189/359 cut-off events. [2024-06-21 19:13:04,452 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-06-21 19:13:04,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 359 events. 189/359 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1326 event pairs, 24 based on Foata normal form. 6/363 useless extension candidates. Maximal degree in co-relation 1172. Up to 259 conditions per place. [2024-06-21 19:13:04,454 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 38 selfloop transitions, 16 changer transitions 0/58 dead transitions. [2024-06-21 19:13:04,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 384 flow [2024-06-21 19:13:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:04,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 19:13:04,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391705069124424 [2024-06-21 19:13:04,455 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 216 flow. Second operand 7 states and 117 transitions. [2024-06-21 19:13:04,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 384 flow [2024-06-21 19:13:04,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 350 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:04,458 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 217 flow [2024-06-21 19:13:04,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-21 19:13:04,459 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 19:13:04,459 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 217 flow [2024-06-21 19:13:04,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:04,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:04,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:13:04,460 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 19:13:04,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1502486617, now seen corresponding path program 1 times [2024-06-21 19:13:04,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:04,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628948785] [2024-06-21 19:13:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:04,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:05,428 INFO 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 19:13:05,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:05,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628948785] [2024-06-21 19:13:05,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628948785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:05,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:05,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:13:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942241527] [2024-06-21 19:13:05,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:05,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:13:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:13:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:13:05,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:13:05,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:05,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:05,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:13:05,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:05,680 INFO L124 PetriNetUnfolderBase]: 187/355 cut-off events. [2024-06-21 19:13:05,680 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2024-06-21 19:13:05,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 355 events. 187/355 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1302 event pairs, 47 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 1217. Up to 329 conditions per place. [2024-06-21 19:13:05,682 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 33 selfloop transitions, 8 changer transitions 0/44 dead transitions. [2024-06-21 19:13:05,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 323 flow [2024-06-21 19:13:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:13:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:13:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-06-21 19:13:05,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:13:05,683 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 217 flow. Second operand 5 states and 65 transitions. [2024-06-21 19:13:05,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 323 flow [2024-06-21 19:13:05,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 280 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:05,685 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 214 flow [2024-06-21 19:13:05,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-06-21 19:13:05,686 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-06-21 19:13:05,686 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 214 flow [2024-06-21 19:13:05,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:05,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:05,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:05,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:13:05,686 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 19:13:05,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:05,686 INFO L85 PathProgramCache]: Analyzing trace with hash -696182331, now seen corresponding path program 1 times [2024-06-21 19:13:05,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:05,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501436692] [2024-06-21 19:13:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:05,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:06,854 INFO 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 19:13:06,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501436692] [2024-06-21 19:13:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501436692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:06,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:06,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:13:06,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903256849] [2024-06-21 19:13:06,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:06,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:13:06,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:13:06,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:13:06,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:06,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 214 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 19:13:06,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:06,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:06,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:07,273 INFO L124 PetriNetUnfolderBase]: 212/382 cut-off events. [2024-06-21 19:13:07,273 INFO L125 PetriNetUnfolderBase]: For 1030/1030 co-relation queries the response was YES. [2024-06-21 19:13:07,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1334 conditions, 382 events. 212/382 cut-off events. For 1030/1030 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1347 event pairs, 55 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 1309. Up to 368 conditions per place. [2024-06-21 19:13:07,275 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 35 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2024-06-21 19:13:07,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 324 flow [2024-06-21 19:13:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:13:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:13:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-06-21 19:13:07,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 19:13:07,276 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 214 flow. Second operand 6 states and 70 transitions. [2024-06-21 19:13:07,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 324 flow [2024-06-21 19:13:07,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 313 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:13:07,278 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 242 flow [2024-06-21 19:13:07,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-06-21 19:13:07,279 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2024-06-21 19:13:07,279 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 242 flow [2024-06-21 19:13:07,279 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 19:13:07,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:07,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:07,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:13:07,279 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 19:13:07,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash -112536618, now seen corresponding path program 1 times [2024-06-21 19:13:07,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:07,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345678186] [2024-06-21 19:13:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:07,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:08,163 INFO 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 19:13:08,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:08,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345678186] [2024-06-21 19:13:08,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345678186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:08,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:08,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:13:08,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704258682] [2024-06-21 19:13:08,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:08,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:13:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:13:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:13:08,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:08,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 242 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 19:13:08,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:08,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:08,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:08,354 INFO L124 PetriNetUnfolderBase]: 235/423 cut-off events. [2024-06-21 19:13:08,354 INFO L125 PetriNetUnfolderBase]: For 1400/1400 co-relation queries the response was YES. [2024-06-21 19:13:08,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1579 conditions, 423 events. 235/423 cut-off events. For 1400/1400 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1540 event pairs, 60 based on Foata normal form. 2/423 useless extension candidates. Maximal degree in co-relation 1551. Up to 384 conditions per place. [2024-06-21 19:13:08,357 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 42 selfloop transitions, 15 changer transitions 0/59 dead transitions. [2024-06-21 19:13:08,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 449 flow [2024-06-21 19:13:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:13:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:13:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-06-21 19:13:08,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 19:13:08,358 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 242 flow. Second operand 6 states and 76 transitions. [2024-06-21 19:13:08,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 449 flow [2024-06-21 19:13:08,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 59 transitions, 427 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:08,360 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 324 flow [2024-06-21 19:13:08,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-21 19:13:08,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-21 19:13:08,361 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 324 flow [2024-06-21 19:13:08,361 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 19:13:08,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:08,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:08,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:13:08,361 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 19:13:08,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:08,361 INFO L85 PathProgramCache]: Analyzing trace with hash 780651192, now seen corresponding path program 2 times [2024-06-21 19:13:08,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:08,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753440513] [2024-06-21 19:13:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:08,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:09,232 INFO 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 19:13:09,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:09,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753440513] [2024-06-21 19:13:09,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753440513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:09,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:09,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:13:09,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737756231] [2024-06-21 19:13:09,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:09,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:13:09,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:13:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:13:09,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:09,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 324 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 19:13:09,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:09,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:09,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:09,441 INFO L124 PetriNetUnfolderBase]: 232/418 cut-off events. [2024-06-21 19:13:09,442 INFO L125 PetriNetUnfolderBase]: For 1685/1685 co-relation queries the response was YES. [2024-06-21 19:13:09,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 418 events. 232/418 cut-off events. For 1685/1685 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1517 event pairs, 59 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 1631. Up to 402 conditions per place. [2024-06-21 19:13:09,444 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 44 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2024-06-21 19:13:09,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 56 transitions, 454 flow [2024-06-21 19:13:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:13:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:13:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-06-21 19:13:09,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 19:13:09,445 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 324 flow. Second operand 6 states and 70 transitions. [2024-06-21 19:13:09,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 56 transitions, 454 flow [2024-06-21 19:13:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 443 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:13:09,448 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 350 flow [2024-06-21 19:13:09,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 19:13:09,448 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2024-06-21 19:13:09,449 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 350 flow [2024-06-21 19:13:09,449 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 19:13:09,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:09,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:09,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:13:09,449 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 19:13:09,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:09,449 INFO L85 PathProgramCache]: Analyzing trace with hash -734173414, now seen corresponding path program 3 times [2024-06-21 19:13:09,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:09,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163593538] [2024-06-21 19:13:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:09,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:10,435 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 19:13:10,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:10,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163593538] [2024-06-21 19:13:10,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163593538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:10,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:10,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:13:10,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065032598] [2024-06-21 19:13:10,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:10,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:13:10,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:10,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:13:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:13:10,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:13:10,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 350 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:10,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:10,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:13:10,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:10,762 INFO L124 PetriNetUnfolderBase]: 209/389 cut-off events. [2024-06-21 19:13:10,762 INFO L125 PetriNetUnfolderBase]: For 2059/2059 co-relation queries the response was YES. [2024-06-21 19:13:10,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 389 events. 209/389 cut-off events. For 2059/2059 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1437 event pairs, 52 based on Foata normal form. 2/389 useless extension candidates. Maximal degree in co-relation 1563. Up to 311 conditions per place. [2024-06-21 19:13:10,764 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 39 selfloop transitions, 20 changer transitions 0/63 dead transitions. [2024-06-21 19:13:10,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 513 flow [2024-06-21 19:13:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-06-21 19:13:10,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43317972350230416 [2024-06-21 19:13:10,766 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 350 flow. Second operand 7 states and 94 transitions. [2024-06-21 19:13:10,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 513 flow [2024-06-21 19:13:10,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 492 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 19:13:10,768 INFO L231 Difference]: Finished difference. Result has 62 places, 53 transitions, 401 flow [2024-06-21 19:13:10,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=401, PETRI_PLACES=62, PETRI_TRANSITIONS=53} [2024-06-21 19:13:10,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 32 predicate places. [2024-06-21 19:13:10,769 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 53 transitions, 401 flow [2024-06-21 19:13:10,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:10,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:10,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:10,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:13:10,770 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 19:13:10,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:10,770 INFO L85 PathProgramCache]: Analyzing trace with hash 780659128, now seen corresponding path program 1 times [2024-06-21 19:13:10,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:10,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113424864] [2024-06-21 19:13:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:10,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:12,062 INFO 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 19:13:12,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:12,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113424864] [2024-06-21 19:13:12,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113424864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:12,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:12,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:12,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430497982] [2024-06-21 19:13:12,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:12,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:12,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:12,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:12,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:12,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:12,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 53 transitions, 401 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 19:13:12,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:12,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:12,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:12,469 INFO L124 PetriNetUnfolderBase]: 219/396 cut-off events. [2024-06-21 19:13:12,469 INFO L125 PetriNetUnfolderBase]: For 2396/2396 co-relation queries the response was YES. [2024-06-21 19:13:12,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 396 events. 219/396 cut-off events. For 2396/2396 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1398 event pairs, 56 based on Foata normal form. 3/397 useless extension candidates. Maximal degree in co-relation 1661. Up to 371 conditions per place. [2024-06-21 19:13:12,471 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 49 selfloop transitions, 12 changer transitions 0/63 dead transitions. [2024-06-21 19:13:12,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 63 transitions, 551 flow [2024-06-21 19:13:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-21 19:13:12,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37327188940092165 [2024-06-21 19:13:12,472 INFO L175 Difference]: Start difference. First operand has 62 places, 53 transitions, 401 flow. Second operand 7 states and 81 transitions. [2024-06-21 19:13:12,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 63 transitions, 551 flow [2024-06-21 19:13:12,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 490 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:12,475 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 385 flow [2024-06-21 19:13:12,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-06-21 19:13:12,475 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-06-21 19:13:12,475 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 385 flow [2024-06-21 19:13:12,476 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 19:13:12,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:12,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:12,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:13:12,476 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 19:13:12,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:12,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1986983618, now seen corresponding path program 1 times [2024-06-21 19:13:12,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:12,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674697158] [2024-06-21 19:13:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:12,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:13,369 INFO 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 19:13:13,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674697158] [2024-06-21 19:13:13,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674697158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:13,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:13,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:13,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601403066] [2024-06-21 19:13:13,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:13,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:13,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:13,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:13,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:13,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:13,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 385 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 19:13:13,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:13,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:13,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:13,595 INFO L124 PetriNetUnfolderBase]: 235/422 cut-off events. [2024-06-21 19:13:13,596 INFO L125 PetriNetUnfolderBase]: For 2697/2697 co-relation queries the response was YES. [2024-06-21 19:13:13,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 422 events. 235/422 cut-off events. For 2697/2697 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1505 event pairs, 58 based on Foata normal form. 2/422 useless extension candidates. Maximal degree in co-relation 1761. Up to 361 conditions per place. [2024-06-21 19:13:13,598 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 49 selfloop transitions, 19 changer transitions 0/70 dead transitions. [2024-06-21 19:13:13,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 598 flow [2024-06-21 19:13:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 19:13:13,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055299539170507 [2024-06-21 19:13:13,599 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 385 flow. Second operand 7 states and 88 transitions. [2024-06-21 19:13:13,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 598 flow [2024-06-21 19:13:13,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 573 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:13,603 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 432 flow [2024-06-21 19:13:13,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-06-21 19:13:13,605 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2024-06-21 19:13:13,605 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 432 flow [2024-06-21 19:13:13,605 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 19:13:13,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:13,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:13,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:13:13,605 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 19:13:13,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:13,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1569378686, now seen corresponding path program 2 times [2024-06-21 19:13:13,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:13,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848403317] [2024-06-21 19:13:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:13,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:14,396 INFO 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 19:13:14,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:14,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848403317] [2024-06-21 19:13:14,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848403317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:14,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:14,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:14,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309373462] [2024-06-21 19:13:14,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:14,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:14,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:14,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:14,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:14,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 432 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 19:13:14,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:14,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:14,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:14,628 INFO L124 PetriNetUnfolderBase]: 238/427 cut-off events. [2024-06-21 19:13:14,628 INFO L125 PetriNetUnfolderBase]: For 3153/3153 co-relation queries the response was YES. [2024-06-21 19:13:14,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1935 conditions, 427 events. 238/427 cut-off events. For 3153/3153 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1529 event pairs, 56 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 1900. Up to 408 conditions per place. [2024-06-21 19:13:14,631 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 54 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-21 19:13:14,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 592 flow [2024-06-21 19:13:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 19:13:14,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-21 19:13:14,632 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 432 flow. Second operand 7 states and 79 transitions. [2024-06-21 19:13:14,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 592 flow [2024-06-21 19:13:14,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 68 transitions, 569 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 19:13:14,635 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 456 flow [2024-06-21 19:13:14,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-06-21 19:13:14,636 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2024-06-21 19:13:14,636 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 456 flow [2024-06-21 19:13:14,636 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 19:13:14,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:14,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:14,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:13:14,636 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 19:13:14,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:14,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1838771300, now seen corresponding path program 3 times [2024-06-21 19:13:14,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:14,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778506223] [2024-06-21 19:13:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:14,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:15,497 INFO 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 19:13:15,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:15,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778506223] [2024-06-21 19:13:15,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778506223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:15,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:15,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:15,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455374535] [2024-06-21 19:13:15,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:15,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:15,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:15,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:15,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:15,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 456 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 19:13:15,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:15,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:15,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:15,722 INFO L124 PetriNetUnfolderBase]: 236/424 cut-off events. [2024-06-21 19:13:15,722 INFO L125 PetriNetUnfolderBase]: For 3633/3633 co-relation queries the response was YES. [2024-06-21 19:13:15,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1984 conditions, 424 events. 236/424 cut-off events. For 3633/3633 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1520 event pairs, 56 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 1947. Up to 399 conditions per place. [2024-06-21 19:13:15,724 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 53 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-06-21 19:13:15,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 624 flow [2024-06-21 19:13:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-06-21 19:13:15,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37327188940092165 [2024-06-21 19:13:15,726 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 456 flow. Second operand 7 states and 81 transitions. [2024-06-21 19:13:15,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 624 flow [2024-06-21 19:13:15,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 595 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:15,730 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 484 flow [2024-06-21 19:13:15,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=484, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-06-21 19:13:15,731 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-21 19:13:15,731 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 484 flow [2024-06-21 19:13:15,731 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 19:13:15,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:15,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:15,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:13:15,732 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 19:13:15,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1284538366, now seen corresponding path program 4 times [2024-06-21 19:13:15,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:15,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128016699] [2024-06-21 19:13:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:13:16,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:16,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128016699] [2024-06-21 19:13:16,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128016699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:16,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:16,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565681469] [2024-06-21 19:13:16,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:16,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:16,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:16,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:16,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 484 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 19:13:16,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:16,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:16,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:17,289 INFO L124 PetriNetUnfolderBase]: 237/426 cut-off events. [2024-06-21 19:13:17,290 INFO L125 PetriNetUnfolderBase]: For 4224/4224 co-relation queries the response was YES. [2024-06-21 19:13:17,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2037 conditions, 426 events. 237/426 cut-off events. For 4224/4224 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1538 event pairs, 52 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 1999. Up to 328 conditions per place. [2024-06-21 19:13:17,292 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 53 selfloop transitions, 27 changer transitions 0/82 dead transitions. [2024-06-21 19:13:17,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 82 transitions, 773 flow [2024-06-21 19:13:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-21 19:13:17,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470046082949309 [2024-06-21 19:13:17,294 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 484 flow. Second operand 7 states and 97 transitions. [2024-06-21 19:13:17,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 82 transitions, 773 flow [2024-06-21 19:13:17,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 82 transitions, 734 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:17,299 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 547 flow [2024-06-21 19:13:17,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=547, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-06-21 19:13:17,299 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-21 19:13:17,300 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 547 flow [2024-06-21 19:13:17,300 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 19:13:17,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:17,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:17,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:13:17,300 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 19:13:17,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:17,300 INFO L85 PathProgramCache]: Analyzing trace with hash -777291083, now seen corresponding path program 1 times [2024-06-21 19:13:17,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:17,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344710925] [2024-06-21 19:13:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:17,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:18,627 INFO 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 19:13:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:18,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344710925] [2024-06-21 19:13:18,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344710925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:18,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:18,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541808596] [2024-06-21 19:13:18,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:18,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:18,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:18,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:18,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:13:18,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 547 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 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 19:13:18,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:18,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:13:18,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:18,894 INFO L124 PetriNetUnfolderBase]: 240/439 cut-off events. [2024-06-21 19:13:18,894 INFO L125 PetriNetUnfolderBase]: For 5071/5071 co-relation queries the response was YES. [2024-06-21 19:13:18,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2197 conditions, 439 events. 240/439 cut-off events. For 5071/5071 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1658 event pairs, 58 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 2159. Up to 358 conditions per place. [2024-06-21 19:13:18,897 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 57 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-21 19:13:18,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 86 transitions, 798 flow [2024-06-21 19:13:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 19:13:18,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919354838709675 [2024-06-21 19:13:18,898 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 547 flow. Second operand 8 states and 99 transitions. [2024-06-21 19:13:18,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 86 transitions, 798 flow [2024-06-21 19:13:18,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 736 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 19:13:18,903 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 583 flow [2024-06-21 19:13:18,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=583, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2024-06-21 19:13:18,904 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-06-21 19:13:18,904 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 583 flow [2024-06-21 19:13:18,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 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 19:13:18,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:18,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:18,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:13:18,904 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 19:13:18,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1470674017, now seen corresponding path program 2 times [2024-06-21 19:13:18,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:18,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615249946] [2024-06-21 19:13:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:18,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:20,018 INFO 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 19:13:20,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:20,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615249946] [2024-06-21 19:13:20,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615249946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:20,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:20,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:20,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610392710] [2024-06-21 19:13:20,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:20,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:20,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:20,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:20,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:20,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:13:20,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 583 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:20,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:20,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:13:20,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:20,294 INFO L124 PetriNetUnfolderBase]: 238/436 cut-off events. [2024-06-21 19:13:20,294 INFO L125 PetriNetUnfolderBase]: For 5470/5470 co-relation queries the response was YES. [2024-06-21 19:13:20,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2215 conditions, 436 events. 238/436 cut-off events. For 5470/5470 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1639 event pairs, 58 based on Foata normal form. 1/435 useless extension candidates. Maximal degree in co-relation 2174. Up to 367 conditions per place. [2024-06-21 19:13:20,296 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 57 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-21 19:13:20,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 84 transitions, 756 flow [2024-06-21 19:13:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2024-06-21 19:13:20,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147465437788018 [2024-06-21 19:13:20,298 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 583 flow. Second operand 7 states and 90 transitions. [2024-06-21 19:13:20,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 84 transitions, 756 flow [2024-06-21 19:13:20,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 728 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 19:13:20,304 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 594 flow [2024-06-21 19:13:20,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=594, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2024-06-21 19:13:20,305 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 19:13:20,305 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 594 flow [2024-06-21 19:13:20,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:20,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:20,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:20,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:13:20,305 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 19:13:20,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:20,305 INFO L85 PathProgramCache]: Analyzing trace with hash -773475851, now seen corresponding path program 1 times [2024-06-21 19:13:20,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:20,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245099635] [2024-06-21 19:13:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:20,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:13:21,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:21,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245099635] [2024-06-21 19:13:21,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245099635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:21,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:21,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:21,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658242499] [2024-06-21 19:13:21,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:21,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:21,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:21,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:21,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:21,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:21,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 594 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 19:13:21,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:21,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:21,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:21,630 INFO L124 PetriNetUnfolderBase]: 298/526 cut-off events. [2024-06-21 19:13:21,631 INFO L125 PetriNetUnfolderBase]: For 7386/7386 co-relation queries the response was YES. [2024-06-21 19:13:21,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2720 conditions, 526 events. 298/526 cut-off events. For 7386/7386 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2013 event pairs, 69 based on Foata normal form. 6/530 useless extension candidates. Maximal degree in co-relation 2677. Up to 395 conditions per place. [2024-06-21 19:13:21,634 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 72 selfloop transitions, 24 changer transitions 0/98 dead transitions. [2024-06-21 19:13:21,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 98 transitions, 917 flow [2024-06-21 19:13:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 19:13:21,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:13:21,635 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 594 flow. Second operand 8 states and 104 transitions. [2024-06-21 19:13:21,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 98 transitions, 917 flow [2024-06-21 19:13:21,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 98 transitions, 882 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:21,644 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 677 flow [2024-06-21 19:13:21,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=677, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2024-06-21 19:13:21,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-06-21 19:13:21,644 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 677 flow [2024-06-21 19:13:21,645 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 19:13:21,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:21,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:21,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:13:21,645 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 19:13:21,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:21,645 INFO L85 PathProgramCache]: Analyzing trace with hash -773476068, now seen corresponding path program 1 times [2024-06-21 19:13:21,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:21,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327216166] [2024-06-21 19:13:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:21,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:22,546 INFO 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 19:13:22,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:22,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327216166] [2024-06-21 19:13:22,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327216166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:22,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:22,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624589728] [2024-06-21 19:13:22,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:22,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:22,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:22,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:22,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 677 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:22,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:22,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:22,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:22,797 INFO L124 PetriNetUnfolderBase]: 306/539 cut-off events. [2024-06-21 19:13:22,797 INFO L125 PetriNetUnfolderBase]: For 7964/7964 co-relation queries the response was YES. [2024-06-21 19:13:22,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2989 conditions, 539 events. 306/539 cut-off events. For 7964/7964 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2071 event pairs, 70 based on Foata normal form. 1/538 useless extension candidates. Maximal degree in co-relation 2943. Up to 474 conditions per place. [2024-06-21 19:13:22,800 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 70 selfloop transitions, 25 changer transitions 0/97 dead transitions. [2024-06-21 19:13:22,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 97 transitions, 1004 flow [2024-06-21 19:13:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 19:13:22,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055299539170507 [2024-06-21 19:13:22,801 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 677 flow. Second operand 7 states and 88 transitions. [2024-06-21 19:13:22,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 97 transitions, 1004 flow [2024-06-21 19:13:22,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 97 transitions, 974 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 19:13:22,811 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 739 flow [2024-06-21 19:13:22,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=739, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2024-06-21 19:13:22,812 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-21 19:13:22,812 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 739 flow [2024-06-21 19:13:22,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:22,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:22,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:22,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:13:22,812 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 19:13:22,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:22,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1466954792, now seen corresponding path program 2 times [2024-06-21 19:13:22,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:22,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673778248] [2024-06-21 19:13:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:22,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:13:23,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:23,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673778248] [2024-06-21 19:13:23,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673778248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:23,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:23,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:23,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983309455] [2024-06-21 19:13:23,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:23,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:23,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:23,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:23,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:23,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:23,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 739 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:23,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:23,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:23,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:24,025 INFO L124 PetriNetUnfolderBase]: 304/536 cut-off events. [2024-06-21 19:13:24,025 INFO L125 PetriNetUnfolderBase]: For 8499/8499 co-relation queries the response was YES. [2024-06-21 19:13:24,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3001 conditions, 536 events. 304/536 cut-off events. For 8499/8499 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2055 event pairs, 70 based on Foata normal form. 1/535 useless extension candidates. Maximal degree in co-relation 2952. Up to 472 conditions per place. [2024-06-21 19:13:24,029 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 67 selfloop transitions, 28 changer transitions 0/97 dead transitions. [2024-06-21 19:13:24,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 97 transitions, 998 flow [2024-06-21 19:13:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 19:13:24,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41013824884792627 [2024-06-21 19:13:24,030 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 739 flow. Second operand 7 states and 89 transitions. [2024-06-21 19:13:24,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 97 transitions, 998 flow [2024-06-21 19:13:24,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 97 transitions, 959 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 19:13:24,039 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 785 flow [2024-06-21 19:13:24,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=785, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2024-06-21 19:13:24,040 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2024-06-21 19:13:24,040 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 785 flow [2024-06-21 19:13:24,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:24,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:24,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:24,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:13:24,040 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 19:13:24,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1405831081, now seen corresponding path program 2 times [2024-06-21 19:13:24,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:24,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74146005] [2024-06-21 19:13:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:24,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:24,894 INFO 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 19:13:24,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:24,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74146005] [2024-06-21 19:13:24,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74146005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:24,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:24,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:24,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199136848] [2024-06-21 19:13:24,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:24,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:24,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:24,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:24,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:24,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:24,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 785 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 19:13:24,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:24,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:24,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:25,216 INFO L124 PetriNetUnfolderBase]: 313/551 cut-off events. [2024-06-21 19:13:25,216 INFO L125 PetriNetUnfolderBase]: For 9939/9939 co-relation queries the response was YES. [2024-06-21 19:13:25,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 551 events. 313/551 cut-off events. For 9939/9939 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2119 event pairs, 68 based on Foata normal form. 3/552 useless extension candidates. Maximal degree in co-relation 3115. Up to 523 conditions per place. [2024-06-21 19:13:25,221 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 83 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-06-21 19:13:25,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 1023 flow [2024-06-21 19:13:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 19:13:25,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 19:13:25,223 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 785 flow. Second operand 8 states and 90 transitions. [2024-06-21 19:13:25,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 1023 flow [2024-06-21 19:13:25,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 99 transitions, 970 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:25,234 INFO L231 Difference]: Finished difference. Result has 98 places, 90 transitions, 791 flow [2024-06-21 19:13:25,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=791, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2024-06-21 19:13:25,234 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-06-21 19:13:25,234 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 791 flow [2024-06-21 19:13:25,235 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 19:13:25,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:25,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:25,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:13:25,235 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 19:13:25,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:25,235 INFO L85 PathProgramCache]: Analyzing trace with hash 429985406, now seen corresponding path program 3 times [2024-06-21 19:13:25,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:25,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086130156] [2024-06-21 19:13:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:25,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:26,148 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 19:13:26,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:26,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086130156] [2024-06-21 19:13:26,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086130156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:26,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:26,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:26,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893573668] [2024-06-21 19:13:26,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:26,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:26,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:26,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:26,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 791 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:26,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:26,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:26,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:26,421 INFO L124 PetriNetUnfolderBase]: 311/548 cut-off events. [2024-06-21 19:13:26,421 INFO L125 PetriNetUnfolderBase]: For 10292/10292 co-relation queries the response was YES. [2024-06-21 19:13:26,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3183 conditions, 548 events. 311/548 cut-off events. For 10292/10292 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2108 event pairs, 69 based on Foata normal form. 1/547 useless extension candidates. Maximal degree in co-relation 3131. Up to 526 conditions per place. [2024-06-21 19:13:26,427 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 81 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2024-06-21 19:13:26,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 96 transitions, 993 flow [2024-06-21 19:13:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-21 19:13:26,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-21 19:13:26,428 INFO L175 Difference]: Start difference. First operand has 98 places, 90 transitions, 791 flow. Second operand 7 states and 80 transitions. [2024-06-21 19:13:26,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 96 transitions, 993 flow [2024-06-21 19:13:26,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 943 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:26,445 INFO L231 Difference]: Finished difference. Result has 99 places, 90 transitions, 772 flow [2024-06-21 19:13:26,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=772, PETRI_PLACES=99, PETRI_TRANSITIONS=90} [2024-06-21 19:13:26,445 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-21 19:13:26,446 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 90 transitions, 772 flow [2024-06-21 19:13:26,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:26,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:26,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:26,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:13:26,446 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 19:13:26,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1406097991, now seen corresponding path program 3 times [2024-06-21 19:13:26,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:26,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502811588] [2024-06-21 19:13:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:26,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:27,377 INFO 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 19:13:27,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:27,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502811588] [2024-06-21 19:13:27,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502811588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:27,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:27,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770351812] [2024-06-21 19:13:27,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:27,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:27,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:27,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:27,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:27,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 90 transitions, 772 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 19:13:27,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:27,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:27,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:27,696 INFO L124 PetriNetUnfolderBase]: 320/563 cut-off events. [2024-06-21 19:13:27,696 INFO L125 PetriNetUnfolderBase]: For 11615/11615 co-relation queries the response was YES. [2024-06-21 19:13:27,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 563 events. 320/563 cut-off events. For 11615/11615 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2185 event pairs, 68 based on Foata normal form. 3/564 useless extension candidates. Maximal degree in co-relation 3208. Up to 523 conditions per place. [2024-06-21 19:13:27,701 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 84 selfloop transitions, 17 changer transitions 0/103 dead transitions. [2024-06-21 19:13:27,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 103 transitions, 1028 flow [2024-06-21 19:13:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 19:13:27,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 19:13:27,702 INFO L175 Difference]: Start difference. First operand has 99 places, 90 transitions, 772 flow. Second operand 8 states and 94 transitions. [2024-06-21 19:13:27,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 103 transitions, 1028 flow [2024-06-21 19:13:27,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 103 transitions, 992 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:27,716 INFO L231 Difference]: Finished difference. Result has 101 places, 92 transitions, 805 flow [2024-06-21 19:13:27,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=805, PETRI_PLACES=101, PETRI_TRANSITIONS=92} [2024-06-21 19:13:27,716 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-21 19:13:27,716 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 92 transitions, 805 flow [2024-06-21 19:13:27,717 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 19:13:27,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:27,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:27,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:13:27,717 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 19:13:27,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1167336471, now seen corresponding path program 4 times [2024-06-21 19:13:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579701001] [2024-06-21 19:13:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:28,691 INFO 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 19:13:28,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:28,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579701001] [2024-06-21 19:13:28,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579701001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:28,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:28,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:28,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673408003] [2024-06-21 19:13:28,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:28,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:28,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:28,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:28,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:28,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 92 transitions, 805 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 19:13:28,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:28,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:28,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:28,923 INFO L124 PetriNetUnfolderBase]: 314/554 cut-off events. [2024-06-21 19:13:28,923 INFO L125 PetriNetUnfolderBase]: For 11884/11884 co-relation queries the response was YES. [2024-06-21 19:13:28,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 554 events. 314/554 cut-off events. For 11884/11884 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2142 event pairs, 66 based on Foata normal form. 3/555 useless extension candidates. Maximal degree in co-relation 3176. Up to 499 conditions per place. [2024-06-21 19:13:28,927 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-06-21 19:13:28,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 105 transitions, 1069 flow [2024-06-21 19:13:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 19:13:28,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:13:28,929 INFO L175 Difference]: Start difference. First operand has 101 places, 92 transitions, 805 flow. Second operand 8 states and 96 transitions. [2024-06-21 19:13:28,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 105 transitions, 1069 flow [2024-06-21 19:13:28,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 1018 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:28,943 INFO L231 Difference]: Finished difference. Result has 103 places, 94 transitions, 835 flow [2024-06-21 19:13:28,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=835, PETRI_PLACES=103, PETRI_TRANSITIONS=94} [2024-06-21 19:13:28,943 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2024-06-21 19:13:28,943 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 94 transitions, 835 flow [2024-06-21 19:13:28,944 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 19:13:28,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:28,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:28,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:13:28,944 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 19:13:28,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash 366309419, now seen corresponding path program 3 times [2024-06-21 19:13:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:28,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255758186] [2024-06-21 19:13:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:28,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:30,130 INFO 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 19:13:30,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:30,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255758186] [2024-06-21 19:13:30,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255758186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:30,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:30,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:30,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270151614] [2024-06-21 19:13:30,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:30,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:30,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:30,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:13:30,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 94 transitions, 835 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:30,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:30,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:13:30,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:30,385 INFO L124 PetriNetUnfolderBase]: 302/544 cut-off events. [2024-06-21 19:13:30,385 INFO L125 PetriNetUnfolderBase]: For 12369/12369 co-relation queries the response was YES. [2024-06-21 19:13:30,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3212 conditions, 544 events. 302/544 cut-off events. For 12369/12369 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2156 event pairs, 56 based on Foata normal form. 1/543 useless extension candidates. Maximal degree in co-relation 3157. Up to 418 conditions per place. [2024-06-21 19:13:30,389 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 68 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2024-06-21 19:13:30,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 110 transitions, 1145 flow [2024-06-21 19:13:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-21 19:13:30,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700460829493088 [2024-06-21 19:13:30,390 INFO L175 Difference]: Start difference. First operand has 103 places, 94 transitions, 835 flow. Second operand 7 states and 102 transitions. [2024-06-21 19:13:30,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 110 transitions, 1145 flow [2024-06-21 19:13:30,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 110 transitions, 1082 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:30,404 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 876 flow [2024-06-21 19:13:30,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2024-06-21 19:13:30,404 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-21 19:13:30,404 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 876 flow [2024-06-21 19:13:30,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:30,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:30,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:30,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:13:30,405 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 19:13:30,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:30,405 INFO L85 PathProgramCache]: Analyzing trace with hash 395027819, now seen corresponding path program 4 times [2024-06-21 19:13:30,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:30,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159452873] [2024-06-21 19:13:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:30,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:31,588 INFO 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 19:13:31,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159452873] [2024-06-21 19:13:31,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159452873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:31,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:31,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:31,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743188517] [2024-06-21 19:13:31,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:31,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:31,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:31,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:31,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:13:31,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:31,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:31,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:13:31,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:31,866 INFO L124 PetriNetUnfolderBase]: 300/541 cut-off events. [2024-06-21 19:13:31,866 INFO L125 PetriNetUnfolderBase]: For 12740/12740 co-relation queries the response was YES. [2024-06-21 19:13:31,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3210 conditions, 541 events. 300/541 cut-off events. For 12740/12740 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2147 event pairs, 54 based on Foata normal form. 1/540 useless extension candidates. Maximal degree in co-relation 3154. Up to 442 conditions per place. [2024-06-21 19:13:31,872 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 68 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-06-21 19:13:31,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 106 transitions, 1084 flow [2024-06-21 19:13:31,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:31,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-21 19:13:31,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 19:13:31,874 INFO L175 Difference]: Start difference. First operand has 104 places, 98 transitions, 876 flow. Second operand 7 states and 98 transitions. [2024-06-21 19:13:31,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 106 transitions, 1084 flow [2024-06-21 19:13:31,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 106 transitions, 1043 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 19:13:31,886 INFO L231 Difference]: Finished difference. Result has 107 places, 98 transitions, 895 flow [2024-06-21 19:13:31,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=895, PETRI_PLACES=107, PETRI_TRANSITIONS=98} [2024-06-21 19:13:31,887 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-21 19:13:31,887 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 98 transitions, 895 flow [2024-06-21 19:13:31,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:31,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:31,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:31,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:13:31,887 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 19:13:31,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1165210050, now seen corresponding path program 4 times [2024-06-21 19:13:31,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:31,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896323690] [2024-06-21 19:13:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:31,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:33,086 INFO 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 19:13:33,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:33,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896323690] [2024-06-21 19:13:33,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896323690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:33,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:33,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:33,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703647420] [2024-06-21 19:13:33,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:33,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:33,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:33,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:33,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 98 transitions, 895 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:33,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:33,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:33,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:33,441 INFO L124 PetriNetUnfolderBase]: 322/568 cut-off events. [2024-06-21 19:13:33,441 INFO L125 PetriNetUnfolderBase]: For 12525/12525 co-relation queries the response was YES. [2024-06-21 19:13:33,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3357 conditions, 568 events. 322/568 cut-off events. For 12525/12525 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2243 event pairs, 57 based on Foata normal form. 1/567 useless extension candidates. Maximal degree in co-relation 3300. Up to 464 conditions per place. [2024-06-21 19:13:33,446 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 79 selfloop transitions, 34 changer transitions 0/115 dead transitions. [2024-06-21 19:13:33,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 115 transitions, 1248 flow [2024-06-21 19:13:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-21 19:13:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470046082949309 [2024-06-21 19:13:33,454 INFO L175 Difference]: Start difference. First operand has 107 places, 98 transitions, 895 flow. Second operand 7 states and 97 transitions. [2024-06-21 19:13:33,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 115 transitions, 1248 flow [2024-06-21 19:13:33,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 115 transitions, 1171 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:13:33,467 INFO L231 Difference]: Finished difference. Result has 109 places, 103 transitions, 959 flow [2024-06-21 19:13:33,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=959, PETRI_PLACES=109, PETRI_TRANSITIONS=103} [2024-06-21 19:13:33,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2024-06-21 19:13:33,468 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 103 transitions, 959 flow [2024-06-21 19:13:33,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:33,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:33,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:33,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:13:33,468 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 19:13:33,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1165982663, now seen corresponding path program 5 times [2024-06-21 19:13:33,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:33,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65298910] [2024-06-21 19:13:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:34,993 INFO 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 19:13:34,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:34,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65298910] [2024-06-21 19:13:34,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65298910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:34,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:34,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612365669] [2024-06-21 19:13:34,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:34,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:34,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:34,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:35,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:35,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 103 transitions, 959 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 19:13:35,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:35,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:35,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:35,473 INFO L124 PetriNetUnfolderBase]: 323/571 cut-off events. [2024-06-21 19:13:35,473 INFO L125 PetriNetUnfolderBase]: For 12601/12601 co-relation queries the response was YES. [2024-06-21 19:13:35,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3370 conditions, 571 events. 323/571 cut-off events. For 12601/12601 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2247 event pairs, 60 based on Foata normal form. 2/571 useless extension candidates. Maximal degree in co-relation 3312. Up to 417 conditions per place. [2024-06-21 19:13:35,476 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 90 selfloop transitions, 36 changer transitions 0/128 dead transitions. [2024-06-21 19:13:35,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 128 transitions, 1423 flow [2024-06-21 19:13:35,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-21 19:13:35,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2024-06-21 19:13:35,478 INFO L175 Difference]: Start difference. First operand has 109 places, 103 transitions, 959 flow. Second operand 8 states and 110 transitions. [2024-06-21 19:13:35,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 128 transitions, 1423 flow [2024-06-21 19:13:35,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 128 transitions, 1357 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 19:13:35,491 INFO L231 Difference]: Finished difference. Result has 114 places, 111 transitions, 1060 flow [2024-06-21 19:13:35,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1060, PETRI_PLACES=114, PETRI_TRANSITIONS=111} [2024-06-21 19:13:35,491 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-06-21 19:13:35,492 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 111 transitions, 1060 flow [2024-06-21 19:13:35,492 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 19:13:35,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:35,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:35,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:13:35,492 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 19:13:35,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:35,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1165006380, now seen corresponding path program 5 times [2024-06-21 19:13:35,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:35,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71097598] [2024-06-21 19:13:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:35,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:13:36,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:36,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71097598] [2024-06-21 19:13:36,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71097598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:36,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:36,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:13:36,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955071055] [2024-06-21 19:13:36,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:36,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:13:36,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:36,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:13:36,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:13:36,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:36,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 111 transitions, 1060 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:36,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:36,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:36,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:37,077 INFO L124 PetriNetUnfolderBase]: 321/568 cut-off events. [2024-06-21 19:13:37,077 INFO L125 PetriNetUnfolderBase]: For 12868/12868 co-relation queries the response was YES. [2024-06-21 19:13:37,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3474 conditions, 568 events. 321/568 cut-off events. For 12868/12868 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2239 event pairs, 58 based on Foata normal form. 1/567 useless extension candidates. Maximal degree in co-relation 3414. Up to 464 conditions per place. [2024-06-21 19:13:37,081 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 87 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-21 19:13:37,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 121 transitions, 1324 flow [2024-06-21 19:13:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:13:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:13:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-06-21 19:13:37,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:13:37,082 INFO L175 Difference]: Start difference. First operand has 114 places, 111 transitions, 1060 flow. Second operand 7 states and 93 transitions. [2024-06-21 19:13:37,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 121 transitions, 1324 flow [2024-06-21 19:13:37,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 1271 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 19:13:37,098 INFO L231 Difference]: Finished difference. Result has 118 places, 111 transitions, 1076 flow [2024-06-21 19:13:37,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1076, PETRI_PLACES=118, PETRI_TRANSITIONS=111} [2024-06-21 19:13:37,099 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-21 19:13:37,099 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 111 transitions, 1076 flow [2024-06-21 19:13:37,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:37,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:37,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:37,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:13:37,100 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 19:13:37,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:37,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1673720617, now seen corresponding path program 1 times [2024-06-21 19:13:37,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:37,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425432283] [2024-06-21 19:13:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:37,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:38,577 INFO 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 19:13:38,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:38,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425432283] [2024-06-21 19:13:38,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425432283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:38,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:38,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:13:38,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699472372] [2024-06-21 19:13:38,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:38,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:13:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:13:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:13:38,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:13:38,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 111 transitions, 1076 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:38,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:38,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:13:38,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:38,987 INFO L124 PetriNetUnfolderBase]: 325/590 cut-off events. [2024-06-21 19:13:38,989 INFO L125 PetriNetUnfolderBase]: For 15339/15339 co-relation queries the response was YES. [2024-06-21 19:13:38,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3640 conditions, 590 events. 325/590 cut-off events. For 15339/15339 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2486 event pairs, 69 based on Foata normal form. 2/587 useless extension candidates. Maximal degree in co-relation 3578. Up to 472 conditions per place. [2024-06-21 19:13:38,993 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 93 selfloop transitions, 22 changer transitions 0/128 dead transitions. [2024-06-21 19:13:38,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 128 transitions, 1422 flow [2024-06-21 19:13:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:38,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 19:13:38,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 19:13:38,995 INFO L175 Difference]: Start difference. First operand has 118 places, 111 transitions, 1076 flow. Second operand 9 states and 111 transitions. [2024-06-21 19:13:38,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 128 transitions, 1422 flow [2024-06-21 19:13:39,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 128 transitions, 1359 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:39,014 INFO L231 Difference]: Finished difference. Result has 123 places, 115 transitions, 1101 flow [2024-06-21 19:13:39,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1101, PETRI_PLACES=123, PETRI_TRANSITIONS=115} [2024-06-21 19:13:39,015 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-21 19:13:39,015 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 115 transitions, 1101 flow [2024-06-21 19:13:39,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:39,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:39,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:39,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:13:39,016 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 19:13:39,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1673781067, now seen corresponding path program 2 times [2024-06-21 19:13:39,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:39,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080585701] [2024-06-21 19:13:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:39,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:40,570 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 19:13:40,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080585701] [2024-06-21 19:13:40,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080585701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:40,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:40,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:13:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759362655] [2024-06-21 19:13:40,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:13:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:13:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:13:40,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:13:40,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 115 transitions, 1101 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:40,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:40,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:13:40,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:40,935 INFO L124 PetriNetUnfolderBase]: 329/600 cut-off events. [2024-06-21 19:13:40,935 INFO L125 PetriNetUnfolderBase]: For 16315/16315 co-relation queries the response was YES. [2024-06-21 19:13:40,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3739 conditions, 600 events. 329/600 cut-off events. For 16315/16315 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2537 event pairs, 73 based on Foata normal form. 2/600 useless extension candidates. Maximal degree in co-relation 3674. Up to 509 conditions per place. [2024-06-21 19:13:40,939 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 93 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-06-21 19:13:40,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 1366 flow [2024-06-21 19:13:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 19:13:40,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:13:40,941 INFO L175 Difference]: Start difference. First operand has 123 places, 115 transitions, 1101 flow. Second operand 9 states and 108 transitions. [2024-06-21 19:13:40,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 1366 flow [2024-06-21 19:13:40,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 1326 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:40,966 INFO L231 Difference]: Finished difference. Result has 127 places, 116 transitions, 1120 flow [2024-06-21 19:13:40,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1120, PETRI_PLACES=127, PETRI_TRANSITIONS=116} [2024-06-21 19:13:40,966 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-21 19:13:40,966 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 116 transitions, 1120 flow [2024-06-21 19:13:40,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:40,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:40,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:40,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:13:40,967 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 19:13:40,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1673781191, now seen corresponding path program 1 times [2024-06-21 19:13:40,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:40,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349369314] [2024-06-21 19:13:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:40,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:42,198 INFO 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 19:13:42,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:42,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349369314] [2024-06-21 19:13:42,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349369314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:42,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:42,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697745382] [2024-06-21 19:13:42,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:42,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:42,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:42,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:42,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:42,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 116 transitions, 1120 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:42,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:42,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:42,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:42,487 INFO L124 PetriNetUnfolderBase]: 353/629 cut-off events. [2024-06-21 19:13:42,487 INFO L125 PetriNetUnfolderBase]: For 17219/17219 co-relation queries the response was YES. [2024-06-21 19:13:42,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3928 conditions, 629 events. 353/629 cut-off events. For 17219/17219 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2638 event pairs, 79 based on Foata normal form. 1/628 useless extension candidates. Maximal degree in co-relation 3861. Up to 534 conditions per place. [2024-06-21 19:13:42,491 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 99 selfloop transitions, 29 changer transitions 0/130 dead transitions. [2024-06-21 19:13:42,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 130 transitions, 1484 flow [2024-06-21 19:13:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-21 19:13:42,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-21 19:13:42,496 INFO L175 Difference]: Start difference. First operand has 127 places, 116 transitions, 1120 flow. Second operand 9 states and 104 transitions. [2024-06-21 19:13:42,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 130 transitions, 1484 flow [2024-06-21 19:13:42,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 130 transitions, 1442 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:13:42,520 INFO L231 Difference]: Finished difference. Result has 129 places, 120 transitions, 1169 flow [2024-06-21 19:13:42,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1169, PETRI_PLACES=129, PETRI_TRANSITIONS=120} [2024-06-21 19:13:42,521 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 99 predicate places. [2024-06-21 19:13:42,521 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 120 transitions, 1169 flow [2024-06-21 19:13:42,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:42,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:42,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:42,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:13:42,522 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 19:13:42,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:42,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1676582351, now seen corresponding path program 2 times [2024-06-21 19:13:42,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:42,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054942149] [2024-06-21 19:13:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:42,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:43,701 INFO 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 19:13:43,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:43,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054942149] [2024-06-21 19:13:43,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054942149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:43,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:43,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:43,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293893938] [2024-06-21 19:13:43,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:43,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:43,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:43,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:43,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 120 transitions, 1169 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:43,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:43,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:43,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:44,022 INFO L124 PetriNetUnfolderBase]: 356/634 cut-off events. [2024-06-21 19:13:44,022 INFO L125 PetriNetUnfolderBase]: For 18372/18372 co-relation queries the response was YES. [2024-06-21 19:13:44,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4031 conditions, 634 events. 356/634 cut-off events. For 18372/18372 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2658 event pairs, 79 based on Foata normal form. 1/633 useless extension candidates. Maximal degree in co-relation 3963. Up to 567 conditions per place. [2024-06-21 19:13:44,027 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 101 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2024-06-21 19:13:44,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 130 transitions, 1461 flow [2024-06-21 19:13:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 19:13:44,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:13:44,028 INFO L175 Difference]: Start difference. First operand has 129 places, 120 transitions, 1169 flow. Second operand 8 states and 96 transitions. [2024-06-21 19:13:44,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 130 transitions, 1461 flow [2024-06-21 19:13:44,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 130 transitions, 1421 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:13:44,053 INFO L231 Difference]: Finished difference. Result has 132 places, 122 transitions, 1208 flow [2024-06-21 19:13:44,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1208, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2024-06-21 19:13:44,053 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-21 19:13:44,053 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 1208 flow [2024-06-21 19:13:44,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:44,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:44,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:44,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:13:44,054 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 19:13:44,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:44,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1653746717, now seen corresponding path program 3 times [2024-06-21 19:13:44,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:44,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441258039] [2024-06-21 19:13:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:44,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:45,277 INFO 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 19:13:45,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:45,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441258039] [2024-06-21 19:13:45,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441258039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:45,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:45,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:45,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592418902] [2024-06-21 19:13:45,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:45,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:45,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:45,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:45,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:45,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:45,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 1208 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:45,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:45,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:45,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:45,556 INFO L124 PetriNetUnfolderBase]: 359/639 cut-off events. [2024-06-21 19:13:45,556 INFO L125 PetriNetUnfolderBase]: For 19527/19527 co-relation queries the response was YES. [2024-06-21 19:13:45,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4138 conditions, 639 events. 359/639 cut-off events. For 19527/19527 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2683 event pairs, 79 based on Foata normal form. 1/638 useless extension candidates. Maximal degree in co-relation 4068. Up to 566 conditions per place. [2024-06-21 19:13:45,560 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 100 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-06-21 19:13:45,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 132 transitions, 1506 flow [2024-06-21 19:13:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 19:13:45,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-21 19:13:45,561 INFO L175 Difference]: Start difference. First operand has 132 places, 122 transitions, 1208 flow. Second operand 8 states and 97 transitions. [2024-06-21 19:13:45,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 132 transitions, 1506 flow [2024-06-21 19:13:45,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 132 transitions, 1449 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:45,585 INFO L231 Difference]: Finished difference. Result has 134 places, 124 transitions, 1238 flow [2024-06-21 19:13:45,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1238, PETRI_PLACES=134, PETRI_TRANSITIONS=124} [2024-06-21 19:13:45,585 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-21 19:13:45,585 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 124 transitions, 1238 flow [2024-06-21 19:13:45,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:45,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:45,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:45,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:13:45,586 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 19:13:45,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:45,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1676577577, now seen corresponding path program 3 times [2024-06-21 19:13:45,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:45,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502251309] [2024-06-21 19:13:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:45,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:46,843 INFO 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 19:13:46,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:46,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502251309] [2024-06-21 19:13:46,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502251309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:46,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:46,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:46,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101107437] [2024-06-21 19:13:46,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:46,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:46,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:46,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:46,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:46,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:13:46,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 124 transitions, 1238 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:46,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:46,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:13:46,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:47,145 INFO L124 PetriNetUnfolderBase]: 342/620 cut-off events. [2024-06-21 19:13:47,145 INFO L125 PetriNetUnfolderBase]: For 20463/20463 co-relation queries the response was YES. [2024-06-21 19:13:47,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4032 conditions, 620 events. 342/620 cut-off events. For 20463/20463 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2646 event pairs, 72 based on Foata normal form. 2/620 useless extension candidates. Maximal degree in co-relation 3961. Up to 531 conditions per place. [2024-06-21 19:13:47,157 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 98 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2024-06-21 19:13:47,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 133 transitions, 1492 flow [2024-06-21 19:13:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 19:13:47,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 19:13:47,159 INFO L175 Difference]: Start difference. First operand has 134 places, 124 transitions, 1238 flow. Second operand 8 states and 100 transitions. [2024-06-21 19:13:47,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 133 transitions, 1492 flow [2024-06-21 19:13:47,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 133 transitions, 1423 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:47,186 INFO L231 Difference]: Finished difference. Result has 136 places, 124 transitions, 1209 flow [2024-06-21 19:13:47,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1209, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2024-06-21 19:13:47,187 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-06-21 19:13:47,187 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 1209 flow [2024-06-21 19:13:47,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:47,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:47,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:47,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:13:47,188 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 19:13:47,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1791868871, now seen corresponding path program 4 times [2024-06-21 19:13:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:47,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551352996] [2024-06-21 19:13:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:47,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:48,437 INFO 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 19:13:48,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:48,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551352996] [2024-06-21 19:13:48,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551352996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:48,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:48,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:48,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559042140] [2024-06-21 19:13:48,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:48,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:48,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:48,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:48,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:48,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 1209 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:48,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:48,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:48,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:48,707 INFO L124 PetriNetUnfolderBase]: 359/639 cut-off events. [2024-06-21 19:13:48,707 INFO L125 PetriNetUnfolderBase]: For 20724/20724 co-relation queries the response was YES. [2024-06-21 19:13:48,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4136 conditions, 639 events. 359/639 cut-off events. For 20724/20724 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2696 event pairs, 82 based on Foata normal form. 1/638 useless extension candidates. Maximal degree in co-relation 4064. Up to 556 conditions per place. [2024-06-21 19:13:48,711 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 101 selfloop transitions, 34 changer transitions 0/137 dead transitions. [2024-06-21 19:13:48,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 137 transitions, 1597 flow [2024-06-21 19:13:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 19:13:48,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-21 19:13:48,722 INFO L175 Difference]: Start difference. First operand has 136 places, 124 transitions, 1209 flow. Second operand 8 states and 101 transitions. [2024-06-21 19:13:48,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 137 transitions, 1597 flow [2024-06-21 19:13:48,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 137 transitions, 1559 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:48,751 INFO L231 Difference]: Finished difference. Result has 138 places, 126 transitions, 1266 flow [2024-06-21 19:13:48,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1266, PETRI_PLACES=138, PETRI_TRANSITIONS=126} [2024-06-21 19:13:48,752 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-21 19:13:48,752 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 126 transitions, 1266 flow [2024-06-21 19:13:48,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:48,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:48,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:48,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:13:48,753 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 19:13:48,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:48,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1769222213, now seen corresponding path program 1 times [2024-06-21 19:13:48,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:48,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972513043] [2024-06-21 19:13:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:49,764 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 19:13:49,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:49,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972513043] [2024-06-21 19:13:49,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972513043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:49,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:49,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103304122] [2024-06-21 19:13:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:49,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:49,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:49,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:49,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:49,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:49,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 126 transitions, 1266 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:49,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:49,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:49,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:50,061 INFO L124 PetriNetUnfolderBase]: 383/678 cut-off events. [2024-06-21 19:13:50,061 INFO L125 PetriNetUnfolderBase]: For 24985/24985 co-relation queries the response was YES. [2024-06-21 19:13:50,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 678 events. 383/678 cut-off events. For 24985/24985 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2888 event pairs, 85 based on Foata normal form. 3/679 useless extension candidates. Maximal degree in co-relation 4413. Up to 505 conditions per place. [2024-06-21 19:13:50,066 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 39 changer transitions 0/147 dead transitions. [2024-06-21 19:13:50,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 147 transitions, 1798 flow [2024-06-21 19:13:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 19:13:50,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 19:13:50,078 INFO L175 Difference]: Start difference. First operand has 138 places, 126 transitions, 1266 flow. Second operand 9 states and 112 transitions. [2024-06-21 19:13:50,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 147 transitions, 1798 flow [2024-06-21 19:13:50,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 147 transitions, 1711 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:50,113 INFO L231 Difference]: Finished difference. Result has 141 places, 132 transitions, 1330 flow [2024-06-21 19:13:50,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1330, PETRI_PLACES=141, PETRI_TRANSITIONS=132} [2024-06-21 19:13:50,114 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2024-06-21 19:13:50,114 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 132 transitions, 1330 flow [2024-06-21 19:13:50,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:50,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:50,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:50,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:13:50,115 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 19:13:50,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1769215703, now seen corresponding path program 2 times [2024-06-21 19:13:50,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:50,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204532684] [2024-06-21 19:13:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:50,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:51,146 INFO 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 19:13:51,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:51,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204532684] [2024-06-21 19:13:51,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204532684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:51,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:51,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:51,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184783175] [2024-06-21 19:13:51,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:51,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:51,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:51,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:51,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:51,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 132 transitions, 1330 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:51,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:51,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:51,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:51,460 INFO L124 PetriNetUnfolderBase]: 392/693 cut-off events. [2024-06-21 19:13:51,460 INFO L125 PetriNetUnfolderBase]: For 26696/26696 co-relation queries the response was YES. [2024-06-21 19:13:51,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4627 conditions, 693 events. 392/693 cut-off events. For 26696/26696 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2982 event pairs, 85 based on Foata normal form. 3/694 useless extension candidates. Maximal degree in co-relation 4553. Up to 513 conditions per place. [2024-06-21 19:13:51,469 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 109 selfloop transitions, 41 changer transitions 0/152 dead transitions. [2024-06-21 19:13:51,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 152 transitions, 1856 flow [2024-06-21 19:13:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:13:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:13:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 19:13:51,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 19:13:51,470 INFO L175 Difference]: Start difference. First operand has 141 places, 132 transitions, 1330 flow. Second operand 9 states and 115 transitions. [2024-06-21 19:13:51,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 152 transitions, 1856 flow [2024-06-21 19:13:51,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 152 transitions, 1782 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 19:13:51,506 INFO L231 Difference]: Finished difference. Result has 146 places, 135 transitions, 1383 flow [2024-06-21 19:13:51,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1383, PETRI_PLACES=146, PETRI_TRANSITIONS=135} [2024-06-21 19:13:51,507 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 116 predicate places. [2024-06-21 19:13:51,507 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 135 transitions, 1383 flow [2024-06-21 19:13:51,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:51,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:51,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:51,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:13:51,507 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 19:13:51,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:51,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1791873707, now seen corresponding path program 3 times [2024-06-21 19:13:51,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:51,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199844246] [2024-06-21 19:13:51,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:51,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:52,541 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 19:13:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:52,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199844246] [2024-06-21 19:13:52,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199844246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:52,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:52,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763793574] [2024-06-21 19:13:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:52,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:52,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 135 transitions, 1383 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:52,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:52,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:52,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:52,826 INFO L124 PetriNetUnfolderBase]: 386/684 cut-off events. [2024-06-21 19:13:52,826 INFO L125 PetriNetUnfolderBase]: For 26371/26371 co-relation queries the response was YES. [2024-06-21 19:13:52,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4508 conditions, 684 events. 386/684 cut-off events. For 26371/26371 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2951 event pairs, 79 based on Foata normal form. 3/685 useless extension candidates. Maximal degree in co-relation 4433. Up to 509 conditions per place. [2024-06-21 19:13:52,830 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 102 selfloop transitions, 46 changer transitions 0/150 dead transitions. [2024-06-21 19:13:52,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 150 transitions, 1793 flow [2024-06-21 19:13:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 19:13:52,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-06-21 19:13:52,831 INFO L175 Difference]: Start difference. First operand has 146 places, 135 transitions, 1383 flow. Second operand 8 states and 107 transitions. [2024-06-21 19:13:52,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 150 transitions, 1793 flow [2024-06-21 19:13:52,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 150 transitions, 1717 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:52,868 INFO L231 Difference]: Finished difference. Result has 148 places, 135 transitions, 1405 flow [2024-06-21 19:13:52,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1405, PETRI_PLACES=148, PETRI_TRANSITIONS=135} [2024-06-21 19:13:52,869 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-21 19:13:52,869 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 135 transitions, 1405 flow [2024-06-21 19:13:52,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:52,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:52,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:52,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:13:52,869 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 19:13:52,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1791873521, now seen corresponding path program 5 times [2024-06-21 19:13:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:52,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852361417] [2024-06-21 19:13:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:52,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:54,052 INFO 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 19:13:54,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:54,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852361417] [2024-06-21 19:13:54,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852361417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:54,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:54,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:54,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122018174] [2024-06-21 19:13:54,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:54,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:54,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:54,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:54,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:54,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 135 transitions, 1405 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:54,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:54,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:54,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:54,328 INFO L124 PetriNetUnfolderBase]: 389/689 cut-off events. [2024-06-21 19:13:54,328 INFO L125 PetriNetUnfolderBase]: For 26415/26415 co-relation queries the response was YES. [2024-06-21 19:13:54,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4593 conditions, 689 events. 389/689 cut-off events. For 26415/26415 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2960 event pairs, 82 based on Foata normal form. 1/688 useless extension candidates. Maximal degree in co-relation 4517. Up to 622 conditions per place. [2024-06-21 19:13:54,332 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 30 changer transitions 0/146 dead transitions. [2024-06-21 19:13:54,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 146 transitions, 1739 flow [2024-06-21 19:13:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:54,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 19:13:54,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-21 19:13:54,333 INFO L175 Difference]: Start difference. First operand has 148 places, 135 transitions, 1405 flow. Second operand 8 states and 97 transitions. [2024-06-21 19:13:54,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 146 transitions, 1739 flow [2024-06-21 19:13:54,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 146 transitions, 1613 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 19:13:54,370 INFO L231 Difference]: Finished difference. Result has 148 places, 137 transitions, 1370 flow [2024-06-21 19:13:54,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1370, PETRI_PLACES=148, PETRI_TRANSITIONS=137} [2024-06-21 19:13:54,371 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-21 19:13:54,371 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 137 transitions, 1370 flow [2024-06-21 19:13:54,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:54,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:54,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:54,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:13:54,371 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 19:13:54,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:54,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1792046501, now seen corresponding path program 6 times [2024-06-21 19:13:54,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:54,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527171215] [2024-06-21 19:13:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:55,532 INFO 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 19:13:55,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:55,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527171215] [2024-06-21 19:13:55,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527171215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:55,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:55,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:55,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728375764] [2024-06-21 19:13:55,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:55,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:55,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:55,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:55,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:55,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:55,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 137 transitions, 1370 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:55,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:55,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:55,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:55,802 INFO L124 PetriNetUnfolderBase]: 392/694 cut-off events. [2024-06-21 19:13:55,802 INFO L125 PetriNetUnfolderBase]: For 27211/27211 co-relation queries the response was YES. [2024-06-21 19:13:55,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4609 conditions, 694 events. 392/694 cut-off events. For 27211/27211 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2990 event pairs, 86 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 4532. Up to 627 conditions per place. [2024-06-21 19:13:55,806 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 118 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-21 19:13:55,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 147 transitions, 1706 flow [2024-06-21 19:13:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 19:13:55,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 19:13:55,808 INFO L175 Difference]: Start difference. First operand has 148 places, 137 transitions, 1370 flow. Second operand 8 states and 95 transitions. [2024-06-21 19:13:55,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 147 transitions, 1706 flow [2024-06-21 19:13:55,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 147 transitions, 1635 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:55,849 INFO L231 Difference]: Finished difference. Result has 150 places, 139 transitions, 1388 flow [2024-06-21 19:13:55,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1388, PETRI_PLACES=150, PETRI_TRANSITIONS=139} [2024-06-21 19:13:55,849 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-21 19:13:55,849 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 139 transitions, 1388 flow [2024-06-21 19:13:55,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:55,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:55,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:55,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:13:55,850 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 19:13:55,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:55,850 INFO L85 PathProgramCache]: Analyzing trace with hash -630792831, now seen corresponding path program 1 times [2024-06-21 19:13:55,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:55,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973896492] [2024-06-21 19:13:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:55,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:56,996 INFO 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 19:13:56,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:56,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973896492] [2024-06-21 19:13:56,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973896492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:56,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:56,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:13:56,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811073181] [2024-06-21 19:13:56,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:56,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:13:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:56,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:13:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:13:57,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:57,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 139 transitions, 1388 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 19:13:57,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:57,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:57,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:57,437 INFO L124 PetriNetUnfolderBase]: 398/703 cut-off events. [2024-06-21 19:13:57,438 INFO L125 PetriNetUnfolderBase]: For 29511/29511 co-relation queries the response was YES. [2024-06-21 19:13:57,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4705 conditions, 703 events. 398/703 cut-off events. For 29511/29511 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3039 event pairs, 79 based on Foata normal form. 2/703 useless extension candidates. Maximal degree in co-relation 4627. Up to 670 conditions per place. [2024-06-21 19:13:57,442 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 133 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-06-21 19:13:57,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 151 transitions, 1738 flow [2024-06-21 19:13:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:13:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:13:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 19:13:57,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 19:13:57,443 INFO L175 Difference]: Start difference. First operand has 150 places, 139 transitions, 1388 flow. Second operand 10 states and 105 transitions. [2024-06-21 19:13:57,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 151 transitions, 1738 flow [2024-06-21 19:13:57,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 151 transitions, 1669 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 19:13:57,488 INFO L231 Difference]: Finished difference. Result has 154 places, 141 transitions, 1390 flow [2024-06-21 19:13:57,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1390, PETRI_PLACES=154, PETRI_TRANSITIONS=141} [2024-06-21 19:13:57,488 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-21 19:13:57,488 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 141 transitions, 1390 flow [2024-06-21 19:13:57,489 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 19:13:57,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:57,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:57,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:13:57,490 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 19:13:57,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1608916701, now seen corresponding path program 4 times [2024-06-21 19:13:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302757488] [2024-06-21 19:13:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:13:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:58,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302757488] [2024-06-21 19:13:58,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302757488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:58,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:58,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:58,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103527862] [2024-06-21 19:13:58,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:58,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:58,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:58,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:58,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 141 transitions, 1390 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:58,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:58,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:58,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:13:58,657 INFO L124 PetriNetUnfolderBase]: 407/718 cut-off events. [2024-06-21 19:13:58,657 INFO L125 PetriNetUnfolderBase]: For 31892/31892 co-relation queries the response was YES. [2024-06-21 19:13:58,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4803 conditions, 718 events. 407/718 cut-off events. For 31892/31892 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3142 event pairs, 81 based on Foata normal form. 3/719 useless extension candidates. Maximal degree in co-relation 4724. Up to 677 conditions per place. [2024-06-21 19:13:58,662 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 137 selfloop transitions, 16 changer transitions 0/155 dead transitions. [2024-06-21 19:13:58,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 155 transitions, 1762 flow [2024-06-21 19:13:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:13:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:13:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-21 19:13:58,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:13:58,663 INFO L175 Difference]: Start difference. First operand has 154 places, 141 transitions, 1390 flow. Second operand 8 states and 93 transitions. [2024-06-21 19:13:58,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 155 transitions, 1762 flow [2024-06-21 19:13:58,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 155 transitions, 1682 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 19:13:58,711 INFO L231 Difference]: Finished difference. Result has 153 places, 144 transitions, 1390 flow [2024-06-21 19:13:58,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1390, PETRI_PLACES=153, PETRI_TRANSITIONS=144} [2024-06-21 19:13:58,712 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-21 19:13:58,712 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 144 transitions, 1390 flow [2024-06-21 19:13:58,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:58,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:13:58,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:13:58,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:13:58,712 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 19:13:58,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:13:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash -639370655, now seen corresponding path program 7 times [2024-06-21 19:13:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:13:58,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755858664] [2024-06-21 19:13:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:13:58,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:13:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:13:59,815 INFO 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 19:13:59,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:13:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755858664] [2024-06-21 19:13:59,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755858664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:13:59,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:13:59,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:13:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040403472] [2024-06-21 19:13:59,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:13:59,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:13:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:13:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:13:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:13:59,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:13:59,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 144 transitions, 1390 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:13:59,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:13:59,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:13:59,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:00,079 INFO L124 PetriNetUnfolderBase]: 405/715 cut-off events. [2024-06-21 19:14:00,079 INFO L125 PetriNetUnfolderBase]: For 31304/31304 co-relation queries the response was YES. [2024-06-21 19:14:00,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4732 conditions, 715 events. 405/715 cut-off events. For 31304/31304 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3106 event pairs, 85 based on Foata normal form. 1/714 useless extension candidates. Maximal degree in co-relation 4654. Up to 690 conditions per place. [2024-06-21 19:14:00,084 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 134 selfloop transitions, 15 changer transitions 0/151 dead transitions. [2024-06-21 19:14:00,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 151 transitions, 1704 flow [2024-06-21 19:14:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 19:14:00,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-21 19:14:00,085 INFO L175 Difference]: Start difference. First operand has 153 places, 144 transitions, 1390 flow. Second operand 8 states and 89 transitions. [2024-06-21 19:14:00,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 151 transitions, 1704 flow [2024-06-21 19:14:00,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 151 transitions, 1640 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:00,129 INFO L231 Difference]: Finished difference. Result has 154 places, 144 transitions, 1361 flow [2024-06-21 19:14:00,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1361, PETRI_PLACES=154, PETRI_TRANSITIONS=144} [2024-06-21 19:14:00,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-21 19:14:00,130 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 144 transitions, 1361 flow [2024-06-21 19:14:00,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:00,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:00,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:00,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:14:00,131 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 19:14:00,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:00,131 INFO L85 PathProgramCache]: Analyzing trace with hash 105027333, now seen corresponding path program 5 times [2024-06-21 19:14:00,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:00,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936561487] [2024-06-21 19:14:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:00,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:01,159 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 19:14:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:01,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936561487] [2024-06-21 19:14:01,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936561487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:01,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:01,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:01,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625748199] [2024-06-21 19:14:01,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:01,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:01,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:01,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:01,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:01,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:01,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 144 transitions, 1361 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:01,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:01,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:01,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:01,448 INFO L124 PetriNetUnfolderBase]: 414/730 cut-off events. [2024-06-21 19:14:01,449 INFO L125 PetriNetUnfolderBase]: For 34449/34449 co-relation queries the response was YES. [2024-06-21 19:14:01,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4795 conditions, 730 events. 414/730 cut-off events. For 34449/34449 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3195 event pairs, 79 based on Foata normal form. 3/731 useless extension candidates. Maximal degree in co-relation 4718. Up to 647 conditions per place. [2024-06-21 19:14:01,453 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 133 selfloop transitions, 26 changer transitions 0/161 dead transitions. [2024-06-21 19:14:01,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 161 transitions, 1844 flow [2024-06-21 19:14:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:01,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 19:14:01,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919354838709675 [2024-06-21 19:14:01,454 INFO L175 Difference]: Start difference. First operand has 154 places, 144 transitions, 1361 flow. Second operand 8 states and 99 transitions. [2024-06-21 19:14:01,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 161 transitions, 1844 flow [2024-06-21 19:14:01,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 161 transitions, 1805 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:01,508 INFO L231 Difference]: Finished difference. Result has 156 places, 147 transitions, 1422 flow [2024-06-21 19:14:01,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1422, PETRI_PLACES=156, PETRI_TRANSITIONS=147} [2024-06-21 19:14:01,508 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2024-06-21 19:14:01,508 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 147 transitions, 1422 flow [2024-06-21 19:14:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:01,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:01,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:01,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:14:01,509 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 19:14:01,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:01,509 INFO L85 PathProgramCache]: Analyzing trace with hash -639363959, now seen corresponding path program 6 times [2024-06-21 19:14:01,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:01,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693227240] [2024-06-21 19:14:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:01,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:02,509 INFO 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 19:14:02,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:02,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693227240] [2024-06-21 19:14:02,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693227240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:02,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:02,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:02,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550818913] [2024-06-21 19:14:02,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:02,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:02,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:02,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:02,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 147 transitions, 1422 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:02,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:02,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:02,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:02,856 INFO L124 PetriNetUnfolderBase]: 421/742 cut-off events. [2024-06-21 19:14:02,856 INFO L125 PetriNetUnfolderBase]: For 35191/35191 co-relation queries the response was YES. [2024-06-21 19:14:02,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4858 conditions, 742 events. 421/742 cut-off events. For 35191/35191 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3252 event pairs, 82 based on Foata normal form. 3/743 useless extension candidates. Maximal degree in co-relation 4780. Up to 644 conditions per place. [2024-06-21 19:14:02,861 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 136 selfloop transitions, 29 changer transitions 0/167 dead transitions. [2024-06-21 19:14:02,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 167 transitions, 1911 flow [2024-06-21 19:14:02,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 19:14:02,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-21 19:14:02,862 INFO L175 Difference]: Start difference. First operand has 156 places, 147 transitions, 1422 flow. Second operand 8 states and 101 transitions. [2024-06-21 19:14:02,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 167 transitions, 1911 flow [2024-06-21 19:14:02,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 167 transitions, 1789 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:02,916 INFO L231 Difference]: Finished difference. Result has 159 places, 152 transitions, 1424 flow [2024-06-21 19:14:02,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1424, PETRI_PLACES=159, PETRI_TRANSITIONS=152} [2024-06-21 19:14:02,917 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 129 predicate places. [2024-06-21 19:14:02,917 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 152 transitions, 1424 flow [2024-06-21 19:14:02,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:02,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:02,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:02,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:14:02,917 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 19:14:02,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1687578489, now seen corresponding path program 4 times [2024-06-21 19:14:02,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:02,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079097924] [2024-06-21 19:14:02,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:02,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:04,249 INFO 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 19:14:04,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:04,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079097924] [2024-06-21 19:14:04,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079097924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:04,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:04,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:04,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129916314] [2024-06-21 19:14:04,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:04,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:04,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:04,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:04,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:04,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:14:04,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 152 transitions, 1424 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:04,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:04,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:14:04,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:04,615 INFO L124 PetriNetUnfolderBase]: 409/734 cut-off events. [2024-06-21 19:14:04,615 INFO L125 PetriNetUnfolderBase]: For 35981/35981 co-relation queries the response was YES. [2024-06-21 19:14:04,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4903 conditions, 734 events. 409/734 cut-off events. For 35981/35981 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3299 event pairs, 40 based on Foata normal form. 2/734 useless extension candidates. Maximal degree in co-relation 4821. Up to 508 conditions per place. [2024-06-21 19:14:04,621 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 110 selfloop transitions, 38 changer transitions 0/168 dead transitions. [2024-06-21 19:14:04,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 168 transitions, 1860 flow [2024-06-21 19:14:04,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-21 19:14:04,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 19:14:04,622 INFO L175 Difference]: Start difference. First operand has 159 places, 152 transitions, 1424 flow. Second operand 8 states and 112 transitions. [2024-06-21 19:14:04,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 168 transitions, 1860 flow [2024-06-21 19:14:04,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 168 transitions, 1803 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:04,691 INFO L231 Difference]: Finished difference. Result has 162 places, 153 transitions, 1461 flow [2024-06-21 19:14:04,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1461, PETRI_PLACES=162, PETRI_TRANSITIONS=153} [2024-06-21 19:14:04,692 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2024-06-21 19:14:04,692 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 153 transitions, 1461 flow [2024-06-21 19:14:04,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:04,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:04,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:04,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:14:04,692 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 19:14:04,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash -667753191, now seen corresponding path program 8 times [2024-06-21 19:14:04,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234132355] [2024-06-21 19:14:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:04,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:05,848 INFO 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 19:14:05,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:05,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234132355] [2024-06-21 19:14:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234132355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:05,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:05,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175801569] [2024-06-21 19:14:05,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:05,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:05,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:05,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:14:05,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 153 transitions, 1461 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:05,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:05,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:14:05,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:06,130 INFO L124 PetriNetUnfolderBase]: 428/755 cut-off events. [2024-06-21 19:14:06,131 INFO L125 PetriNetUnfolderBase]: For 36315/36315 co-relation queries the response was YES. [2024-06-21 19:14:06,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5070 conditions, 755 events. 428/755 cut-off events. For 36315/36315 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3346 event pairs, 67 based on Foata normal form. 1/754 useless extension candidates. Maximal degree in co-relation 4986. Up to 581 conditions per place. [2024-06-21 19:14:06,138 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 112 selfloop transitions, 56 changer transitions 0/170 dead transitions. [2024-06-21 19:14:06,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 170 transitions, 1955 flow [2024-06-21 19:14:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-06-21 19:14:06,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4700460829493088 [2024-06-21 19:14:06,140 INFO L175 Difference]: Start difference. First operand has 162 places, 153 transitions, 1461 flow. Second operand 7 states and 102 transitions. [2024-06-21 19:14:06,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 170 transitions, 1955 flow [2024-06-21 19:14:06,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 170 transitions, 1878 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:06,233 INFO L231 Difference]: Finished difference. Result has 163 places, 157 transitions, 1542 flow [2024-06-21 19:14:06,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1542, PETRI_PLACES=163, PETRI_TRANSITIONS=157} [2024-06-21 19:14:06,233 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 19:14:06,234 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 157 transitions, 1542 flow [2024-06-21 19:14:06,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:06,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:06,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:06,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:14:06,234 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 19:14:06,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:06,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1529309035, now seen corresponding path program 5 times [2024-06-21 19:14:06,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:06,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361630142] [2024-06-21 19:14:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:06,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:07,757 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 19:14:07,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:07,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361630142] [2024-06-21 19:14:07,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361630142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:07,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:07,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:07,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717540482] [2024-06-21 19:14:07,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:07,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:07,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:07,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:14:07,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 157 transitions, 1542 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 19:14:07,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:07,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:14:07,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:08,048 INFO L124 PetriNetUnfolderBase]: 416/747 cut-off events. [2024-06-21 19:14:08,048 INFO L125 PetriNetUnfolderBase]: For 37712/37712 co-relation queries the response was YES. [2024-06-21 19:14:08,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 747 events. 416/747 cut-off events. For 37712/37712 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3388 event pairs, 60 based on Foata normal form. 2/747 useless extension candidates. Maximal degree in co-relation 4978. Up to 586 conditions per place. [2024-06-21 19:14:08,053 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 116 selfloop transitions, 33 changer transitions 0/171 dead transitions. [2024-06-21 19:14:08,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 171 transitions, 1885 flow [2024-06-21 19:14:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-21 19:14:08,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 19:14:08,054 INFO L175 Difference]: Start difference. First operand has 163 places, 157 transitions, 1542 flow. Second operand 8 states and 112 transitions. [2024-06-21 19:14:08,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 171 transitions, 1885 flow [2024-06-21 19:14:08,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 171 transitions, 1809 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:08,112 INFO L231 Difference]: Finished difference. Result has 166 places, 158 transitions, 1549 flow [2024-06-21 19:14:08,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1549, PETRI_PLACES=166, PETRI_TRANSITIONS=158} [2024-06-21 19:14:08,112 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-21 19:14:08,112 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 158 transitions, 1549 flow [2024-06-21 19:14:08,113 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 19:14:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:08,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:08,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:14:08,113 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 19:14:08,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:08,113 INFO L85 PathProgramCache]: Analyzing trace with hash -639033861, now seen corresponding path program 9 times [2024-06-21 19:14:08,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:08,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207226164] [2024-06-21 19:14:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:08,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:09,273 INFO 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 19:14:09,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:09,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207226164] [2024-06-21 19:14:09,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207226164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:09,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:09,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:09,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109689269] [2024-06-21 19:14:09,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:09,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:09,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:09,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:14:09,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 158 transitions, 1549 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:09,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:09,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:14:09,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:09,618 INFO L124 PetriNetUnfolderBase]: 435/768 cut-off events. [2024-06-21 19:14:09,618 INFO L125 PetriNetUnfolderBase]: For 36324/36324 co-relation queries the response was YES. [2024-06-21 19:14:09,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5153 conditions, 768 events. 435/768 cut-off events. For 36324/36324 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3417 event pairs, 63 based on Foata normal form. 1/767 useless extension candidates. Maximal degree in co-relation 5069. Up to 659 conditions per place. [2024-06-21 19:14:09,622 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 123 selfloop transitions, 44 changer transitions 0/169 dead transitions. [2024-06-21 19:14:09,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 169 transitions, 1923 flow [2024-06-21 19:14:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:09,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 19:14:09,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 19:14:09,623 INFO L175 Difference]: Start difference. First operand has 166 places, 158 transitions, 1549 flow. Second operand 8 states and 105 transitions. [2024-06-21 19:14:09,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 169 transitions, 1923 flow [2024-06-21 19:14:09,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 169 transitions, 1853 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:09,682 INFO L231 Difference]: Finished difference. Result has 167 places, 160 transitions, 1597 flow [2024-06-21 19:14:09,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1597, PETRI_PLACES=167, PETRI_TRANSITIONS=160} [2024-06-21 19:14:09,683 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-21 19:14:09,683 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 160 transitions, 1597 flow [2024-06-21 19:14:09,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:09,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:09,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:09,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:14:09,683 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 19:14:09,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:09,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1526512401, now seen corresponding path program 10 times [2024-06-21 19:14:09,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:09,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193919391] [2024-06-21 19:14:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:09,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:10,923 INFO 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 19:14:10,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:10,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193919391] [2024-06-21 19:14:10,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193919391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:10,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:10,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484164212] [2024-06-21 19:14:10,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:10,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:10,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:14:10,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 160 transitions, 1597 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:10,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:10,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:14:10,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:11,244 INFO L124 PetriNetUnfolderBase]: 438/773 cut-off events. [2024-06-21 19:14:11,244 INFO L125 PetriNetUnfolderBase]: For 36371/36371 co-relation queries the response was YES. [2024-06-21 19:14:11,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5201 conditions, 773 events. 438/773 cut-off events. For 36371/36371 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3451 event pairs, 63 based on Foata normal form. 1/772 useless extension candidates. Maximal degree in co-relation 5117. Up to 652 conditions per place. [2024-06-21 19:14:11,250 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 119 selfloop transitions, 50 changer transitions 0/171 dead transitions. [2024-06-21 19:14:11,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 171 transitions, 1979 flow [2024-06-21 19:14:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 19:14:11,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 19:14:11,251 INFO L175 Difference]: Start difference. First operand has 167 places, 160 transitions, 1597 flow. Second operand 8 states and 106 transitions. [2024-06-21 19:14:11,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 171 transitions, 1979 flow [2024-06-21 19:14:11,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 171 transitions, 1886 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:11,319 INFO L231 Difference]: Finished difference. Result has 168 places, 162 transitions, 1638 flow [2024-06-21 19:14:11,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1638, PETRI_PLACES=168, PETRI_TRANSITIONS=162} [2024-06-21 19:14:11,319 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2024-06-21 19:14:11,319 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 162 transitions, 1638 flow [2024-06-21 19:14:11,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:11,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:11,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:11,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:14:11,320 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 19:14:11,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash -667637995, now seen corresponding path program 6 times [2024-06-21 19:14:11,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:11,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306530245] [2024-06-21 19:14:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:11,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:12,626 INFO 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 19:14:12,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:12,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306530245] [2024-06-21 19:14:12,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306530245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:12,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:12,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:12,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184601137] [2024-06-21 19:14:12,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:12,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:12,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:12,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:12,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:14:12,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 162 transitions, 1638 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:12,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:12,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:14:12,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:12,967 INFO L124 PetriNetUnfolderBase]: 419/752 cut-off events. [2024-06-21 19:14:12,968 INFO L125 PetriNetUnfolderBase]: For 35663/35663 co-relation queries the response was YES. [2024-06-21 19:14:12,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5024 conditions, 752 events. 419/752 cut-off events. For 35663/35663 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3405 event pairs, 57 based on Foata normal form. 2/752 useless extension candidates. Maximal degree in co-relation 4940. Up to 616 conditions per place. [2024-06-21 19:14:12,973 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 118 selfloop transitions, 30 changer transitions 0/172 dead transitions. [2024-06-21 19:14:12,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 172 transitions, 1958 flow [2024-06-21 19:14:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2024-06-21 19:14:12,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43951612903225806 [2024-06-21 19:14:12,975 INFO L175 Difference]: Start difference. First operand has 168 places, 162 transitions, 1638 flow. Second operand 8 states and 109 transitions. [2024-06-21 19:14:12,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 172 transitions, 1958 flow [2024-06-21 19:14:13,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 172 transitions, 1847 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:13,035 INFO L231 Difference]: Finished difference. Result has 169 places, 162 transitions, 1593 flow [2024-06-21 19:14:13,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1593, PETRI_PLACES=169, PETRI_TRANSITIONS=162} [2024-06-21 19:14:13,035 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-21 19:14:13,036 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 162 transitions, 1593 flow [2024-06-21 19:14:13,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:13,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:13,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:13,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:14:13,036 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 19:14:13,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1761776999, now seen corresponding path program 11 times [2024-06-21 19:14:13,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:13,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252582046] [2024-06-21 19:14:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:14,276 INFO 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 19:14:14,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252582046] [2024-06-21 19:14:14,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252582046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:14,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:14,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561485619] [2024-06-21 19:14:14,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:14,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:14,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:14,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:14,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:14:14,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 162 transitions, 1593 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:14,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:14,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:14:14,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:14,628 INFO L124 PetriNetUnfolderBase]: 438/774 cut-off events. [2024-06-21 19:14:14,628 INFO L125 PetriNetUnfolderBase]: For 34314/34314 co-relation queries the response was YES. [2024-06-21 19:14:14,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5100 conditions, 774 events. 438/774 cut-off events. For 34314/34314 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3465 event pairs, 60 based on Foata normal form. 1/773 useless extension candidates. Maximal degree in co-relation 5016. Up to 626 conditions per place. [2024-06-21 19:14:14,634 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 118 selfloop transitions, 60 changer transitions 0/180 dead transitions. [2024-06-21 19:14:14,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 180 transitions, 2117 flow [2024-06-21 19:14:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:14,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-21 19:14:14,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596774193548387 [2024-06-21 19:14:14,635 INFO L175 Difference]: Start difference. First operand has 169 places, 162 transitions, 1593 flow. Second operand 8 states and 114 transitions. [2024-06-21 19:14:14,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 180 transitions, 2117 flow [2024-06-21 19:14:14,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 180 transitions, 2037 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:14:14,699 INFO L231 Difference]: Finished difference. Result has 169 places, 164 transitions, 1669 flow [2024-06-21 19:14:14,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1669, PETRI_PLACES=169, PETRI_TRANSITIONS=164} [2024-06-21 19:14:14,700 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-21 19:14:14,700 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 164 transitions, 1669 flow [2024-06-21 19:14:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:14,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:14,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:14,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:14:14,700 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 19:14:14,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:14,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1785902873, now seen corresponding path program 7 times [2024-06-21 19:14:14,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:14,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345647328] [2024-06-21 19:14:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:14,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:16,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:16,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345647328] [2024-06-21 19:14:16,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345647328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:16,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:16,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:16,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473343500] [2024-06-21 19:14:16,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:16,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:16,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:16,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:16,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 164 transitions, 1669 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:16,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:16,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:16,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:16,601 INFO L124 PetriNetUnfolderBase]: 441/778 cut-off events. [2024-06-21 19:14:16,601 INFO L125 PetriNetUnfolderBase]: For 34238/34238 co-relation queries the response was YES. [2024-06-21 19:14:16,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5163 conditions, 778 events. 441/778 cut-off events. For 34238/34238 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3492 event pairs, 52 based on Foata normal form. 1/777 useless extension candidates. Maximal degree in co-relation 5079. Up to 622 conditions per place. [2024-06-21 19:14:16,606 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 139 selfloop transitions, 42 changer transitions 0/183 dead transitions. [2024-06-21 19:14:16,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 183 transitions, 2189 flow [2024-06-21 19:14:16,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-21 19:14:16,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2024-06-21 19:14:16,608 INFO L175 Difference]: Start difference. First operand has 169 places, 164 transitions, 1669 flow. Second operand 8 states and 110 transitions. [2024-06-21 19:14:16,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 183 transitions, 2189 flow [2024-06-21 19:14:16,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 183 transitions, 2038 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:16,673 INFO L231 Difference]: Finished difference. Result has 170 places, 166 transitions, 1619 flow [2024-06-21 19:14:16,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1619, PETRI_PLACES=170, PETRI_TRANSITIONS=166} [2024-06-21 19:14:16,674 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-21 19:14:16,674 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 166 transitions, 1619 flow [2024-06-21 19:14:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:16,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:16,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:16,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:14:16,675 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 19:14:16,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:16,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1785730079, now seen corresponding path program 12 times [2024-06-21 19:14:16,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:16,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857011155] [2024-06-21 19:14:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:16,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:17,827 INFO 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 19:14:17,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:17,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857011155] [2024-06-21 19:14:17,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857011155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:17,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:17,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:17,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441893802] [2024-06-21 19:14:17,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:17,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:17,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:17,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:14:17,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 166 transitions, 1619 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:17,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:17,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:14:17,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:18,156 INFO L124 PetriNetUnfolderBase]: 444/783 cut-off events. [2024-06-21 19:14:18,156 INFO L125 PetriNetUnfolderBase]: For 34322/34322 co-relation queries the response was YES. [2024-06-21 19:14:18,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5151 conditions, 783 events. 444/783 cut-off events. For 34322/34322 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3506 event pairs, 62 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 5068. Up to 674 conditions per place. [2024-06-21 19:14:18,162 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 134 selfloop transitions, 41 changer transitions 0/177 dead transitions. [2024-06-21 19:14:18,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 177 transitions, 2017 flow [2024-06-21 19:14:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 19:14:18,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:14:18,164 INFO L175 Difference]: Start difference. First operand has 170 places, 166 transitions, 1619 flow. Second operand 8 states and 104 transitions. [2024-06-21 19:14:18,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 177 transitions, 2017 flow [2024-06-21 19:14:18,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 177 transitions, 1929 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:18,222 INFO L231 Difference]: Finished difference. Result has 172 places, 168 transitions, 1651 flow [2024-06-21 19:14:18,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1651, PETRI_PLACES=172, PETRI_TRANSITIONS=168} [2024-06-21 19:14:18,223 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-21 19:14:18,223 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 168 transitions, 1651 flow [2024-06-21 19:14:18,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:18,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:18,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:18,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:14:18,223 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 19:14:18,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:18,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1785903059, now seen corresponding path program 13 times [2024-06-21 19:14:18,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:18,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506839604] [2024-06-21 19:14:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:18,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:19,423 INFO 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 19:14:19,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:19,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506839604] [2024-06-21 19:14:19,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506839604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:19,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:19,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:19,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668057160] [2024-06-21 19:14:19,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:19,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:19,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:19,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:19,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:14:19,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 168 transitions, 1651 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:19,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:19,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:14:19,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:19,764 INFO L124 PetriNetUnfolderBase]: 442/783 cut-off events. [2024-06-21 19:14:19,764 INFO L125 PetriNetUnfolderBase]: For 34639/34639 co-relation queries the response was YES. [2024-06-21 19:14:19,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5116 conditions, 783 events. 442/783 cut-off events. For 34639/34639 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3532 event pairs, 72 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 5031. Up to 671 conditions per place. [2024-06-21 19:14:19,770 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 130 selfloop transitions, 48 changer transitions 0/180 dead transitions. [2024-06-21 19:14:19,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 180 transitions, 2044 flow [2024-06-21 19:14:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-21 19:14:19,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 19:14:19,771 INFO L175 Difference]: Start difference. First operand has 172 places, 168 transitions, 1651 flow. Second operand 8 states and 108 transitions. [2024-06-21 19:14:19,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 180 transitions, 2044 flow [2024-06-21 19:14:19,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 180 transitions, 1939 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:19,837 INFO L231 Difference]: Finished difference. Result has 173 places, 168 transitions, 1650 flow [2024-06-21 19:14:19,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1650, PETRI_PLACES=173, PETRI_TRANSITIONS=168} [2024-06-21 19:14:19,838 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-06-21 19:14:19,838 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 168 transitions, 1650 flow [2024-06-21 19:14:19,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:19,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:19,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:19,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:14:19,838 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 19:14:19,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:19,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1785723383, now seen corresponding path program 8 times [2024-06-21 19:14:19,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:19,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655341554] [2024-06-21 19:14:19,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:19,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:21,288 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 19:14:21,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:21,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655341554] [2024-06-21 19:14:21,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655341554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:21,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:21,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:21,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241618655] [2024-06-21 19:14:21,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:21,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:21,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:21,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:21,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 168 transitions, 1650 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:21,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:21,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:21,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:21,798 INFO L124 PetriNetUnfolderBase]: 445/785 cut-off events. [2024-06-21 19:14:21,798 INFO L125 PetriNetUnfolderBase]: For 34564/34564 co-relation queries the response was YES. [2024-06-21 19:14:21,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5125 conditions, 785 events. 445/785 cut-off events. For 34564/34564 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3521 event pairs, 51 based on Foata normal form. 1/784 useless extension candidates. Maximal degree in co-relation 5040. Up to 628 conditions per place. [2024-06-21 19:14:21,803 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 141 selfloop transitions, 43 changer transitions 0/186 dead transitions. [2024-06-21 19:14:21,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 186 transitions, 2174 flow [2024-06-21 19:14:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 19:14:21,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 19:14:21,804 INFO L175 Difference]: Start difference. First operand has 173 places, 168 transitions, 1650 flow. Second operand 8 states and 106 transitions. [2024-06-21 19:14:21,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 186 transitions, 2174 flow [2024-06-21 19:14:21,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 186 transitions, 2025 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 19:14:21,864 INFO L231 Difference]: Finished difference. Result has 172 places, 170 transitions, 1604 flow [2024-06-21 19:14:21,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1604, PETRI_PLACES=172, PETRI_TRANSITIONS=170} [2024-06-21 19:14:21,865 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-21 19:14:21,865 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 170 transitions, 1604 flow [2024-06-21 19:14:21,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:21,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:21,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:21,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:14:21,865 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 19:14:21,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:21,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1785729893, now seen corresponding path program 9 times [2024-06-21 19:14:21,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:21,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703782067] [2024-06-21 19:14:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:21,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:23,297 INFO 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 19:14:23,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:23,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703782067] [2024-06-21 19:14:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703782067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:23,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:23,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:23,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145354196] [2024-06-21 19:14:23,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:23,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:23,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:23,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:23,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:23,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:23,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 170 transitions, 1604 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:23,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:23,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:23,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:23,832 INFO L124 PetriNetUnfolderBase]: 443/783 cut-off events. [2024-06-21 19:14:23,832 INFO L125 PetriNetUnfolderBase]: For 33593/33593 co-relation queries the response was YES. [2024-06-21 19:14:23,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 783 events. 443/783 cut-off events. For 33593/33593 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3530 event pairs, 51 based on Foata normal form. 1/782 useless extension candidates. Maximal degree in co-relation 4921. Up to 626 conditions per place. [2024-06-21 19:14:23,837 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 141 selfloop transitions, 42 changer transitions 0/185 dead transitions. [2024-06-21 19:14:23,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 185 transitions, 2022 flow [2024-06-21 19:14:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 19:14:23,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 19:14:23,838 INFO L175 Difference]: Start difference. First operand has 172 places, 170 transitions, 1604 flow. Second operand 8 states and 106 transitions. [2024-06-21 19:14:23,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 185 transitions, 2022 flow [2024-06-21 19:14:23,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 185 transitions, 1945 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:23,896 INFO L231 Difference]: Finished difference. Result has 175 places, 170 transitions, 1616 flow [2024-06-21 19:14:23,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1616, PETRI_PLACES=175, PETRI_TRANSITIONS=170} [2024-06-21 19:14:23,896 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-06-21 19:14:23,896 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 170 transitions, 1616 flow [2024-06-21 19:14:23,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:23,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:23,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:23,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:14:23,897 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 19:14:23,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1785723135, now seen corresponding path program 2 times [2024-06-21 19:14:23,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:23,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990199998] [2024-06-21 19:14:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:23,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:25,266 INFO 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 19:14:25,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:25,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990199998] [2024-06-21 19:14:25,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990199998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:25,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:25,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:25,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674431412] [2024-06-21 19:14:25,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:25,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:25,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:25,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:25,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:25,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:25,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 170 transitions, 1616 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 19:14:25,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:25,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:25,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:26,021 INFO L124 PetriNetUnfolderBase]: 451/797 cut-off events. [2024-06-21 19:14:26,021 INFO L125 PetriNetUnfolderBase]: For 37464/37464 co-relation queries the response was YES. [2024-06-21 19:14:26,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5050 conditions, 797 events. 451/797 cut-off events. For 37464/37464 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3588 event pairs, 58 based on Foata normal form. 4/799 useless extension candidates. Maximal degree in co-relation 4966. Up to 560 conditions per place. [2024-06-21 19:14:26,027 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 147 selfloop transitions, 63 changer transitions 0/212 dead transitions. [2024-06-21 19:14:26,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 212 transitions, 2581 flow [2024-06-21 19:14:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:14:26,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:14:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 19:14:26,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 19:14:26,028 INFO L175 Difference]: Start difference. First operand has 175 places, 170 transitions, 1616 flow. Second operand 11 states and 145 transitions. [2024-06-21 19:14:26,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 212 transitions, 2581 flow [2024-06-21 19:14:26,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 212 transitions, 2478 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 19:14:26,093 INFO L231 Difference]: Finished difference. Result has 181 places, 191 transitions, 2003 flow [2024-06-21 19:14:26,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2003, PETRI_PLACES=181, PETRI_TRANSITIONS=191} [2024-06-21 19:14:26,093 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-21 19:14:26,093 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 191 transitions, 2003 flow [2024-06-21 19:14:26,093 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 19:14:26,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:26,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:26,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:14:26,094 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 19:14:26,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:26,094 INFO L85 PathProgramCache]: Analyzing trace with hash -630781919, now seen corresponding path program 1 times [2024-06-21 19:14:26,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:26,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274958691] [2024-06-21 19:14:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:26,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:28,266 INFO 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 19:14:28,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:28,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274958691] [2024-06-21 19:14:28,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274958691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:28,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:28,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:28,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251525039] [2024-06-21 19:14:28,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:28,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:28,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:28,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 191 transitions, 2003 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 19:14:28,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:28,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:28,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:28,855 INFO L124 PetriNetUnfolderBase]: 448/791 cut-off events. [2024-06-21 19:14:28,856 INFO L125 PetriNetUnfolderBase]: For 37216/37216 co-relation queries the response was YES. [2024-06-21 19:14:28,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5211 conditions, 791 events. 448/791 cut-off events. For 37216/37216 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3542 event pairs, 96 based on Foata normal form. 2/791 useless extension candidates. Maximal degree in co-relation 5123. Up to 760 conditions per place. [2024-06-21 19:14:28,861 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 182 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2024-06-21 19:14:28,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 200 transitions, 2419 flow [2024-06-21 19:14:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-21 19:14:28,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225806451612905 [2024-06-21 19:14:28,862 INFO L175 Difference]: Start difference. First operand has 181 places, 191 transitions, 2003 flow. Second operand 10 states and 103 transitions. [2024-06-21 19:14:28,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 200 transitions, 2419 flow [2024-06-21 19:14:28,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 200 transitions, 2168 flow, removed 106 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:28,929 INFO L231 Difference]: Finished difference. Result has 186 places, 191 transitions, 1788 flow [2024-06-21 19:14:28,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1788, PETRI_PLACES=186, PETRI_TRANSITIONS=191} [2024-06-21 19:14:28,929 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 156 predicate places. [2024-06-21 19:14:28,929 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 191 transitions, 1788 flow [2024-06-21 19:14:28,930 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 19:14:28,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:28,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:28,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:14:28,930 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 19:14:28,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash 345732563, now seen corresponding path program 1 times [2024-06-21 19:14:28,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:28,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811359703] [2024-06-21 19:14:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:28,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:30,398 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 19:14:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:30,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811359703] [2024-06-21 19:14:30,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811359703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:30,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:30,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:30,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176593326] [2024-06-21 19:14:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:30,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:30,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:30,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:30,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:30,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 191 transitions, 1788 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 19:14:30,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:30,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:30,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:30,798 INFO L124 PetriNetUnfolderBase]: 459/813 cut-off events. [2024-06-21 19:14:30,799 INFO L125 PetriNetUnfolderBase]: For 39368/39368 co-relation queries the response was YES. [2024-06-21 19:14:30,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5190 conditions, 813 events. 459/813 cut-off events. For 39368/39368 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3695 event pairs, 95 based on Foata normal form. 2/813 useless extension candidates. Maximal degree in co-relation 5100. Up to 637 conditions per place. [2024-06-21 19:14:30,804 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 165 selfloop transitions, 41 changer transitions 0/208 dead transitions. [2024-06-21 19:14:30,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 208 transitions, 2356 flow [2024-06-21 19:14:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:30,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 19:14:30,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 19:14:30,805 INFO L175 Difference]: Start difference. First operand has 186 places, 191 transitions, 1788 flow. Second operand 10 states and 116 transitions. [2024-06-21 19:14:30,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 208 transitions, 2356 flow [2024-06-21 19:14:30,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 208 transitions, 2313 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:14:30,889 INFO L231 Difference]: Finished difference. Result has 187 places, 193 transitions, 1849 flow [2024-06-21 19:14:30,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1849, PETRI_PLACES=187, PETRI_TRANSITIONS=193} [2024-06-21 19:14:30,890 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2024-06-21 19:14:30,890 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 193 transitions, 1849 flow [2024-06-21 19:14:30,890 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 19:14:30,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:30,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:30,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:14:30,890 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 19:14:30,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:30,891 INFO L85 PathProgramCache]: Analyzing trace with hash -436672820, now seen corresponding path program 1 times [2024-06-21 19:14:30,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:30,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089964063] [2024-06-21 19:14:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:30,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:32,320 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 19:14:32,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:32,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089964063] [2024-06-21 19:14:32,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089964063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:32,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:32,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:32,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199884442] [2024-06-21 19:14:32,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:32,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:32,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:32,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:32,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:32,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:32,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 193 transitions, 1849 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 19:14:32,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:32,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:32,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:32,726 INFO L124 PetriNetUnfolderBase]: 467/826 cut-off events. [2024-06-21 19:14:32,727 INFO L125 PetriNetUnfolderBase]: For 40824/40824 co-relation queries the response was YES. [2024-06-21 19:14:32,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5363 conditions, 826 events. 467/826 cut-off events. For 40824/40824 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3787 event pairs, 90 based on Foata normal form. 1/825 useless extension candidates. Maximal degree in co-relation 5273. Up to 658 conditions per place. [2024-06-21 19:14:32,733 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 170 selfloop transitions, 40 changer transitions 0/212 dead transitions. [2024-06-21 19:14:32,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 212 transitions, 2445 flow [2024-06-21 19:14:32,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:32,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 19:14:32,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 19:14:32,734 INFO L175 Difference]: Start difference. First operand has 187 places, 193 transitions, 1849 flow. Second operand 10 states and 116 transitions. [2024-06-21 19:14:32,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 212 transitions, 2445 flow [2024-06-21 19:14:32,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 212 transitions, 2385 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:32,809 INFO L231 Difference]: Finished difference. Result has 191 places, 197 transitions, 1898 flow [2024-06-21 19:14:32,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1898, PETRI_PLACES=191, PETRI_TRANSITIONS=197} [2024-06-21 19:14:32,810 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-21 19:14:32,810 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 197 transitions, 1898 flow [2024-06-21 19:14:32,810 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 19:14:32,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:32,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:32,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:14:32,810 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 19:14:32,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:32,810 INFO L85 PathProgramCache]: Analyzing trace with hash 347610233, now seen corresponding path program 2 times [2024-06-21 19:14:32,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:32,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991671855] [2024-06-21 19:14:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:32,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:34,231 INFO 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 19:14:34,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991671855] [2024-06-21 19:14:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991671855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:34,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232377981] [2024-06-21 19:14:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:34,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:34,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:34,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 197 transitions, 1898 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 19:14:34,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:34,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:34,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:34,559 INFO L124 PetriNetUnfolderBase]: 471/834 cut-off events. [2024-06-21 19:14:34,560 INFO L125 PetriNetUnfolderBase]: For 43819/43819 co-relation queries the response was YES. [2024-06-21 19:14:34,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5498 conditions, 834 events. 471/834 cut-off events. For 43819/43819 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3819 event pairs, 103 based on Foata normal form. 2/834 useless extension candidates. Maximal degree in co-relation 5406. Up to 729 conditions per place. [2024-06-21 19:14:34,566 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 167 selfloop transitions, 40 changer transitions 0/209 dead transitions. [2024-06-21 19:14:34,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 209 transitions, 2346 flow [2024-06-21 19:14:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 19:14:34,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-21 19:14:34,573 INFO L175 Difference]: Start difference. First operand has 191 places, 197 transitions, 1898 flow. Second operand 9 states and 106 transitions. [2024-06-21 19:14:34,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 209 transitions, 2346 flow [2024-06-21 19:14:34,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 209 transitions, 2300 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:34,674 INFO L231 Difference]: Finished difference. Result has 194 places, 198 transitions, 1944 flow [2024-06-21 19:14:34,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1944, PETRI_PLACES=194, PETRI_TRANSITIONS=198} [2024-06-21 19:14:34,674 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 164 predicate places. [2024-06-21 19:14:34,675 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 198 transitions, 1944 flow [2024-06-21 19:14:34,675 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 19:14:34,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:34,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:34,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:14:34,675 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 19:14:34,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash -436676695, now seen corresponding path program 3 times [2024-06-21 19:14:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962275999] [2024-06-21 19:14:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:36,142 INFO 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 19:14:36,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:36,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962275999] [2024-06-21 19:14:36,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962275999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:36,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:36,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:36,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199727440] [2024-06-21 19:14:36,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:36,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:36,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:36,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:36,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 198 transitions, 1944 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 19:14:36,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:36,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:36,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:36,526 INFO L124 PetriNetUnfolderBase]: 475/842 cut-off events. [2024-06-21 19:14:36,526 INFO L125 PetriNetUnfolderBase]: For 45392/45392 co-relation queries the response was YES. [2024-06-21 19:14:36,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5627 conditions, 842 events. 475/842 cut-off events. For 45392/45392 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3884 event pairs, 101 based on Foata normal form. 2/842 useless extension candidates. Maximal degree in co-relation 5533. Up to 723 conditions per place. [2024-06-21 19:14:36,532 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 168 selfloop transitions, 41 changer transitions 0/211 dead transitions. [2024-06-21 19:14:36,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 211 transitions, 2400 flow [2024-06-21 19:14:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 19:14:36,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 19:14:36,533 INFO L175 Difference]: Start difference. First operand has 194 places, 198 transitions, 1944 flow. Second operand 10 states and 114 transitions. [2024-06-21 19:14:36,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 211 transitions, 2400 flow [2024-06-21 19:14:36,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 211 transitions, 2320 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:36,614 INFO L231 Difference]: Finished difference. Result has 197 places, 199 transitions, 1960 flow [2024-06-21 19:14:36,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1960, PETRI_PLACES=197, PETRI_TRANSITIONS=199} [2024-06-21 19:14:36,614 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-21 19:14:36,615 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 199 transitions, 1960 flow [2024-06-21 19:14:36,615 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 19:14:36,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:36,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:36,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:14:36,615 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 19:14:36,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:36,615 INFO L85 PathProgramCache]: Analyzing trace with hash -432948170, now seen corresponding path program 2 times [2024-06-21 19:14:36,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:36,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61084386] [2024-06-21 19:14:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:36,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:37,841 INFO 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 19:14:37,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:37,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61084386] [2024-06-21 19:14:37,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61084386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:37,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:37,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:37,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890378823] [2024-06-21 19:14:37,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:37,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:37,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:37,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:37,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:37,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 199 transitions, 1960 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 19:14:37,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:37,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:37,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:38,190 INFO L124 PetriNetUnfolderBase]: 478/847 cut-off events. [2024-06-21 19:14:38,190 INFO L125 PetriNetUnfolderBase]: For 45585/45585 co-relation queries the response was YES. [2024-06-21 19:14:38,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5688 conditions, 847 events. 478/847 cut-off events. For 45585/45585 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3930 event pairs, 94 based on Foata normal form. 1/846 useless extension candidates. Maximal degree in co-relation 5593. Up to 742 conditions per place. [2024-06-21 19:14:38,198 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 33 changer transitions 0/215 dead transitions. [2024-06-21 19:14:38,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 215 transitions, 2450 flow [2024-06-21 19:14:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 19:14:38,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:14:38,199 INFO L175 Difference]: Start difference. First operand has 197 places, 199 transitions, 1960 flow. Second operand 9 states and 108 transitions. [2024-06-21 19:14:38,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 215 transitions, 2450 flow [2024-06-21 19:14:38,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 215 transitions, 2366 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 19:14:38,288 INFO L231 Difference]: Finished difference. Result has 199 places, 203 transitions, 1981 flow [2024-06-21 19:14:38,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1981, PETRI_PLACES=199, PETRI_TRANSITIONS=203} [2024-06-21 19:14:38,289 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 169 predicate places. [2024-06-21 19:14:38,289 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 203 transitions, 1981 flow [2024-06-21 19:14:38,289 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 19:14:38,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:38,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:38,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:14:38,290 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 19:14:38,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:38,290 INFO L85 PathProgramCache]: Analyzing trace with hash -425022983, now seen corresponding path program 4 times [2024-06-21 19:14:38,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:38,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170046303] [2024-06-21 19:14:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:38,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:39,768 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 19:14:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170046303] [2024-06-21 19:14:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170046303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:39,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:39,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277131011] [2024-06-21 19:14:39,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:39,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:39,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:39,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 203 transitions, 1981 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 19:14:39,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:39,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:39,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:40,191 INFO L124 PetriNetUnfolderBase]: 482/855 cut-off events. [2024-06-21 19:14:40,191 INFO L125 PetriNetUnfolderBase]: For 48730/48730 co-relation queries the response was YES. [2024-06-21 19:14:40,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5763 conditions, 855 events. 482/855 cut-off events. For 48730/48730 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3983 event pairs, 103 based on Foata normal form. 2/855 useless extension candidates. Maximal degree in co-relation 5666. Up to 782 conditions per place. [2024-06-21 19:14:40,198 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 28 changer transitions 0/214 dead transitions. [2024-06-21 19:14:40,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 214 transitions, 2439 flow [2024-06-21 19:14:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 19:14:40,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-21 19:14:40,199 INFO L175 Difference]: Start difference. First operand has 199 places, 203 transitions, 1981 flow. Second operand 10 states and 111 transitions. [2024-06-21 19:14:40,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 214 transitions, 2439 flow [2024-06-21 19:14:40,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 214 transitions, 2377 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:40,277 INFO L231 Difference]: Finished difference. Result has 203 places, 204 transitions, 1991 flow [2024-06-21 19:14:40,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1991, PETRI_PLACES=203, PETRI_TRANSITIONS=204} [2024-06-21 19:14:40,277 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-06-21 19:14:40,277 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 204 transitions, 1991 flow [2024-06-21 19:14:40,277 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 19:14:40,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:40,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:40,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:14:40,277 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 19:14:40,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:40,278 INFO L85 PathProgramCache]: Analyzing trace with hash -273314156, now seen corresponding path program 3 times [2024-06-21 19:14:40,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:40,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905147431] [2024-06-21 19:14:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:40,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:41,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905147431] [2024-06-21 19:14:41,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905147431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:41,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:41,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:41,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741536653] [2024-06-21 19:14:41,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:41,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:41,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:41,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:41,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:41,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:41,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 204 transitions, 1991 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 19:14:41,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:41,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:41,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:42,068 INFO L124 PetriNetUnfolderBase]: 485/860 cut-off events. [2024-06-21 19:14:42,069 INFO L125 PetriNetUnfolderBase]: For 48733/48733 co-relation queries the response was YES. [2024-06-21 19:14:42,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5806 conditions, 860 events. 485/860 cut-off events. For 48733/48733 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4017 event pairs, 96 based on Foata normal form. 1/859 useless extension candidates. Maximal degree in co-relation 5708. Up to 749 conditions per place. [2024-06-21 19:14:42,075 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 36 changer transitions 0/218 dead transitions. [2024-06-21 19:14:42,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 218 transitions, 2479 flow [2024-06-21 19:14:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 19:14:42,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:14:42,076 INFO L175 Difference]: Start difference. First operand has 203 places, 204 transitions, 1991 flow. Second operand 10 states and 115 transitions. [2024-06-21 19:14:42,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 218 transitions, 2479 flow [2024-06-21 19:14:42,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 218 transitions, 2419 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 19:14:42,173 INFO L231 Difference]: Finished difference. Result has 205 places, 206 transitions, 2028 flow [2024-06-21 19:14:42,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2028, PETRI_PLACES=205, PETRI_TRANSITIONS=206} [2024-06-21 19:14:42,173 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 175 predicate places. [2024-06-21 19:14:42,173 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 206 transitions, 2028 flow [2024-06-21 19:14:42,173 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 19:14:42,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:42,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:42,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:14:42,174 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 19:14:42,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:42,174 INFO L85 PathProgramCache]: Analyzing trace with hash -273462181, now seen corresponding path program 5 times [2024-06-21 19:14:42,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:42,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023772339] [2024-06-21 19:14:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:42,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:43,653 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 19:14:43,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:43,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023772339] [2024-06-21 19:14:43,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023772339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:43,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:43,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:43,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804321149] [2024-06-21 19:14:43,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:43,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:43,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:43,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:43,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:43,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:43,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 206 transitions, 2028 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 19:14:43,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:43,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:43,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:44,059 INFO L124 PetriNetUnfolderBase]: 496/881 cut-off events. [2024-06-21 19:14:44,059 INFO L125 PetriNetUnfolderBase]: For 55528/55528 co-relation queries the response was YES. [2024-06-21 19:14:44,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6073 conditions, 881 events. 496/881 cut-off events. For 55528/55528 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4143 event pairs, 104 based on Foata normal form. 2/881 useless extension candidates. Maximal degree in co-relation 5974. Up to 779 conditions per place. [2024-06-21 19:14:44,066 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 185 selfloop transitions, 33 changer transitions 0/220 dead transitions. [2024-06-21 19:14:44,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 220 transitions, 2632 flow [2024-06-21 19:14:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 19:14:44,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-21 19:14:44,066 INFO L175 Difference]: Start difference. First operand has 205 places, 206 transitions, 2028 flow. Second operand 10 states and 114 transitions. [2024-06-21 19:14:44,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 220 transitions, 2632 flow [2024-06-21 19:14:44,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 220 transitions, 2555 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:14:44,171 INFO L231 Difference]: Finished difference. Result has 207 places, 208 transitions, 2047 flow [2024-06-21 19:14:44,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2047, PETRI_PLACES=207, PETRI_TRANSITIONS=208} [2024-06-21 19:14:44,171 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2024-06-21 19:14:44,171 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 208 transitions, 2047 flow [2024-06-21 19:14:44,171 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 19:14:44,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:44,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:44,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:14:44,171 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 19:14:44,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:44,172 INFO L85 PathProgramCache]: Analyzing trace with hash 434302043, now seen corresponding path program 6 times [2024-06-21 19:14:44,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:44,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351224642] [2024-06-21 19:14:44,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:44,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:45,519 INFO 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 19:14:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351224642] [2024-06-21 19:14:45,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351224642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:45,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:45,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:45,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138774551] [2024-06-21 19:14:45,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:45,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:45,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:45,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:45,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 208 transitions, 2047 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 19:14:45,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:45,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:45,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:45,906 INFO L124 PetriNetUnfolderBase]: 493/876 cut-off events. [2024-06-21 19:14:45,907 INFO L125 PetriNetUnfolderBase]: For 53994/53994 co-relation queries the response was YES. [2024-06-21 19:14:45,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5954 conditions, 876 events. 493/876 cut-off events. For 53994/53994 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4115 event pairs, 105 based on Foata normal form. 2/876 useless extension candidates. Maximal degree in co-relation 5854. Up to 797 conditions per place. [2024-06-21 19:14:45,914 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 185 selfloop transitions, 31 changer transitions 0/218 dead transitions. [2024-06-21 19:14:45,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 218 transitions, 2503 flow [2024-06-21 19:14:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 19:14:45,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 19:14:45,915 INFO L175 Difference]: Start difference. First operand has 207 places, 208 transitions, 2047 flow. Second operand 10 states and 112 transitions. [2024-06-21 19:14:45,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 218 transitions, 2503 flow [2024-06-21 19:14:46,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 218 transitions, 2449 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:46,014 INFO L231 Difference]: Finished difference. Result has 211 places, 208 transitions, 2059 flow [2024-06-21 19:14:46,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2059, PETRI_PLACES=211, PETRI_TRANSITIONS=208} [2024-06-21 19:14:46,015 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-21 19:14:46,015 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 208 transitions, 2059 flow [2024-06-21 19:14:46,015 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 19:14:46,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:46,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:46,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:14:46,015 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 19:14:46,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash -273458306, now seen corresponding path program 4 times [2024-06-21 19:14:46,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:46,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534497788] [2024-06-21 19:14:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:46,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:47,333 INFO 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 19:14:47,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:47,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534497788] [2024-06-21 19:14:47,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534497788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:47,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:47,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:47,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439063948] [2024-06-21 19:14:47,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:47,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:47,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:47,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:47,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:47,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:47,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 208 transitions, 2059 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 19:14:47,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:47,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:47,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:47,723 INFO L124 PetriNetUnfolderBase]: 496/881 cut-off events. [2024-06-21 19:14:47,724 INFO L125 PetriNetUnfolderBase]: For 53894/53894 co-relation queries the response was YES. [2024-06-21 19:14:47,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6031 conditions, 881 events. 496/881 cut-off events. For 53894/53894 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4159 event pairs, 98 based on Foata normal form. 1/880 useless extension candidates. Maximal degree in co-relation 5929. Up to 761 conditions per place. [2024-06-21 19:14:47,730 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 40 changer transitions 0/222 dead transitions. [2024-06-21 19:14:47,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 222 transitions, 2559 flow [2024-06-21 19:14:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 19:14:47,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 19:14:47,731 INFO L175 Difference]: Start difference. First operand has 211 places, 208 transitions, 2059 flow. Second operand 9 states and 110 transitions. [2024-06-21 19:14:47,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 222 transitions, 2559 flow [2024-06-21 19:14:47,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 222 transitions, 2491 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 19:14:47,827 INFO L231 Difference]: Finished difference. Result has 211 places, 210 transitions, 2100 flow [2024-06-21 19:14:47,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2100, PETRI_PLACES=211, PETRI_TRANSITIONS=210} [2024-06-21 19:14:47,828 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-21 19:14:47,828 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 210 transitions, 2100 flow [2024-06-21 19:14:47,828 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 19:14:47,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:47,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:47,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:14:47,828 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 19:14:47,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash -994403207, now seen corresponding path program 7 times [2024-06-21 19:14:47,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:47,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914865042] [2024-06-21 19:14:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:47,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:49,347 INFO 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 19:14:49,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:49,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914865042] [2024-06-21 19:14:49,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914865042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:49,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:49,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:49,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980096406] [2024-06-21 19:14:49,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:49,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:49,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:49,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:49,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:49,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 210 transitions, 2100 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 19:14:49,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:49,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:49,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:49,758 INFO L124 PetriNetUnfolderBase]: 500/889 cut-off events. [2024-06-21 19:14:49,758 INFO L125 PetriNetUnfolderBase]: For 57646/57646 co-relation queries the response was YES. [2024-06-21 19:14:49,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6134 conditions, 889 events. 500/889 cut-off events. For 57646/57646 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4212 event pairs, 99 based on Foata normal form. 2/889 useless extension candidates. Maximal degree in co-relation 6031. Up to 766 conditions per place. [2024-06-21 19:14:49,765 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 183 selfloop transitions, 41 changer transitions 0/226 dead transitions. [2024-06-21 19:14:49,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 226 transitions, 2724 flow [2024-06-21 19:14:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 19:14:49,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 19:14:49,766 INFO L175 Difference]: Start difference. First operand has 211 places, 210 transitions, 2100 flow. Second operand 10 states and 119 transitions. [2024-06-21 19:14:49,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 226 transitions, 2724 flow [2024-06-21 19:14:49,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 226 transitions, 2635 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:49,863 INFO L231 Difference]: Finished difference. Result has 214 places, 211 transitions, 2111 flow [2024-06-21 19:14:49,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2111, PETRI_PLACES=214, PETRI_TRANSITIONS=211} [2024-06-21 19:14:49,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-06-21 19:14:49,863 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 211 transitions, 2111 flow [2024-06-21 19:14:49,863 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 19:14:49,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:49,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:49,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:14:49,865 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 19:14:49,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:49,866 INFO L85 PathProgramCache]: Analyzing trace with hash -994399487, now seen corresponding path program 8 times [2024-06-21 19:14:49,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:49,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157845664] [2024-06-21 19:14:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:49,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:51,442 INFO 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 19:14:51,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:51,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157845664] [2024-06-21 19:14:51,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157845664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:51,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:51,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:51,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553385837] [2024-06-21 19:14:51,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:51,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:51,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:51,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:51,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 211 transitions, 2111 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 19:14:51,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:51,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:51,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:51,861 INFO L124 PetriNetUnfolderBase]: 504/897 cut-off events. [2024-06-21 19:14:51,861 INFO L125 PetriNetUnfolderBase]: For 59566/59566 co-relation queries the response was YES. [2024-06-21 19:14:51,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6201 conditions, 897 events. 504/897 cut-off events. For 59566/59566 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4271 event pairs, 105 based on Foata normal form. 2/897 useless extension candidates. Maximal degree in co-relation 6097. Up to 807 conditions per place. [2024-06-21 19:14:51,869 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 183 selfloop transitions, 39 changer transitions 0/224 dead transitions. [2024-06-21 19:14:51,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 224 transitions, 2603 flow [2024-06-21 19:14:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 19:14:51,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:14:51,872 INFO L175 Difference]: Start difference. First operand has 214 places, 211 transitions, 2111 flow. Second operand 10 states and 115 transitions. [2024-06-21 19:14:51,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 224 transitions, 2603 flow [2024-06-21 19:14:51,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 224 transitions, 2479 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 19:14:51,976 INFO L231 Difference]: Finished difference. Result has 215 places, 212 transitions, 2087 flow [2024-06-21 19:14:51,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2087, PETRI_PLACES=215, PETRI_TRANSITIONS=212} [2024-06-21 19:14:51,977 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 185 predicate places. [2024-06-21 19:14:51,977 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 212 transitions, 2087 flow [2024-06-21 19:14:51,977 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 19:14:51,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:51,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:51,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:14:51,977 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 19:14:51,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:51,978 INFO L85 PathProgramCache]: Analyzing trace with hash -994399332, now seen corresponding path program 5 times [2024-06-21 19:14:51,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:51,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023958616] [2024-06-21 19:14:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:51,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:53,294 INFO 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 19:14:53,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:53,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023958616] [2024-06-21 19:14:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023958616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:53,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:53,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553216352] [2024-06-21 19:14:53,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:53,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:53,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:53,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:53,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 212 transitions, 2087 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 19:14:53,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:53,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:53,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:53,706 INFO L124 PetriNetUnfolderBase]: 507/902 cut-off events. [2024-06-21 19:14:53,706 INFO L125 PetriNetUnfolderBase]: For 59315/59315 co-relation queries the response was YES. [2024-06-21 19:14:53,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6172 conditions, 902 events. 507/902 cut-off events. For 59315/59315 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4305 event pairs, 102 based on Foata normal form. 1/901 useless extension candidates. Maximal degree in co-relation 6068. Up to 757 conditions per place. [2024-06-21 19:14:53,715 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 48 changer transitions 0/230 dead transitions. [2024-06-21 19:14:53,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 230 transitions, 2749 flow [2024-06-21 19:14:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 19:14:53,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 19:14:53,716 INFO L175 Difference]: Start difference. First operand has 215 places, 212 transitions, 2087 flow. Second operand 9 states and 114 transitions. [2024-06-21 19:14:53,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 230 transitions, 2749 flow [2024-06-21 19:14:53,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 230 transitions, 2665 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:14:53,838 INFO L231 Difference]: Finished difference. Result has 217 places, 218 transitions, 2178 flow [2024-06-21 19:14:53,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2178, PETRI_PLACES=217, PETRI_TRANSITIONS=218} [2024-06-21 19:14:53,838 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 187 predicate places. [2024-06-21 19:14:53,839 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 218 transitions, 2178 flow [2024-06-21 19:14:53,839 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 19:14:53,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:53,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:53,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:14:53,839 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 19:14:53,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash -994249602, now seen corresponding path program 6 times [2024-06-21 19:14:53,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:53,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361449921] [2024-06-21 19:14:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:53,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:55,259 INFO 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 19:14:55,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:55,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361449921] [2024-06-21 19:14:55,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361449921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:55,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:55,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:55,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624272288] [2024-06-21 19:14:55,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:55,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:55,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:55,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:55,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 218 transitions, 2178 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 19:14:55,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:55,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:55,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:55,763 INFO L124 PetriNetUnfolderBase]: 516/917 cut-off events. [2024-06-21 19:14:55,763 INFO L125 PetriNetUnfolderBase]: For 65353/65353 co-relation queries the response was YES. [2024-06-21 19:14:55,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6353 conditions, 917 events. 516/917 cut-off events. For 65353/65353 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 4398 event pairs, 94 based on Foata normal form. 3/918 useless extension candidates. Maximal degree in co-relation 6247. Up to 702 conditions per place. [2024-06-21 19:14:55,771 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 163 selfloop transitions, 73 changer transitions 0/238 dead transitions. [2024-06-21 19:14:55,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 238 transitions, 2882 flow [2024-06-21 19:14:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:55,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:55,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 19:14:55,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 19:14:55,772 INFO L175 Difference]: Start difference. First operand has 217 places, 218 transitions, 2178 flow. Second operand 10 states and 125 transitions. [2024-06-21 19:14:55,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 238 transitions, 2882 flow [2024-06-21 19:14:55,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 238 transitions, 2796 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:55,884 INFO L231 Difference]: Finished difference. Result has 223 places, 223 transitions, 2341 flow [2024-06-21 19:14:55,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2341, PETRI_PLACES=223, PETRI_TRANSITIONS=223} [2024-06-21 19:14:55,884 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2024-06-21 19:14:55,884 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 223 transitions, 2341 flow [2024-06-21 19:14:55,884 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 19:14:55,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:55,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:55,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:14:55,885 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 19:14:55,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1525004101, now seen corresponding path program 9 times [2024-06-21 19:14:55,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:55,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579135371] [2024-06-21 19:14:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:55,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:57,253 INFO 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 19:14:57,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:57,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579135371] [2024-06-21 19:14:57,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579135371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:57,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:57,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:57,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604808580] [2024-06-21 19:14:57,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:57,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:57,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:57,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:57,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 223 transitions, 2341 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 19:14:57,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:57,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:57,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:57,608 INFO L124 PetriNetUnfolderBase]: 520/925 cut-off events. [2024-06-21 19:14:57,609 INFO L125 PetriNetUnfolderBase]: For 65590/65590 co-relation queries the response was YES. [2024-06-21 19:14:57,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6585 conditions, 925 events. 520/925 cut-off events. For 65590/65590 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4450 event pairs, 99 based on Foata normal form. 2/925 useless extension candidates. Maximal degree in co-relation 6477. Up to 852 conditions per place. [2024-06-21 19:14:57,617 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 202 selfloop transitions, 31 changer transitions 0/235 dead transitions. [2024-06-21 19:14:57,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 235 transitions, 2849 flow [2024-06-21 19:14:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 19:14:57,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-21 19:14:57,618 INFO L175 Difference]: Start difference. First operand has 223 places, 223 transitions, 2341 flow. Second operand 9 states and 106 transitions. [2024-06-21 19:14:57,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 235 transitions, 2849 flow [2024-06-21 19:14:57,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 235 transitions, 2763 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:57,727 INFO L231 Difference]: Finished difference. Result has 227 places, 224 transitions, 2337 flow [2024-06-21 19:14:57,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2337, PETRI_PLACES=227, PETRI_TRANSITIONS=224} [2024-06-21 19:14:57,727 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 197 predicate places. [2024-06-21 19:14:57,728 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 224 transitions, 2337 flow [2024-06-21 19:14:57,728 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 19:14:57,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:57,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:14:57,728 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 19:14:57,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash -994255182, now seen corresponding path program 7 times [2024-06-21 19:14:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:57,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462900299] [2024-06-21 19:14:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:57,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:59,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:59,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462900299] [2024-06-21 19:14:59,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462900299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:59,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:59,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:14:59,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106806727] [2024-06-21 19:14:59,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:59,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:14:59,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:59,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:14:59,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:14:59,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:59,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 224 transitions, 2337 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 19:14:59,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:59,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:59,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:59,548 INFO L124 PetriNetUnfolderBase]: 523/930 cut-off events. [2024-06-21 19:14:59,548 INFO L125 PetriNetUnfolderBase]: For 65484/65484 co-relation queries the response was YES. [2024-06-21 19:14:59,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6590 conditions, 930 events. 523/930 cut-off events. For 65484/65484 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4485 event pairs, 98 based on Foata normal form. 1/929 useless extension candidates. Maximal degree in co-relation 6481. Up to 819 conditions per place. [2024-06-21 19:14:59,555 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 191 selfloop transitions, 44 changer transitions 0/237 dead transitions. [2024-06-21 19:14:59,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 237 transitions, 2868 flow [2024-06-21 19:14:59,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:14:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:14:59,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 19:14:59,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 19:14:59,557 INFO L175 Difference]: Start difference. First operand has 227 places, 224 transitions, 2337 flow. Second operand 10 states and 117 transitions. [2024-06-21 19:14:59,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 237 transitions, 2868 flow [2024-06-21 19:14:59,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 237 transitions, 2798 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:59,666 INFO L231 Difference]: Finished difference. Result has 230 places, 227 transitions, 2399 flow [2024-06-21 19:14:59,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2399, PETRI_PLACES=230, PETRI_TRANSITIONS=227} [2024-06-21 19:14:59,667 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-21 19:14:59,667 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 227 transitions, 2399 flow [2024-06-21 19:14:59,667 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 19:14:59,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:59,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:59,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:14:59,667 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 19:14:59,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:59,667 INFO L85 PathProgramCache]: Analyzing trace with hash -280924908, now seen corresponding path program 8 times [2024-06-21 19:14:59,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:59,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942334184] [2024-06-21 19:14:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:59,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:01,092 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 19:15:01,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:01,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942334184] [2024-06-21 19:15:01,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942334184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:01,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:01,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:01,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374329323] [2024-06-21 19:15:01,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:01,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:01,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:01,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:01,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:01,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:01,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 227 transitions, 2399 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 19:15:01,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:01,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:01,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:01,517 INFO L124 PetriNetUnfolderBase]: 532/945 cut-off events. [2024-06-21 19:15:01,517 INFO L125 PetriNetUnfolderBase]: For 71983/71983 co-relation queries the response was YES. [2024-06-21 19:15:01,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6737 conditions, 945 events. 532/945 cut-off events. For 71983/71983 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 4582 event pairs, 99 based on Foata normal form. 3/946 useless extension candidates. Maximal degree in co-relation 6627. Up to 730 conditions per place. [2024-06-21 19:15:01,526 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 179 selfloop transitions, 66 changer transitions 0/247 dead transitions. [2024-06-21 19:15:01,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 247 transitions, 3147 flow [2024-06-21 19:15:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 19:15:01,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:15:01,527 INFO L175 Difference]: Start difference. First operand has 230 places, 227 transitions, 2399 flow. Second operand 9 states and 117 transitions. [2024-06-21 19:15:01,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 247 transitions, 3147 flow [2024-06-21 19:15:01,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 247 transitions, 3044 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:01,646 INFO L231 Difference]: Finished difference. Result has 233 places, 231 transitions, 2507 flow [2024-06-21 19:15:01,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2507, PETRI_PLACES=233, PETRI_TRANSITIONS=231} [2024-06-21 19:15:01,647 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-21 19:15:01,647 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 231 transitions, 2507 flow [2024-06-21 19:15:01,647 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 19:15:01,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:01,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:01,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:15:01,648 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 19:15:01,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash -281132298, now seen corresponding path program 9 times [2024-06-21 19:15:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:01,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430676446] [2024-06-21 19:15:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:03,040 INFO 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 19:15:03,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:03,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430676446] [2024-06-21 19:15:03,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430676446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:03,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:03,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:03,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689333369] [2024-06-21 19:15:03,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:03,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:03,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:03,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:03,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:03,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 231 transitions, 2507 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 19:15:03,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:03,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:03,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:03,489 INFO L124 PetriNetUnfolderBase]: 540/958 cut-off events. [2024-06-21 19:15:03,489 INFO L125 PetriNetUnfolderBase]: For 72065/72065 co-relation queries the response was YES. [2024-06-21 19:15:03,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7015 conditions, 958 events. 540/958 cut-off events. For 72065/72065 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 4642 event pairs, 100 based on Foata normal form. 1/957 useless extension candidates. Maximal degree in co-relation 6904. Up to 843 conditions per place. [2024-06-21 19:15:03,497 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 202 selfloop transitions, 43 changer transitions 0/247 dead transitions. [2024-06-21 19:15:03,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 247 transitions, 3244 flow [2024-06-21 19:15:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 19:15:03,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 19:15:03,499 INFO L175 Difference]: Start difference. First operand has 233 places, 231 transitions, 2507 flow. Second operand 10 states and 116 transitions. [2024-06-21 19:15:03,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 247 transitions, 3244 flow [2024-06-21 19:15:03,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 247 transitions, 3079 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:03,630 INFO L231 Difference]: Finished difference. Result has 236 places, 237 transitions, 2524 flow [2024-06-21 19:15:03,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2524, PETRI_PLACES=236, PETRI_TRANSITIONS=237} [2024-06-21 19:15:03,631 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 206 predicate places. [2024-06-21 19:15:03,631 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 237 transitions, 2524 flow [2024-06-21 19:15:03,631 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 19:15:03,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:03,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:03,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:15:03,631 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 19:15:03,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash -988887222, now seen corresponding path program 10 times [2024-06-21 19:15:03,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:03,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508092636] [2024-06-21 19:15:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:03,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:05,035 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 19:15:05,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:05,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508092636] [2024-06-21 19:15:05,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508092636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:05,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:05,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:05,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400103054] [2024-06-21 19:15:05,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:05,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:05,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:05,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:05,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:05,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 237 transitions, 2524 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 19:15:05,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:05,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:05,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:05,507 INFO L124 PetriNetUnfolderBase]: 544/965 cut-off events. [2024-06-21 19:15:05,507 INFO L125 PetriNetUnfolderBase]: For 76264/76264 co-relation queries the response was YES. [2024-06-21 19:15:05,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6933 conditions, 965 events. 544/965 cut-off events. For 76264/76264 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 4685 event pairs, 99 based on Foata normal form. 3/966 useless extension candidates. Maximal degree in co-relation 6821. Up to 750 conditions per place. [2024-06-21 19:15:05,515 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 187 selfloop transitions, 65 changer transitions 0/254 dead transitions. [2024-06-21 19:15:05,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 254 transitions, 3248 flow [2024-06-21 19:15:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:05,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-21 19:15:05,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-21 19:15:05,516 INFO L175 Difference]: Start difference. First operand has 236 places, 237 transitions, 2524 flow. Second operand 10 states and 126 transitions. [2024-06-21 19:15:05,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 254 transitions, 3248 flow [2024-06-21 19:15:05,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 254 transitions, 3187 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 19:15:05,648 INFO L231 Difference]: Finished difference. Result has 243 places, 239 transitions, 2634 flow [2024-06-21 19:15:05,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2634, PETRI_PLACES=243, PETRI_TRANSITIONS=239} [2024-06-21 19:15:05,648 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-21 19:15:05,648 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 239 transitions, 2634 flow [2024-06-21 19:15:05,648 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 19:15:05,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:05,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:05,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:15:05,649 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 19:15:05,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash -988892957, now seen corresponding path program 10 times [2024-06-21 19:15:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:05,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722734183] [2024-06-21 19:15:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:05,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:06,973 INFO 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 19:15:06,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:06,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722734183] [2024-06-21 19:15:06,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722734183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:06,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:06,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:06,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821784960] [2024-06-21 19:15:06,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:06,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:06,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:07,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:07,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 239 transitions, 2634 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 19:15:07,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:07,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:07,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:07,422 INFO L124 PetriNetUnfolderBase]: 548/973 cut-off events. [2024-06-21 19:15:07,422 INFO L125 PetriNetUnfolderBase]: For 76236/76236 co-relation queries the response was YES. [2024-06-21 19:15:07,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7135 conditions, 973 events. 548/973 cut-off events. For 76236/76236 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4755 event pairs, 97 based on Foata normal form. 2/973 useless extension candidates. Maximal degree in co-relation 7021. Up to 900 conditions per place. [2024-06-21 19:15:07,429 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 220 selfloop transitions, 28 changer transitions 0/250 dead transitions. [2024-06-21 19:15:07,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 250 transitions, 3170 flow [2024-06-21 19:15:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-21 19:15:07,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-21 19:15:07,430 INFO L175 Difference]: Start difference. First operand has 243 places, 239 transitions, 2634 flow. Second operand 9 states and 104 transitions. [2024-06-21 19:15:07,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 250 transitions, 3170 flow [2024-06-21 19:15:07,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 250 transitions, 3021 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:07,588 INFO L231 Difference]: Finished difference. Result has 244 places, 240 transitions, 2563 flow [2024-06-21 19:15:07,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2563, PETRI_PLACES=244, PETRI_TRANSITIONS=240} [2024-06-21 19:15:07,588 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2024-06-21 19:15:07,588 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 240 transitions, 2563 flow [2024-06-21 19:15:07,588 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 19:15:07,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:07,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:07,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:15:07,589 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 19:15:07,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:07,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1654554584, now seen corresponding path program 11 times [2024-06-21 19:15:07,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:07,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277500292] [2024-06-21 19:15:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:08,782 INFO 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 19:15:08,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:08,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277500292] [2024-06-21 19:15:08,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277500292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:08,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:08,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:08,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261918748] [2024-06-21 19:15:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:08,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:08,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:08,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:08,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:08,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:08,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 240 transitions, 2563 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 19:15:08,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:08,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:08,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:09,196 INFO L124 PetriNetUnfolderBase]: 551/977 cut-off events. [2024-06-21 19:15:09,197 INFO L125 PetriNetUnfolderBase]: For 75470/75470 co-relation queries the response was YES. [2024-06-21 19:15:09,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7110 conditions, 977 events. 551/977 cut-off events. For 75470/75470 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4780 event pairs, 96 based on Foata normal form. 1/976 useless extension candidates. Maximal degree in co-relation 6995. Up to 934 conditions per place. [2024-06-21 19:15:09,205 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 227 selfloop transitions, 24 changer transitions 0/253 dead transitions. [2024-06-21 19:15:09,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 253 transitions, 3151 flow [2024-06-21 19:15:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 19:15:09,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 19:15:09,206 INFO L175 Difference]: Start difference. First operand has 244 places, 240 transitions, 2563 flow. Second operand 9 states and 102 transitions. [2024-06-21 19:15:09,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 253 transitions, 3151 flow [2024-06-21 19:15:09,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 253 transitions, 3085 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:09,370 INFO L231 Difference]: Finished difference. Result has 246 places, 245 transitions, 2622 flow [2024-06-21 19:15:09,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2497, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2622, PETRI_PLACES=246, PETRI_TRANSITIONS=245} [2024-06-21 19:15:09,370 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2024-06-21 19:15:09,370 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 245 transitions, 2622 flow [2024-06-21 19:15:09,370 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 19:15:09,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:09,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:09,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:15:09,371 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 19:15:09,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1920259521, now seen corresponding path program 1 times [2024-06-21 19:15:09,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:09,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372460944] [2024-06-21 19:15:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:09,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:10,504 INFO 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 19:15:10,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:10,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372460944] [2024-06-21 19:15:10,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372460944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:10,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:10,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:10,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409923987] [2024-06-21 19:15:10,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:10,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:10,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:10,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:10,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:10,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 245 transitions, 2622 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 19:15:10,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:10,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:10,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:10,940 INFO L124 PetriNetUnfolderBase]: 545/968 cut-off events. [2024-06-21 19:15:10,941 INFO L125 PetriNetUnfolderBase]: For 74785/74785 co-relation queries the response was YES. [2024-06-21 19:15:10,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6846 conditions, 968 events. 545/968 cut-off events. For 74785/74785 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 4732 event pairs, 93 based on Foata normal form. 3/969 useless extension candidates. Maximal degree in co-relation 6730. Up to 923 conditions per place. [2024-06-21 19:15:10,950 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 232 selfloop transitions, 23 changer transitions 0/257 dead transitions. [2024-06-21 19:15:10,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 257 transitions, 3190 flow [2024-06-21 19:15:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 19:15:10,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 19:15:10,951 INFO L175 Difference]: Start difference. First operand has 246 places, 245 transitions, 2622 flow. Second operand 10 states and 107 transitions. [2024-06-21 19:15:10,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 257 transitions, 3190 flow [2024-06-21 19:15:11,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 257 transitions, 3108 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:11,116 INFO L231 Difference]: Finished difference. Result has 251 places, 247 transitions, 2629 flow [2024-06-21 19:15:11,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2629, PETRI_PLACES=251, PETRI_TRANSITIONS=247} [2024-06-21 19:15:11,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 19:15:11,116 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 247 transitions, 2629 flow [2024-06-21 19:15:11,117 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 19:15:11,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:11,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:11,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:15:11,117 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 19:15:11,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1654352774, now seen corresponding path program 12 times [2024-06-21 19:15:11,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:11,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285468409] [2024-06-21 19:15:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:11,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:12,304 INFO 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 19:15:12,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:12,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285468409] [2024-06-21 19:15:12,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285468409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:12,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:12,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:12,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711037670] [2024-06-21 19:15:12,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:12,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:12,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:12,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:12,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 247 transitions, 2629 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 19:15:12,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:12,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:12,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:12,710 INFO L124 PetriNetUnfolderBase]: 548/973 cut-off events. [2024-06-21 19:15:12,710 INFO L125 PetriNetUnfolderBase]: For 71324/71324 co-relation queries the response was YES. [2024-06-21 19:15:12,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 973 events. 548/973 cut-off events. For 71324/71324 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4776 event pairs, 97 based on Foata normal form. 1/972 useless extension candidates. Maximal degree in co-relation 6797. Up to 930 conditions per place. [2024-06-21 19:15:12,717 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 230 selfloop transitions, 25 changer transitions 0/257 dead transitions. [2024-06-21 19:15:12,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 257 transitions, 3201 flow [2024-06-21 19:15:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-21 19:15:12,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-21 19:15:12,718 INFO L175 Difference]: Start difference. First operand has 251 places, 247 transitions, 2629 flow. Second operand 9 states and 101 transitions. [2024-06-21 19:15:12,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 257 transitions, 3201 flow [2024-06-21 19:15:12,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 257 transitions, 3130 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:12,880 INFO L231 Difference]: Finished difference. Result has 252 places, 249 transitions, 2661 flow [2024-06-21 19:15:12,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2558, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2661, PETRI_PLACES=252, PETRI_TRANSITIONS=249} [2024-06-21 19:15:12,880 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-21 19:15:12,880 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 249 transitions, 2661 flow [2024-06-21 19:15:12,880 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 19:15:12,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:12,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:12,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:15:12,881 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 19:15:12,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:12,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1911055094, now seen corresponding path program 13 times [2024-06-21 19:15:12,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:12,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740486585] [2024-06-21 19:15:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:12,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:14,043 INFO 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 19:15:14,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:14,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740486585] [2024-06-21 19:15:14,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740486585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:14,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:14,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:14,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243117764] [2024-06-21 19:15:14,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:14,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:14,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:14,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:14,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:14,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:14,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 249 transitions, 2661 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 19:15:14,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:14,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:14,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:14,422 INFO L124 PetriNetUnfolderBase]: 551/978 cut-off events. [2024-06-21 19:15:14,422 INFO L125 PetriNetUnfolderBase]: For 73408/73408 co-relation queries the response was YES. [2024-06-21 19:15:14,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6980 conditions, 978 events. 551/978 cut-off events. For 73408/73408 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4794 event pairs, 95 based on Foata normal form. 1/977 useless extension candidates. Maximal degree in co-relation 6862. Up to 950 conditions per place. [2024-06-21 19:15:14,431 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 240 selfloop transitions, 17 changer transitions 0/259 dead transitions. [2024-06-21 19:15:14,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 259 transitions, 3241 flow [2024-06-21 19:15:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 19:15:14,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-21 19:15:14,432 INFO L175 Difference]: Start difference. First operand has 252 places, 249 transitions, 2661 flow. Second operand 9 states and 98 transitions. [2024-06-21 19:15:14,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 259 transitions, 3241 flow [2024-06-21 19:15:14,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 259 transitions, 3153 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:14,592 INFO L231 Difference]: Finished difference. Result has 256 places, 251 transitions, 2664 flow [2024-06-21 19:15:14,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2664, PETRI_PLACES=256, PETRI_TRANSITIONS=251} [2024-06-21 19:15:14,593 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-21 19:15:14,593 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 251 transitions, 2664 flow [2024-06-21 19:15:14,593 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 19:15:14,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:14,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:14,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:15:14,593 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 19:15:14,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:14,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1654347039, now seen corresponding path program 11 times [2024-06-21 19:15:14,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:14,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043068524] [2024-06-21 19:15:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:15,897 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 19:15:15,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:15,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043068524] [2024-06-21 19:15:15,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043068524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:15,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:15,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:15,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10345225] [2024-06-21 19:15:15,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:15,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:15,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:15,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:15,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 251 transitions, 2664 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 19:15:15,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:15,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:15,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:16,284 INFO L124 PetriNetUnfolderBase]: 548/973 cut-off events. [2024-06-21 19:15:16,285 INFO L125 PetriNetUnfolderBase]: For 72403/72403 co-relation queries the response was YES. [2024-06-21 19:15:16,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6781 conditions, 973 events. 548/973 cut-off events. For 72403/72403 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4764 event pairs, 96 based on Foata normal form. 2/973 useless extension candidates. Maximal degree in co-relation 6662. Up to 942 conditions per place. [2024-06-21 19:15:16,294 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 242 selfloop transitions, 16 changer transitions 0/260 dead transitions. [2024-06-21 19:15:16,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 260 transitions, 3200 flow [2024-06-21 19:15:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 19:15:16,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-21 19:15:16,295 INFO L175 Difference]: Start difference. First operand has 256 places, 251 transitions, 2664 flow. Second operand 9 states and 98 transitions. [2024-06-21 19:15:16,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 260 transitions, 3200 flow [2024-06-21 19:15:16,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 260 transitions, 3110 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:16,450 INFO L231 Difference]: Finished difference. Result has 258 places, 251 transitions, 2610 flow [2024-06-21 19:15:16,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2610, PETRI_PLACES=258, PETRI_TRANSITIONS=251} [2024-06-21 19:15:16,451 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 228 predicate places. [2024-06-21 19:15:16,451 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 251 transitions, 2610 flow [2024-06-21 19:15:16,451 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 19:15:16,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:16,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:16,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:15:16,451 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 19:15:16,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:16,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1654347194, now seen corresponding path program 14 times [2024-06-21 19:15:16,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:16,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989854053] [2024-06-21 19:15:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:16,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:17,790 INFO 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 19:15:17,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:17,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989854053] [2024-06-21 19:15:17,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989854053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:17,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:17,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:17,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175286319] [2024-06-21 19:15:17,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:17,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:17,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:17,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:17,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 251 transitions, 2610 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 19:15:17,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:17,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:17,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:18,224 INFO L124 PetriNetUnfolderBase]: 546/970 cut-off events. [2024-06-21 19:15:18,224 INFO L125 PetriNetUnfolderBase]: For 68241/68241 co-relation queries the response was YES. [2024-06-21 19:15:18,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6643 conditions, 970 events. 546/970 cut-off events. For 68241/68241 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4742 event pairs, 94 based on Foata normal form. 1/969 useless extension candidates. Maximal degree in co-relation 6523. Up to 915 conditions per place. [2024-06-21 19:15:18,233 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 225 selfloop transitions, 32 changer transitions 0/259 dead transitions. [2024-06-21 19:15:18,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 259 transitions, 3142 flow [2024-06-21 19:15:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 19:15:18,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 19:15:18,234 INFO L175 Difference]: Start difference. First operand has 258 places, 251 transitions, 2610 flow. Second operand 10 states and 108 transitions. [2024-06-21 19:15:18,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 259 transitions, 3142 flow [2024-06-21 19:15:18,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 259 transitions, 3094 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:18,405 INFO L231 Difference]: Finished difference. Result has 261 places, 251 transitions, 2631 flow [2024-06-21 19:15:18,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2631, PETRI_PLACES=261, PETRI_TRANSITIONS=251} [2024-06-21 19:15:18,406 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2024-06-21 19:15:18,406 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 251 transitions, 2631 flow [2024-06-21 19:15:18,406 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 19:15:18,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:18,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:18,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:15:18,406 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 19:15:18,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:18,407 INFO L85 PathProgramCache]: Analyzing trace with hash -164025331, now seen corresponding path program 12 times [2024-06-21 19:15:18,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:18,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937202140] [2024-06-21 19:15:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:19,757 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 19:15:19,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:19,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937202140] [2024-06-21 19:15:19,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937202140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:19,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:19,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:19,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452885026] [2024-06-21 19:15:19,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:19,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:19,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:19,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:19,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 251 transitions, 2631 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:19,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:19,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:19,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:20,093 INFO L124 PetriNetUnfolderBase]: 550/978 cut-off events. [2024-06-21 19:15:20,093 INFO L125 PetriNetUnfolderBase]: For 72885/72885 co-relation queries the response was YES. [2024-06-21 19:15:20,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6710 conditions, 978 events. 550/978 cut-off events. For 72885/72885 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 4812 event pairs, 37 based on Foata normal form. 2/978 useless extension candidates. Maximal degree in co-relation 6589. Up to 608 conditions per place. [2024-06-21 19:15:20,102 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 189 selfloop transitions, 78 changer transitions 0/269 dead transitions. [2024-06-21 19:15:20,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 269 transitions, 3373 flow [2024-06-21 19:15:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 19:15:20,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 19:15:20,102 INFO L175 Difference]: Start difference. First operand has 261 places, 251 transitions, 2631 flow. Second operand 9 states and 118 transitions. [2024-06-21 19:15:20,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 269 transitions, 3373 flow [2024-06-21 19:15:20,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 269 transitions, 3217 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 19:15:20,284 INFO L231 Difference]: Finished difference. Result has 260 places, 252 transitions, 2647 flow [2024-06-21 19:15:20,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2647, PETRI_PLACES=260, PETRI_TRANSITIONS=252} [2024-06-21 19:15:20,285 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2024-06-21 19:15:20,285 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 252 transitions, 2647 flow [2024-06-21 19:15:20,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:20,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:20,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:20,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:15:20,285 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 19:15:20,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash -163934966, now seen corresponding path program 15 times [2024-06-21 19:15:20,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:20,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366038772] [2024-06-21 19:15:20,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:21,566 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 19:15:21,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:21,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366038772] [2024-06-21 19:15:21,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366038772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:21,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:21,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114335] [2024-06-21 19:15:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:21,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:21,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:21,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 252 transitions, 2647 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:21,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:21,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:21,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:21,936 INFO L124 PetriNetUnfolderBase]: 553/983 cut-off events. [2024-06-21 19:15:21,936 INFO L125 PetriNetUnfolderBase]: For 71672/71672 co-relation queries the response was YES. [2024-06-21 19:15:21,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 983 events. 553/983 cut-off events. For 71672/71672 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 4834 event pairs, 66 based on Foata normal form. 1/982 useless extension candidates. Maximal degree in co-relation 6677. Up to 688 conditions per place. [2024-06-21 19:15:21,945 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 166 selfloop transitions, 102 changer transitions 0/270 dead transitions. [2024-06-21 19:15:21,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 270 transitions, 3417 flow [2024-06-21 19:15:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:21,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 19:15:21,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-06-21 19:15:21,947 INFO L175 Difference]: Start difference. First operand has 260 places, 252 transitions, 2647 flow. Second operand 9 states and 122 transitions. [2024-06-21 19:15:21,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 270 transitions, 3417 flow [2024-06-21 19:15:22,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 270 transitions, 3281 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:22,123 INFO L231 Difference]: Finished difference. Result has 262 places, 256 transitions, 2769 flow [2024-06-21 19:15:22,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2769, PETRI_PLACES=262, PETRI_TRANSITIONS=256} [2024-06-21 19:15:22,123 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-21 19:15:22,123 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 256 transitions, 2769 flow [2024-06-21 19:15:22,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:22,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:22,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:22,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:15:22,124 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 19:15:22,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:22,124 INFO L85 PathProgramCache]: Analyzing trace with hash -163938841, now seen corresponding path program 13 times [2024-06-21 19:15:22,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:22,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073129815] [2024-06-21 19:15:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:22,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:23,474 INFO 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 19:15:23,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:23,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073129815] [2024-06-21 19:15:23,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073129815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:23,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:23,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:23,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581037464] [2024-06-21 19:15:23,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:23,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:23,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:23,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:23,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:23,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 256 transitions, 2769 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:23,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:23,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:23,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:23,818 INFO L124 PetriNetUnfolderBase]: 564/1004 cut-off events. [2024-06-21 19:15:23,818 INFO L125 PetriNetUnfolderBase]: For 81013/81013 co-relation queries the response was YES. [2024-06-21 19:15:23,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7084 conditions, 1004 events. 564/1004 cut-off events. For 81013/81013 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 5005 event pairs, 59 based on Foata normal form. 2/1004 useless extension candidates. Maximal degree in co-relation 6963. Up to 784 conditions per place. [2024-06-21 19:15:23,829 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 203 selfloop transitions, 69 changer transitions 0/274 dead transitions. [2024-06-21 19:15:23,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 274 transitions, 3525 flow [2024-06-21 19:15:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-21 19:15:23,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-21 19:15:23,830 INFO L175 Difference]: Start difference. First operand has 262 places, 256 transitions, 2769 flow. Second operand 9 states and 121 transitions. [2024-06-21 19:15:23,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 274 transitions, 3525 flow [2024-06-21 19:15:24,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 274 transitions, 3411 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:24,015 INFO L231 Difference]: Finished difference. Result has 264 places, 258 transitions, 2817 flow [2024-06-21 19:15:24,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2657, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2817, PETRI_PLACES=264, PETRI_TRANSITIONS=258} [2024-06-21 19:15:24,015 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-06-21 19:15:24,015 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 258 transitions, 2817 flow [2024-06-21 19:15:24,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:24,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:24,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:24,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:15:24,016 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 19:15:24,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:24,016 INFO L85 PathProgramCache]: Analyzing trace with hash -163935121, now seen corresponding path program 14 times [2024-06-21 19:15:24,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:24,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487016266] [2024-06-21 19:15:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:24,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:25,360 INFO 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 19:15:25,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:25,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487016266] [2024-06-21 19:15:25,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487016266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:25,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:25,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:25,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354436402] [2024-06-21 19:15:25,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:25,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:25,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:25,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:25,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:25,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 258 transitions, 2817 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:25,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:25,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:25,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:25,731 INFO L124 PetriNetUnfolderBase]: 561/999 cut-off events. [2024-06-21 19:15:25,732 INFO L125 PetriNetUnfolderBase]: For 74987/74987 co-relation queries the response was YES. [2024-06-21 19:15:25,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6977 conditions, 999 events. 561/999 cut-off events. For 74987/74987 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 4962 event pairs, 60 based on Foata normal form. 2/999 useless extension candidates. Maximal degree in co-relation 6856. Up to 810 conditions per place. [2024-06-21 19:15:25,741 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 203 selfloop transitions, 67 changer transitions 0/272 dead transitions. [2024-06-21 19:15:25,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 272 transitions, 3395 flow [2024-06-21 19:15:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 19:15:25,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 19:15:25,742 INFO L175 Difference]: Start difference. First operand has 264 places, 258 transitions, 2817 flow. Second operand 9 states and 118 transitions. [2024-06-21 19:15:25,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 272 transitions, 3395 flow [2024-06-21 19:15:25,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 272 transitions, 3304 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:25,909 INFO L231 Difference]: Finished difference. Result has 267 places, 258 transitions, 2866 flow [2024-06-21 19:15:25,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2866, PETRI_PLACES=267, PETRI_TRANSITIONS=258} [2024-06-21 19:15:25,910 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-06-21 19:15:25,910 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 258 transitions, 2866 flow [2024-06-21 19:15:25,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:25,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:25,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:25,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:15:25,910 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 19:15:25,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:25,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1664793388, now seen corresponding path program 16 times [2024-06-21 19:15:25,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:25,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663782062] [2024-06-21 19:15:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:25,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:27,265 INFO 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 19:15:27,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:27,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663782062] [2024-06-21 19:15:27,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663782062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:27,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:27,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:27,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063060822] [2024-06-21 19:15:27,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:27,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:27,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:27,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:27,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 258 transitions, 2866 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:27,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:27,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:27,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:27,730 INFO L124 PetriNetUnfolderBase]: 564/1004 cut-off events. [2024-06-21 19:15:27,731 INFO L125 PetriNetUnfolderBase]: For 71964/71964 co-relation queries the response was YES. [2024-06-21 19:15:27,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7110 conditions, 1004 events. 564/1004 cut-off events. For 71964/71964 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5010 event pairs, 60 based on Foata normal form. 1/1003 useless extension candidates. Maximal degree in co-relation 6988. Up to 842 conditions per place. [2024-06-21 19:15:27,740 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 204 selfloop transitions, 64 changer transitions 0/270 dead transitions. [2024-06-21 19:15:27,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 270 transitions, 3448 flow [2024-06-21 19:15:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 19:15:27,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 19:15:27,741 INFO L175 Difference]: Start difference. First operand has 267 places, 258 transitions, 2866 flow. Second operand 9 states and 118 transitions. [2024-06-21 19:15:27,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 270 transitions, 3448 flow [2024-06-21 19:15:27,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 270 transitions, 3306 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 19:15:27,918 INFO L231 Difference]: Finished difference. Result has 267 places, 260 transitions, 2886 flow [2024-06-21 19:15:27,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2886, PETRI_PLACES=267, PETRI_TRANSITIONS=260} [2024-06-21 19:15:27,919 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2024-06-21 19:15:27,919 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 260 transitions, 2886 flow [2024-06-21 19:15:27,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:27,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:27,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:27,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:15:27,919 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 19:15:27,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:27,919 INFO L85 PathProgramCache]: Analyzing trace with hash -77099006, now seen corresponding path program 17 times [2024-06-21 19:15:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:27,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718082218] [2024-06-21 19:15:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:27,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:29,244 INFO 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 19:15:29,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:29,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718082218] [2024-06-21 19:15:29,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718082218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:29,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:29,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:29,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350331983] [2024-06-21 19:15:29,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:29,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:29,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:29,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:29,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:29,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 260 transitions, 2886 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:29,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:29,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:29,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:29,682 INFO L124 PetriNetUnfolderBase]: 567/1009 cut-off events. [2024-06-21 19:15:29,682 INFO L125 PetriNetUnfolderBase]: For 72036/72036 co-relation queries the response was YES. [2024-06-21 19:15:29,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7140 conditions, 1009 events. 567/1009 cut-off events. For 72036/72036 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 5027 event pairs, 60 based on Foata normal form. 1/1008 useless extension candidates. Maximal degree in co-relation 7018. Up to 835 conditions per place. [2024-06-21 19:15:29,692 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 200 selfloop transitions, 70 changer transitions 0/272 dead transitions. [2024-06-21 19:15:29,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 272 transitions, 3476 flow [2024-06-21 19:15:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-21 19:15:29,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-21 19:15:29,692 INFO L175 Difference]: Start difference. First operand has 267 places, 260 transitions, 2886 flow. Second operand 9 states and 119 transitions. [2024-06-21 19:15:29,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 272 transitions, 3476 flow [2024-06-21 19:15:29,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 272 transitions, 3339 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:29,881 INFO L231 Difference]: Finished difference. Result has 268 places, 262 transitions, 2927 flow [2024-06-21 19:15:29,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2749, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2927, PETRI_PLACES=268, PETRI_TRANSITIONS=262} [2024-06-21 19:15:29,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 19:15:29,882 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 262 transitions, 2927 flow [2024-06-21 19:15:29,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:29,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:29,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:29,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:15:29,882 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 19:15:29,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:29,882 INFO L85 PathProgramCache]: Analyzing trace with hash -77099161, now seen corresponding path program 15 times [2024-06-21 19:15:29,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:29,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220470061] [2024-06-21 19:15:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:29,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:29,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:31,250 INFO 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 19:15:31,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:31,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220470061] [2024-06-21 19:15:31,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220470061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:31,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:31,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575743829] [2024-06-21 19:15:31,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:31,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:31,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:31,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:31,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 262 transitions, 2927 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:31,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:31,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:31,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:31,696 INFO L124 PetriNetUnfolderBase]: 571/1017 cut-off events. [2024-06-21 19:15:31,696 INFO L125 PetriNetUnfolderBase]: For 75060/75060 co-relation queries the response was YES. [2024-06-21 19:15:31,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7180 conditions, 1017 events. 571/1017 cut-off events. For 75060/75060 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5071 event pairs, 60 based on Foata normal form. 2/1017 useless extension candidates. Maximal degree in co-relation 7058. Up to 896 conditions per place. [2024-06-21 19:15:31,706 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 226 selfloop transitions, 46 changer transitions 0/274 dead transitions. [2024-06-21 19:15:31,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 274 transitions, 3506 flow [2024-06-21 19:15:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 19:15:31,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 19:15:31,708 INFO L175 Difference]: Start difference. First operand has 268 places, 262 transitions, 2927 flow. Second operand 9 states and 115 transitions. [2024-06-21 19:15:31,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 274 transitions, 3506 flow [2024-06-21 19:15:31,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 274 transitions, 3353 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:31,882 INFO L231 Difference]: Finished difference. Result has 269 places, 263 transitions, 2883 flow [2024-06-21 19:15:31,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2883, PETRI_PLACES=269, PETRI_TRANSITIONS=263} [2024-06-21 19:15:31,882 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 239 predicate places. [2024-06-21 19:15:31,882 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 263 transitions, 2883 flow [2024-06-21 19:15:31,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:31,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:31,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:31,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:15:31,883 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 19:15:31,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash -77247031, now seen corresponding path program 16 times [2024-06-21 19:15:31,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:31,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176492580] [2024-06-21 19:15:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:33,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176492580] [2024-06-21 19:15:33,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176492580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:33,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:33,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:33,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570025312] [2024-06-21 19:15:33,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:33,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:33,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:33,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:33,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:33,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:33,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 263 transitions, 2883 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:33,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:33,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:33,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:33,620 INFO L124 PetriNetUnfolderBase]: 582/1038 cut-off events. [2024-06-21 19:15:33,620 INFO L125 PetriNetUnfolderBase]: For 81044/81044 co-relation queries the response was YES. [2024-06-21 19:15:33,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7372 conditions, 1038 events. 582/1038 cut-off events. For 81044/81044 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5221 event pairs, 57 based on Foata normal form. 2/1038 useless extension candidates. Maximal degree in co-relation 7250. Up to 862 conditions per place. [2024-06-21 19:15:33,629 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 220 selfloop transitions, 56 changer transitions 0/278 dead transitions. [2024-06-21 19:15:33,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 278 transitions, 3643 flow [2024-06-21 19:15:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 19:15:33,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 19:15:33,631 INFO L175 Difference]: Start difference. First operand has 269 places, 263 transitions, 2883 flow. Second operand 9 states and 118 transitions. [2024-06-21 19:15:33,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 278 transitions, 3643 flow [2024-06-21 19:15:33,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 278 transitions, 3545 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:33,867 INFO L231 Difference]: Finished difference. Result has 270 places, 265 transitions, 2929 flow [2024-06-21 19:15:33,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2929, PETRI_PLACES=270, PETRI_TRANSITIONS=265} [2024-06-21 19:15:33,867 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-21 19:15:33,867 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 265 transitions, 2929 flow [2024-06-21 19:15:33,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:33,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:33,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:33,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:15:33,868 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 19:15:33,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:33,868 INFO L85 PathProgramCache]: Analyzing trace with hash -77243311, now seen corresponding path program 17 times [2024-06-21 19:15:33,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:33,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726180565] [2024-06-21 19:15:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:33,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:35,348 INFO 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 19:15:35,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:35,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726180565] [2024-06-21 19:15:35,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726180565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:35,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:35,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947293098] [2024-06-21 19:15:35,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:35,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:35,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:35,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:35,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:35,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:35,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 265 transitions, 2929 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:35,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:35,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:35,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:35,809 INFO L124 PetriNetUnfolderBase]: 579/1033 cut-off events. [2024-06-21 19:15:35,809 INFO L125 PetriNetUnfolderBase]: For 75180/75180 co-relation queries the response was YES. [2024-06-21 19:15:35,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7232 conditions, 1033 events. 579/1033 cut-off events. For 75180/75180 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 5213 event pairs, 60 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 7110. Up to 900 conditions per place. [2024-06-21 19:15:35,818 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 222 selfloop transitions, 52 changer transitions 0/276 dead transitions. [2024-06-21 19:15:35,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 276 transitions, 3503 flow [2024-06-21 19:15:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 19:15:35,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 19:15:35,819 INFO L175 Difference]: Start difference. First operand has 270 places, 265 transitions, 2929 flow. Second operand 9 states and 116 transitions. [2024-06-21 19:15:35,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 276 transitions, 3503 flow [2024-06-21 19:15:36,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 276 transitions, 3423 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:36,005 INFO L231 Difference]: Finished difference. Result has 273 places, 265 transitions, 2959 flow [2024-06-21 19:15:36,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2959, PETRI_PLACES=273, PETRI_TRANSITIONS=265} [2024-06-21 19:15:36,006 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-21 19:15:36,006 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 265 transitions, 2959 flow [2024-06-21 19:15:36,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:36,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:36,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:36,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:15:36,006 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 19:15:36,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash -77243156, now seen corresponding path program 18 times [2024-06-21 19:15:36,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:36,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063704837] [2024-06-21 19:15:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:36,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:37,377 INFO 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 19:15:37,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:37,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063704837] [2024-06-21 19:15:37,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063704837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:37,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:37,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:37,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392610674] [2024-06-21 19:15:37,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:37,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:37,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:37,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:37,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:37,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:37,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 265 transitions, 2959 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:37,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:37,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:37,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:37,744 INFO L124 PetriNetUnfolderBase]: 582/1038 cut-off events. [2024-06-21 19:15:37,744 INFO L125 PetriNetUnfolderBase]: For 72121/72121 co-relation queries the response was YES. [2024-06-21 19:15:37,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7334 conditions, 1038 events. 582/1038 cut-off events. For 72121/72121 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 5207 event pairs, 64 based on Foata normal form. 1/1037 useless extension candidates. Maximal degree in co-relation 7211. Up to 846 conditions per place. [2024-06-21 19:15:37,754 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 197 selfloop transitions, 78 changer transitions 0/277 dead transitions. [2024-06-21 19:15:37,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 277 transitions, 3563 flow [2024-06-21 19:15:37,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 19:15:37,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-21 19:15:37,755 INFO L175 Difference]: Start difference. First operand has 273 places, 265 transitions, 2959 flow. Second operand 9 states and 120 transitions. [2024-06-21 19:15:37,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 277 transitions, 3563 flow [2024-06-21 19:15:37,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 277 transitions, 3445 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 19:15:37,952 INFO L231 Difference]: Finished difference. Result has 273 places, 267 transitions, 3039 flow [2024-06-21 19:15:37,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3039, PETRI_PLACES=273, PETRI_TRANSITIONS=267} [2024-06-21 19:15:37,952 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-21 19:15:37,953 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 267 transitions, 3039 flow [2024-06-21 19:15:37,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:37,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:37,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:37,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:15:37,953 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 19:15:37,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1219485023, now seen corresponding path program 18 times [2024-06-21 19:15:37,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:37,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589210967] [2024-06-21 19:15:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:37,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:39,420 INFO 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 19:15:39,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:39,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589210967] [2024-06-21 19:15:39,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589210967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:39,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:39,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:39,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827553304] [2024-06-21 19:15:39,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:39,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:39,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:39,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:39,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:39,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:39,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 267 transitions, 3039 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:39,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:39,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:39,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:39,938 INFO L124 PetriNetUnfolderBase]: 586/1047 cut-off events. [2024-06-21 19:15:39,938 INFO L125 PetriNetUnfolderBase]: For 75298/75298 co-relation queries the response was YES. [2024-06-21 19:15:39,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7419 conditions, 1047 events. 586/1047 cut-off events. For 75298/75298 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 5302 event pairs, 33 based on Foata normal form. 2/1047 useless extension candidates. Maximal degree in co-relation 7296. Up to 806 conditions per place. [2024-06-21 19:15:39,947 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 214 selfloop transitions, 71 changer transitions 0/287 dead transitions. [2024-06-21 19:15:39,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 287 transitions, 3837 flow [2024-06-21 19:15:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-21 19:15:39,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44802867383512546 [2024-06-21 19:15:39,948 INFO L175 Difference]: Start difference. First operand has 273 places, 267 transitions, 3039 flow. Second operand 9 states and 125 transitions. [2024-06-21 19:15:39,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 287 transitions, 3837 flow [2024-06-21 19:15:40,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 287 transitions, 3662 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:40,166 INFO L231 Difference]: Finished difference. Result has 274 places, 268 transitions, 3027 flow [2024-06-21 19:15:40,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3027, PETRI_PLACES=274, PETRI_TRANSITIONS=268} [2024-06-21 19:15:40,166 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2024-06-21 19:15:40,166 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 268 transitions, 3027 flow [2024-06-21 19:15:40,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:40,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:40,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:40,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:15:40,167 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 19:15:40,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:40,167 INFO L85 PathProgramCache]: Analyzing trace with hash 471436733, now seen corresponding path program 19 times [2024-06-21 19:15:40,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:40,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599450032] [2024-06-21 19:15:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:40,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:41,578 INFO 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 19:15:41,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:41,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599450032] [2024-06-21 19:15:41,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599450032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:41,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:41,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646737899] [2024-06-21 19:15:41,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:41,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:41,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:41,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 268 transitions, 3027 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:41,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:41,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:41,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:42,018 INFO L124 PetriNetUnfolderBase]: 590/1055 cut-off events. [2024-06-21 19:15:42,019 INFO L125 PetriNetUnfolderBase]: For 75398/75398 co-relation queries the response was YES. [2024-06-21 19:15:42,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7467 conditions, 1055 events. 590/1055 cut-off events. For 75398/75398 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 5401 event pairs, 58 based on Foata normal form. 2/1055 useless extension candidates. Maximal degree in co-relation 7344. Up to 895 conditions per place. [2024-06-21 19:15:42,028 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 220 selfloop transitions, 64 changer transitions 0/286 dead transitions. [2024-06-21 19:15:42,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 286 transitions, 3665 flow [2024-06-21 19:15:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:42,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-21 19:15:42,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-21 19:15:42,029 INFO L175 Difference]: Start difference. First operand has 274 places, 268 transitions, 3027 flow. Second operand 9 states and 123 transitions. [2024-06-21 19:15:42,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 286 transitions, 3665 flow [2024-06-21 19:15:42,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 286 transitions, 3412 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 19:15:42,223 INFO L231 Difference]: Finished difference. Result has 273 places, 269 transitions, 2925 flow [2024-06-21 19:15:42,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2780, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2925, PETRI_PLACES=273, PETRI_TRANSITIONS=269} [2024-06-21 19:15:42,223 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-21 19:15:42,223 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 269 transitions, 2925 flow [2024-06-21 19:15:42,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:42,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:42,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:42,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:15:42,224 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 19:15:42,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash 471436888, now seen corresponding path program 19 times [2024-06-21 19:15:42,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:42,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756171385] [2024-06-21 19:15:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:42,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:43,479 INFO 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 19:15:43,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:43,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756171385] [2024-06-21 19:15:43,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756171385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:43,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:43,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956620592] [2024-06-21 19:15:43,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:43,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:43,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:43,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 269 transitions, 2925 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:43,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:43,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:43,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:43,920 INFO L124 PetriNetUnfolderBase]: 593/1060 cut-off events. [2024-06-21 19:15:43,920 INFO L125 PetriNetUnfolderBase]: For 72155/72155 co-relation queries the response was YES. [2024-06-21 19:15:43,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7244 conditions, 1060 events. 593/1060 cut-off events. For 72155/72155 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 5414 event pairs, 61 based on Foata normal form. 1/1059 useless extension candidates. Maximal degree in co-relation 7123. Up to 814 conditions per place. [2024-06-21 19:15:43,929 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 102 changer transitions 0/288 dead transitions. [2024-06-21 19:15:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 288 transitions, 3742 flow [2024-06-21 19:15:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-21 19:15:43,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45878136200716846 [2024-06-21 19:15:43,930 INFO L175 Difference]: Start difference. First operand has 273 places, 269 transitions, 2925 flow. Second operand 9 states and 128 transitions. [2024-06-21 19:15:43,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 288 transitions, 3742 flow [2024-06-21 19:15:44,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 288 transitions, 3608 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:44,113 INFO L231 Difference]: Finished difference. Result has 274 places, 271 transitions, 3039 flow [2024-06-21 19:15:44,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3039, PETRI_PLACES=274, PETRI_TRANSITIONS=271} [2024-06-21 19:15:44,113 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2024-06-21 19:15:44,113 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 271 transitions, 3039 flow [2024-06-21 19:15:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 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 19:15:44,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:44,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:44,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:15:44,114 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 19:15:44,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:44,114 INFO L85 PathProgramCache]: Analyzing trace with hash 477150808, now seen corresponding path program 20 times [2024-06-21 19:15:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:44,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280032667] [2024-06-21 19:15:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:44,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:45,511 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 19:15:45,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:45,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280032667] [2024-06-21 19:15:45,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280032667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:45,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:45,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:45,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929173990] [2024-06-21 19:15:45,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:45,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:45,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:45,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:45,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:45,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 271 transitions, 3039 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:45,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:45,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:45,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:46,007 INFO L124 PetriNetUnfolderBase]: 596/1064 cut-off events. [2024-06-21 19:15:46,007 INFO L125 PetriNetUnfolderBase]: For 72380/72380 co-relation queries the response was YES. [2024-06-21 19:15:46,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7363 conditions, 1064 events. 596/1064 cut-off events. For 72380/72380 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 5417 event pairs, 61 based on Foata normal form. 1/1063 useless extension candidates. Maximal degree in co-relation 7242. Up to 902 conditions per place. [2024-06-21 19:15:46,017 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 217 selfloop transitions, 65 changer transitions 0/284 dead transitions. [2024-06-21 19:15:46,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 284 transitions, 3675 flow [2024-06-21 19:15:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 19:15:46,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:15:46,018 INFO L175 Difference]: Start difference. First operand has 274 places, 271 transitions, 3039 flow. Second operand 9 states and 117 transitions. [2024-06-21 19:15:46,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 284 transitions, 3675 flow [2024-06-21 19:15:46,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 284 transitions, 3416 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:46,205 INFO L231 Difference]: Finished difference. Result has 275 places, 274 transitions, 2970 flow [2024-06-21 19:15:46,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2970, PETRI_PLACES=275, PETRI_TRANSITIONS=274} [2024-06-21 19:15:46,206 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2024-06-21 19:15:46,206 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 274 transitions, 2970 flow [2024-06-21 19:15:46,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:46,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:46,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:46,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:15:46,206 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 19:15:46,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:46,207 INFO L85 PathProgramCache]: Analyzing trace with hash 476943263, now seen corresponding path program 20 times [2024-06-21 19:15:46,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:46,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793315408] [2024-06-21 19:15:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:46,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:47,569 INFO 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 19:15:47,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793315408] [2024-06-21 19:15:47,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793315408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:47,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:47,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:47,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62049485] [2024-06-21 19:15:47,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:47,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:47,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:47,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:47,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 274 transitions, 2970 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:47,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:47,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:47,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:48,057 INFO L124 PetriNetUnfolderBase]: 600/1072 cut-off events. [2024-06-21 19:15:48,057 INFO L125 PetriNetUnfolderBase]: For 75245/75245 co-relation queries the response was YES. [2024-06-21 19:15:48,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7291 conditions, 1072 events. 600/1072 cut-off events. For 75245/75245 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 5485 event pairs, 60 based on Foata normal form. 2/1072 useless extension candidates. Maximal degree in co-relation 7170. Up to 951 conditions per place. [2024-06-21 19:15:48,067 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 241 selfloop transitions, 43 changer transitions 0/286 dead transitions. [2024-06-21 19:15:48,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 286 transitions, 3575 flow [2024-06-21 19:15:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 19:15:48,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 19:15:48,070 INFO L175 Difference]: Start difference. First operand has 275 places, 274 transitions, 2970 flow. Second operand 9 states and 114 transitions. [2024-06-21 19:15:48,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 286 transitions, 3575 flow [2024-06-21 19:15:48,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 286 transitions, 3461 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:48,242 INFO L231 Difference]: Finished difference. Result has 279 places, 275 transitions, 2961 flow [2024-06-21 19:15:48,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2961, PETRI_PLACES=279, PETRI_TRANSITIONS=275} [2024-06-21 19:15:48,243 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 249 predicate places. [2024-06-21 19:15:48,243 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 275 transitions, 2961 flow [2024-06-21 19:15:48,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:48,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:48,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:48,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:15:48,243 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 19:15:48,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 471581038, now seen corresponding path program 21 times [2024-06-21 19:15:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:48,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219161161] [2024-06-21 19:15:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:48,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:49,642 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 19:15:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219161161] [2024-06-21 19:15:49,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219161161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:49,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:49,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:49,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143507093] [2024-06-21 19:15:49,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:49,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:49,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:49,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 275 transitions, 2961 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:49,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:49,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:49,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:50,127 INFO L124 PetriNetUnfolderBase]: 608/1088 cut-off events. [2024-06-21 19:15:50,128 INFO L125 PetriNetUnfolderBase]: For 77221/77221 co-relation queries the response was YES. [2024-06-21 19:15:50,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7485 conditions, 1088 events. 608/1088 cut-off events. For 77221/77221 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5582 event pairs, 80 based on Foata normal form. 1/1087 useless extension candidates. Maximal degree in co-relation 7363. Up to 910 conditions per place. [2024-06-21 19:15:50,138 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 213 selfloop transitions, 78 changer transitions 0/293 dead transitions. [2024-06-21 19:15:50,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 293 transitions, 3820 flow [2024-06-21 19:15:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-21 19:15:50,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:15:50,139 INFO L175 Difference]: Start difference. First operand has 279 places, 275 transitions, 2961 flow. Second operand 9 states and 124 transitions. [2024-06-21 19:15:50,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 293 transitions, 3820 flow [2024-06-21 19:15:50,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 293 transitions, 3726 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:50,321 INFO L231 Difference]: Finished difference. Result has 280 places, 279 transitions, 3113 flow [2024-06-21 19:15:50,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3113, PETRI_PLACES=280, PETRI_TRANSITIONS=279} [2024-06-21 19:15:50,322 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2024-06-21 19:15:50,322 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 279 transitions, 3113 flow [2024-06-21 19:15:50,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:50,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:50,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:50,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 19:15:50,322 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 19:15:50,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:50,322 INFO L85 PathProgramCache]: Analyzing trace with hash 471580883, now seen corresponding path program 21 times [2024-06-21 19:15:50,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:50,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107090113] [2024-06-21 19:15:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:50,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:51,708 INFO 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 19:15:51,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:51,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107090113] [2024-06-21 19:15:51,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107090113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:51,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:51,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:51,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104783498] [2024-06-21 19:15:51,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:51,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:51,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:51,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:51,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 279 transitions, 3113 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:51,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:51,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:51,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:52,240 INFO L124 PetriNetUnfolderBase]: 605/1083 cut-off events. [2024-06-21 19:15:52,240 INFO L125 PetriNetUnfolderBase]: For 74219/74219 co-relation queries the response was YES. [2024-06-21 19:15:52,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7375 conditions, 1083 events. 605/1083 cut-off events. For 74219/74219 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5591 event pairs, 78 based on Foata normal form. 2/1083 useless extension candidates. Maximal degree in co-relation 7253. Up to 959 conditions per place. [2024-06-21 19:15:52,250 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 241 selfloop transitions, 50 changer transitions 0/293 dead transitions. [2024-06-21 19:15:52,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 293 transitions, 3738 flow [2024-06-21 19:15:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 19:15:52,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 19:15:52,250 INFO L175 Difference]: Start difference. First operand has 280 places, 279 transitions, 3113 flow. Second operand 9 states and 118 transitions. [2024-06-21 19:15:52,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 293 transitions, 3738 flow [2024-06-21 19:15:52,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 293 transitions, 3611 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:52,432 INFO L231 Difference]: Finished difference. Result has 283 places, 279 transitions, 3092 flow [2024-06-21 19:15:52,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3092, PETRI_PLACES=283, PETRI_TRANSITIONS=279} [2024-06-21 19:15:52,433 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 253 predicate places. [2024-06-21 19:15:52,433 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 279 transitions, 3092 flow [2024-06-21 19:15:52,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:52,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:52,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:52,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 19:15:52,434 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 19:15:52,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:52,434 INFO L85 PathProgramCache]: Analyzing trace with hash 471586835, now seen corresponding path program 2 times [2024-06-21 19:15:52,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:52,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748387769] [2024-06-21 19:15:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:52,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:54,019 INFO 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 19:15:54,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:54,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748387769] [2024-06-21 19:15:54,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748387769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:54,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:54,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:54,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110897586] [2024-06-21 19:15:54,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:54,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:54,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:54,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:54,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 279 transitions, 3092 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 19:15:54,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:54,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:54,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:54,723 INFO L124 PetriNetUnfolderBase]: 611/1090 cut-off events. [2024-06-21 19:15:54,723 INFO L125 PetriNetUnfolderBase]: For 70740/70740 co-relation queries the response was YES. [2024-06-21 19:15:54,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7438 conditions, 1090 events. 611/1090 cut-off events. For 70740/70740 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 5591 event pairs, 66 based on Foata normal form. 2/1090 useless extension candidates. Maximal degree in co-relation 7315. Up to 802 conditions per place. [2024-06-21 19:15:54,732 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 213 selfloop transitions, 82 changer transitions 0/297 dead transitions. [2024-06-21 19:15:54,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 297 transitions, 3897 flow [2024-06-21 19:15:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 19:15:54,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 19:15:54,733 INFO L175 Difference]: Start difference. First operand has 283 places, 279 transitions, 3092 flow. Second operand 10 states and 133 transitions. [2024-06-21 19:15:54,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 297 transitions, 3897 flow [2024-06-21 19:15:54,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 297 transitions, 3707 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 19:15:54,939 INFO L231 Difference]: Finished difference. Result has 283 places, 282 transitions, 3092 flow [2024-06-21 19:15:54,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3092, PETRI_PLACES=283, PETRI_TRANSITIONS=282} [2024-06-21 19:15:54,939 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 253 predicate places. [2024-06-21 19:15:54,939 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 282 transitions, 3092 flow [2024-06-21 19:15:54,939 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 19:15:54,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:54,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:54,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 19:15:54,939 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 19:15:54,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash 471586618, now seen corresponding path program 22 times [2024-06-21 19:15:54,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:54,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326326933] [2024-06-21 19:15:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:54,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:56,314 INFO 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 19:15:56,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326326933] [2024-06-21 19:15:56,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326326933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:56,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:56,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:56,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750938239] [2024-06-21 19:15:56,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:56,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:56,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:56,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:56,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:56,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:15:56,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 282 transitions, 3092 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:56,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:56,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:15:56,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:56,789 INFO L124 PetriNetUnfolderBase]: 609/1090 cut-off events. [2024-06-21 19:15:56,789 INFO L125 PetriNetUnfolderBase]: For 67851/67851 co-relation queries the response was YES. [2024-06-21 19:15:56,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7312 conditions, 1090 events. 609/1090 cut-off events. For 67851/67851 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 5614 event pairs, 79 based on Foata normal form. 1/1089 useless extension candidates. Maximal degree in co-relation 7189. Up to 925 conditions per place. [2024-06-21 19:15:56,798 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 221 selfloop transitions, 72 changer transitions 0/295 dead transitions. [2024-06-21 19:15:56,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 295 transitions, 3721 flow [2024-06-21 19:15:56,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 121 transitions. [2024-06-21 19:15:56,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336917562724014 [2024-06-21 19:15:56,799 INFO L175 Difference]: Start difference. First operand has 283 places, 282 transitions, 3092 flow. Second operand 9 states and 121 transitions. [2024-06-21 19:15:56,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 295 transitions, 3721 flow [2024-06-21 19:15:56,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 295 transitions, 3551 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:56,963 INFO L231 Difference]: Finished difference. Result has 285 places, 282 transitions, 3076 flow [2024-06-21 19:15:56,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3076, PETRI_PLACES=285, PETRI_TRANSITIONS=282} [2024-06-21 19:15:56,963 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 255 predicate places. [2024-06-21 19:15:56,963 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 282 transitions, 3076 flow [2024-06-21 19:15:56,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:56,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:56,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:56,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 19:15:56,964 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 19:15:56,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash 477151025, now seen corresponding path program 3 times [2024-06-21 19:15:56,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:56,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681670911] [2024-06-21 19:15:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:56,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:58,547 INFO 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 19:15:58,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:58,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681670911] [2024-06-21 19:15:58,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681670911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:58,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:58,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:58,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608425689] [2024-06-21 19:15:58,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:58,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:58,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:58,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:58,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:58,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 282 transitions, 3076 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 19:15:58,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:58,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:58,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:59,174 INFO L124 PetriNetUnfolderBase]: 626/1115 cut-off events. [2024-06-21 19:15:59,174 INFO L125 PetriNetUnfolderBase]: For 72403/72403 co-relation queries the response was YES. [2024-06-21 19:15:59,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7486 conditions, 1115 events. 626/1115 cut-off events. For 72403/72403 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5723 event pairs, 61 based on Foata normal form. 2/1115 useless extension candidates. Maximal degree in co-relation 7362. Up to 816 conditions per place. [2024-06-21 19:15:59,184 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 216 selfloop transitions, 88 changer transitions 0/306 dead transitions. [2024-06-21 19:15:59,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 306 transitions, 4102 flow [2024-06-21 19:15:59,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 19:15:59,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:15:59,185 INFO L175 Difference]: Start difference. First operand has 285 places, 282 transitions, 3076 flow. Second operand 10 states and 130 transitions. [2024-06-21 19:15:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 306 transitions, 4102 flow [2024-06-21 19:15:59,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 306 transitions, 3956 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:59,369 INFO L231 Difference]: Finished difference. Result has 288 places, 289 transitions, 3161 flow [2024-06-21 19:15:59,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3161, PETRI_PLACES=288, PETRI_TRANSITIONS=289} [2024-06-21 19:15:59,369 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-21 19:15:59,370 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 289 transitions, 3161 flow [2024-06-21 19:15:59,370 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 19:15:59,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:59,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:59,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 19:15:59,370 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 19:15:59,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash 477158465, now seen corresponding path program 4 times [2024-06-21 19:15:59,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212088798] [2024-06-21 19:15:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:00,982 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 19:16:00,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:00,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212088798] [2024-06-21 19:16:00,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212088798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:00,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:00,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:16:00,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049401138] [2024-06-21 19:16:00,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:00,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:16:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:16:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:16:01,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:01,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 289 transitions, 3161 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 19:16:01,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:01,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:01,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:01,598 INFO L124 PetriNetUnfolderBase]: 621/1108 cut-off events. [2024-06-21 19:16:01,598 INFO L125 PetriNetUnfolderBase]: For 71106/71106 co-relation queries the response was YES. [2024-06-21 19:16:01,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7437 conditions, 1108 events. 621/1108 cut-off events. For 71106/71106 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 5705 event pairs, 61 based on Foata normal form. 2/1108 useless extension candidates. Maximal degree in co-relation 7312. Up to 811 conditions per place. [2024-06-21 19:16:01,608 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 211 selfloop transitions, 89 changer transitions 0/302 dead transitions. [2024-06-21 19:16:01,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 302 transitions, 3949 flow [2024-06-21 19:16:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 19:16:01,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 19:16:01,609 INFO L175 Difference]: Start difference. First operand has 288 places, 289 transitions, 3161 flow. Second operand 10 states and 127 transitions. [2024-06-21 19:16:01,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 302 transitions, 3949 flow [2024-06-21 19:16:01,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 302 transitions, 3804 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:01,808 INFO L231 Difference]: Finished difference. Result has 292 places, 288 transitions, 3192 flow [2024-06-21 19:16:01,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3192, PETRI_PLACES=292, PETRI_TRANSITIONS=288} [2024-06-21 19:16:01,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2024-06-21 19:16:01,808 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 288 transitions, 3192 flow [2024-06-21 19:16:01,808 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 19:16:01,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:01,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:01,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 19:16:01,809 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 19:16:01,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:01,809 INFO L85 PathProgramCache]: Analyzing trace with hash 476948998, now seen corresponding path program 23 times [2024-06-21 19:16:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:01,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451678030] [2024-06-21 19:16:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:01,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:03,142 INFO 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 19:16:03,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:03,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451678030] [2024-06-21 19:16:03,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451678030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:03,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:03,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:03,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132077572] [2024-06-21 19:16:03,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:03,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:03,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:03,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:16:03,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 288 transitions, 3192 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:03,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:03,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:16:03,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:03,620 INFO L124 PetriNetUnfolderBase]: 624/1112 cut-off events. [2024-06-21 19:16:03,620 INFO L125 PetriNetUnfolderBase]: For 73023/73023 co-relation queries the response was YES. [2024-06-21 19:16:03,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7532 conditions, 1112 events. 624/1112 cut-off events. For 73023/73023 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 5734 event pairs, 60 based on Foata normal form. 1/1111 useless extension candidates. Maximal degree in co-relation 7406. Up to 950 conditions per place. [2024-06-21 19:16:03,630 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 235 selfloop transitions, 63 changer transitions 0/300 dead transitions. [2024-06-21 19:16:03,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 300 transitions, 3854 flow [2024-06-21 19:16:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:16:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:16:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 19:16:03,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 19:16:03,631 INFO L175 Difference]: Start difference. First operand has 292 places, 288 transitions, 3192 flow. Second operand 9 states and 118 transitions. [2024-06-21 19:16:03,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 300 transitions, 3854 flow [2024-06-21 19:16:03,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 300 transitions, 3688 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:03,856 INFO L231 Difference]: Finished difference. Result has 293 places, 290 transitions, 3206 flow [2024-06-21 19:16:03,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3206, PETRI_PLACES=293, PETRI_TRANSITIONS=290} [2024-06-21 19:16:03,856 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 263 predicate places. [2024-06-21 19:16:03,856 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 290 transitions, 3206 flow [2024-06-21 19:16:03,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:03,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:03,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:03,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 19:16:03,857 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 19:16:03,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:03,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1072779414, now seen corresponding path program 24 times [2024-06-21 19:16:03,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:03,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014846339] [2024-06-21 19:16:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:03,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:05,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:05,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014846339] [2024-06-21 19:16:05,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014846339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:05,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:05,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:05,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875563328] [2024-06-21 19:16:05,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:05,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:05,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:05,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:05,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:05,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:16:05,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 290 transitions, 3206 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:05,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:05,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:16:05,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:05,689 INFO L124 PetriNetUnfolderBase]: 622/1109 cut-off events. [2024-06-21 19:16:05,689 INFO L125 PetriNetUnfolderBase]: For 71214/71214 co-relation queries the response was YES. [2024-06-21 19:16:05,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7402 conditions, 1109 events. 622/1109 cut-off events. For 71214/71214 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 5704 event pairs, 60 based on Foata normal form. 1/1108 useless extension candidates. Maximal degree in co-relation 7275. Up to 929 conditions per place. [2024-06-21 19:16:05,700 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 225 selfloop transitions, 73 changer transitions 0/300 dead transitions. [2024-06-21 19:16:05,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 300 transitions, 3826 flow [2024-06-21 19:16:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:16:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:16:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-21 19:16:05,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-21 19:16:05,701 INFO L175 Difference]: Start difference. First operand has 293 places, 290 transitions, 3206 flow. Second operand 9 states and 119 transitions. [2024-06-21 19:16:05,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 300 transitions, 3826 flow [2024-06-21 19:16:05,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 300 transitions, 3672 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:05,939 INFO L231 Difference]: Finished difference. Result has 296 places, 290 transitions, 3206 flow [2024-06-21 19:16:05,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3052, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3206, PETRI_PLACES=296, PETRI_TRANSITIONS=290} [2024-06-21 19:16:05,939 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-21 19:16:05,939 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 290 transitions, 3206 flow [2024-06-21 19:16:05,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:16:05,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:05,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:05,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 19:16:05,940 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 19:16:05,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash 476949215, now seen corresponding path program 5 times [2024-06-21 19:16:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:05,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632189531] [2024-06-21 19:16:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:05,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:07,558 INFO 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 19:16:07,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:07,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632189531] [2024-06-21 19:16:07,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632189531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:07,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:07,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:16:07,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673013128] [2024-06-21 19:16:07,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:07,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:16:07,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:07,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:16:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:16:07,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:07,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 290 transitions, 3206 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 19:16:07,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:07,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:07,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:08,211 INFO L124 PetriNetUnfolderBase]: 617/1102 cut-off events. [2024-06-21 19:16:08,211 INFO L125 PetriNetUnfolderBase]: For 69172/69172 co-relation queries the response was YES. [2024-06-21 19:16:08,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7304 conditions, 1102 events. 617/1102 cut-off events. For 69172/69172 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 5690 event pairs, 63 based on Foata normal form. 2/1102 useless extension candidates. Maximal degree in co-relation 7176. Up to 808 conditions per place. [2024-06-21 19:16:08,222 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 215 selfloop transitions, 85 changer transitions 0/302 dead transitions. [2024-06-21 19:16:08,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 302 transitions, 3824 flow [2024-06-21 19:16:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 19:16:08,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 19:16:08,223 INFO L175 Difference]: Start difference. First operand has 296 places, 290 transitions, 3206 flow. Second operand 10 states and 129 transitions. [2024-06-21 19:16:08,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 302 transitions, 3824 flow [2024-06-21 19:16:08,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 302 transitions, 3511 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-21 19:16:08,417 INFO L231 Difference]: Finished difference. Result has 295 places, 288 transitions, 3047 flow [2024-06-21 19:16:08,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3047, PETRI_PLACES=295, PETRI_TRANSITIONS=288} [2024-06-21 19:16:08,417 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2024-06-21 19:16:08,417 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 288 transitions, 3047 flow [2024-06-21 19:16:08,417 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 19:16:08,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:08,418 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 19:16:08,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 19:16:08,418 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 19:16:08,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1662036736, now seen corresponding path program 1 times [2024-06-21 19:16:08,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:08,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524406724] [2024-06-21 19:16:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:08,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:10,038 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 19:16:10,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524406724] [2024-06-21 19:16:10,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524406724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:10,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:10,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:10,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144892339] [2024-06-21 19:16:10,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:10,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:10,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:10,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:10,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:10,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:10,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 288 transitions, 3047 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 19:16:10,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:10,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:10,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:10,525 INFO L124 PetriNetUnfolderBase]: 667/1198 cut-off events. [2024-06-21 19:16:10,525 INFO L125 PetriNetUnfolderBase]: For 120903/120903 co-relation queries the response was YES. [2024-06-21 19:16:10,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8637 conditions, 1198 events. 667/1198 cut-off events. For 120903/120903 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 6211 event pairs, 142 based on Foata normal form. 2/1198 useless extension candidates. Maximal degree in co-relation 8511. Up to 740 conditions per place. [2024-06-21 19:16:10,535 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 235 selfloop transitions, 80 changer transitions 0/317 dead transitions. [2024-06-21 19:16:10,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 317 transitions, 4169 flow [2024-06-21 19:16:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 19:16:10,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-21 19:16:10,536 INFO L175 Difference]: Start difference. First operand has 295 places, 288 transitions, 3047 flow. Second operand 10 states and 132 transitions. [2024-06-21 19:16:10,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 317 transitions, 4169 flow [2024-06-21 19:16:10,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 317 transitions, 3946 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 19:16:10,781 INFO L231 Difference]: Finished difference. Result has 296 places, 293 transitions, 3135 flow [2024-06-21 19:16:10,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2824, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3135, PETRI_PLACES=296, PETRI_TRANSITIONS=293} [2024-06-21 19:16:10,782 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-21 19:16:10,782 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 293 transitions, 3135 flow [2024-06-21 19:16:10,782 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 19:16:10,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:10,782 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 19:16:10,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 19:16:10,782 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 19:16:10,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:10,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1720249156, now seen corresponding path program 2 times [2024-06-21 19:16:10,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:10,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073236775] [2024-06-21 19:16:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:10,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:12,249 INFO 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 19:16:12,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:12,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073236775] [2024-06-21 19:16:12,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073236775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:12,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:12,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:12,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143791128] [2024-06-21 19:16:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:12,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:12,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:12,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:12,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:12,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:12,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 293 transitions, 3135 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 19:16:12,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:12,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:12,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:12,728 INFO L124 PetriNetUnfolderBase]: 671/1206 cut-off events. [2024-06-21 19:16:12,729 INFO L125 PetriNetUnfolderBase]: For 124055/124055 co-relation queries the response was YES. [2024-06-21 19:16:12,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8888 conditions, 1206 events. 671/1206 cut-off events. For 124055/124055 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6278 event pairs, 162 based on Foata normal form. 2/1206 useless extension candidates. Maximal degree in co-relation 8759. Up to 1021 conditions per place. [2024-06-21 19:16:12,740 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 230 selfloop transitions, 74 changer transitions 0/306 dead transitions. [2024-06-21 19:16:12,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 306 transitions, 3783 flow [2024-06-21 19:16:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:12,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 19:16:12,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 19:16:12,741 INFO L175 Difference]: Start difference. First operand has 296 places, 293 transitions, 3135 flow. Second operand 10 states and 118 transitions. [2024-06-21 19:16:12,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 306 transitions, 3783 flow [2024-06-21 19:16:13,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 306 transitions, 3753 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 19:16:13,029 INFO L231 Difference]: Finished difference. Result has 302 places, 294 transitions, 3269 flow [2024-06-21 19:16:13,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3269, PETRI_PLACES=302, PETRI_TRANSITIONS=294} [2024-06-21 19:16:13,030 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2024-06-21 19:16:13,030 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 294 transitions, 3269 flow [2024-06-21 19:16:13,030 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 19:16:13,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:13,030 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 19:16:13,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 19:16:13,030 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 19:16:13,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1720249342, now seen corresponding path program 1 times [2024-06-21 19:16:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:13,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074386716] [2024-06-21 19:16:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:13,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:14,695 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 19:16:14,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:14,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074386716] [2024-06-21 19:16:14,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074386716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:14,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:14,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433595773] [2024-06-21 19:16:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:14,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:14,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:14,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:14,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 294 transitions, 3269 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 19:16:14,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:14,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:14,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:15,247 INFO L124 PetriNetUnfolderBase]: 687/1232 cut-off events. [2024-06-21 19:16:15,247 INFO L125 PetriNetUnfolderBase]: For 134430/134430 co-relation queries the response was YES. [2024-06-21 19:16:15,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9403 conditions, 1232 events. 687/1232 cut-off events. For 134430/134430 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 6416 event pairs, 158 based on Foata normal form. 2/1232 useless extension candidates. Maximal degree in co-relation 9272. Up to 853 conditions per place. [2024-06-21 19:16:15,259 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 215 selfloop transitions, 95 changer transitions 0/312 dead transitions. [2024-06-21 19:16:15,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 312 transitions, 4179 flow [2024-06-21 19:16:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 19:16:15,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:16:15,260 INFO L175 Difference]: Start difference. First operand has 302 places, 294 transitions, 3269 flow. Second operand 11 states and 132 transitions. [2024-06-21 19:16:15,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 312 transitions, 4179 flow [2024-06-21 19:16:15,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 312 transitions, 4029 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:15,610 INFO L231 Difference]: Finished difference. Result has 305 places, 298 transitions, 3394 flow [2024-06-21 19:16:15,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3394, PETRI_PLACES=305, PETRI_TRANSITIONS=298} [2024-06-21 19:16:15,610 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2024-06-21 19:16:15,610 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 298 transitions, 3394 flow [2024-06-21 19:16:15,610 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 19:16:15,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:15,611 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 19:16:15,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 19:16:15,611 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 19:16:15,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1720244506, now seen corresponding path program 3 times [2024-06-21 19:16:15,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:15,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724182906] [2024-06-21 19:16:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:15,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:17,235 INFO 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 19:16:17,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:17,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724182906] [2024-06-21 19:16:17,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724182906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:17,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:17,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:17,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004200123] [2024-06-21 19:16:17,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:17,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:17,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:17,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:17,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:17,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 298 transitions, 3394 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 19:16:17,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:17,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:17,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:17,721 INFO L124 PetriNetUnfolderBase]: 691/1240 cut-off events. [2024-06-21 19:16:17,721 INFO L125 PetriNetUnfolderBase]: For 137778/137778 co-relation queries the response was YES. [2024-06-21 19:16:17,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9561 conditions, 1240 events. 691/1240 cut-off events. For 137778/137778 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6478 event pairs, 165 based on Foata normal form. 2/1240 useless extension candidates. Maximal degree in co-relation 9429. Up to 1041 conditions per place. [2024-06-21 19:16:17,733 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 235 selfloop transitions, 75 changer transitions 0/312 dead transitions. [2024-06-21 19:16:17,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 312 transitions, 4056 flow [2024-06-21 19:16:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 19:16:17,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:16:17,734 INFO L175 Difference]: Start difference. First operand has 305 places, 298 transitions, 3394 flow. Second operand 10 states and 120 transitions. [2024-06-21 19:16:17,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 312 transitions, 4056 flow [2024-06-21 19:16:18,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 312 transitions, 3944 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:18,126 INFO L231 Difference]: Finished difference. Result has 308 places, 299 transitions, 3448 flow [2024-06-21 19:16:18,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3282, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3448, PETRI_PLACES=308, PETRI_TRANSITIONS=299} [2024-06-21 19:16:18,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 278 predicate places. [2024-06-21 19:16:18,126 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 299 transitions, 3448 flow [2024-06-21 19:16:18,127 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 19:16:18,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:18,127 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 19:16:18,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 19:16:18,127 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 19:16:18,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2024074372, now seen corresponding path program 4 times [2024-06-21 19:16:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:18,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087743715] [2024-06-21 19:16:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:18,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:19,681 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 19:16:19,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:19,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087743715] [2024-06-21 19:16:19,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087743715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:19,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:19,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:19,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403213294] [2024-06-21 19:16:19,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:19,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:19,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:19,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:19,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:19,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:19,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 299 transitions, 3448 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 19:16:19,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:19,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:19,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:20,245 INFO L124 PetriNetUnfolderBase]: 695/1248 cut-off events. [2024-06-21 19:16:20,245 INFO L125 PetriNetUnfolderBase]: For 141452/141452 co-relation queries the response was YES. [2024-06-21 19:16:20,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9698 conditions, 1248 events. 695/1248 cut-off events. For 141452/141452 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6538 event pairs, 155 based on Foata normal form. 2/1248 useless extension candidates. Maximal degree in co-relation 9564. Up to 1009 conditions per place. [2024-06-21 19:16:20,258 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 234 selfloop transitions, 81 changer transitions 0/317 dead transitions. [2024-06-21 19:16:20,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 317 transitions, 4317 flow [2024-06-21 19:16:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 19:16:20,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 19:16:20,259 INFO L175 Difference]: Start difference. First operand has 308 places, 299 transitions, 3448 flow. Second operand 11 states and 133 transitions. [2024-06-21 19:16:20,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 317 transitions, 4317 flow [2024-06-21 19:16:20,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 317 transitions, 4163 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:20,676 INFO L231 Difference]: Finished difference. Result has 311 places, 300 transitions, 3474 flow [2024-06-21 19:16:20,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3474, PETRI_PLACES=311, PETRI_TRANSITIONS=300} [2024-06-21 19:16:20,677 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 281 predicate places. [2024-06-21 19:16:20,677 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 300 transitions, 3474 flow [2024-06-21 19:16:20,677 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 19:16:20,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:20,677 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 19:16:20,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 19:16:20,677 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 19:16:20,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:20,677 INFO L85 PathProgramCache]: Analyzing trace with hash 583115440, now seen corresponding path program 2 times [2024-06-21 19:16:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:20,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761371423] [2024-06-21 19:16:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:20,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:22,291 INFO 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 19:16:22,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:22,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761371423] [2024-06-21 19:16:22,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761371423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:22,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:22,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:22,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482212786] [2024-06-21 19:16:22,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:22,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:22,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:22,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:22,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:22,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:22,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 300 transitions, 3474 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 19:16:22,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:22,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:22,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:22,931 INFO L124 PetriNetUnfolderBase]: 701/1258 cut-off events. [2024-06-21 19:16:22,931 INFO L125 PetriNetUnfolderBase]: For 144623/144623 co-relation queries the response was YES. [2024-06-21 19:16:22,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9832 conditions, 1258 events. 701/1258 cut-off events. For 144623/144623 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6580 event pairs, 167 based on Foata normal form. 2/1258 useless extension candidates. Maximal degree in co-relation 9697. Up to 1049 conditions per place. [2024-06-21 19:16:22,943 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 250 selfloop transitions, 62 changer transitions 0/314 dead transitions. [2024-06-21 19:16:22,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 314 transitions, 4173 flow [2024-06-21 19:16:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 19:16:22,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 19:16:22,944 INFO L175 Difference]: Start difference. First operand has 311 places, 300 transitions, 3474 flow. Second operand 11 states and 129 transitions. [2024-06-21 19:16:22,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 314 transitions, 4173 flow [2024-06-21 19:16:23,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 314 transitions, 4002 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:23,360 INFO L231 Difference]: Finished difference. Result has 313 places, 302 transitions, 3475 flow [2024-06-21 19:16:23,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3475, PETRI_PLACES=313, PETRI_TRANSITIONS=302} [2024-06-21 19:16:23,360 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-21 19:16:23,360 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 302 transitions, 3475 flow [2024-06-21 19:16:23,360 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 19:16:23,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:23,360 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 19:16:23,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 19:16:23,361 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 19:16:23,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash 117369600, now seen corresponding path program 5 times [2024-06-21 19:16:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:23,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651185880] [2024-06-21 19:16:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:24,982 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 19:16:24,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651185880] [2024-06-21 19:16:24,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651185880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:24,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:24,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:24,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092089881] [2024-06-21 19:16:24,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:24,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:24,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:25,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:25,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 302 transitions, 3475 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 19:16:25,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:25,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:25,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:25,617 INFO L124 PetriNetUnfolderBase]: 721/1302 cut-off events. [2024-06-21 19:16:25,617 INFO L125 PetriNetUnfolderBase]: For 186461/186461 co-relation queries the response was YES. [2024-06-21 19:16:25,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10010 conditions, 1302 events. 721/1302 cut-off events. For 186461/186461 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6893 event pairs, 171 based on Foata normal form. 12/1312 useless extension candidates. Maximal degree in co-relation 9874. Up to 1042 conditions per place. [2024-06-21 19:16:25,631 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 249 selfloop transitions, 60 changer transitions 9/320 dead transitions. [2024-06-21 19:16:25,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 320 transitions, 4210 flow [2024-06-21 19:16:25,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 19:16:25,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 19:16:25,632 INFO L175 Difference]: Start difference. First operand has 313 places, 302 transitions, 3475 flow. Second operand 11 states and 134 transitions. [2024-06-21 19:16:25,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 320 transitions, 4210 flow [2024-06-21 19:16:26,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 320 transitions, 4052 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 19:16:26,142 INFO L231 Difference]: Finished difference. Result has 314 places, 299 transitions, 3418 flow [2024-06-21 19:16:26,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3317, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3418, PETRI_PLACES=314, PETRI_TRANSITIONS=299} [2024-06-21 19:16:26,143 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2024-06-21 19:16:26,143 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 299 transitions, 3418 flow [2024-06-21 19:16:26,143 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 19:16:26,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:26,143 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 19:16:26,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 19:16:26,143 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 19:16:26,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash 117369786, now seen corresponding path program 3 times [2024-06-21 19:16:26,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:26,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796481879] [2024-06-21 19:16:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:26,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:27,758 INFO 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 19:16:27,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:27,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796481879] [2024-06-21 19:16:27,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796481879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:27,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:27,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:27,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233851484] [2024-06-21 19:16:27,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:27,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:27,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:27,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:27,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:27,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 299 transitions, 3418 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 19:16:27,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:27,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:27,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:28,320 INFO L124 PetriNetUnfolderBase]: 701/1262 cut-off events. [2024-06-21 19:16:28,320 INFO L125 PetriNetUnfolderBase]: For 151112/151112 co-relation queries the response was YES. [2024-06-21 19:16:28,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9856 conditions, 1262 events. 701/1262 cut-off events. For 151112/151112 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6659 event pairs, 166 based on Foata normal form. 2/1262 useless extension candidates. Maximal degree in co-relation 9720. Up to 1133 conditions per place. [2024-06-21 19:16:28,333 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 261 selfloop transitions, 50 changer transitions 0/313 dead transitions. [2024-06-21 19:16:28,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 313 transitions, 4121 flow [2024-06-21 19:16:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 19:16:28,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 19:16:28,334 INFO L175 Difference]: Start difference. First operand has 314 places, 299 transitions, 3418 flow. Second operand 10 states and 122 transitions. [2024-06-21 19:16:28,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 313 transitions, 4121 flow [2024-06-21 19:16:28,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 313 transitions, 3983 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 19:16:28,737 INFO L231 Difference]: Finished difference. Result has 313 places, 301 transitions, 3431 flow [2024-06-21 19:16:28,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3431, PETRI_PLACES=313, PETRI_TRANSITIONS=301} [2024-06-21 19:16:28,737 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-21 19:16:28,737 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 301 transitions, 3431 flow [2024-06-21 19:16:28,737 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 19:16:28,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:28,737 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 19:16:28,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 19:16:28,737 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 19:16:28,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:28,738 INFO L85 PathProgramCache]: Analyzing trace with hash 117196806, now seen corresponding path program 4 times [2024-06-21 19:16:28,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:28,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383170566] [2024-06-21 19:16:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:28,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:30,386 INFO 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 19:16:30,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:30,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383170566] [2024-06-21 19:16:30,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383170566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:30,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:30,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:30,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32325692] [2024-06-21 19:16:30,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:30,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:30,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:30,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:30,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:30,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:30,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 301 transitions, 3431 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 19:16:30,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:30,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:30,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:30,982 INFO L124 PetriNetUnfolderBase]: 707/1272 cut-off events. [2024-06-21 19:16:30,982 INFO L125 PetriNetUnfolderBase]: For 151106/151106 co-relation queries the response was YES. [2024-06-21 19:16:30,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9898 conditions, 1272 events. 707/1272 cut-off events. For 151106/151106 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6713 event pairs, 169 based on Foata normal form. 2/1272 useless extension candidates. Maximal degree in co-relation 9762. Up to 1140 conditions per place. [2024-06-21 19:16:30,996 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 264 selfloop transitions, 50 changer transitions 0/316 dead transitions. [2024-06-21 19:16:30,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 316 transitions, 4146 flow [2024-06-21 19:16:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:30,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 19:16:30,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 19:16:30,997 INFO L175 Difference]: Start difference. First operand has 313 places, 301 transitions, 3431 flow. Second operand 10 states and 123 transitions. [2024-06-21 19:16:30,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 316 transitions, 4146 flow [2024-06-21 19:16:31,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 316 transitions, 4056 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:31,423 INFO L231 Difference]: Finished difference. Result has 316 places, 303 transitions, 3492 flow [2024-06-21 19:16:31,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3492, PETRI_PLACES=316, PETRI_TRANSITIONS=303} [2024-06-21 19:16:31,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 286 predicate places. [2024-06-21 19:16:31,424 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 303 transitions, 3492 flow [2024-06-21 19:16:31,424 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 19:16:31,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:31,424 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 19:16:31,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 19:16:31,424 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 19:16:31,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:31,425 INFO L85 PathProgramCache]: Analyzing trace with hash -290804916, now seen corresponding path program 6 times [2024-06-21 19:16:31,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:31,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748251610] [2024-06-21 19:16:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:31,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:33,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:33,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748251610] [2024-06-21 19:16:33,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748251610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:33,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:33,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:33,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185791128] [2024-06-21 19:16:33,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:33,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:33,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:33,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:33,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 303 transitions, 3492 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 19:16:33,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:33,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:33,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:33,666 INFO L124 PetriNetUnfolderBase]: 711/1280 cut-off events. [2024-06-21 19:16:33,666 INFO L125 PetriNetUnfolderBase]: For 154541/154541 co-relation queries the response was YES. [2024-06-21 19:16:33,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9971 conditions, 1280 events. 711/1280 cut-off events. For 154541/154541 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 6775 event pairs, 171 based on Foata normal form. 2/1280 useless extension candidates. Maximal degree in co-relation 9834. Up to 1064 conditions per place. [2024-06-21 19:16:33,679 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 251 selfloop transitions, 63 changer transitions 0/316 dead transitions. [2024-06-21 19:16:33,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 316 transitions, 4169 flow [2024-06-21 19:16:33,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 19:16:33,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 19:16:33,680 INFO L175 Difference]: Start difference. First operand has 316 places, 303 transitions, 3492 flow. Second operand 11 states and 129 transitions. [2024-06-21 19:16:33,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 316 transitions, 4169 flow [2024-06-21 19:16:34,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 316 transitions, 4041 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:34,130 INFO L231 Difference]: Finished difference. Result has 319 places, 304 transitions, 3512 flow [2024-06-21 19:16:34,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3512, PETRI_PLACES=319, PETRI_TRANSITIONS=304} [2024-06-21 19:16:34,131 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 289 predicate places. [2024-06-21 19:16:34,131 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 304 transitions, 3512 flow [2024-06-21 19:16:34,131 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 19:16:34,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:34,131 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 19:16:34,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 19:16:34,131 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 19:16:34,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash 582931114, now seen corresponding path program 7 times [2024-06-21 19:16:34,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:34,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999824123] [2024-06-21 19:16:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:34,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:35,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:35,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999824123] [2024-06-21 19:16:35,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999824123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:35,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:35,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:35,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511246147] [2024-06-21 19:16:35,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:35,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:35,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:35,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:35,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:35,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:35,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 304 transitions, 3512 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 19:16:35,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:35,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:35,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:36,135 INFO L124 PetriNetUnfolderBase]: 715/1288 cut-off events. [2024-06-21 19:16:36,135 INFO L125 PetriNetUnfolderBase]: For 157792/157792 co-relation queries the response was YES. [2024-06-21 19:16:36,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10048 conditions, 1288 events. 715/1288 cut-off events. For 157792/157792 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 6835 event pairs, 166 based on Foata normal form. 2/1288 useless extension candidates. Maximal degree in co-relation 9910. Up to 1151 conditions per place. [2024-06-21 19:16:36,148 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 268 selfloop transitions, 47 changer transitions 0/317 dead transitions. [2024-06-21 19:16:36,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 317 transitions, 4188 flow [2024-06-21 19:16:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 19:16:36,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 19:16:36,149 INFO L175 Difference]: Start difference. First operand has 319 places, 304 transitions, 3512 flow. Second operand 10 states and 119 transitions. [2024-06-21 19:16:36,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 317 transitions, 4188 flow [2024-06-21 19:16:36,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 317 transitions, 4052 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:36,595 INFO L231 Difference]: Finished difference. Result has 320 places, 305 transitions, 3494 flow [2024-06-21 19:16:36,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3494, PETRI_PLACES=320, PETRI_TRANSITIONS=305} [2024-06-21 19:16:36,596 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-06-21 19:16:36,596 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 305 transitions, 3494 flow [2024-06-21 19:16:36,596 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 19:16:36,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:36,596 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 19:16:36,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 19:16:36,596 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 19:16:36,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash 112727970, now seen corresponding path program 8 times [2024-06-21 19:16:36,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739680080] [2024-06-21 19:16:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:38,117 INFO 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 19:16:38,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:38,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739680080] [2024-06-21 19:16:38,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739680080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:38,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:38,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:38,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047733639] [2024-06-21 19:16:38,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:38,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:38,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:38,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:38,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:38,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 305 transitions, 3494 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 19:16:38,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:38,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:38,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:38,696 INFO L124 PetriNetUnfolderBase]: 719/1296 cut-off events. [2024-06-21 19:16:38,696 INFO L125 PetriNetUnfolderBase]: For 161093/161093 co-relation queries the response was YES. [2024-06-21 19:16:38,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10095 conditions, 1296 events. 719/1296 cut-off events. For 161093/161093 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6906 event pairs, 173 based on Foata normal form. 2/1296 useless extension candidates. Maximal degree in co-relation 9956. Up to 1161 conditions per place. [2024-06-21 19:16:38,709 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 264 selfloop transitions, 52 changer transitions 0/318 dead transitions. [2024-06-21 19:16:38,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 318 transitions, 4181 flow [2024-06-21 19:16:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 19:16:38,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 19:16:38,710 INFO L175 Difference]: Start difference. First operand has 320 places, 305 transitions, 3494 flow. Second operand 10 states and 121 transitions. [2024-06-21 19:16:38,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 318 transitions, 4181 flow [2024-06-21 19:16:39,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 318 transitions, 4075 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:39,231 INFO L231 Difference]: Finished difference. Result has 322 places, 306 transitions, 3518 flow [2024-06-21 19:16:39,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3518, PETRI_PLACES=322, PETRI_TRANSITIONS=306} [2024-06-21 19:16:39,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-21 19:16:39,231 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 306 transitions, 3518 flow [2024-06-21 19:16:39,231 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 19:16:39,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:39,231 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 19:16:39,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 19:16:39,232 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 19:16:39,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash 578467300, now seen corresponding path program 5 times [2024-06-21 19:16:39,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:39,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456518122] [2024-06-21 19:16:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:39,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:40,844 INFO 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 19:16:40,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:40,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456518122] [2024-06-21 19:16:40,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456518122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:40,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:40,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:40,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473176928] [2024-06-21 19:16:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:40,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:40,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:40,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:40,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:40,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:40,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 306 transitions, 3518 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 19:16:40,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:40,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:40,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:41,438 INFO L124 PetriNetUnfolderBase]: 725/1306 cut-off events. [2024-06-21 19:16:41,438 INFO L125 PetriNetUnfolderBase]: For 164714/164714 co-relation queries the response was YES. [2024-06-21 19:16:41,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10206 conditions, 1306 events. 725/1306 cut-off events. For 164714/164714 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 6961 event pairs, 174 based on Foata normal form. 2/1306 useless extension candidates. Maximal degree in co-relation 10066. Up to 1156 conditions per place. [2024-06-21 19:16:41,451 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 263 selfloop transitions, 60 changer transitions 0/325 dead transitions. [2024-06-21 19:16:41,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 325 transitions, 4291 flow [2024-06-21 19:16:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:41,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 19:16:41,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 19:16:41,452 INFO L175 Difference]: Start difference. First operand has 322 places, 306 transitions, 3518 flow. Second operand 11 states and 134 transitions. [2024-06-21 19:16:41,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 325 transitions, 4291 flow [2024-06-21 19:16:41,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 325 transitions, 4173 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:41,962 INFO L231 Difference]: Finished difference. Result has 327 places, 313 transitions, 3643 flow [2024-06-21 19:16:41,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3643, PETRI_PLACES=327, PETRI_TRANSITIONS=313} [2024-06-21 19:16:41,962 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2024-06-21 19:16:41,962 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 313 transitions, 3643 flow [2024-06-21 19:16:41,962 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 19:16:41,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:41,962 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 19:16:41,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 19:16:41,963 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 19:16:41,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash -295278216, now seen corresponding path program 9 times [2024-06-21 19:16:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:41,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638462897] [2024-06-21 19:16:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:43,566 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 19:16:43,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:43,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638462897] [2024-06-21 19:16:43,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638462897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:43,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:43,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:43,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940603183] [2024-06-21 19:16:43,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:43,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:43,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:43,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:43,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:43,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:43,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 313 transitions, 3643 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 19:16:43,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:43,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:43,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:44,203 INFO L124 PetriNetUnfolderBase]: 729/1314 cut-off events. [2024-06-21 19:16:44,203 INFO L125 PetriNetUnfolderBase]: For 171688/171688 co-relation queries the response was YES. [2024-06-21 19:16:44,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10387 conditions, 1314 events. 729/1314 cut-off events. For 171688/171688 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7029 event pairs, 172 based on Foata normal form. 2/1314 useless extension candidates. Maximal degree in co-relation 10244. Up to 1174 conditions per place. [2024-06-21 19:16:44,215 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 274 selfloop transitions, 50 changer transitions 0/326 dead transitions. [2024-06-21 19:16:44,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 326 transitions, 4341 flow [2024-06-21 19:16:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:16:44,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:16:44,216 INFO L175 Difference]: Start difference. First operand has 327 places, 313 transitions, 3643 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:16:44,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 326 transitions, 4341 flow [2024-06-21 19:16:44,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 326 transitions, 4212 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:44,765 INFO L231 Difference]: Finished difference. Result has 332 places, 314 transitions, 3642 flow [2024-06-21 19:16:44,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3642, PETRI_PLACES=332, PETRI_TRANSITIONS=314} [2024-06-21 19:16:44,766 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 302 predicate places. [2024-06-21 19:16:44,766 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 314 transitions, 3642 flow [2024-06-21 19:16:44,766 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 19:16:44,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:44,766 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 19:16:44,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 19:16:44,766 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 19:16:44,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:44,766 INFO L85 PathProgramCache]: Analyzing trace with hash -295393536, now seen corresponding path program 10 times [2024-06-21 19:16:44,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:44,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003849235] [2024-06-21 19:16:44,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:44,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:46,321 INFO 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 19:16:46,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:46,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003849235] [2024-06-21 19:16:46,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003849235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:46,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:46,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:46,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097381122] [2024-06-21 19:16:46,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:46,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:46,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:46,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:46,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 314 transitions, 3642 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 19:16:46,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:46,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:46,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:46,898 INFO L124 PetriNetUnfolderBase]: 733/1322 cut-off events. [2024-06-21 19:16:46,898 INFO L125 PetriNetUnfolderBase]: For 175099/175099 co-relation queries the response was YES. [2024-06-21 19:16:46,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10475 conditions, 1322 events. 733/1322 cut-off events. For 175099/175099 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7079 event pairs, 170 based on Foata normal form. 2/1322 useless extension candidates. Maximal degree in co-relation 10330. Up to 1134 conditions per place. [2024-06-21 19:16:46,913 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 272 selfloop transitions, 54 changer transitions 0/328 dead transitions. [2024-06-21 19:16:46,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 328 transitions, 4348 flow [2024-06-21 19:16:46,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:16:46,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:16:46,914 INFO L175 Difference]: Start difference. First operand has 332 places, 314 transitions, 3642 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:16:46,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 328 transitions, 4348 flow [2024-06-21 19:16:47,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 328 transitions, 4228 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:47,501 INFO L231 Difference]: Finished difference. Result has 334 places, 315 transitions, 3660 flow [2024-06-21 19:16:47,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3660, PETRI_PLACES=334, PETRI_TRANSITIONS=315} [2024-06-21 19:16:47,501 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2024-06-21 19:16:47,502 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 315 transitions, 3660 flow [2024-06-21 19:16:47,502 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 19:16:47,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:47,502 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 19:16:47,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 19:16:47,502 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 19:16:47,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash -295988182, now seen corresponding path program 11 times [2024-06-21 19:16:47,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:47,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120369664] [2024-06-21 19:16:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:47,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:49,055 INFO 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 19:16:49,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:49,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120369664] [2024-06-21 19:16:49,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120369664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:49,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:49,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:49,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463041096] [2024-06-21 19:16:49,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:49,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:49,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:49,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 315 transitions, 3660 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 19:16:49,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:49,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:49,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:49,663 INFO L124 PetriNetUnfolderBase]: 737/1330 cut-off events. [2024-06-21 19:16:49,663 INFO L125 PetriNetUnfolderBase]: For 178844/178844 co-relation queries the response was YES. [2024-06-21 19:16:49,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10566 conditions, 1330 events. 737/1330 cut-off events. For 178844/178844 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7153 event pairs, 170 based on Foata normal form. 2/1330 useless extension candidates. Maximal degree in co-relation 10420. Up to 1079 conditions per place. [2024-06-21 19:16:49,678 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 257 selfloop transitions, 74 changer transitions 0/333 dead transitions. [2024-06-21 19:16:49,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 333 transitions, 4590 flow [2024-06-21 19:16:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:49,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 19:16:49,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 19:16:49,680 INFO L175 Difference]: Start difference. First operand has 334 places, 315 transitions, 3660 flow. Second operand 11 states and 133 transitions. [2024-06-21 19:16:49,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 333 transitions, 4590 flow [2024-06-21 19:16:50,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 333 transitions, 4464 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:50,304 INFO L231 Difference]: Finished difference. Result has 336 places, 316 transitions, 3712 flow [2024-06-21 19:16:50,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3712, PETRI_PLACES=336, PETRI_TRANSITIONS=316} [2024-06-21 19:16:50,305 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2024-06-21 19:16:50,305 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 316 transitions, 3712 flow [2024-06-21 19:16:50,305 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 19:16:50,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:50,305 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 19:16:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 19:16:50,305 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 19:16:50,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash -295868212, now seen corresponding path program 12 times [2024-06-21 19:16:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:50,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291853498] [2024-06-21 19:16:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:51,905 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 19:16:51,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:51,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291853498] [2024-06-21 19:16:51,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291853498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:51,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:51,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:51,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761427608] [2024-06-21 19:16:51,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:51,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:51,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:51,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:51,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:52,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:52,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 316 transitions, 3712 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 19:16:52,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:52,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:52,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:52,588 INFO L124 PetriNetUnfolderBase]: 741/1338 cut-off events. [2024-06-21 19:16:52,589 INFO L125 PetriNetUnfolderBase]: For 182424/182424 co-relation queries the response was YES. [2024-06-21 19:16:52,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10677 conditions, 1338 events. 741/1338 cut-off events. For 182424/182424 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 7211 event pairs, 180 based on Foata normal form. 2/1338 useless extension candidates. Maximal degree in co-relation 10530. Up to 1180 conditions per place. [2024-06-21 19:16:52,605 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 256 selfloop transitions, 72 changer transitions 0/330 dead transitions. [2024-06-21 19:16:52,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 330 transitions, 4430 flow [2024-06-21 19:16:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 19:16:52,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 19:16:52,607 INFO L175 Difference]: Start difference. First operand has 336 places, 316 transitions, 3712 flow. Second operand 11 states and 128 transitions. [2024-06-21 19:16:52,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 330 transitions, 4430 flow [2024-06-21 19:16:53,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 330 transitions, 4232 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:53,219 INFO L231 Difference]: Finished difference. Result has 338 places, 317 transitions, 3692 flow [2024-06-21 19:16:53,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3692, PETRI_PLACES=338, PETRI_TRANSITIONS=317} [2024-06-21 19:16:53,219 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2024-06-21 19:16:53,219 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 317 transitions, 3692 flow [2024-06-21 19:16:53,219 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 19:16:53,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:53,220 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 19:16:53,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 19:16:53,220 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 19:16:53,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:53,220 INFO L85 PathProgramCache]: Analyzing trace with hash -295868026, now seen corresponding path program 6 times [2024-06-21 19:16:53,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:53,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212303091] [2024-06-21 19:16:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:53,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:54,822 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 19:16:54,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:54,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212303091] [2024-06-21 19:16:54,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212303091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:54,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:54,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:54,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023846444] [2024-06-21 19:16:54,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:54,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:54,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:54,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:54,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:54,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 317 transitions, 3692 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 19:16:54,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:54,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:54,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:55,463 INFO L124 PetriNetUnfolderBase]: 757/1364 cut-off events. [2024-06-21 19:16:55,463 INFO L125 PetriNetUnfolderBase]: For 196550/196550 co-relation queries the response was YES. [2024-06-21 19:16:55,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11051 conditions, 1364 events. 757/1364 cut-off events. For 196550/196550 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 7382 event pairs, 170 based on Foata normal form. 2/1364 useless extension candidates. Maximal degree in co-relation 10903. Up to 1160 conditions per place. [2024-06-21 19:16:55,480 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 259 selfloop transitions, 80 changer transitions 0/341 dead transitions. [2024-06-21 19:16:55,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 341 transitions, 4781 flow [2024-06-21 19:16:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 19:16:55,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 19:16:55,481 INFO L175 Difference]: Start difference. First operand has 338 places, 317 transitions, 3692 flow. Second operand 11 states and 141 transitions. [2024-06-21 19:16:55,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 341 transitions, 4781 flow [2024-06-21 19:16:56,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 341 transitions, 4621 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:56,055 INFO L231 Difference]: Finished difference. Result has 343 places, 327 transitions, 3944 flow [2024-06-21 19:16:56,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3944, PETRI_PLACES=343, PETRI_TRANSITIONS=327} [2024-06-21 19:16:56,055 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 313 predicate places. [2024-06-21 19:16:56,055 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 327 transitions, 3944 flow [2024-06-21 19:16:56,055 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 19:16:56,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:56,056 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 19:16:56,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 19:16:56,056 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 19:16:56,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash -295872862, now seen corresponding path program 13 times [2024-06-21 19:16:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:56,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62202666] [2024-06-21 19:16:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:57,665 INFO 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 19:16:57,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:57,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62202666] [2024-06-21 19:16:57,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62202666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:57,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:57,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:57,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988090419] [2024-06-21 19:16:57,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:57,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:57,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:57,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:57,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 327 transitions, 3944 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 19:16:57,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:57,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:57,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:58,361 INFO L124 PetriNetUnfolderBase]: 761/1372 cut-off events. [2024-06-21 19:16:58,362 INFO L125 PetriNetUnfolderBase]: For 204650/204650 co-relation queries the response was YES. [2024-06-21 19:16:58,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11321 conditions, 1372 events. 761/1372 cut-off events. For 204650/204650 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 7435 event pairs, 169 based on Foata normal form. 2/1372 useless extension candidates. Maximal degree in co-relation 11169. Up to 1200 conditions per place. [2024-06-21 19:16:58,377 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 267 selfloop transitions, 73 changer transitions 0/342 dead transitions. [2024-06-21 19:16:58,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 342 transitions, 4684 flow [2024-06-21 19:16:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 19:16:58,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 19:16:58,378 INFO L175 Difference]: Start difference. First operand has 343 places, 327 transitions, 3944 flow. Second operand 11 states and 130 transitions. [2024-06-21 19:16:58,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 342 transitions, 4684 flow [2024-06-21 19:16:59,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 342 transitions, 4591 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 19:16:59,029 INFO L231 Difference]: Finished difference. Result has 350 places, 328 transitions, 4027 flow [2024-06-21 19:16:59,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4027, PETRI_PLACES=350, PETRI_TRANSITIONS=328} [2024-06-21 19:16:59,030 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2024-06-21 19:16:59,030 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 328 transitions, 4027 flow [2024-06-21 19:16:59,030 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 19:16:59,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:59,030 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 19:16:59,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 19:16:59,030 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 19:16:59,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:59,031 INFO L85 PathProgramCache]: Analyzing trace with hash -118736506, now seen corresponding path program 7 times [2024-06-21 19:16:59,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:59,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217644574] [2024-06-21 19:16:59,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:59,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:00,665 INFO 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 19:17:00,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217644574] [2024-06-21 19:17:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217644574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:00,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:00,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610975521] [2024-06-21 19:17:00,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:00,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:17:00,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:00,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 328 transitions, 4027 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 19:17:00,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:00,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:00,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:01,307 INFO L124 PetriNetUnfolderBase]: 767/1382 cut-off events. [2024-06-21 19:17:01,307 INFO L125 PetriNetUnfolderBase]: For 208928/208928 co-relation queries the response was YES. [2024-06-21 19:17:01,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11532 conditions, 1382 events. 767/1382 cut-off events. For 208928/208928 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 7529 event pairs, 173 based on Foata normal form. 2/1382 useless extension candidates. Maximal degree in co-relation 11378. Up to 1253 conditions per place. [2024-06-21 19:17:01,327 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 286 selfloop transitions, 54 changer transitions 0/342 dead transitions. [2024-06-21 19:17:01,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 342 transitions, 4815 flow [2024-06-21 19:17:01,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:01,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:17:01,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:17:01,328 INFO L175 Difference]: Start difference. First operand has 350 places, 328 transitions, 4027 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:17:01,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 342 transitions, 4815 flow [2024-06-21 19:17:01,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 342 transitions, 4649 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 19:17:01,966 INFO L231 Difference]: Finished difference. Result has 352 places, 331 transitions, 4060 flow [2024-06-21 19:17:01,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4060, PETRI_PLACES=352, PETRI_TRANSITIONS=331} [2024-06-21 19:17:01,967 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 322 predicate places. [2024-06-21 19:17:01,967 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 331 transitions, 4060 flow [2024-06-21 19:17:01,967 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 19:17:01,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:01,967 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 19:17:01,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 19:17:01,967 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 19:17:01,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:01,967 INFO L85 PathProgramCache]: Analyzing trace with hash -118736692, now seen corresponding path program 14 times [2024-06-21 19:17:01,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:01,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715207964] [2024-06-21 19:17:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:01,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:03,354 INFO 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 19:17:03,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:03,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715207964] [2024-06-21 19:17:03,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715207964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:03,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:03,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:03,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717743438] [2024-06-21 19:17:03,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:03,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:03,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:03,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:03,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:03,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 331 transitions, 4060 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 19:17:03,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:03,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:03,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:03,948 INFO L124 PetriNetUnfolderBase]: 771/1390 cut-off events. [2024-06-21 19:17:03,948 INFO L125 PetriNetUnfolderBase]: For 213093/213093 co-relation queries the response was YES. [2024-06-21 19:17:03,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11571 conditions, 1390 events. 771/1390 cut-off events. For 213093/213093 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 7559 event pairs, 175 based on Foata normal form. 2/1390 useless extension candidates. Maximal degree in co-relation 11416. Up to 1279 conditions per place. [2024-06-21 19:17:03,965 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 297 selfloop transitions, 44 changer transitions 0/343 dead transitions. [2024-06-21 19:17:03,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 343 transitions, 4794 flow [2024-06-21 19:17:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 19:17:03,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 19:17:03,966 INFO L175 Difference]: Start difference. First operand has 352 places, 331 transitions, 4060 flow. Second operand 10 states and 116 transitions. [2024-06-21 19:17:03,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 343 transitions, 4794 flow [2024-06-21 19:17:04,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 343 transitions, 4646 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 19:17:04,602 INFO L231 Difference]: Finished difference. Result has 355 places, 332 transitions, 4032 flow [2024-06-21 19:17:04,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4032, PETRI_PLACES=355, PETRI_TRANSITIONS=332} [2024-06-21 19:17:04,603 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 325 predicate places. [2024-06-21 19:17:04,603 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 332 transitions, 4032 flow [2024-06-21 19:17:04,603 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 19:17:04,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:04,603 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 19:17:04,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 19:17:04,603 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 19:17:04,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash -291404212, now seen corresponding path program 15 times [2024-06-21 19:17:04,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:04,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407402685] [2024-06-21 19:17:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:06,059 INFO 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 19:17:06,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:06,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407402685] [2024-06-21 19:17:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407402685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:06,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:06,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:06,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229294998] [2024-06-21 19:17:06,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:06,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:06,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:06,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 332 transitions, 4032 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 19:17:06,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:06,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:06,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:06,772 INFO L124 PetriNetUnfolderBase]: 782/1411 cut-off events. [2024-06-21 19:17:06,772 INFO L125 PetriNetUnfolderBase]: For 228599/228599 co-relation queries the response was YES. [2024-06-21 19:17:06,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11931 conditions, 1411 events. 782/1411 cut-off events. For 228599/228599 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 7740 event pairs, 178 based on Foata normal form. 2/1411 useless extension candidates. Maximal degree in co-relation 11775. Up to 1275 conditions per place. [2024-06-21 19:17:06,789 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 294 selfloop transitions, 52 changer transitions 0/348 dead transitions. [2024-06-21 19:17:06,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 348 transitions, 5026 flow [2024-06-21 19:17:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 19:17:06,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 19:17:06,790 INFO L175 Difference]: Start difference. First operand has 355 places, 332 transitions, 4032 flow. Second operand 10 states and 122 transitions. [2024-06-21 19:17:06,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 348 transitions, 5026 flow [2024-06-21 19:17:07,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 348 transitions, 4931 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 19:17:07,544 INFO L231 Difference]: Finished difference. Result has 358 places, 334 transitions, 4103 flow [2024-06-21 19:17:07,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4103, PETRI_PLACES=358, PETRI_TRANSITIONS=334} [2024-06-21 19:17:07,545 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 328 predicate places. [2024-06-21 19:17:07,545 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 334 transitions, 4103 flow [2024-06-21 19:17:07,545 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 19:17:07,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:07,545 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 19:17:07,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 19:17:07,545 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 19:17:07,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:07,545 INFO L85 PathProgramCache]: Analyzing trace with hash -291226396, now seen corresponding path program 8 times [2024-06-21 19:17:07,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:07,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95834058] [2024-06-21 19:17:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:07,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:09,166 INFO 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 19:17:09,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95834058] [2024-06-21 19:17:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95834058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:09,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:09,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302827424] [2024-06-21 19:17:09,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:09,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:09,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:09,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:09,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:17:09,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:09,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 334 transitions, 4103 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 19:17:09,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:09,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:09,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:09,804 INFO L124 PetriNetUnfolderBase]: 788/1421 cut-off events. [2024-06-21 19:17:09,804 INFO L125 PetriNetUnfolderBase]: For 233205/233205 co-relation queries the response was YES. [2024-06-21 19:17:09,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12071 conditions, 1421 events. 788/1421 cut-off events. For 233205/233205 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 7803 event pairs, 180 based on Foata normal form. 2/1421 useless extension candidates. Maximal degree in co-relation 11914. Up to 1292 conditions per place. [2024-06-21 19:17:09,820 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 287 selfloop transitions, 60 changer transitions 0/349 dead transitions. [2024-06-21 19:17:09,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 349 transitions, 4915 flow [2024-06-21 19:17:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 19:17:09,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 19:17:09,821 INFO L175 Difference]: Start difference. First operand has 358 places, 334 transitions, 4103 flow. Second operand 11 states and 131 transitions. [2024-06-21 19:17:09,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 349 transitions, 4915 flow [2024-06-21 19:17:10,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 349 transitions, 4822 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:17:10,547 INFO L231 Difference]: Finished difference. Result has 363 places, 337 transitions, 4227 flow [2024-06-21 19:17:10,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4227, PETRI_PLACES=363, PETRI_TRANSITIONS=337} [2024-06-21 19:17:10,547 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 333 predicate places. [2024-06-21 19:17:10,547 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 337 transitions, 4227 flow [2024-06-21 19:17:10,547 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 19:17:10,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:10,547 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 19:17:10,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 19:17:10,547 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 19:17:10,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash -291226582, now seen corresponding path program 16 times [2024-06-21 19:17:10,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:10,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002769018] [2024-06-21 19:17:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:10,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:11,972 INFO 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 19:17:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002769018] [2024-06-21 19:17:11,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002769018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:11,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:11,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:11,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307794193] [2024-06-21 19:17:11,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:11,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:11,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:11,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:11,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:12,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:12,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 337 transitions, 4227 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 19:17:12,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:12,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:12,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:12,605 INFO L124 PetriNetUnfolderBase]: 792/1429 cut-off events. [2024-06-21 19:17:12,605 INFO L125 PetriNetUnfolderBase]: For 237808/237808 co-relation queries the response was YES. [2024-06-21 19:17:12,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12239 conditions, 1429 events. 792/1429 cut-off events. For 237808/237808 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 7879 event pairs, 176 based on Foata normal form. 2/1429 useless extension candidates. Maximal degree in co-relation 12080. Up to 1318 conditions per place. [2024-06-21 19:17:12,621 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 300 selfloop transitions, 48 changer transitions 0/350 dead transitions. [2024-06-21 19:17:12,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 350 transitions, 4983 flow [2024-06-21 19:17:12,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 19:17:12,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 19:17:12,622 INFO L175 Difference]: Start difference. First operand has 363 places, 337 transitions, 4227 flow. Second operand 10 states and 118 transitions. [2024-06-21 19:17:12,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 350 transitions, 4983 flow [2024-06-21 19:17:13,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 350 transitions, 4792 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-21 19:17:13,244 INFO L231 Difference]: Finished difference. Result has 364 places, 338 transitions, 4168 flow [2024-06-21 19:17:13,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4036, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4168, PETRI_PLACES=364, PETRI_TRANSITIONS=338} [2024-06-21 19:17:13,244 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 334 predicate places. [2024-06-21 19:17:13,244 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 338 transitions, 4168 flow [2024-06-21 19:17:13,244 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 19:17:13,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:13,244 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 19:17:13,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 19:17:13,245 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 19:17:13,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:13,245 INFO L85 PathProgramCache]: Analyzing trace with hash -757138706, now seen corresponding path program 17 times [2024-06-21 19:17:13,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:13,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009466945] [2024-06-21 19:17:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:13,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:14,735 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 19:17:14,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:14,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009466945] [2024-06-21 19:17:14,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009466945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:14,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:14,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:14,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050535144] [2024-06-21 19:17:14,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:14,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:14,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:14,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:14,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:14,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:14,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 338 transitions, 4168 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 19:17:14,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:14,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:14,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:15,395 INFO L124 PetriNetUnfolderBase]: 789/1424 cut-off events. [2024-06-21 19:17:15,395 INFO L125 PetriNetUnfolderBase]: For 229876/229876 co-relation queries the response was YES. [2024-06-21 19:17:15,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11940 conditions, 1424 events. 789/1424 cut-off events. For 229876/229876 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 7850 event pairs, 177 based on Foata normal form. 2/1424 useless extension candidates. Maximal degree in co-relation 11780. Up to 1307 conditions per place. [2024-06-21 19:17:15,412 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 297 selfloop transitions, 51 changer transitions 0/350 dead transitions. [2024-06-21 19:17:15,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 350 transitions, 4894 flow [2024-06-21 19:17:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:17:15,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:17:15,413 INFO L175 Difference]: Start difference. First operand has 364 places, 338 transitions, 4168 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:17:15,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 350 transitions, 4894 flow [2024-06-21 19:17:16,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 350 transitions, 4749 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 19:17:16,059 INFO L231 Difference]: Finished difference. Result has 366 places, 338 transitions, 4129 flow [2024-06-21 19:17:16,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4023, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4129, PETRI_PLACES=366, PETRI_TRANSITIONS=338} [2024-06-21 19:17:16,059 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2024-06-21 19:17:16,060 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 338 transitions, 4129 flow [2024-06-21 19:17:16,060 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 19:17:16,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:16,060 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 19:17:16,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 19:17:16,060 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 19:17:16,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash -291399376, now seen corresponding path program 9 times [2024-06-21 19:17:16,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:16,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288623242] [2024-06-21 19:17:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:16,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:17,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:17,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288623242] [2024-06-21 19:17:17,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288623242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:17,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:17,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:17,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580377547] [2024-06-21 19:17:17,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:17,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:17,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:17,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:17,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:17,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:17,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 338 transitions, 4129 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 19:17:17,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:17,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:17,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:18,275 INFO L124 PetriNetUnfolderBase]: 795/1434 cut-off events. [2024-06-21 19:17:18,275 INFO L125 PetriNetUnfolderBase]: For 233638/233638 co-relation queries the response was YES. [2024-06-21 19:17:18,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12001 conditions, 1434 events. 795/1434 cut-off events. For 233638/233638 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 7909 event pairs, 175 based on Foata normal form. 2/1434 useless extension candidates. Maximal degree in co-relation 11840. Up to 1293 conditions per place. [2024-06-21 19:17:18,290 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 287 selfloop transitions, 65 changer transitions 0/354 dead transitions. [2024-06-21 19:17:18,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 354 transitions, 4962 flow [2024-06-21 19:17:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 19:17:18,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 19:17:18,291 INFO L175 Difference]: Start difference. First operand has 366 places, 338 transitions, 4129 flow. Second operand 10 states and 129 transitions. [2024-06-21 19:17:18,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 354 transitions, 4962 flow [2024-06-21 19:17:18,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 354 transitions, 4854 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:18,917 INFO L231 Difference]: Finished difference. Result has 366 places, 341 transitions, 4254 flow [2024-06-21 19:17:18,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4254, PETRI_PLACES=366, PETRI_TRANSITIONS=341} [2024-06-21 19:17:18,917 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2024-06-21 19:17:18,917 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 341 transitions, 4254 flow [2024-06-21 19:17:18,918 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 19:17:18,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:18,918 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 19:17:18,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 19:17:18,918 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 19:17:18,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:18,918 INFO L85 PathProgramCache]: Analyzing trace with hash -118490428, now seen corresponding path program 1 times [2024-06-21 19:17:18,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:18,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943072788] [2024-06-21 19:17:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:20,750 INFO 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 19:17:20,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:20,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943072788] [2024-06-21 19:17:20,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943072788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:20,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:20,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:20,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528990615] [2024-06-21 19:17:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:20,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:20,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:20,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 341 transitions, 4254 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 19:17:20,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:20,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:20,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:21,316 INFO L124 PetriNetUnfolderBase]: 803/1450 cut-off events. [2024-06-21 19:17:21,316 INFO L125 PetriNetUnfolderBase]: For 250651/250651 co-relation queries the response was YES. [2024-06-21 19:17:21,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12177 conditions, 1450 events. 803/1450 cut-off events. For 250651/250651 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8028 event pairs, 174 based on Foata normal form. 4/1452 useless extension candidates. Maximal degree in co-relation 12015. Up to 1237 conditions per place. [2024-06-21 19:17:21,337 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 293 selfloop transitions, 60 changer transitions 0/355 dead transitions. [2024-06-21 19:17:21,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 355 transitions, 5031 flow [2024-06-21 19:17:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 19:17:21,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 19:17:21,338 INFO L175 Difference]: Start difference. First operand has 366 places, 341 transitions, 4254 flow. Second operand 11 states and 128 transitions. [2024-06-21 19:17:21,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 355 transitions, 5031 flow [2024-06-21 19:17:22,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 355 transitions, 4833 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-21 19:17:22,066 INFO L231 Difference]: Finished difference. Result has 369 places, 343 transitions, 4223 flow [2024-06-21 19:17:22,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4056, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4223, PETRI_PLACES=369, PETRI_TRANSITIONS=343} [2024-06-21 19:17:22,067 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 339 predicate places. [2024-06-21 19:17:22,067 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 343 transitions, 4223 flow [2024-06-21 19:17:22,067 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 19:17:22,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:22,067 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 19:17:22,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 19:17:22,068 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 19:17:22,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash -590731760, now seen corresponding path program 10 times [2024-06-21 19:17:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:22,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158776245] [2024-06-21 19:17:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:22,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:23,703 INFO 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 19:17:23,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:23,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158776245] [2024-06-21 19:17:23,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158776245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:23,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:23,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:23,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438503652] [2024-06-21 19:17:23,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:23,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:23,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:23,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 343 transitions, 4223 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 19:17:23,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:23,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:23,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:24,335 INFO L124 PetriNetUnfolderBase]: 809/1460 cut-off events. [2024-06-21 19:17:24,335 INFO L125 PetriNetUnfolderBase]: For 242729/242729 co-relation queries the response was YES. [2024-06-21 19:17:24,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12281 conditions, 1460 events. 809/1460 cut-off events. For 242729/242729 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 8114 event pairs, 179 based on Foata normal form. 2/1460 useless extension candidates. Maximal degree in co-relation 12118. Up to 1331 conditions per place. [2024-06-21 19:17:24,352 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 302 selfloop transitions, 53 changer transitions 0/357 dead transitions. [2024-06-21 19:17:24,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 357 transitions, 5059 flow [2024-06-21 19:17:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 19:17:24,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 19:17:24,353 INFO L175 Difference]: Start difference. First operand has 369 places, 343 transitions, 4223 flow. Second operand 10 states and 122 transitions. [2024-06-21 19:17:24,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 357 transitions, 5059 flow [2024-06-21 19:17:25,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 357 transitions, 4913 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 19:17:25,073 INFO L231 Difference]: Finished difference. Result has 371 places, 346 transitions, 4292 flow [2024-06-21 19:17:25,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4292, PETRI_PLACES=371, PETRI_TRANSITIONS=346} [2024-06-21 19:17:25,074 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 341 predicate places. [2024-06-21 19:17:25,074 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 346 transitions, 4292 flow [2024-06-21 19:17:25,074 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 19:17:25,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:25,074 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 19:17:25,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 19:17:25,074 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 19:17:25,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:25,074 INFO L85 PathProgramCache]: Analyzing trace with hash -590731946, now seen corresponding path program 18 times [2024-06-21 19:17:25,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:25,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652099756] [2024-06-21 19:17:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:25,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:26,703 INFO 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 19:17:26,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:26,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652099756] [2024-06-21 19:17:26,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652099756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:26,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:26,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:26,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681159244] [2024-06-21 19:17:26,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:26,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:26,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:17:26,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:26,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 346 transitions, 4292 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 19:17:26,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:26,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:26,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:27,465 INFO L124 PetriNetUnfolderBase]: 829/1504 cut-off events. [2024-06-21 19:17:27,465 INFO L125 PetriNetUnfolderBase]: For 310233/310233 co-relation queries the response was YES. [2024-06-21 19:17:27,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12479 conditions, 1504 events. 829/1504 cut-off events. For 310233/310233 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 8408 event pairs, 182 based on Foata normal form. 12/1514 useless extension candidates. Maximal degree in co-relation 12315. Up to 1244 conditions per place. [2024-06-21 19:17:27,483 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 295 selfloop transitions, 60 changer transitions 9/366 dead transitions. [2024-06-21 19:17:27,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 366 transitions, 5153 flow [2024-06-21 19:17:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 19:17:27,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 19:17:27,484 INFO L175 Difference]: Start difference. First operand has 371 places, 346 transitions, 4292 flow. Second operand 11 states and 138 transitions. [2024-06-21 19:17:27,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 366 transitions, 5153 flow [2024-06-21 19:17:28,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 366 transitions, 4942 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:28,176 INFO L231 Difference]: Finished difference. Result has 372 places, 343 transitions, 4196 flow [2024-06-21 19:17:28,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4196, PETRI_PLACES=372, PETRI_TRANSITIONS=343} [2024-06-21 19:17:28,177 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 342 predicate places. [2024-06-21 19:17:28,177 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 343 transitions, 4196 flow [2024-06-21 19:17:28,177 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 19:17:28,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:28,177 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 19:17:28,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 19:17:28,177 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 19:17:28,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash -125170432, now seen corresponding path program 19 times [2024-06-21 19:17:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:28,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786199495] [2024-06-21 19:17:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:29,592 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 19:17:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:29,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786199495] [2024-06-21 19:17:29,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786199495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:29,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:29,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:29,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420358150] [2024-06-21 19:17:29,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:29,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:29,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:29,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:29,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 343 transitions, 4196 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 19:17:29,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:29,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:29,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:30,207 INFO L124 PetriNetUnfolderBase]: 814/1475 cut-off events. [2024-06-21 19:17:30,208 INFO L125 PetriNetUnfolderBase]: For 264967/264967 co-relation queries the response was YES. [2024-06-21 19:17:30,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12638 conditions, 1475 events. 814/1475 cut-off events. For 264967/264967 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 8249 event pairs, 176 based on Foata normal form. 2/1475 useless extension candidates. Maximal degree in co-relation 12473. Up to 1326 conditions per place. [2024-06-21 19:17:30,222 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 305 selfloop transitions, 51 changer transitions 0/358 dead transitions. [2024-06-21 19:17:30,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 358 transitions, 5230 flow [2024-06-21 19:17:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 19:17:30,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:17:30,223 INFO L175 Difference]: Start difference. First operand has 372 places, 343 transitions, 4196 flow. Second operand 10 states and 120 transitions. [2024-06-21 19:17:30,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 358 transitions, 5230 flow [2024-06-21 19:17:30,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 358 transitions, 5083 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:30,914 INFO L231 Difference]: Finished difference. Result has 372 places, 345 transitions, 4221 flow [2024-06-21 19:17:30,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4221, PETRI_PLACES=372, PETRI_TRANSITIONS=345} [2024-06-21 19:17:30,914 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 342 predicate places. [2024-06-21 19:17:30,914 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 345 transitions, 4221 flow [2024-06-21 19:17:30,914 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 19:17:30,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:30,914 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 19:17:30,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 19:17:30,914 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 19:17:30,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -590904926, now seen corresponding path program 20 times [2024-06-21 19:17:30,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:30,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079156976] [2024-06-21 19:17:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:30,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:32,399 INFO 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 19:17:32,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:32,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079156976] [2024-06-21 19:17:32,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079156976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:32,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:32,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:32,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644111257] [2024-06-21 19:17:32,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:32,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:32,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:32,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:32,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:32,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:32,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 345 transitions, 4221 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 19:17:32,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:32,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:32,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:32,978 INFO L124 PetriNetUnfolderBase]: 811/1470 cut-off events. [2024-06-21 19:17:32,978 INFO L125 PetriNetUnfolderBase]: For 256071/256071 co-relation queries the response was YES. [2024-06-21 19:17:32,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12351 conditions, 1470 events. 811/1470 cut-off events. For 256071/256071 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 8226 event pairs, 173 based on Foata normal form. 2/1470 useless extension candidates. Maximal degree in co-relation 12185. Up to 1350 conditions per place. [2024-06-21 19:17:32,996 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 306 selfloop transitions, 48 changer transitions 0/356 dead transitions. [2024-06-21 19:17:32,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 356 transitions, 4955 flow [2024-06-21 19:17:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 19:17:32,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 19:17:32,997 INFO L175 Difference]: Start difference. First operand has 372 places, 345 transitions, 4221 flow. Second operand 11 states and 124 transitions. [2024-06-21 19:17:32,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 356 transitions, 4955 flow [2024-06-21 19:17:33,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 356 transitions, 4841 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 19:17:33,672 INFO L231 Difference]: Finished difference. Result has 377 places, 345 transitions, 4207 flow [2024-06-21 19:17:33,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4207, PETRI_PLACES=377, PETRI_TRANSITIONS=345} [2024-06-21 19:17:33,673 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 347 predicate places. [2024-06-21 19:17:33,673 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 345 transitions, 4207 flow [2024-06-21 19:17:33,673 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 19:17:33,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:33,673 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 19:17:33,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 19:17:33,673 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 19:17:33,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:33,674 INFO L85 PathProgramCache]: Analyzing trace with hash -590904740, now seen corresponding path program 11 times [2024-06-21 19:17:33,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:33,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020810633] [2024-06-21 19:17:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:33,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:35,292 INFO 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 19:17:35,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:35,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020810633] [2024-06-21 19:17:35,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020810633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:35,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:35,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:35,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859096435] [2024-06-21 19:17:35,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:35,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:35,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:35,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:35,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:35,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:35,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 345 transitions, 4207 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 19:17:35,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:35,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:35,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:35,932 INFO L124 PetriNetUnfolderBase]: 817/1480 cut-off events. [2024-06-21 19:17:35,932 INFO L125 PetriNetUnfolderBase]: For 260073/260073 co-relation queries the response was YES. [2024-06-21 19:17:35,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12480 conditions, 1480 events. 817/1480 cut-off events. For 260073/260073 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 8292 event pairs, 175 based on Foata normal form. 2/1480 useless extension candidates. Maximal degree in co-relation 12312. Up to 1339 conditions per place. [2024-06-21 19:17:35,949 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 300 selfloop transitions, 58 changer transitions 0/360 dead transitions. [2024-06-21 19:17:35,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 360 transitions, 5060 flow [2024-06-21 19:17:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 19:17:35,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 19:17:35,950 INFO L175 Difference]: Start difference. First operand has 377 places, 345 transitions, 4207 flow. Second operand 10 states and 123 transitions. [2024-06-21 19:17:35,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 360 transitions, 5060 flow [2024-06-21 19:17:36,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 360 transitions, 4954 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:36,716 INFO L231 Difference]: Finished difference. Result has 377 places, 348 transitions, 4332 flow [2024-06-21 19:17:36,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4332, PETRI_PLACES=377, PETRI_TRANSITIONS=348} [2024-06-21 19:17:36,717 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 347 predicate places. [2024-06-21 19:17:36,717 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 348 transitions, 4332 flow [2024-06-21 19:17:36,717 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 19:17:36,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:36,717 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 19:17:36,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 19:17:36,717 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 19:17:36,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1219851892, now seen corresponding path program 2 times [2024-06-21 19:17:36,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:36,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447636807] [2024-06-21 19:17:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:36,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:38,485 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 19:17:38,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:38,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447636807] [2024-06-21 19:17:38,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447636807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:38,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:38,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159947236] [2024-06-21 19:17:38,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:38,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:38,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:17:38,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:38,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 348 transitions, 4332 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 19:17:38,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:38,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:38,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:39,181 INFO L124 PetriNetUnfolderBase]: 821/1487 cut-off events. [2024-06-21 19:17:39,181 INFO L125 PetriNetUnfolderBase]: For 264946/264946 co-relation queries the response was YES. [2024-06-21 19:17:39,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12609 conditions, 1487 events. 821/1487 cut-off events. For 264946/264946 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 8366 event pairs, 171 based on Foata normal form. 2/1487 useless extension candidates. Maximal degree in co-relation 12440. Up to 1417 conditions per place. [2024-06-21 19:17:39,198 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 329 selfloop transitions, 30 changer transitions 0/361 dead transitions. [2024-06-21 19:17:39,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 361 transitions, 5114 flow [2024-06-21 19:17:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 19:17:39,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 19:17:39,199 INFO L175 Difference]: Start difference. First operand has 377 places, 348 transitions, 4332 flow. Second operand 11 states and 120 transitions. [2024-06-21 19:17:39,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 361 transitions, 5114 flow [2024-06-21 19:17:39,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 361 transitions, 4940 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 19:17:39,913 INFO L231 Difference]: Finished difference. Result has 381 places, 349 transitions, 4252 flow [2024-06-21 19:17:39,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4252, PETRI_PLACES=381, PETRI_TRANSITIONS=349} [2024-06-21 19:17:39,913 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 351 predicate places. [2024-06-21 19:17:39,914 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 349 transitions, 4252 flow [2024-06-21 19:17:39,914 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 19:17:39,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:39,914 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 19:17:39,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 19:17:39,914 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 19:17:39,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:39,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1628031274, now seen corresponding path program 3 times [2024-06-21 19:17:39,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:39,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393921482] [2024-06-21 19:17:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:39,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:41,531 INFO 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 19:17:41,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:41,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393921482] [2024-06-21 19:17:41,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393921482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:41,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:41,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:41,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122940828] [2024-06-21 19:17:41,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:41,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:41,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:41,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:41,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:17:41,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:41,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 349 transitions, 4252 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 19:17:41,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:41,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:41,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:42,154 INFO L124 PetriNetUnfolderBase]: 825/1495 cut-off events. [2024-06-21 19:17:42,154 INFO L125 PetriNetUnfolderBase]: For 268911/268911 co-relation queries the response was YES. [2024-06-21 19:17:42,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12602 conditions, 1495 events. 825/1495 cut-off events. For 268911/268911 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8396 event pairs, 177 based on Foata normal form. 2/1495 useless extension candidates. Maximal degree in co-relation 12432. Up to 1461 conditions per place. [2024-06-21 19:17:42,172 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 340 selfloop transitions, 18 changer transitions 0/360 dead transitions. [2024-06-21 19:17:42,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 360 transitions, 5020 flow [2024-06-21 19:17:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:42,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:42,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 19:17:42,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 19:17:42,173 INFO L175 Difference]: Start difference. First operand has 381 places, 349 transitions, 4252 flow. Second operand 10 states and 107 transitions. [2024-06-21 19:17:42,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 360 transitions, 5020 flow [2024-06-21 19:17:42,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 360 transitions, 4847 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-21 19:17:42,968 INFO L231 Difference]: Finished difference. Result has 380 places, 350 transitions, 4151 flow [2024-06-21 19:17:42,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4151, PETRI_PLACES=380, PETRI_TRANSITIONS=350} [2024-06-21 19:17:42,968 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 350 predicate places. [2024-06-21 19:17:42,969 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 350 transitions, 4151 flow [2024-06-21 19:17:42,969 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 19:17:42,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:42,969 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 19:17:42,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 19:17:42,969 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 19:17:42,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash -207544460, now seen corresponding path program 12 times [2024-06-21 19:17:42,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:42,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472889225] [2024-06-21 19:17:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:42,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:44,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:44,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472889225] [2024-06-21 19:17:44,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472889225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:44,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:44,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:44,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093142430] [2024-06-21 19:17:44,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:44,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:44,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:17:44,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:44,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 350 transitions, 4151 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 19:17:44,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:44,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:44,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:45,174 INFO L124 PetriNetUnfolderBase]: 819/1486 cut-off events. [2024-06-21 19:17:45,174 INFO L125 PetriNetUnfolderBase]: For 258565/258565 co-relation queries the response was YES. [2024-06-21 19:17:45,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12086 conditions, 1486 events. 819/1486 cut-off events. For 258565/258565 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 8356 event pairs, 172 based on Foata normal form. 3/1487 useless extension candidates. Maximal degree in co-relation 11915. Up to 1440 conditions per place. [2024-06-21 19:17:45,192 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 332 selfloop transitions, 27 changer transitions 0/361 dead transitions. [2024-06-21 19:17:45,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 361 transitions, 4929 flow [2024-06-21 19:17:45,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 19:17:45,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 19:17:45,193 INFO L175 Difference]: Start difference. First operand has 380 places, 350 transitions, 4151 flow. Second operand 11 states and 117 transitions. [2024-06-21 19:17:45,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 361 transitions, 4929 flow [2024-06-21 19:17:46,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 361 transitions, 4853 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 19:17:46,011 INFO L231 Difference]: Finished difference. Result has 385 places, 351 transitions, 4175 flow [2024-06-21 19:17:46,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4175, PETRI_PLACES=385, PETRI_TRANSITIONS=351} [2024-06-21 19:17:46,011 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 355 predicate places. [2024-06-21 19:17:46,011 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 351 transitions, 4175 flow [2024-06-21 19:17:46,011 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 19:17:46,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:46,011 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 19:17:46,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 19:17:46,011 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 19:17:46,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:46,012 INFO L85 PathProgramCache]: Analyzing trace with hash -254843674, now seen corresponding path program 21 times [2024-06-21 19:17:46,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:46,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601975047] [2024-06-21 19:17:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:46,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:47,636 INFO 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 19:17:47,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:47,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601975047] [2024-06-21 19:17:47,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601975047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:47,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:47,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:47,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047896497] [2024-06-21 19:17:47,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:47,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:47,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:17:47,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:47,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 351 transitions, 4175 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 19:17:47,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:47,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:47,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:48,441 INFO L124 PetriNetUnfolderBase]: 828/1502 cut-off events. [2024-06-21 19:17:48,441 INFO L125 PetriNetUnfolderBase]: For 263567/263567 co-relation queries the response was YES. [2024-06-21 19:17:48,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12408 conditions, 1502 events. 828/1502 cut-off events. For 263567/263567 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 8480 event pairs, 170 based on Foata normal form. 2/1502 useless extension candidates. Maximal degree in co-relation 12236. Up to 1359 conditions per place. [2024-06-21 19:17:48,459 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 314 selfloop transitions, 53 changer transitions 0/369 dead transitions. [2024-06-21 19:17:48,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 369 transitions, 5308 flow [2024-06-21 19:17:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 19:17:48,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 19:17:48,460 INFO L175 Difference]: Start difference. First operand has 385 places, 351 transitions, 4175 flow. Second operand 11 states and 125 transitions. [2024-06-21 19:17:48,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 369 transitions, 5308 flow [2024-06-21 19:17:49,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 369 transitions, 5071 flow, removed 37 selfloop flow, removed 12 redundant places. [2024-06-21 19:17:49,182 INFO L231 Difference]: Finished difference. Result has 385 places, 354 transitions, 4187 flow [2024-06-21 19:17:49,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4187, PETRI_PLACES=385, PETRI_TRANSITIONS=354} [2024-06-21 19:17:49,182 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 355 predicate places. [2024-06-21 19:17:49,183 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 354 transitions, 4187 flow [2024-06-21 19:17:49,183 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 19:17:49,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:49,183 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 19:17:49,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 19:17:49,183 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 19:17:49,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash -248168320, now seen corresponding path program 4 times [2024-06-21 19:17:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:49,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820227361] [2024-06-21 19:17:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:50,923 INFO 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 19:17:50,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:50,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820227361] [2024-06-21 19:17:50,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820227361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:50,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:50,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:17:50,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623888807] [2024-06-21 19:17:50,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:50,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:17:50,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:17:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:17:51,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:51,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 354 transitions, 4187 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 19:17:51,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:51,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:51,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:51,538 INFO L124 PetriNetUnfolderBase]: 832/1510 cut-off events. [2024-06-21 19:17:51,538 INFO L125 PetriNetUnfolderBase]: For 268744/268744 co-relation queries the response was YES. [2024-06-21 19:17:51,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12492 conditions, 1510 events. 832/1510 cut-off events. For 268744/268744 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 8536 event pairs, 169 based on Foata normal form. 2/1510 useless extension candidates. Maximal degree in co-relation 12318. Up to 1455 conditions per place. [2024-06-21 19:17:51,557 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 340 selfloop transitions, 25 changer transitions 0/367 dead transitions. [2024-06-21 19:17:51,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 367 transitions, 4985 flow [2024-06-21 19:17:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 19:17:51,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-21 19:17:51,557 INFO L175 Difference]: Start difference. First operand has 385 places, 354 transitions, 4187 flow. Second operand 11 states and 118 transitions. [2024-06-21 19:17:51,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 367 transitions, 4985 flow [2024-06-21 19:17:52,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 367 transitions, 4851 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 19:17:52,364 INFO L231 Difference]: Finished difference. Result has 387 places, 355 transitions, 4141 flow [2024-06-21 19:17:52,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4141, PETRI_PLACES=387, PETRI_TRANSITIONS=355} [2024-06-21 19:17:52,364 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2024-06-21 19:17:52,364 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 355 transitions, 4141 flow [2024-06-21 19:17:52,364 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 19:17:52,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:52,364 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 19:17:52,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 19:17:52,365 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 19:17:52,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:52,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2110252866, now seen corresponding path program 13 times [2024-06-21 19:17:52,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:52,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373916479] [2024-06-21 19:17:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:53,887 INFO 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 19:17:53,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:53,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373916479] [2024-06-21 19:17:53,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373916479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:53,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010306445] [2024-06-21 19:17:53,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:53,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:53,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:53,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:54,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:54,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 355 transitions, 4141 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 19:17:54,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:54,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:54,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:54,663 INFO L124 PetriNetUnfolderBase]: 844/1530 cut-off events. [2024-06-21 19:17:54,664 INFO L125 PetriNetUnfolderBase]: For 273223/273223 co-relation queries the response was YES. [2024-06-21 19:17:54,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12607 conditions, 1530 events. 844/1530 cut-off events. For 273223/273223 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 8672 event pairs, 170 based on Foata normal form. 2/1530 useless extension candidates. Maximal degree in co-relation 12432. Up to 1423 conditions per place. [2024-06-21 19:17:54,683 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 330 selfloop transitions, 41 changer transitions 0/373 dead transitions. [2024-06-21 19:17:54,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 373 transitions, 5042 flow [2024-06-21 19:17:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 19:17:54,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 19:17:54,684 INFO L175 Difference]: Start difference. First operand has 387 places, 355 transitions, 4141 flow. Second operand 10 states and 118 transitions. [2024-06-21 19:17:54,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 373 transitions, 5042 flow [2024-06-21 19:17:55,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 373 transitions, 4951 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:55,469 INFO L231 Difference]: Finished difference. Result has 387 places, 360 transitions, 4252 flow [2024-06-21 19:17:55,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4050, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4252, PETRI_PLACES=387, PETRI_TRANSITIONS=360} [2024-06-21 19:17:55,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2024-06-21 19:17:55,469 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 360 transitions, 4252 flow [2024-06-21 19:17:55,469 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 19:17:55,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:55,469 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 19:17:55,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 19:17:55,469 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 19:17:55,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:55,470 INFO L85 PathProgramCache]: Analyzing trace with hash -254663998, now seen corresponding path program 14 times [2024-06-21 19:17:55,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:55,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623838561] [2024-06-21 19:17:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:55,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:56,958 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 19:17:56,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:56,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623838561] [2024-06-21 19:17:56,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623838561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:56,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:56,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:56,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800374944] [2024-06-21 19:17:56,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:56,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:56,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:57,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:57,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 360 transitions, 4252 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 19:17:57,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:57,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:57,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:57,703 INFO L124 PetriNetUnfolderBase]: 850/1540 cut-off events. [2024-06-21 19:17:57,703 INFO L125 PetriNetUnfolderBase]: For 278232/278232 co-relation queries the response was YES. [2024-06-21 19:17:57,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12761 conditions, 1540 events. 850/1540 cut-off events. For 278232/278232 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 8732 event pairs, 170 based on Foata normal form. 2/1540 useless extension candidates. Maximal degree in co-relation 12585. Up to 1433 conditions per place. [2024-06-21 19:17:57,724 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 329 selfloop transitions, 44 changer transitions 0/375 dead transitions. [2024-06-21 19:17:57,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 375 transitions, 5129 flow [2024-06-21 19:17:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 19:17:57,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 19:17:57,725 INFO L175 Difference]: Start difference. First operand has 387 places, 360 transitions, 4252 flow. Second operand 11 states and 123 transitions. [2024-06-21 19:17:57,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 375 transitions, 5129 flow [2024-06-21 19:17:58,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 375 transitions, 5002 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 19:17:58,538 INFO L231 Difference]: Finished difference. Result has 392 places, 362 transitions, 4305 flow [2024-06-21 19:17:58,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4305, PETRI_PLACES=392, PETRI_TRANSITIONS=362} [2024-06-21 19:17:58,539 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 362 predicate places. [2024-06-21 19:17:58,539 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 362 transitions, 4305 flow [2024-06-21 19:17:58,539 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 19:17:58,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:58,539 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 19:17:58,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 19:17:58,539 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 19:17:58,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -254670694, now seen corresponding path program 22 times [2024-06-21 19:17:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804587675] [2024-06-21 19:17:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:59,997 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 19:17:59,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:59,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804587675] [2024-06-21 19:17:59,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804587675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:59,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:59,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:59,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729894654] [2024-06-21 19:17:59,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:59,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:59,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:59,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:59,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:00,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:00,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 362 transitions, 4305 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 19:18:00,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:00,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:00,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:00,688 INFO L124 PetriNetUnfolderBase]: 854/1548 cut-off events. [2024-06-21 19:18:00,688 INFO L125 PetriNetUnfolderBase]: For 282740/282740 co-relation queries the response was YES. [2024-06-21 19:18:00,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12825 conditions, 1548 events. 854/1548 cut-off events. For 282740/282740 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 8782 event pairs, 172 based on Foata normal form. 2/1548 useless extension candidates. Maximal degree in co-relation 12648. Up to 1499 conditions per place. [2024-06-21 19:18:00,706 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 345 selfloop transitions, 26 changer transitions 0/373 dead transitions. [2024-06-21 19:18:00,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 373 transitions, 5105 flow [2024-06-21 19:18:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 19:18:00,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 19:18:00,707 INFO L175 Difference]: Start difference. First operand has 392 places, 362 transitions, 4305 flow. Second operand 11 states and 116 transitions. [2024-06-21 19:18:00,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 373 transitions, 5105 flow [2024-06-21 19:18:01,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 373 transitions, 4955 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:01,470 INFO L231 Difference]: Finished difference. Result has 394 places, 363 transitions, 4249 flow [2024-06-21 19:18:01,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4155, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4249, PETRI_PLACES=394, PETRI_TRANSITIONS=363} [2024-06-21 19:18:01,470 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 364 predicate places. [2024-06-21 19:18:01,470 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 363 transitions, 4249 flow [2024-06-21 19:18:01,470 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 19:18:01,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:01,470 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 19:18:01,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 19:18:01,470 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 19:18:01,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash -886833180, now seen corresponding path program 15 times [2024-06-21 19:18:01,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:01,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684096253] [2024-06-21 19:18:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:01,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:02,846 INFO 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 19:18:02,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:02,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684096253] [2024-06-21 19:18:02,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684096253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:02,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:02,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:02,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032103712] [2024-06-21 19:18:02,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:02,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:02,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:02,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:02,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 363 transitions, 4249 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 19:18:02,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:02,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:02,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:03,595 INFO L124 PetriNetUnfolderBase]: 870/1574 cut-off events. [2024-06-21 19:18:03,595 INFO L125 PetriNetUnfolderBase]: For 303226/303226 co-relation queries the response was YES. [2024-06-21 19:18:03,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13350 conditions, 1574 events. 870/1574 cut-off events. For 303226/303226 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 8982 event pairs, 176 based on Foata normal form. 2/1574 useless extension candidates. Maximal degree in co-relation 13172. Up to 1476 conditions per place. [2024-06-21 19:18:03,610 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 339 selfloop transitions, 42 changer transitions 0/383 dead transitions. [2024-06-21 19:18:03,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 383 transitions, 5516 flow [2024-06-21 19:18:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 19:18:03,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 19:18:03,611 INFO L175 Difference]: Start difference. First operand has 394 places, 363 transitions, 4249 flow. Second operand 11 states and 123 transitions. [2024-06-21 19:18:03,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 383 transitions, 5516 flow [2024-06-21 19:18:04,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 383 transitions, 5434 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:04,570 INFO L231 Difference]: Finished difference. Result has 397 places, 368 transitions, 4483 flow [2024-06-21 19:18:04,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4167, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4483, PETRI_PLACES=397, PETRI_TRANSITIONS=368} [2024-06-21 19:18:04,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2024-06-21 19:18:04,570 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 368 transitions, 4483 flow [2024-06-21 19:18:04,570 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 19:18:04,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:04,570 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 19:18:04,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 19:18:04,570 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 19:18:04,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:04,571 INFO L85 PathProgramCache]: Analyzing trace with hash -254848324, now seen corresponding path program 23 times [2024-06-21 19:18:04,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:04,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962393236] [2024-06-21 19:18:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:04,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:06,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:06,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962393236] [2024-06-21 19:18:06,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962393236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:06,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:06,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:06,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946932693] [2024-06-21 19:18:06,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:06,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:06,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:06,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:06,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:06,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 368 transitions, 4483 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 19:18:06,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:06,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:06,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:06,781 INFO L124 PetriNetUnfolderBase]: 874/1582 cut-off events. [2024-06-21 19:18:06,781 INFO L125 PetriNetUnfolderBase]: For 308717/308717 co-relation queries the response was YES. [2024-06-21 19:18:06,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13498 conditions, 1582 events. 874/1582 cut-off events. For 308717/308717 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 9044 event pairs, 172 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 13318. Up to 1490 conditions per place. [2024-06-21 19:18:06,797 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 343 selfloop transitions, 36 changer transitions 0/381 dead transitions. [2024-06-21 19:18:06,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 381 transitions, 5557 flow [2024-06-21 19:18:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 19:18:06,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-21 19:18:06,798 INFO L175 Difference]: Start difference. First operand has 397 places, 368 transitions, 4483 flow. Second operand 11 states and 119 transitions. [2024-06-21 19:18:06,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 381 transitions, 5557 flow [2024-06-21 19:18:07,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 381 transitions, 5396 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 19:18:07,741 INFO L231 Difference]: Finished difference. Result has 400 places, 369 transitions, 4436 flow [2024-06-21 19:18:07,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4436, PETRI_PLACES=400, PETRI_TRANSITIONS=369} [2024-06-21 19:18:07,742 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 370 predicate places. [2024-06-21 19:18:07,742 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 369 transitions, 4436 flow [2024-06-21 19:18:07,742 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 19:18:07,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:07,742 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 19:18:07,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 19:18:07,742 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 19:18:07,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:07,742 INFO L85 PathProgramCache]: Analyzing trace with hash -886833366, now seen corresponding path program 24 times [2024-06-21 19:18:07,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:07,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292354830] [2024-06-21 19:18:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:07,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:09,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:09,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292354830] [2024-06-21 19:18:09,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292354830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:09,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:09,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:09,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653380570] [2024-06-21 19:18:09,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:09,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:09,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:09,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:09,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:09,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:09,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 369 transitions, 4436 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 19:18:09,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:09,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:09,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:10,067 INFO L124 PetriNetUnfolderBase]: 880/1600 cut-off events. [2024-06-21 19:18:10,067 INFO L125 PetriNetUnfolderBase]: For 382271/382271 co-relation queries the response was YES. [2024-06-21 19:18:10,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12406 conditions, 1600 events. 880/1600 cut-off events. For 382271/382271 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 9195 event pairs, 165 based on Foata normal form. 21/1619 useless extension candidates. Maximal degree in co-relation 12225. Up to 1466 conditions per place. [2024-06-21 19:18:10,089 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 350 selfloop transitions, 23 changer transitions 12/387 dead transitions. [2024-06-21 19:18:10,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 387 transitions, 5411 flow [2024-06-21 19:18:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 19:18:10,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 19:18:10,090 INFO L175 Difference]: Start difference. First operand has 400 places, 369 transitions, 4436 flow. Second operand 11 states and 125 transitions. [2024-06-21 19:18:10,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 387 transitions, 5411 flow [2024-06-21 19:18:10,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 387 transitions, 5217 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-21 19:18:10,904 INFO L231 Difference]: Finished difference. Result has 401 places, 365 transitions, 4262 flow [2024-06-21 19:18:10,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4248, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4262, PETRI_PLACES=401, PETRI_TRANSITIONS=365} [2024-06-21 19:18:10,904 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 371 predicate places. [2024-06-21 19:18:10,904 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 365 transitions, 4262 flow [2024-06-21 19:18:10,905 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 19:18:10,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:10,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:10,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 19:18:10,905 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 19:18:10,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:10,905 INFO L85 PathProgramCache]: Analyzing trace with hash -886826670, now seen corresponding path program 16 times [2024-06-21 19:18:10,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:10,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261690136] [2024-06-21 19:18:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:10,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:12,438 INFO 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 19:18:12,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:12,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261690136] [2024-06-21 19:18:12,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261690136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:12,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:12,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:12,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007043207] [2024-06-21 19:18:12,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:12,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:12,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:12,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:12,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:12,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:12,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 365 transitions, 4262 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 19:18:12,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:12,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:12,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:13,168 INFO L124 PetriNetUnfolderBase]: 851/1537 cut-off events. [2024-06-21 19:18:13,169 INFO L125 PetriNetUnfolderBase]: For 240680/240680 co-relation queries the response was YES. [2024-06-21 19:18:13,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11946 conditions, 1537 events. 851/1537 cut-off events. For 240680/240680 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 8833 event pairs, 159 based on Foata normal form. 2/1537 useless extension candidates. Maximal degree in co-relation 11765. Up to 1467 conditions per place. [2024-06-21 19:18:13,185 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 352 selfloop transitions, 29 changer transitions 0/383 dead transitions. [2024-06-21 19:18:13,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 383 transitions, 5209 flow [2024-06-21 19:18:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 19:18:13,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 19:18:13,186 INFO L175 Difference]: Start difference. First operand has 401 places, 365 transitions, 4262 flow. Second operand 11 states and 120 transitions. [2024-06-21 19:18:13,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 383 transitions, 5209 flow [2024-06-21 19:18:13,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 383 transitions, 5007 flow, removed 18 selfloop flow, removed 13 redundant places. [2024-06-21 19:18:13,957 INFO L231 Difference]: Finished difference. Result has 399 places, 370 transitions, 4264 flow [2024-06-21 19:18:13,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4264, PETRI_PLACES=399, PETRI_TRANSITIONS=370} [2024-06-21 19:18:13,957 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 369 predicate places. [2024-06-21 19:18:13,957 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 370 transitions, 4264 flow [2024-06-21 19:18:13,957 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 19:18:13,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:13,957 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 19:18:13,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 19:18:13,957 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 19:18:13,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:13,958 INFO L85 PathProgramCache]: Analyzing trace with hash -254843488, now seen corresponding path program 17 times [2024-06-21 19:18:13,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:13,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781066341] [2024-06-21 19:18:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:13,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:15,605 INFO 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 19:18:15,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:15,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781066341] [2024-06-21 19:18:15,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781066341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:15,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:15,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:15,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600790670] [2024-06-21 19:18:15,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:15,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:15,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:15,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:15,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:15,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:15,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 370 transitions, 4264 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 19:18:15,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:15,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:15,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:16,285 INFO L124 PetriNetUnfolderBase]: 857/1547 cut-off events. [2024-06-21 19:18:16,286 INFO L125 PetriNetUnfolderBase]: For 241142/241142 co-relation queries the response was YES. [2024-06-21 19:18:16,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11930 conditions, 1547 events. 857/1547 cut-off events. For 241142/241142 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 8920 event pairs, 155 based on Foata normal form. 2/1547 useless extension candidates. Maximal degree in co-relation 11750. Up to 1360 conditions per place. [2024-06-21 19:18:16,304 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 319 selfloop transitions, 67 changer transitions 0/388 dead transitions. [2024-06-21 19:18:16,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 388 transitions, 5466 flow [2024-06-21 19:18:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:18:16,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:18:16,305 INFO L175 Difference]: Start difference. First operand has 399 places, 370 transitions, 4264 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:18:16,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 388 transitions, 5466 flow [2024-06-21 19:18:17,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 388 transitions, 5354 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 19:18:17,031 INFO L231 Difference]: Finished difference. Result has 403 places, 373 transitions, 4412 flow [2024-06-21 19:18:17,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4412, PETRI_PLACES=403, PETRI_TRANSITIONS=373} [2024-06-21 19:18:17,031 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 373 predicate places. [2024-06-21 19:18:17,031 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 373 transitions, 4412 flow [2024-06-21 19:18:17,031 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 19:18:17,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:17,032 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 19:18:17,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 19:18:17,032 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 19:18:17,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:17,032 INFO L85 PathProgramCache]: Analyzing trace with hash -254670508, now seen corresponding path program 18 times [2024-06-21 19:18:17,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:17,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759150963] [2024-06-21 19:18:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:17,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:18,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:18,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759150963] [2024-06-21 19:18:18,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759150963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:18,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:18,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:18,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492272910] [2024-06-21 19:18:18,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:18,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:18,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:18,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:18,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:18,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:18,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 373 transitions, 4412 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 19:18:18,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:18,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:18,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:19,508 INFO L124 PetriNetUnfolderBase]: 863/1557 cut-off events. [2024-06-21 19:18:19,508 INFO L125 PetriNetUnfolderBase]: For 244919/244919 co-relation queries the response was YES. [2024-06-21 19:18:19,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12110 conditions, 1557 events. 863/1557 cut-off events. For 244919/244919 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 8959 event pairs, 161 based on Foata normal form. 2/1557 useless extension candidates. Maximal degree in co-relation 11929. Up to 1490 conditions per place. [2024-06-21 19:18:19,524 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 347 selfloop transitions, 37 changer transitions 0/386 dead transitions. [2024-06-21 19:18:19,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 386 transitions, 5330 flow [2024-06-21 19:18:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 19:18:19,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 19:18:19,525 INFO L175 Difference]: Start difference. First operand has 403 places, 373 transitions, 4412 flow. Second operand 11 states and 123 transitions. [2024-06-21 19:18:19,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 386 transitions, 5330 flow [2024-06-21 19:18:20,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 386 transitions, 5025 flow, removed 51 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:20,303 INFO L231 Difference]: Finished difference. Result has 405 places, 376 transitions, 4319 flow [2024-06-21 19:18:20,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4319, PETRI_PLACES=405, PETRI_TRANSITIONS=376} [2024-06-21 19:18:20,303 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 375 predicate places. [2024-06-21 19:18:20,303 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 376 transitions, 4319 flow [2024-06-21 19:18:20,303 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 19:18:20,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:20,303 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 19:18:20,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 19:18:20,304 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 19:18:20,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:20,304 INFO L85 PathProgramCache]: Analyzing trace with hash -248407888, now seen corresponding path program 19 times [2024-06-21 19:18:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:20,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549344245] [2024-06-21 19:18:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:20,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:21,851 INFO 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 19:18:21,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:21,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549344245] [2024-06-21 19:18:21,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549344245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:21,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:21,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:21,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510954125] [2024-06-21 19:18:21,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:21,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:21,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:21,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:21,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:21,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:21,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 376 transitions, 4319 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 19:18:21,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:21,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:21,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:22,569 INFO L124 PetriNetUnfolderBase]: 859/1551 cut-off events. [2024-06-21 19:18:22,569 INFO L125 PetriNetUnfolderBase]: For 229955/229955 co-relation queries the response was YES. [2024-06-21 19:18:22,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11591 conditions, 1551 events. 859/1551 cut-off events. For 229955/229955 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 8939 event pairs, 159 based on Foata normal form. 2/1551 useless extension candidates. Maximal degree in co-relation 11409. Up to 1440 conditions per place. [2024-06-21 19:18:22,589 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 347 selfloop transitions, 41 changer transitions 0/390 dead transitions. [2024-06-21 19:18:22,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 390 transitions, 5151 flow [2024-06-21 19:18:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:18:22,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:18:22,590 INFO L175 Difference]: Start difference. First operand has 405 places, 376 transitions, 4319 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:18:22,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 390 transitions, 5151 flow [2024-06-21 19:18:23,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 390 transitions, 4979 flow, removed 51 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:23,365 INFO L231 Difference]: Finished difference. Result has 407 places, 376 transitions, 4235 flow [2024-06-21 19:18:23,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4235, PETRI_PLACES=407, PETRI_TRANSITIONS=376} [2024-06-21 19:18:23,365 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2024-06-21 19:18:23,365 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 376 transitions, 4235 flow [2024-06-21 19:18:23,365 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 19:18:23,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:23,365 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 19:18:23,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 19:18:23,365 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 19:18:23,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:23,366 INFO L85 PathProgramCache]: Analyzing trace with hash -248414398, now seen corresponding path program 20 times [2024-06-21 19:18:23,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:23,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211533403] [2024-06-21 19:18:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:23,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:24,927 INFO 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 19:18:24,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:24,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211533403] [2024-06-21 19:18:24,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211533403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:24,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:24,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:24,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106370708] [2024-06-21 19:18:24,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:24,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:24,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:24,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:24,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:25,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:25,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 376 transitions, 4235 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 19:18:25,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:25,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:25,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:25,601 INFO L124 PetriNetUnfolderBase]: 855/1545 cut-off events. [2024-06-21 19:18:25,601 INFO L125 PetriNetUnfolderBase]: For 215319/215319 co-relation queries the response was YES. [2024-06-21 19:18:25,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11197 conditions, 1545 events. 855/1545 cut-off events. For 215319/215319 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 8903 event pairs, 158 based on Foata normal form. 2/1545 useless extension candidates. Maximal degree in co-relation 11014. Up to 1478 conditions per place. [2024-06-21 19:18:25,620 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 350 selfloop transitions, 34 changer transitions 0/386 dead transitions. [2024-06-21 19:18:25,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 386 transitions, 5027 flow [2024-06-21 19:18:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 19:18:25,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 19:18:25,621 INFO L175 Difference]: Start difference. First operand has 407 places, 376 transitions, 4235 flow. Second operand 11 states and 122 transitions. [2024-06-21 19:18:25,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 386 transitions, 5027 flow [2024-06-21 19:18:26,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 386 transitions, 4845 flow, removed 37 selfloop flow, removed 11 redundant places. [2024-06-21 19:18:26,364 INFO L231 Difference]: Finished difference. Result has 407 places, 376 transitions, 4127 flow [2024-06-21 19:18:26,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4127, PETRI_PLACES=407, PETRI_TRANSITIONS=376} [2024-06-21 19:18:26,364 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2024-06-21 19:18:26,364 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 376 transitions, 4127 flow [2024-06-21 19:18:26,364 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 19:18:26,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:26,365 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 19:18:26,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 19:18:26,365 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 19:18:26,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash -886587102, now seen corresponding path program 5 times [2024-06-21 19:18:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:26,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703599277] [2024-06-21 19:18:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:26,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:27,929 INFO 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 19:18:27,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:27,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703599277] [2024-06-21 19:18:27,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703599277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:27,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:27,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:27,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641779279] [2024-06-21 19:18:27,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:27,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:27,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:28,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:28,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 376 transitions, 4127 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 19:18:28,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:28,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:28,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:28,506 INFO L124 PetriNetUnfolderBase]: 859/1553 cut-off events. [2024-06-21 19:18:28,507 INFO L125 PetriNetUnfolderBase]: For 217601/217601 co-relation queries the response was YES. [2024-06-21 19:18:28,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11150 conditions, 1553 events. 859/1553 cut-off events. For 217601/217601 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 8992 event pairs, 157 based on Foata normal form. 2/1553 useless extension candidates. Maximal degree in co-relation 10967. Up to 1510 conditions per place. [2024-06-21 19:18:28,524 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 365 selfloop transitions, 21 changer transitions 0/388 dead transitions. [2024-06-21 19:18:28,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 388 transitions, 4962 flow [2024-06-21 19:18:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:28,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 19:18:28,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 19:18:28,525 INFO L175 Difference]: Start difference. First operand has 407 places, 376 transitions, 4127 flow. Second operand 11 states and 116 transitions. [2024-06-21 19:18:28,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 388 transitions, 4962 flow [2024-06-21 19:18:29,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 388 transitions, 4724 flow, removed 52 selfloop flow, removed 11 redundant places. [2024-06-21 19:18:29,195 INFO L231 Difference]: Finished difference. Result has 407 places, 377 transitions, 3971 flow [2024-06-21 19:18:29,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3971, PETRI_PLACES=407, PETRI_TRANSITIONS=377} [2024-06-21 19:18:29,196 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2024-06-21 19:18:29,196 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 377 transitions, 3971 flow [2024-06-21 19:18:29,196 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 19:18:29,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:29,196 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 19:18:29,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 19:18:29,196 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 19:18:29,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2110015530, now seen corresponding path program 25 times [2024-06-21 19:18:29,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:29,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869278987] [2024-06-21 19:18:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:29,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:30,658 INFO 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 19:18:30,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:30,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869278987] [2024-06-21 19:18:30,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869278987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:30,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:30,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:30,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180533638] [2024-06-21 19:18:30,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:30,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:30,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:30,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:30,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:30,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 377 transitions, 3971 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 19:18:30,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:30,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:30,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:31,262 INFO L124 PetriNetUnfolderBase]: 856/1548 cut-off events. [2024-06-21 19:18:31,262 INFO L125 PetriNetUnfolderBase]: For 201688/201688 co-relation queries the response was YES. [2024-06-21 19:18:31,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10669 conditions, 1548 events. 856/1548 cut-off events. For 201688/201688 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 8950 event pairs, 159 based on Foata normal form. 2/1548 useless extension candidates. Maximal degree in co-relation 10486. Up to 1499 conditions per place. [2024-06-21 19:18:31,281 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 360 selfloop transitions, 25 changer transitions 0/387 dead transitions. [2024-06-21 19:18:31,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 387 transitions, 4763 flow [2024-06-21 19:18:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 19:18:31,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 19:18:31,281 INFO L175 Difference]: Start difference. First operand has 407 places, 377 transitions, 3971 flow. Second operand 11 states and 117 transitions. [2024-06-21 19:18:31,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 387 transitions, 4763 flow [2024-06-21 19:18:31,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 387 transitions, 4640 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-21 19:18:31,916 INFO L231 Difference]: Finished difference. Result has 408 places, 377 transitions, 3902 flow [2024-06-21 19:18:31,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3902, PETRI_PLACES=408, PETRI_TRANSITIONS=377} [2024-06-21 19:18:31,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 378 predicate places. [2024-06-21 19:18:31,917 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 377 transitions, 3902 flow [2024-06-21 19:18:31,917 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 19:18:31,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:31,917 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 19:18:31,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 19:18:31,917 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 19:18:31,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:31,917 INFO L85 PathProgramCache]: Analyzing trace with hash -591011712, now seen corresponding path program 6 times [2024-06-21 19:18:31,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:31,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190867863] [2024-06-21 19:18:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:31,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:33,295 INFO 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 19:18:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:33,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190867863] [2024-06-21 19:18:33,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190867863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:33,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:33,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:33,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007959093] [2024-06-21 19:18:33,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:33,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:33,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:33,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:33,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 377 transitions, 3902 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 19:18:33,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:33,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:33,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:33,975 INFO L124 PetriNetUnfolderBase]: 860/1556 cut-off events. [2024-06-21 19:18:33,975 INFO L125 PetriNetUnfolderBase]: For 204020/204020 co-relation queries the response was YES. [2024-06-21 19:18:33,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10628 conditions, 1556 events. 860/1556 cut-off events. For 204020/204020 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 8998 event pairs, 156 based on Foata normal form. 2/1556 useless extension candidates. Maximal degree in co-relation 10445. Up to 1517 conditions per place. [2024-06-21 19:18:33,993 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 370 selfloop transitions, 17 changer transitions 0/389 dead transitions. [2024-06-21 19:18:33,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 389 transitions, 4736 flow [2024-06-21 19:18:33,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 19:18:33,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-21 19:18:33,994 INFO L175 Difference]: Start difference. First operand has 408 places, 377 transitions, 3902 flow. Second operand 11 states and 112 transitions. [2024-06-21 19:18:33,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 389 transitions, 4736 flow [2024-06-21 19:18:34,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 389 transitions, 4666 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 19:18:34,659 INFO L231 Difference]: Finished difference. Result has 407 places, 378 transitions, 3908 flow [2024-06-21 19:18:34,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3908, PETRI_PLACES=407, PETRI_TRANSITIONS=378} [2024-06-21 19:18:34,659 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2024-06-21 19:18:34,659 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 378 transitions, 3908 flow [2024-06-21 19:18:34,659 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 19:18:34,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:34,660 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 19:18:34,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 19:18:34,660 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 19:18:34,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1767062212, now seen corresponding path program 7 times [2024-06-21 19:18:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191051794] [2024-06-21 19:18:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:36,104 INFO 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 19:18:36,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:36,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191051794] [2024-06-21 19:18:36,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191051794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:36,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:36,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:36,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120123301] [2024-06-21 19:18:36,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:36,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:36,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:36,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:36,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:36,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 378 transitions, 3908 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 19:18:36,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:36,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:36,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:36,901 INFO L124 PetriNetUnfolderBase]: 864/1564 cut-off events. [2024-06-21 19:18:36,901 INFO L125 PetriNetUnfolderBase]: For 207818/207818 co-relation queries the response was YES. [2024-06-21 19:18:36,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 1564 events. 864/1564 cut-off events. For 207818/207818 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 9094 event pairs, 160 based on Foata normal form. 2/1564 useless extension candidates. Maximal degree in co-relation 10525. Up to 1518 conditions per place. [2024-06-21 19:18:36,930 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 365 selfloop transitions, 22 changer transitions 0/389 dead transitions. [2024-06-21 19:18:36,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 389 transitions, 4742 flow [2024-06-21 19:18:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 19:18:36,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343108504398827 [2024-06-21 19:18:36,931 INFO L175 Difference]: Start difference. First operand has 407 places, 378 transitions, 3908 flow. Second operand 11 states and 114 transitions. [2024-06-21 19:18:36,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 389 transitions, 4742 flow [2024-06-21 19:18:37,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 389 transitions, 4676 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:37,792 INFO L231 Difference]: Finished difference. Result has 409 places, 379 transitions, 3932 flow [2024-06-21 19:18:37,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3932, PETRI_PLACES=409, PETRI_TRANSITIONS=379} [2024-06-21 19:18:37,793 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 379 predicate places. [2024-06-21 19:18:37,793 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 379 transitions, 3932 flow [2024-06-21 19:18:37,793 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 19:18:37,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:37,793 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 19:18:37,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 19:18:37,793 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 19:18:37,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:37,793 INFO L85 PathProgramCache]: Analyzing trace with hash -897099134, now seen corresponding path program 21 times [2024-06-21 19:18:37,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:37,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009163353] [2024-06-21 19:18:37,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:37,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:39,597 INFO 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 19:18:39,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:39,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009163353] [2024-06-21 19:18:39,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009163353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:39,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:39,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:39,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839056638] [2024-06-21 19:18:39,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:39,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:39,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:39,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:39,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:39,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:39,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 379 transitions, 3932 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 19:18:39,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:39,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:39,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:40,358 INFO L124 PetriNetUnfolderBase]: 860/1558 cut-off events. [2024-06-21 19:18:40,358 INFO L125 PetriNetUnfolderBase]: For 191509/191509 co-relation queries the response was YES. [2024-06-21 19:18:40,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10337 conditions, 1558 events. 860/1558 cut-off events. For 191509/191509 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 9047 event pairs, 159 based on Foata normal form. 2/1558 useless extension candidates. Maximal degree in co-relation 10152. Up to 1488 conditions per place. [2024-06-21 19:18:40,379 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 362 selfloop transitions, 27 changer transitions 0/391 dead transitions. [2024-06-21 19:18:40,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 391 transitions, 4752 flow [2024-06-21 19:18:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 19:18:40,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:18:40,380 INFO L175 Difference]: Start difference. First operand has 409 places, 379 transitions, 3932 flow. Second operand 11 states and 121 transitions. [2024-06-21 19:18:40,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 391 transitions, 4752 flow [2024-06-21 19:18:41,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 391 transitions, 4616 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:41,033 INFO L231 Difference]: Finished difference. Result has 411 places, 379 transitions, 3856 flow [2024-06-21 19:18:41,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3796, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3856, PETRI_PLACES=411, PETRI_TRANSITIONS=379} [2024-06-21 19:18:41,034 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 381 predicate places. [2024-06-21 19:18:41,034 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 379 transitions, 3856 flow [2024-06-21 19:18:41,034 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 19:18:41,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:41,035 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 19:18:41,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 19:18:41,035 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 19:18:41,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:41,035 INFO L85 PathProgramCache]: Analyzing trace with hash -845228206, now seen corresponding path program 26 times [2024-06-21 19:18:41,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:41,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851812610] [2024-06-21 19:18:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:41,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:42,500 INFO 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 19:18:42,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:42,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851812610] [2024-06-21 19:18:42,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851812610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:42,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:42,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:42,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361040657] [2024-06-21 19:18:42,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:42,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:42,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:42,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:42,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:18:42,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 379 transitions, 3856 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:42,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:42,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:18:42,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:43,044 INFO L124 PetriNetUnfolderBase]: 864/1566 cut-off events. [2024-06-21 19:18:43,045 INFO L125 PetriNetUnfolderBase]: For 189862/189862 co-relation queries the response was YES. [2024-06-21 19:18:43,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10232 conditions, 1566 events. 864/1566 cut-off events. For 189862/189862 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 9096 event pairs, 68 based on Foata normal form. 2/1566 useless extension candidates. Maximal degree in co-relation 10046. Up to 799 conditions per place. [2024-06-21 19:18:43,065 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 251 selfloop transitions, 146 changer transitions 0/399 dead transitions. [2024-06-21 19:18:43,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 399 transitions, 4982 flow [2024-06-21 19:18:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 19:18:43,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 19:18:43,066 INFO L175 Difference]: Start difference. First operand has 411 places, 379 transitions, 3856 flow. Second operand 10 states and 131 transitions. [2024-06-21 19:18:43,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 399 transitions, 4982 flow [2024-06-21 19:18:43,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 399 transitions, 4802 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-21 19:18:43,698 INFO L231 Difference]: Finished difference. Result has 408 places, 380 transitions, 3984 flow [2024-06-21 19:18:43,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3984, PETRI_PLACES=408, PETRI_TRANSITIONS=380} [2024-06-21 19:18:43,698 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 378 predicate places. [2024-06-21 19:18:43,698 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 380 transitions, 3984 flow [2024-06-21 19:18:43,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:43,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:43,698 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 19:18:43,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 19:18:43,698 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 19:18:43,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:43,699 INFO L85 PathProgramCache]: Analyzing trace with hash -787015786, now seen corresponding path program 27 times [2024-06-21 19:18:43,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:43,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271441537] [2024-06-21 19:18:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:45,094 INFO 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 19:18:45,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:45,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271441537] [2024-06-21 19:18:45,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271441537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:45,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:45,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:45,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967281332] [2024-06-21 19:18:45,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:45,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:45,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:45,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:18:45,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 380 transitions, 3984 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:45,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:45,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:18:45,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:45,635 INFO L124 PetriNetUnfolderBase]: 868/1574 cut-off events. [2024-06-21 19:18:45,635 INFO L125 PetriNetUnfolderBase]: For 192564/192564 co-relation queries the response was YES. [2024-06-21 19:18:45,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10461 conditions, 1574 events. 868/1574 cut-off events. For 192564/192564 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 9185 event pairs, 94 based on Foata normal form. 2/1574 useless extension candidates. Maximal degree in co-relation 10275. Up to 1260 conditions per place. [2024-06-21 19:18:45,655 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 273 selfloop transitions, 121 changer transitions 0/396 dead transitions. [2024-06-21 19:18:45,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 396 transitions, 4824 flow [2024-06-21 19:18:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 19:18:45,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 19:18:45,656 INFO L175 Difference]: Start difference. First operand has 408 places, 380 transitions, 3984 flow. Second operand 10 states and 131 transitions. [2024-06-21 19:18:45,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 396 transitions, 4824 flow [2024-06-21 19:18:46,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 396 transitions, 4583 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 19:18:46,338 INFO L231 Difference]: Finished difference. Result has 410 places, 381 transitions, 4005 flow [2024-06-21 19:18:46,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3750, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4005, PETRI_PLACES=410, PETRI_TRANSITIONS=381} [2024-06-21 19:18:46,339 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2024-06-21 19:18:46,339 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 381 transitions, 4005 flow [2024-06-21 19:18:46,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:46,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:46,339 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 19:18:46,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 19:18:46,339 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 19:18:46,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -787020436, now seen corresponding path program 28 times [2024-06-21 19:18:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:46,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257630110] [2024-06-21 19:18:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:47,730 INFO 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 19:18:47,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:47,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257630110] [2024-06-21 19:18:47,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257630110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:47,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:47,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:47,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573299213] [2024-06-21 19:18:47,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:47,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:47,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:47,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:47,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:18:47,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 381 transitions, 4005 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:47,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:47,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:18:47,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:48,250 INFO L124 PetriNetUnfolderBase]: 872/1582 cut-off events. [2024-06-21 19:18:48,250 INFO L125 PetriNetUnfolderBase]: For 192590/192590 co-relation queries the response was YES. [2024-06-21 19:18:48,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10437 conditions, 1582 events. 872/1582 cut-off events. For 192590/192590 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9261 event pairs, 92 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 10251. Up to 1240 conditions per place. [2024-06-21 19:18:48,270 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 273 selfloop transitions, 123 changer transitions 0/398 dead transitions. [2024-06-21 19:18:48,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 398 transitions, 4846 flow [2024-06-21 19:18:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 19:18:48,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 19:18:48,272 INFO L175 Difference]: Start difference. First operand has 410 places, 381 transitions, 4005 flow. Second operand 10 states and 133 transitions. [2024-06-21 19:18:48,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 398 transitions, 4846 flow [2024-06-21 19:18:48,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 398 transitions, 4562 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:18:48,956 INFO L231 Difference]: Finished difference. Result has 410 places, 382 transitions, 3982 flow [2024-06-21 19:18:48,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3721, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3982, PETRI_PLACES=410, PETRI_TRANSITIONS=382} [2024-06-21 19:18:48,957 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2024-06-21 19:18:48,957 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 382 transitions, 3982 flow [2024-06-21 19:18:48,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:48,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:48,957 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 19:18:48,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 19:18:48,957 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 19:18:48,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash -787135756, now seen corresponding path program 29 times [2024-06-21 19:18:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:48,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42405435] [2024-06-21 19:18:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:48,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:50,406 INFO 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 19:18:50,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:50,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42405435] [2024-06-21 19:18:50,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42405435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:50,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:50,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:50,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502796592] [2024-06-21 19:18:50,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:50,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:50,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:50,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:50,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:18:50,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 382 transitions, 3982 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:50,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:50,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:18:50,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:50,989 INFO L124 PetriNetUnfolderBase]: 876/1590 cut-off events. [2024-06-21 19:18:50,989 INFO L125 PetriNetUnfolderBase]: For 192796/192796 co-relation queries the response was YES. [2024-06-21 19:18:51,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10395 conditions, 1590 events. 876/1590 cut-off events. For 192796/192796 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 9327 event pairs, 88 based on Foata normal form. 2/1590 useless extension candidates. Maximal degree in co-relation 10210. Up to 1204 conditions per place. [2024-06-21 19:18:51,017 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 273 selfloop transitions, 125 changer transitions 0/400 dead transitions. [2024-06-21 19:18:51,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 400 transitions, 4831 flow [2024-06-21 19:18:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 19:18:51,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 19:18:51,018 INFO L175 Difference]: Start difference. First operand has 410 places, 382 transitions, 3982 flow. Second operand 10 states and 135 transitions. [2024-06-21 19:18:51,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 400 transitions, 4831 flow [2024-06-21 19:18:51,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 400 transitions, 4583 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:51,639 INFO L231 Difference]: Finished difference. Result has 411 places, 383 transitions, 4001 flow [2024-06-21 19:18:51,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4001, PETRI_PLACES=411, PETRI_TRANSITIONS=383} [2024-06-21 19:18:51,640 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 381 predicate places. [2024-06-21 19:18:51,640 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 383 transitions, 4001 flow [2024-06-21 19:18:51,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:51,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:51,640 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 19:18:51,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 19:18:51,640 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 19:18:51,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:51,640 INFO L85 PathProgramCache]: Analyzing trace with hash -787015600, now seen corresponding path program 22 times [2024-06-21 19:18:51,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:51,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757098642] [2024-06-21 19:18:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:51,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:53,277 INFO 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 19:18:53,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:53,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757098642] [2024-06-21 19:18:53,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757098642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:53,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:53,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:53,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144258741] [2024-06-21 19:18:53,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:53,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:53,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:53,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:18:53,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 383 transitions, 4001 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:53,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:53,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:18:53,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:53,910 INFO L124 PetriNetUnfolderBase]: 882/1600 cut-off events. [2024-06-21 19:18:53,910 INFO L125 PetriNetUnfolderBase]: For 193016/193016 co-relation queries the response was YES. [2024-06-21 19:18:53,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10495 conditions, 1600 events. 882/1600 cut-off events. For 193016/193016 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 9394 event pairs, 107 based on Foata normal form. 2/1600 useless extension candidates. Maximal degree in co-relation 10310. Up to 950 conditions per place. [2024-06-21 19:18:53,931 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 210 selfloop transitions, 192 changer transitions 0/404 dead transitions. [2024-06-21 19:18:53,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 404 transitions, 5213 flow [2024-06-21 19:18:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-21 19:18:53,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483870967741935 [2024-06-21 19:18:53,932 INFO L175 Difference]: Start difference. First operand has 411 places, 383 transitions, 4001 flow. Second operand 10 states and 139 transitions. [2024-06-21 19:18:53,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 404 transitions, 5213 flow [2024-06-21 19:18:54,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 404 transitions, 4957 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:54,568 INFO L231 Difference]: Finished difference. Result has 412 places, 387 transitions, 4219 flow [2024-06-21 19:18:54,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3747, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4219, PETRI_PLACES=412, PETRI_TRANSITIONS=387} [2024-06-21 19:18:54,568 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2024-06-21 19:18:54,569 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 387 transitions, 4219 flow [2024-06-21 19:18:54,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:54,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:54,569 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 19:18:54,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 19:18:54,569 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 19:18:54,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:54,569 INFO L85 PathProgramCache]: Analyzing trace with hash 68995036, now seen corresponding path program 23 times [2024-06-21 19:18:54,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:54,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901684010] [2024-06-21 19:18:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:54,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:56,069 INFO 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 19:18:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901684010] [2024-06-21 19:18:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901684010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:56,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:56,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594819176] [2024-06-21 19:18:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:56,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:56,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:56,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 387 transitions, 4219 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 19:18:56,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:56,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:56,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:56,978 INFO L124 PetriNetUnfolderBase]: 888/1610 cut-off events. [2024-06-21 19:18:56,978 INFO L125 PetriNetUnfolderBase]: For 193425/193425 co-relation queries the response was YES. [2024-06-21 19:18:56,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10732 conditions, 1610 events. 888/1610 cut-off events. For 193425/193425 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 9472 event pairs, 97 based on Foata normal form. 2/1610 useless extension candidates. Maximal degree in co-relation 10547. Up to 1301 conditions per place. [2024-06-21 19:18:56,999 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 302 selfloop transitions, 98 changer transitions 0/402 dead transitions. [2024-06-21 19:18:56,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 402 transitions, 5102 flow [2024-06-21 19:18:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 19:18:56,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 19:18:56,999 INFO L175 Difference]: Start difference. First operand has 412 places, 387 transitions, 4219 flow. Second operand 10 states and 124 transitions. [2024-06-21 19:18:57,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 402 transitions, 5102 flow [2024-06-21 19:18:57,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 402 transitions, 4947 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 19:18:57,741 INFO L231 Difference]: Finished difference. Result has 415 places, 389 transitions, 4312 flow [2024-06-21 19:18:57,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4312, PETRI_PLACES=415, PETRI_TRANSITIONS=389} [2024-06-21 19:18:57,742 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 385 predicate places. [2024-06-21 19:18:57,742 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 389 transitions, 4312 flow [2024-06-21 19:18:57,742 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 19:18:57,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:57,742 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 19:18:57,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 19:18:57,742 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 19:18:57,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:57,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1905072140, now seen corresponding path program 24 times [2024-06-21 19:18:57,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:57,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815451267] [2024-06-21 19:18:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:57,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:59,193 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 19:18:59,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815451267] [2024-06-21 19:18:59,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815451267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:59,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:59,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:59,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044699454] [2024-06-21 19:18:59,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:59,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:59,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:59,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:18:59,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 389 transitions, 4312 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:59,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:59,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:18:59,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:59,778 INFO L124 PetriNetUnfolderBase]: 894/1620 cut-off events. [2024-06-21 19:18:59,778 INFO L125 PetriNetUnfolderBase]: For 193535/193535 co-relation queries the response was YES. [2024-06-21 19:18:59,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10943 conditions, 1620 events. 894/1620 cut-off events. For 193535/193535 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 9524 event pairs, 98 based on Foata normal form. 2/1620 useless extension candidates. Maximal degree in co-relation 10757. Up to 1284 conditions per place. [2024-06-21 19:18:59,799 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 295 selfloop transitions, 109 changer transitions 0/406 dead transitions. [2024-06-21 19:18:59,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 406 transitions, 5216 flow [2024-06-21 19:18:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 19:18:59,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 19:18:59,800 INFO L175 Difference]: Start difference. First operand has 415 places, 389 transitions, 4312 flow. Second operand 10 states and 137 transitions. [2024-06-21 19:18:59,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 406 transitions, 5216 flow [2024-06-21 19:19:00,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 406 transitions, 4996 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 19:19:00,579 INFO L231 Difference]: Finished difference. Result has 417 places, 391 transitions, 4365 flow [2024-06-21 19:19:00,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4092, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4365, PETRI_PLACES=417, PETRI_TRANSITIONS=391} [2024-06-21 19:19:00,579 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 387 predicate places. [2024-06-21 19:19:00,579 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 391 transitions, 4365 flow [2024-06-21 19:19:00,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:00,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:00,579 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 19:19:00,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 19:19:00,580 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 19:19:00,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1905071954, now seen corresponding path program 30 times [2024-06-21 19:19:00,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:00,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311966311] [2024-06-21 19:19:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:00,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:02,019 INFO 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 19:19:02,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:02,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311966311] [2024-06-21 19:19:02,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311966311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:02,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:02,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:02,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032026990] [2024-06-21 19:19:02,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:02,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:02,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:02,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:02,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 391 transitions, 4365 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:02,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:02,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:02,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:02,704 INFO L124 PetriNetUnfolderBase]: 898/1628 cut-off events. [2024-06-21 19:19:02,704 INFO L125 PetriNetUnfolderBase]: For 196212/196212 co-relation queries the response was YES. [2024-06-21 19:19:02,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10997 conditions, 1628 events. 898/1628 cut-off events. For 196212/196212 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 9563 event pairs, 90 based on Foata normal form. 2/1628 useless extension candidates. Maximal degree in co-relation 10810. Up to 1454 conditions per place. [2024-06-21 19:19:02,726 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 335 selfloop transitions, 67 changer transitions 0/404 dead transitions. [2024-06-21 19:19:02,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 404 transitions, 5208 flow [2024-06-21 19:19:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 19:19:02,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 19:19:02,727 INFO L175 Difference]: Start difference. First operand has 417 places, 391 transitions, 4365 flow. Second operand 10 states and 128 transitions. [2024-06-21 19:19:02,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 404 transitions, 5208 flow [2024-06-21 19:19:03,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 404 transitions, 4963 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:03,515 INFO L231 Difference]: Finished difference. Result has 418 places, 392 transitions, 4273 flow [2024-06-21 19:19:03,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4120, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4273, PETRI_PLACES=418, PETRI_TRANSITIONS=392} [2024-06-21 19:19:03,515 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 388 predicate places. [2024-06-21 19:19:03,515 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 392 transitions, 4273 flow [2024-06-21 19:19:03,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:03,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:03,515 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 19:19:03,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 19:19:03,515 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 19:19:03,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1904894324, now seen corresponding path program 31 times [2024-06-21 19:19:03,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:03,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772611955] [2024-06-21 19:19:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:03,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:04,925 INFO 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 19:19:04,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772611955] [2024-06-21 19:19:04,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772611955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:04,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:04,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:04,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017968044] [2024-06-21 19:19:04,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:04,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:04,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:04,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:04,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:05,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:05,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 392 transitions, 4273 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:05,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:05,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:05,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:05,650 INFO L124 PetriNetUnfolderBase]: 909/1649 cut-off events. [2024-06-21 19:19:05,650 INFO L125 PetriNetUnfolderBase]: For 215139/215139 co-relation queries the response was YES. [2024-06-21 19:19:05,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 1649 events. 909/1649 cut-off events. For 215139/215139 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 9737 event pairs, 91 based on Foata normal form. 2/1649 useless extension candidates. Maximal degree in co-relation 11064. Up to 1420 conditions per place. [2024-06-21 19:19:05,666 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 329 selfloop transitions, 77 changer transitions 0/408 dead transitions. [2024-06-21 19:19:05,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 408 transitions, 5421 flow [2024-06-21 19:19:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 19:19:05,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 19:19:05,667 INFO L175 Difference]: Start difference. First operand has 418 places, 392 transitions, 4273 flow. Second operand 10 states and 131 transitions. [2024-06-21 19:19:05,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 408 transitions, 5421 flow [2024-06-21 19:19:06,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 408 transitions, 5279 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:06,554 INFO L231 Difference]: Finished difference. Result has 419 places, 394 transitions, 4321 flow [2024-06-21 19:19:06,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4321, PETRI_PLACES=419, PETRI_TRANSITIONS=394} [2024-06-21 19:19:06,554 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 389 predicate places. [2024-06-21 19:19:06,555 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 394 transitions, 4321 flow [2024-06-21 19:19:06,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:06,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:06,555 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 19:19:06,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 19:19:06,555 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 19:19:06,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:06,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1904898974, now seen corresponding path program 32 times [2024-06-21 19:19:06,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:06,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889385035] [2024-06-21 19:19:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:06,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:08,029 INFO 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 19:19:08,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:08,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889385035] [2024-06-21 19:19:08,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889385035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:08,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:08,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157513124] [2024-06-21 19:19:08,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:08,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:08,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:08,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:08,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 394 transitions, 4321 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:08,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:08,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:08,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:08,686 INFO L124 PetriNetUnfolderBase]: 906/1644 cut-off events. [2024-06-21 19:19:08,686 INFO L125 PetriNetUnfolderBase]: For 196037/196037 co-relation queries the response was YES. [2024-06-21 19:19:08,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10983 conditions, 1644 events. 906/1644 cut-off events. For 196037/196037 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 9716 event pairs, 94 based on Foata normal form. 2/1644 useless extension candidates. Maximal degree in co-relation 10796. Up to 1458 conditions per place. [2024-06-21 19:19:08,707 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 332 selfloop transitions, 72 changer transitions 0/406 dead transitions. [2024-06-21 19:19:08,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 406 transitions, 5157 flow [2024-06-21 19:19:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:19:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:19:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 19:19:08,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-06-21 19:19:08,708 INFO L175 Difference]: Start difference. First operand has 419 places, 394 transitions, 4321 flow. Second operand 9 states and 122 transitions. [2024-06-21 19:19:08,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 406 transitions, 5157 flow [2024-06-21 19:19:09,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 406 transitions, 5047 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:19:09,465 INFO L231 Difference]: Finished difference. Result has 421 places, 394 transitions, 4361 flow [2024-06-21 19:19:09,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4211, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4361, PETRI_PLACES=421, PETRI_TRANSITIONS=394} [2024-06-21 19:19:09,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 391 predicate places. [2024-06-21 19:19:09,466 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 394 transitions, 4361 flow [2024-06-21 19:19:09,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:09,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:09,466 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 19:19:09,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 19:19:09,466 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 19:19:09,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:09,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1904899160, now seen corresponding path program 25 times [2024-06-21 19:19:09,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:09,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968367676] [2024-06-21 19:19:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:09,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:11,032 INFO 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 19:19:11,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968367676] [2024-06-21 19:19:11,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968367676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:11,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:11,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:11,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314114118] [2024-06-21 19:19:11,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:11,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:11,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:11,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:11,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:11,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 394 transitions, 4361 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:11,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:11,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:11,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:11,765 INFO L124 PetriNetUnfolderBase]: 912/1654 cut-off events. [2024-06-21 19:19:11,766 INFO L125 PetriNetUnfolderBase]: For 196208/196208 co-relation queries the response was YES. [2024-06-21 19:19:11,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11160 conditions, 1654 events. 912/1654 cut-off events. For 196208/196208 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 9782 event pairs, 102 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 10973. Up to 1294 conditions per place. [2024-06-21 19:19:11,786 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 291 selfloop transitions, 118 changer transitions 0/411 dead transitions. [2024-06-21 19:19:11,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 411 transitions, 5279 flow [2024-06-21 19:19:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 19:19:11,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44516129032258067 [2024-06-21 19:19:11,787 INFO L175 Difference]: Start difference. First operand has 421 places, 394 transitions, 4361 flow. Second operand 10 states and 138 transitions. [2024-06-21 19:19:11,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 411 transitions, 5279 flow [2024-06-21 19:19:12,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 411 transitions, 5121 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:12,473 INFO L231 Difference]: Finished difference. Result has 422 places, 396 transitions, 4498 flow [2024-06-21 19:19:12,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4203, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4498, PETRI_PLACES=422, PETRI_TRANSITIONS=396} [2024-06-21 19:19:12,474 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 392 predicate places. [2024-06-21 19:19:12,474 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 396 transitions, 4498 flow [2024-06-21 19:19:12,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:12,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:12,474 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 19:19:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 19:19:12,474 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 19:19:12,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:12,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1900310354, now seen corresponding path program 33 times [2024-06-21 19:19:12,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:12,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566905813] [2024-06-21 19:19:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:12,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:13,881 INFO 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 19:19:13,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:13,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566905813] [2024-06-21 19:19:13,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566905813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:13,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:13,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:13,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970074102] [2024-06-21 19:19:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:13,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:13,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:13,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:13,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:13,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:13,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 396 transitions, 4498 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:13,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:13,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:13,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:14,494 INFO L124 PetriNetUnfolderBase]: 923/1675 cut-off events. [2024-06-21 19:19:14,494 INFO L125 PetriNetUnfolderBase]: For 215683/215683 co-relation queries the response was YES. [2024-06-21 19:19:14,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11640 conditions, 1675 events. 923/1675 cut-off events. For 215683/215683 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 9924 event pairs, 91 based on Foata normal form. 2/1675 useless extension candidates. Maximal degree in co-relation 11452. Up to 1348 conditions per place. [2024-06-21 19:19:14,516 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 321 selfloop transitions, 90 changer transitions 0/413 dead transitions. [2024-06-21 19:19:14,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 413 transitions, 5662 flow [2024-06-21 19:19:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 19:19:14,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 19:19:14,517 INFO L175 Difference]: Start difference. First operand has 422 places, 396 transitions, 4498 flow. Second operand 10 states and 133 transitions. [2024-06-21 19:19:14,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 413 transitions, 5662 flow [2024-06-21 19:19:15,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 413 transitions, 5393 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:15,385 INFO L231 Difference]: Finished difference. Result has 423 places, 398 transitions, 4449 flow [2024-06-21 19:19:15,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4231, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4449, PETRI_PLACES=423, PETRI_TRANSITIONS=398} [2024-06-21 19:19:15,385 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 393 predicate places. [2024-06-21 19:19:15,385 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 398 transitions, 4449 flow [2024-06-21 19:19:15,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:15,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:15,385 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 19:19:15,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 19:19:15,385 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 19:19:15,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1900425674, now seen corresponding path program 34 times [2024-06-21 19:19:15,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:15,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113129862] [2024-06-21 19:19:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:15,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:16,982 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 19:19:16,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:16,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113129862] [2024-06-21 19:19:16,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113129862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:16,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:16,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:16,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110081262] [2024-06-21 19:19:16,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:16,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:16,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:16,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:17,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:17,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 398 transitions, 4449 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:17,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:17,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:17,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:17,658 INFO L124 PetriNetUnfolderBase]: 927/1683 cut-off events. [2024-06-21 19:19:17,658 INFO L125 PetriNetUnfolderBase]: For 215680/215680 co-relation queries the response was YES. [2024-06-21 19:19:17,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 1683 events. 927/1683 cut-off events. For 215680/215680 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 10016 event pairs, 102 based on Foata normal form. 2/1683 useless extension candidates. Maximal degree in co-relation 11424. Up to 1295 conditions per place. [2024-06-21 19:19:17,681 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 295 selfloop transitions, 118 changer transitions 0/415 dead transitions. [2024-06-21 19:19:17,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 415 transitions, 5617 flow [2024-06-21 19:19:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 19:19:17,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 19:19:17,682 INFO L175 Difference]: Start difference. First operand has 423 places, 398 transitions, 4449 flow. Second operand 10 states and 140 transitions. [2024-06-21 19:19:17,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 415 transitions, 5617 flow [2024-06-21 19:19:18,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 415 transitions, 5497 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:19:18,408 INFO L231 Difference]: Finished difference. Result has 426 places, 399 transitions, 4590 flow [2024-06-21 19:19:18,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4590, PETRI_PLACES=426, PETRI_TRANSITIONS=399} [2024-06-21 19:19:18,408 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2024-06-21 19:19:18,409 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 399 transitions, 4590 flow [2024-06-21 19:19:18,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:18,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:18,409 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 19:19:18,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 19:19:18,409 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 19:19:18,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:18,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1900430510, now seen corresponding path program 26 times [2024-06-21 19:19:18,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:18,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403388431] [2024-06-21 19:19:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:18,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:19,992 INFO 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 19:19:19,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:19,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403388431] [2024-06-21 19:19:19,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403388431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:19,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:19,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:19,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011152542] [2024-06-21 19:19:19,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:19,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:19,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:20,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:20,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 399 transitions, 4590 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:20,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:20,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:20,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:20,701 INFO L124 PetriNetUnfolderBase]: 933/1693 cut-off events. [2024-06-21 19:19:20,701 INFO L125 PetriNetUnfolderBase]: For 216259/216259 co-relation queries the response was YES. [2024-06-21 19:19:20,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11894 conditions, 1693 events. 933/1693 cut-off events. For 216259/216259 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 10084 event pairs, 107 based on Foata normal form. 2/1693 useless extension candidates. Maximal degree in co-relation 11705. Up to 1303 conditions per place. [2024-06-21 19:19:20,723 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 284 selfloop transitions, 129 changer transitions 0/415 dead transitions. [2024-06-21 19:19:20,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 415 transitions, 5515 flow [2024-06-21 19:19:20,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-21 19:19:20,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483870967741935 [2024-06-21 19:19:20,724 INFO L175 Difference]: Start difference. First operand has 426 places, 399 transitions, 4590 flow. Second operand 10 states and 139 transitions. [2024-06-21 19:19:20,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 415 transitions, 5515 flow [2024-06-21 19:19:21,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 415 transitions, 5205 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 19:19:21,510 INFO L231 Difference]: Finished difference. Result has 426 places, 401 transitions, 4601 flow [2024-06-21 19:19:21,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4280, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4601, PETRI_PLACES=426, PETRI_TRANSITIONS=401} [2024-06-21 19:19:21,511 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2024-06-21 19:19:21,511 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 401 transitions, 4601 flow [2024-06-21 19:19:21,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:21,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:21,511 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 19:19:21,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 19:19:21,511 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 19:19:21,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:21,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1649834474, now seen corresponding path program 35 times [2024-06-21 19:19:21,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:21,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163129554] [2024-06-21 19:19:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:21,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:23,203 INFO 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 19:19:23,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:23,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163129554] [2024-06-21 19:19:23,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163129554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:23,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:23,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:23,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3958569] [2024-06-21 19:19:23,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:23,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:23,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:23,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:23,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 401 transitions, 4601 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:23,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:23,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:23,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:23,942 INFO L124 PetriNetUnfolderBase]: 930/1688 cut-off events. [2024-06-21 19:19:23,943 INFO L125 PetriNetUnfolderBase]: For 196852/196852 co-relation queries the response was YES. [2024-06-21 19:19:23,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11477 conditions, 1688 events. 930/1688 cut-off events. For 196852/196852 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 10031 event pairs, 105 based on Foata normal form. 2/1688 useless extension candidates. Maximal degree in co-relation 11289. Up to 1331 conditions per place. [2024-06-21 19:19:23,966 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 297 selfloop transitions, 116 changer transitions 0/415 dead transitions. [2024-06-21 19:19:23,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 415 transitions, 5470 flow [2024-06-21 19:19:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 19:19:23,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 19:19:23,967 INFO L175 Difference]: Start difference. First operand has 426 places, 401 transitions, 4601 flow. Second operand 10 states and 137 transitions. [2024-06-21 19:19:23,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 415 transitions, 5470 flow [2024-06-21 19:19:24,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 415 transitions, 5165 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-21 19:19:24,731 INFO L231 Difference]: Finished difference. Result has 426 places, 401 transitions, 4534 flow [2024-06-21 19:19:24,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4296, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4534, PETRI_PLACES=426, PETRI_TRANSITIONS=401} [2024-06-21 19:19:24,731 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2024-06-21 19:19:24,732 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 401 transitions, 4534 flow [2024-06-21 19:19:24,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:24,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:24,732 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 19:19:24,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 19:19:24,732 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 19:19:24,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:24,732 INFO L85 PathProgramCache]: Analyzing trace with hash -850668932, now seen corresponding path program 36 times [2024-06-21 19:19:24,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:24,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513729537] [2024-06-21 19:19:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:24,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:26,239 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 19:19:26,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:26,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513729537] [2024-06-21 19:19:26,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513729537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:26,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:26,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:26,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306408974] [2024-06-21 19:19:26,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:26,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:26,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:26,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:26,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 401 transitions, 4534 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:26,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:26,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:26,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:26,862 INFO L124 PetriNetUnfolderBase]: 934/1697 cut-off events. [2024-06-21 19:19:26,862 INFO L125 PetriNetUnfolderBase]: For 193505/193505 co-relation queries the response was YES. [2024-06-21 19:19:26,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11405 conditions, 1697 events. 934/1697 cut-off events. For 193505/193505 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 10108 event pairs, 65 based on Foata normal form. 2/1697 useless extension candidates. Maximal degree in co-relation 11218. Up to 1211 conditions per place. [2024-06-21 19:19:26,884 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 291 selfloop transitions, 130 changer transitions 0/423 dead transitions. [2024-06-21 19:19:26,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 423 transitions, 5730 flow [2024-06-21 19:19:26,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 19:19:26,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 19:19:26,886 INFO L175 Difference]: Start difference. First operand has 426 places, 401 transitions, 4534 flow. Second operand 10 states and 140 transitions. [2024-06-21 19:19:26,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 423 transitions, 5730 flow [2024-06-21 19:19:27,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 423 transitions, 5488 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:19:27,628 INFO L231 Difference]: Finished difference. Result has 426 places, 402 transitions, 4575 flow [2024-06-21 19:19:27,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4575, PETRI_PLACES=426, PETRI_TRANSITIONS=402} [2024-06-21 19:19:27,628 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2024-06-21 19:19:27,628 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 402 transitions, 4575 flow [2024-06-21 19:19:27,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:27,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:27,629 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 19:19:27,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 19:19:27,629 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 19:19:27,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:27,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1729637854, now seen corresponding path program 37 times [2024-06-21 19:19:27,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:27,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471878079] [2024-06-21 19:19:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:27,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:29,056 INFO 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 19:19:29,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:29,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471878079] [2024-06-21 19:19:29,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471878079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:29,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:29,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:29,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117327777] [2024-06-21 19:19:29,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:29,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:29,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:29,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:29,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:29,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:29,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 402 transitions, 4575 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:29,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:29,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:29,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:29,707 INFO L124 PetriNetUnfolderBase]: 945/1718 cut-off events. [2024-06-21 19:19:29,707 INFO L125 PetriNetUnfolderBase]: For 212785/212785 co-relation queries the response was YES. [2024-06-21 19:19:29,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11871 conditions, 1718 events. 945/1718 cut-off events. For 212785/212785 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 10306 event pairs, 94 based on Foata normal form. 2/1718 useless extension candidates. Maximal degree in co-relation 11684. Up to 1426 conditions per place. [2024-06-21 19:19:29,729 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 307 selfloop transitions, 115 changer transitions 0/424 dead transitions. [2024-06-21 19:19:29,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 424 transitions, 5790 flow [2024-06-21 19:19:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 19:19:29,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 19:19:29,730 INFO L175 Difference]: Start difference. First operand has 426 places, 402 transitions, 4575 flow. Second operand 10 states and 140 transitions. [2024-06-21 19:19:29,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 424 transitions, 5790 flow [2024-06-21 19:19:30,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 424 transitions, 5420 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 19:19:30,526 INFO L231 Difference]: Finished difference. Result has 426 places, 404 transitions, 4479 flow [2024-06-21 19:19:30,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4479, PETRI_PLACES=426, PETRI_TRANSITIONS=404} [2024-06-21 19:19:30,526 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2024-06-21 19:19:30,526 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 404 transitions, 4479 flow [2024-06-21 19:19:30,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:30,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:30,526 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 19:19:30,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 19:19:30,526 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 19:19:30,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1729642690, now seen corresponding path program 27 times [2024-06-21 19:19:30,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641313256] [2024-06-21 19:19:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:32,043 INFO 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 19:19:32,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641313256] [2024-06-21 19:19:32,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641313256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:32,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:32,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:32,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864861517] [2024-06-21 19:19:32,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:32,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:32,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:32,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:32,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 404 transitions, 4479 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:32,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:32,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:32,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:32,795 INFO L124 PetriNetUnfolderBase]: 951/1728 cut-off events. [2024-06-21 19:19:32,795 INFO L125 PetriNetUnfolderBase]: For 212652/212652 co-relation queries the response was YES. [2024-06-21 19:19:32,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11705 conditions, 1728 events. 951/1728 cut-off events. For 212652/212652 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 10354 event pairs, 97 based on Foata normal form. 2/1728 useless extension candidates. Maximal degree in co-relation 11519. Up to 1167 conditions per place. [2024-06-21 19:19:32,813 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 235 selfloop transitions, 190 changer transitions 0/427 dead transitions. [2024-06-21 19:19:32,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 427 transitions, 5739 flow [2024-06-21 19:19:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-21 19:19:32,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47419354838709676 [2024-06-21 19:19:32,814 INFO L175 Difference]: Start difference. First operand has 426 places, 404 transitions, 4479 flow. Second operand 10 states and 147 transitions. [2024-06-21 19:19:32,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 427 transitions, 5739 flow [2024-06-21 19:19:33,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 427 transitions, 5572 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 19:19:33,552 INFO L231 Difference]: Finished difference. Result has 429 places, 406 transitions, 4757 flow [2024-06-21 19:19:33,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4314, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4757, PETRI_PLACES=429, PETRI_TRANSITIONS=406} [2024-06-21 19:19:33,553 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 399 predicate places. [2024-06-21 19:19:33,553 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 406 transitions, 4757 flow [2024-06-21 19:19:33,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:33,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:33,553 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 19:19:33,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 19:19:33,553 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 19:19:33,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1729642504, now seen corresponding path program 38 times [2024-06-21 19:19:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:33,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878845426] [2024-06-21 19:19:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:35,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:35,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878845426] [2024-06-21 19:19:35,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878845426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:35,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:35,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:35,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118151668] [2024-06-21 19:19:35,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:35,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:35,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:35,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:35,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 406 transitions, 4757 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:35,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:35,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:35,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:35,847 INFO L124 PetriNetUnfolderBase]: 958/1739 cut-off events. [2024-06-21 19:19:35,847 INFO L125 PetriNetUnfolderBase]: For 213498/213498 co-relation queries the response was YES. [2024-06-21 19:19:35,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12168 conditions, 1739 events. 958/1739 cut-off events. For 213498/213498 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 10437 event pairs, 96 based on Foata normal form. 2/1739 useless extension candidates. Maximal degree in co-relation 11981. Up to 1254 conditions per place. [2024-06-21 19:19:35,871 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 260 selfloop transitions, 167 changer transitions 0/429 dead transitions. [2024-06-21 19:19:35,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 429 transitions, 6019 flow [2024-06-21 19:19:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 145 transitions. [2024-06-21 19:19:35,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2024-06-21 19:19:35,872 INFO L175 Difference]: Start difference. First operand has 429 places, 406 transitions, 4757 flow. Second operand 10 states and 145 transitions. [2024-06-21 19:19:35,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 429 transitions, 6019 flow [2024-06-21 19:19:36,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 429 transitions, 5536 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-21 19:19:36,667 INFO L231 Difference]: Finished difference. Result has 430 places, 408 transitions, 4775 flow [2024-06-21 19:19:36,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4775, PETRI_PLACES=430, PETRI_TRANSITIONS=408} [2024-06-21 19:19:36,667 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 400 predicate places. [2024-06-21 19:19:36,667 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 408 transitions, 4775 flow [2024-06-21 19:19:36,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:36,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:36,667 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 19:19:36,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 19:19:36,667 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 19:19:36,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1734284134, now seen corresponding path program 39 times [2024-06-21 19:19:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048397302] [2024-06-21 19:19:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:38,146 INFO 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 19:19:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:38,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048397302] [2024-06-21 19:19:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048397302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:38,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:38,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093237795] [2024-06-21 19:19:38,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:38,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:38,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:38,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 408 transitions, 4775 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:38,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:38,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:38,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:38,851 INFO L124 PetriNetUnfolderBase]: 962/1749 cut-off events. [2024-06-21 19:19:38,851 INFO L125 PetriNetUnfolderBase]: For 209993/209993 co-relation queries the response was YES. [2024-06-21 19:19:38,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12195 conditions, 1749 events. 962/1749 cut-off events. For 209993/209993 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 10464 event pairs, 126 based on Foata normal form. 2/1749 useless extension candidates. Maximal degree in co-relation 12008. Up to 1572 conditions per place. [2024-06-21 19:19:38,874 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 348 selfloop transitions, 74 changer transitions 0/424 dead transitions. [2024-06-21 19:19:38,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 424 transitions, 5679 flow [2024-06-21 19:19:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 19:19:38,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 19:19:38,875 INFO L175 Difference]: Start difference. First operand has 430 places, 408 transitions, 4775 flow. Second operand 10 states and 131 transitions. [2024-06-21 19:19:38,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 424 transitions, 5679 flow [2024-06-21 19:19:39,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 424 transitions, 5432 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:39,627 INFO L231 Difference]: Finished difference. Result has 431 places, 409 transitions, 4699 flow [2024-06-21 19:19:39,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4528, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4699, PETRI_PLACES=431, PETRI_TRANSITIONS=409} [2024-06-21 19:19:39,628 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 401 predicate places. [2024-06-21 19:19:39,628 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 409 transitions, 4699 flow [2024-06-21 19:19:39,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:39,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:39,628 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 19:19:39,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 19:19:39,628 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 19:19:39,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:39,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1734284320, now seen corresponding path program 28 times [2024-06-21 19:19:39,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:39,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029402129] [2024-06-21 19:19:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:41,253 INFO 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 19:19:41,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:41,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029402129] [2024-06-21 19:19:41,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029402129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:41,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:41,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:41,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784343235] [2024-06-21 19:19:41,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:41,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:41,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:41,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:41,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 409 transitions, 4699 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:41,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:41,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:41,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:42,071 INFO L124 PetriNetUnfolderBase]: 978/1775 cut-off events. [2024-06-21 19:19:42,071 INFO L125 PetriNetUnfolderBase]: For 229969/229969 co-relation queries the response was YES. [2024-06-21 19:19:42,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12608 conditions, 1775 events. 978/1775 cut-off events. For 229969/229969 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 10674 event pairs, 130 based on Foata normal form. 2/1775 useless extension candidates. Maximal degree in co-relation 12421. Up to 1425 conditions per place. [2024-06-21 19:19:42,092 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 308 selfloop transitions, 124 changer transitions 0/434 dead transitions. [2024-06-21 19:19:42,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 434 transitions, 6037 flow [2024-06-21 19:19:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2024-06-21 19:19:42,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4612903225806452 [2024-06-21 19:19:42,094 INFO L175 Difference]: Start difference. First operand has 431 places, 409 transitions, 4699 flow. Second operand 10 states and 143 transitions. [2024-06-21 19:19:42,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 434 transitions, 6037 flow [2024-06-21 19:19:42,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 434 transitions, 5877 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:42,983 INFO L231 Difference]: Finished difference. Result has 433 places, 413 transitions, 4936 flow [2024-06-21 19:19:42,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4936, PETRI_PLACES=433, PETRI_TRANSITIONS=413} [2024-06-21 19:19:42,984 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 403 predicate places. [2024-06-21 19:19:42,984 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 413 transitions, 4936 flow [2024-06-21 19:19:42,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:42,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:42,984 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 19:19:42,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 19:19:42,984 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 19:19:42,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1734290830, now seen corresponding path program 29 times [2024-06-21 19:19:42,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:42,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301674122] [2024-06-21 19:19:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:42,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:44,568 INFO 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 19:19:44,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:44,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301674122] [2024-06-21 19:19:44,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301674122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:44,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:44,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:44,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141491659] [2024-06-21 19:19:44,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:44,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:44,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:44,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:44,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:44,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:44,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 413 transitions, 4936 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 19:19:44,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:44,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:44,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:45,521 INFO L124 PetriNetUnfolderBase]: 974/1769 cut-off events. [2024-06-21 19:19:45,521 INFO L125 PetriNetUnfolderBase]: For 211240/211240 co-relation queries the response was YES. [2024-06-21 19:19:45,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12420 conditions, 1769 events. 974/1769 cut-off events. For 211240/211240 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 10666 event pairs, 126 based on Foata normal form. 2/1769 useless extension candidates. Maximal degree in co-relation 12232. Up to 1449 conditions per place. [2024-06-21 19:19:45,544 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 312 selfloop transitions, 124 changer transitions 0/438 dead transitions. [2024-06-21 19:19:45,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 438 transitions, 5920 flow [2024-06-21 19:19:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:19:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:19:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2024-06-21 19:19:45,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37965260545905705 [2024-06-21 19:19:45,545 INFO L175 Difference]: Start difference. First operand has 433 places, 413 transitions, 4936 flow. Second operand 13 states and 153 transitions. [2024-06-21 19:19:45,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 438 transitions, 5920 flow [2024-06-21 19:19:46,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 438 transitions, 5603 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 19:19:46,474 INFO L231 Difference]: Finished difference. Result has 438 places, 420 transitions, 4932 flow [2024-06-21 19:19:46,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4932, PETRI_PLACES=438, PETRI_TRANSITIONS=420} [2024-06-21 19:19:46,474 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 408 predicate places. [2024-06-21 19:19:46,474 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 420 transitions, 4932 flow [2024-06-21 19:19:46,474 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 19:19:46,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:46,474 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 19:19:46,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 19:19:46,474 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 19:19:46,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:46,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1734106504, now seen corresponding path program 40 times [2024-06-21 19:19:46,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:46,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500679910] [2024-06-21 19:19:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:46,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:47,968 INFO 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 19:19:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:47,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500679910] [2024-06-21 19:19:47,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500679910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:47,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:47,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141196791] [2024-06-21 19:19:47,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:47,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:47,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:47,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:47,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:48,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:48,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 420 transitions, 4932 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:48,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:48,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:48,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:48,712 INFO L124 PetriNetUnfolderBase]: 985/1790 cut-off events. [2024-06-21 19:19:48,712 INFO L125 PetriNetUnfolderBase]: For 229448/229448 co-relation queries the response was YES. [2024-06-21 19:19:48,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12732 conditions, 1790 events. 985/1790 cut-off events. For 229448/229448 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 10809 event pairs, 120 based on Foata normal form. 2/1790 useless extension candidates. Maximal degree in co-relation 12544. Up to 1558 conditions per place. [2024-06-21 19:19:48,737 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 353 selfloop transitions, 84 changer transitions 0/439 dead transitions. [2024-06-21 19:19:48,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 439 transitions, 6163 flow [2024-06-21 19:19:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 19:19:48,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 19:19:48,738 INFO L175 Difference]: Start difference. First operand has 438 places, 420 transitions, 4932 flow. Second operand 10 states and 135 transitions. [2024-06-21 19:19:48,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 439 transitions, 6163 flow [2024-06-21 19:19:49,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 439 transitions, 5970 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 19:19:49,703 INFO L231 Difference]: Finished difference. Result has 440 places, 422 transitions, 4950 flow [2024-06-21 19:19:49,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4950, PETRI_PLACES=440, PETRI_TRANSITIONS=422} [2024-06-21 19:19:49,704 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 410 predicate places. [2024-06-21 19:19:49,704 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 422 transitions, 4950 flow [2024-06-21 19:19:49,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:49,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:49,704 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 19:19:49,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 19:19:49,704 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 19:19:49,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1734111340, now seen corresponding path program 30 times [2024-06-21 19:19:49,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:49,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211675712] [2024-06-21 19:19:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:49,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:51,351 INFO 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 19:19:51,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:51,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211675712] [2024-06-21 19:19:51,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211675712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:51,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:51,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:51,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351590184] [2024-06-21 19:19:51,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:51,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:51,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:51,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:51,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:51,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 422 transitions, 4950 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:51,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:51,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:51,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:52,149 INFO L124 PetriNetUnfolderBase]: 991/1800 cut-off events. [2024-06-21 19:19:52,149 INFO L125 PetriNetUnfolderBase]: For 233670/233670 co-relation queries the response was YES. [2024-06-21 19:19:52,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12750 conditions, 1800 events. 991/1800 cut-off events. For 233670/233670 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 10870 event pairs, 130 based on Foata normal form. 2/1800 useless extension candidates. Maximal degree in co-relation 12563. Up to 1429 conditions per place. [2024-06-21 19:19:52,174 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 303 selfloop transitions, 137 changer transitions 0/442 dead transitions. [2024-06-21 19:19:52,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 442 transitions, 5958 flow [2024-06-21 19:19:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 144 transitions. [2024-06-21 19:19:52,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2024-06-21 19:19:52,175 INFO L175 Difference]: Start difference. First operand has 440 places, 422 transitions, 4950 flow. Second operand 10 states and 144 transitions. [2024-06-21 19:19:52,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 442 transitions, 5958 flow [2024-06-21 19:19:53,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 442 transitions, 5831 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 19:19:53,188 INFO L231 Difference]: Finished difference. Result has 442 places, 424 transitions, 5172 flow [2024-06-21 19:19:53,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4823, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5172, PETRI_PLACES=442, PETRI_TRANSITIONS=424} [2024-06-21 19:19:53,188 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 412 predicate places. [2024-06-21 19:19:53,188 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 424 transitions, 5172 flow [2024-06-21 19:19:53,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:53,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:53,189 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 19:19:53,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 19:19:53,189 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 19:19:53,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:53,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1734111154, now seen corresponding path program 41 times [2024-06-21 19:19:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:53,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961160524] [2024-06-21 19:19:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:53,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:54,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:54,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961160524] [2024-06-21 19:19:54,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961160524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:54,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:54,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:54,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427418204] [2024-06-21 19:19:54,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:54,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:54,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:54,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:54,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:54,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:54,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 424 transitions, 5172 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:54,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:54,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:54,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:55,330 INFO L124 PetriNetUnfolderBase]: 988/1795 cut-off events. [2024-06-21 19:19:55,330 INFO L125 PetriNetUnfolderBase]: For 214731/214731 co-relation queries the response was YES. [2024-06-21 19:19:55,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12668 conditions, 1795 events. 988/1795 cut-off events. For 214731/214731 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 10832 event pairs, 123 based on Foata normal form. 2/1795 useless extension candidates. Maximal degree in co-relation 12480. Up to 1606 conditions per place. [2024-06-21 19:19:55,351 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 357 selfloop transitions, 80 changer transitions 0/439 dead transitions. [2024-06-21 19:19:55,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 439 transitions, 6090 flow [2024-06-21 19:19:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 19:19:55,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-06-21 19:19:55,352 INFO L175 Difference]: Start difference. First operand has 442 places, 424 transitions, 5172 flow. Second operand 10 states and 133 transitions. [2024-06-21 19:19:55,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 439 transitions, 6090 flow [2024-06-21 19:19:56,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 439 transitions, 5761 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:56,271 INFO L231 Difference]: Finished difference. Result has 443 places, 424 transitions, 5009 flow [2024-06-21 19:19:56,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4843, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5009, PETRI_PLACES=443, PETRI_TRANSITIONS=424} [2024-06-21 19:19:56,272 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 413 predicate places. [2024-06-21 19:19:56,272 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 424 transitions, 5009 flow [2024-06-21 19:19:56,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:56,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:56,272 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 19:19:56,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 19:19:56,272 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 19:19:56,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:56,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1900517914, now seen corresponding path program 42 times [2024-06-21 19:19:56,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:56,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379159813] [2024-06-21 19:19:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:56,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:57,684 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 19:19:57,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:57,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379159813] [2024-06-21 19:19:57,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379159813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:57,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:57,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:57,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069298331] [2024-06-21 19:19:57,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:57,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:57,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:57,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:19:57,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 424 transitions, 5009 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:57,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:57,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:19:57,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:58,425 INFO L124 PetriNetUnfolderBase]: 992/1800 cut-off events. [2024-06-21 19:19:58,425 INFO L125 PetriNetUnfolderBase]: For 213439/213439 co-relation queries the response was YES. [2024-06-21 19:19:58,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12513 conditions, 1800 events. 992/1800 cut-off events. For 213439/213439 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 10870 event pairs, 93 based on Foata normal form. 2/1800 useless extension candidates. Maximal degree in co-relation 12325. Up to 1626 conditions per place. [2024-06-21 19:19:58,449 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 370 selfloop transitions, 65 changer transitions 0/437 dead transitions. [2024-06-21 19:19:58,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 437 transitions, 5926 flow [2024-06-21 19:19:58,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:19:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:19:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 19:19:58,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 19:19:58,450 INFO L175 Difference]: Start difference. First operand has 443 places, 424 transitions, 5009 flow. Second operand 10 states and 128 transitions. [2024-06-21 19:19:58,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 437 transitions, 5926 flow [2024-06-21 19:19:59,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 437 transitions, 5752 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:19:59,320 INFO L231 Difference]: Finished difference. Result has 443 places, 425 transitions, 4992 flow [2024-06-21 19:19:59,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4835, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4992, PETRI_PLACES=443, PETRI_TRANSITIONS=425} [2024-06-21 19:19:59,320 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 413 predicate places. [2024-06-21 19:19:59,320 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 425 transitions, 4992 flow [2024-06-21 19:19:59,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:59,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:59,320 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 19:19:59,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 19:19:59,320 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 19:19:59,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:59,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1906774024, now seen corresponding path program 43 times [2024-06-21 19:19:59,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:59,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56726464] [2024-06-21 19:19:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:59,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:00,741 INFO 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 19:20:00,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:00,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56726464] [2024-06-21 19:20:00,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56726464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:00,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:00,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:20:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495070590] [2024-06-21 19:20:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:20:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:00,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:20:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:20:00,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:20:00,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 425 transitions, 4992 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:00,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:00,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:20:00,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:01,437 INFO L124 PetriNetUnfolderBase]: 996/1808 cut-off events. [2024-06-21 19:20:01,438 INFO L125 PetriNetUnfolderBase]: For 214146/214146 co-relation queries the response was YES. [2024-06-21 19:20:01,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12535 conditions, 1808 events. 996/1808 cut-off events. For 214146/214146 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 10936 event pairs, 94 based on Foata normal form. 2/1808 useless extension candidates. Maximal degree in co-relation 12347. Up to 1634 conditions per place. [2024-06-21 19:20:01,462 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 369 selfloop transitions, 67 changer transitions 0/438 dead transitions. [2024-06-21 19:20:01,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 438 transitions, 5913 flow [2024-06-21 19:20:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:20:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:20:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 19:20:01,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 19:20:01,462 INFO L175 Difference]: Start difference. First operand has 443 places, 425 transitions, 4992 flow. Second operand 10 states and 127 transitions. [2024-06-21 19:20:01,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 438 transitions, 5913 flow [2024-06-21 19:20:02,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 438 transitions, 5769 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:02,400 INFO L231 Difference]: Finished difference. Result has 444 places, 426 transitions, 5011 flow [2024-06-21 19:20:02,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4848, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5011, PETRI_PLACES=444, PETRI_TRANSITIONS=426} [2024-06-21 19:20:02,401 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 414 predicate places. [2024-06-21 19:20:02,401 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 426 transitions, 5011 flow [2024-06-21 19:20:02,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:02,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:02,401 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 19:20:02,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 19:20:02,401 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 19:20:02,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:02,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1907011360, now seen corresponding path program 31 times [2024-06-21 19:20:02,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:02,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514101711] [2024-06-21 19:20:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:02,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:03,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:03,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514101711] [2024-06-21 19:20:03,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514101711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:03,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:03,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:20:03,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990717001] [2024-06-21 19:20:03,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:03,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:20:03,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:20:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:20:04,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:04,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 426 transitions, 5011 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 19:20:04,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:04,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:04,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:05,117 INFO L124 PetriNetUnfolderBase]: 1014/1838 cut-off events. [2024-06-21 19:20:05,118 INFO L125 PetriNetUnfolderBase]: For 214707/214707 co-relation queries the response was YES. [2024-06-21 19:20:05,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12755 conditions, 1838 events. 1014/1838 cut-off events. For 214707/214707 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 11124 event pairs, 95 based on Foata normal form. 2/1838 useless extension candidates. Maximal degree in co-relation 12567. Up to 1517 conditions per place. [2024-06-21 19:20:05,139 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 328 selfloop transitions, 122 changer transitions 0/452 dead transitions. [2024-06-21 19:20:05,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 452 transitions, 6100 flow [2024-06-21 19:20:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:20:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:20:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 150 transitions. [2024-06-21 19:20:05,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37220843672456577 [2024-06-21 19:20:05,140 INFO L175 Difference]: Start difference. First operand has 444 places, 426 transitions, 5011 flow. Second operand 13 states and 150 transitions. [2024-06-21 19:20:05,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 452 transitions, 6100 flow [2024-06-21 19:20:06,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 452 transitions, 5950 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:06,044 INFO L231 Difference]: Finished difference. Result has 448 places, 437 transitions, 5272 flow [2024-06-21 19:20:06,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4861, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5272, PETRI_PLACES=448, PETRI_TRANSITIONS=437} [2024-06-21 19:20:06,044 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 418 predicate places. [2024-06-21 19:20:06,044 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 437 transitions, 5272 flow [2024-06-21 19:20:06,045 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 19:20:06,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:06,045 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 19:20:06,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 19:20:06,045 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 19:20:06,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1900518100, now seen corresponding path program 32 times [2024-06-21 19:20:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:06,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173122138] [2024-06-21 19:20:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:06,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:07,715 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 19:20:07,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:07,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173122138] [2024-06-21 19:20:07,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173122138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:07,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:07,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:07,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545706970] [2024-06-21 19:20:07,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:07,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:07,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:07,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:20:07,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 437 transitions, 5272 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:07,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:07,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:20:07,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:08,571 INFO L124 PetriNetUnfolderBase]: 1030/1864 cut-off events. [2024-06-21 19:20:08,571 INFO L125 PetriNetUnfolderBase]: For 235166/235166 co-relation queries the response was YES. [2024-06-21 19:20:08,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13457 conditions, 1864 events. 1030/1864 cut-off events. For 235166/235166 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 11308 event pairs, 97 based on Foata normal form. 2/1864 useless extension candidates. Maximal degree in co-relation 13269. Up to 1521 conditions per place. [2024-06-21 19:20:08,591 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 343 selfloop transitions, 113 changer transitions 0/458 dead transitions. [2024-06-21 19:20:08,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 458 transitions, 6659 flow [2024-06-21 19:20:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:20:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:20:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-21 19:20:08,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2024-06-21 19:20:08,592 INFO L175 Difference]: Start difference. First operand has 448 places, 437 transitions, 5272 flow. Second operand 10 states and 142 transitions. [2024-06-21 19:20:08,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 458 transitions, 6659 flow [2024-06-21 19:20:09,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 458 transitions, 6451 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 19:20:09,543 INFO L231 Difference]: Finished difference. Result has 453 places, 441 transitions, 5451 flow [2024-06-21 19:20:09,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5451, PETRI_PLACES=453, PETRI_TRANSITIONS=441} [2024-06-21 19:20:09,543 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 423 predicate places. [2024-06-21 19:20:09,543 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 441 transitions, 5451 flow [2024-06-21 19:20:09,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:09,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:09,544 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 19:20:09,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 19:20:09,544 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 19:20:09,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1907020288, now seen corresponding path program 8 times [2024-06-21 19:20:09,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:09,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020138495] [2024-06-21 19:20:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:09,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:11,680 INFO 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 19:20:11,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:11,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020138495] [2024-06-21 19:20:11,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020138495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:11,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:11,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:11,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082249704] [2024-06-21 19:20:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:11,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:11,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:11,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:11,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 441 transitions, 5451 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 19:20:11,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:11,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:11,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:12,690 INFO L124 PetriNetUnfolderBase]: 1031/1868 cut-off events. [2024-06-21 19:20:12,690 INFO L125 PetriNetUnfolderBase]: For 238574/238574 co-relation queries the response was YES. [2024-06-21 19:20:12,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13161 conditions, 1868 events. 1031/1868 cut-off events. For 238574/238574 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 11365 event pairs, 105 based on Foata normal form. 4/1870 useless extension candidates. Maximal degree in co-relation 12972. Up to 1550 conditions per place. [2024-06-21 19:20:12,721 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 361 selfloop transitions, 93 changer transitions 0/456 dead transitions. [2024-06-21 19:20:12,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 456 transitions, 6405 flow [2024-06-21 19:20:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:20:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:20:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 19:20:12,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 19:20:12,722 INFO L175 Difference]: Start difference. First operand has 453 places, 441 transitions, 5451 flow. Second operand 11 states and 140 transitions. [2024-06-21 19:20:12,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 456 transitions, 6405 flow [2024-06-21 19:20:14,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 456 transitions, 6134 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 19:20:14,049 INFO L231 Difference]: Finished difference. Result has 456 places, 442 transitions, 5385 flow [2024-06-21 19:20:14,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5180, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5385, PETRI_PLACES=456, PETRI_TRANSITIONS=442} [2024-06-21 19:20:14,050 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 426 predicate places. [2024-06-21 19:20:14,050 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 442 transitions, 5385 flow [2024-06-21 19:20:14,050 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 19:20:14,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:14,050 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 19:20:14,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 19:20:14,050 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 19:20:14,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:14,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1150984758, now seen corresponding path program 33 times [2024-06-21 19:20:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:14,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434368971] [2024-06-21 19:20:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:14,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:15,856 INFO 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 19:20:15,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:15,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434368971] [2024-06-21 19:20:15,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434368971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:15,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:15,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:15,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371783011] [2024-06-21 19:20:15,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:15,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:15,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:15,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:15,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:15,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:20:15,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 442 transitions, 5385 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:15,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:15,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:20:15,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:16,662 INFO L124 PetriNetUnfolderBase]: 1037/1877 cut-off events. [2024-06-21 19:20:16,662 INFO L125 PetriNetUnfolderBase]: For 219543/219543 co-relation queries the response was YES. [2024-06-21 19:20:16,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13176 conditions, 1877 events. 1037/1877 cut-off events. For 219543/219543 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 11434 event pairs, 96 based on Foata normal form. 2/1877 useless extension candidates. Maximal degree in co-relation 12987. Up to 1510 conditions per place. [2024-06-21 19:20:16,689 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 338 selfloop transitions, 121 changer transitions 0/461 dead transitions. [2024-06-21 19:20:16,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 461 transitions, 6716 flow [2024-06-21 19:20:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:20:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:20:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-21 19:20:16,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4483870967741935 [2024-06-21 19:20:16,690 INFO L175 Difference]: Start difference. First operand has 456 places, 442 transitions, 5385 flow. Second operand 10 states and 139 transitions. [2024-06-21 19:20:16,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 461 transitions, 6716 flow [2024-06-21 19:20:17,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 461 transitions, 6487 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:17,797 INFO L231 Difference]: Finished difference. Result has 457 places, 444 transitions, 5481 flow [2024-06-21 19:20:17,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5481, PETRI_PLACES=457, PETRI_TRANSITIONS=444} [2024-06-21 19:20:17,797 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 427 predicate places. [2024-06-21 19:20:17,797 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 444 transitions, 5481 flow [2024-06-21 19:20:17,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:17,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:17,798 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 19:20:17,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 19:20:17,798 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 19:20:17,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1906780720, now seen corresponding path program 34 times [2024-06-21 19:20:17,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:17,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420543212] [2024-06-21 19:20:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:17,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:19,372 INFO 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 19:20:19,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:19,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420543212] [2024-06-21 19:20:19,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420543212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:19,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:19,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:19,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739616177] [2024-06-21 19:20:19,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:19,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:19,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:19,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:19,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 444 transitions, 5481 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 19:20:19,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:19,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:19,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:20,316 INFO L124 PetriNetUnfolderBase]: 1033/1871 cut-off events. [2024-06-21 19:20:20,317 INFO L125 PetriNetUnfolderBase]: For 202494/202494 co-relation queries the response was YES. [2024-06-21 19:20:20,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12850 conditions, 1871 events. 1033/1871 cut-off events. For 202494/202494 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 11380 event pairs, 94 based on Foata normal form. 2/1871 useless extension candidates. Maximal degree in co-relation 12660. Up to 1550 conditions per place. [2024-06-21 19:20:20,343 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 340 selfloop transitions, 120 changer transitions 0/462 dead transitions. [2024-06-21 19:20:20,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 462 transitions, 6460 flow [2024-06-21 19:20:20,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:20:20,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:20:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 160 transitions. [2024-06-21 19:20:20,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-21 19:20:20,344 INFO L175 Difference]: Start difference. First operand has 457 places, 444 transitions, 5481 flow. Second operand 14 states and 160 transitions. [2024-06-21 19:20:20,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 462 transitions, 6460 flow [2024-06-21 19:20:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 462 transitions, 6016 flow, removed 49 selfloop flow, removed 11 redundant places. [2024-06-21 19:20:21,124 INFO L231 Difference]: Finished difference. Result has 460 places, 446 transitions, 5304 flow [2024-06-21 19:20:21,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5037, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5304, PETRI_PLACES=460, PETRI_TRANSITIONS=446} [2024-06-21 19:20:21,124 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 430 predicate places. [2024-06-21 19:20:21,124 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 446 transitions, 5304 flow [2024-06-21 19:20:21,124 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 19:20:21,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:21,124 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 19:20:21,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 19:20:21,125 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 19:20:21,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1103577584, now seen corresponding path program 35 times [2024-06-21 19:20:21,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:21,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973484611] [2024-06-21 19:20:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:21,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:22,877 INFO 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 19:20:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:22,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973484611] [2024-06-21 19:20:22,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973484611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:22,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:22,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885295276] [2024-06-21 19:20:22,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:22,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:22,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:22,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:20:22,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 446 transitions, 5304 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:22,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:22,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:20:22,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:23,764 INFO L124 PetriNetUnfolderBase]: 1029/1865 cut-off events. [2024-06-21 19:20:23,764 INFO L125 PetriNetUnfolderBase]: For 180566/180566 co-relation queries the response was YES. [2024-06-21 19:20:23,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12269 conditions, 1865 events. 1029/1865 cut-off events. For 180566/180566 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 11360 event pairs, 95 based on Foata normal form. 2/1865 useless extension candidates. Maximal degree in co-relation 12081. Up to 1448 conditions per place. [2024-06-21 19:20:23,783 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 323 selfloop transitions, 137 changer transitions 0/462 dead transitions. [2024-06-21 19:20:23,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 462 transitions, 6556 flow [2024-06-21 19:20:23,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:20:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:20:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-21 19:20:23,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45483870967741935 [2024-06-21 19:20:23,784 INFO L175 Difference]: Start difference. First operand has 460 places, 446 transitions, 5304 flow. Second operand 10 states and 141 transitions. [2024-06-21 19:20:23,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 462 transitions, 6556 flow [2024-06-21 19:20:24,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 462 transitions, 6323 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 19:20:24,646 INFO L231 Difference]: Finished difference. Result has 460 places, 446 transitions, 5354 flow [2024-06-21 19:20:24,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5071, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5354, PETRI_PLACES=460, PETRI_TRANSITIONS=446} [2024-06-21 19:20:24,646 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 430 predicate places. [2024-06-21 19:20:24,646 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 446 transitions, 5354 flow [2024-06-21 19:20:24,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:24,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:24,646 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 19:20:24,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 19:20:24,647 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 19:20:24,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:24,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1900524610, now seen corresponding path program 36 times [2024-06-21 19:20:24,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:24,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471881589] [2024-06-21 19:20:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:26,282 INFO 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 19:20:26,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:26,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471881589] [2024-06-21 19:20:26,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471881589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:26,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:26,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:26,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576831590] [2024-06-21 19:20:26,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:26,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:26,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:26,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:26,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 446 transitions, 5354 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 19:20:26,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:26,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:26,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:27,191 INFO L124 PetriNetUnfolderBase]: 1025/1859 cut-off events. [2024-06-21 19:20:27,191 INFO L125 PetriNetUnfolderBase]: For 163630/163630 co-relation queries the response was YES. [2024-06-21 19:20:27,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11970 conditions, 1859 events. 1025/1859 cut-off events. For 163630/163630 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 11347 event pairs, 92 based on Foata normal form. 2/1859 useless extension candidates. Maximal degree in co-relation 11781. Up to 1546 conditions per place. [2024-06-21 19:20:27,216 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 344 selfloop transitions, 116 changer transitions 0/462 dead transitions. [2024-06-21 19:20:27,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 462 transitions, 6316 flow [2024-06-21 19:20:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:20:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:20:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 161 transitions. [2024-06-21 19:20:27,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:20:27,217 INFO L175 Difference]: Start difference. First operand has 460 places, 446 transitions, 5354 flow. Second operand 14 states and 161 transitions. [2024-06-21 19:20:27,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 462 transitions, 6316 flow [2024-06-21 19:20:27,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 462 transitions, 5709 flow, removed 50 selfloop flow, removed 11 redundant places. [2024-06-21 19:20:27,878 INFO L231 Difference]: Finished difference. Result has 463 places, 446 transitions, 4985 flow [2024-06-21 19:20:27,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4985, PETRI_PLACES=463, PETRI_TRANSITIONS=446} [2024-06-21 19:20:27,879 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 433 predicate places. [2024-06-21 19:20:27,879 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 446 transitions, 4985 flow [2024-06-21 19:20:27,879 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 19:20:27,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:27,879 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 19:20:27,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 19:20:27,879 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 19:20:27,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1900344934, now seen corresponding path program 44 times [2024-06-21 19:20:27,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:27,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518587171] [2024-06-21 19:20:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:27,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:29,294 INFO 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 19:20:29,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:29,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518587171] [2024-06-21 19:20:29,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518587171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:29,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:29,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:20:29,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922728652] [2024-06-21 19:20:29,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:20:29,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:29,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:20:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:20:29,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:20:29,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 446 transitions, 4985 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:29,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:29,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:20:29,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:30,013 INFO L124 PetriNetUnfolderBase]: 1029/1867 cut-off events. [2024-06-21 19:20:30,013 INFO L125 PetriNetUnfolderBase]: For 161922/161922 co-relation queries the response was YES. [2024-06-21 19:20:30,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11592 conditions, 1867 events. 1029/1867 cut-off events. For 161922/161922 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 11403 event pairs, 93 based on Foata normal form. 2/1867 useless extension candidates. Maximal degree in co-relation 11404. Up to 1675 conditions per place. [2024-06-21 19:20:30,047 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 382 selfloop transitions, 75 changer transitions 0/459 dead transitions. [2024-06-21 19:20:30,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 459 transitions, 5950 flow [2024-06-21 19:20:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:20:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:20:30,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 19:20:30,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 19:20:30,048 INFO L175 Difference]: Start difference. First operand has 463 places, 446 transitions, 4985 flow. Second operand 10 states and 129 transitions. [2024-06-21 19:20:30,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 459 transitions, 5950 flow [2024-06-21 19:20:30,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 459 transitions, 5653 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 19:20:30,722 INFO L231 Difference]: Finished difference. Result has 462 places, 447 transitions, 4869 flow [2024-06-21 19:20:30,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4688, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4869, PETRI_PLACES=462, PETRI_TRANSITIONS=447} [2024-06-21 19:20:30,723 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 432 predicate places. [2024-06-21 19:20:30,723 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 447 transitions, 4869 flow [2024-06-21 19:20:30,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:30,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:30,723 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 19:20:30,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 19:20:30,723 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 19:20:30,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:30,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1900340284, now seen corresponding path program 45 times [2024-06-21 19:20:30,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:30,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733587498] [2024-06-21 19:20:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:32,175 INFO 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 19:20:32,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:32,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733587498] [2024-06-21 19:20:32,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733587498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:32,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:32,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:20:32,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853627535] [2024-06-21 19:20:32,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:32,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:20:32,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:20:32,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:20:32,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:20:32,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 447 transitions, 4869 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:32,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:32,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:20:32,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:32,854 INFO L124 PetriNetUnfolderBase]: 1026/1862 cut-off events. [2024-06-21 19:20:32,854 INFO L125 PetriNetUnfolderBase]: For 143977/143977 co-relation queries the response was YES. [2024-06-21 19:20:32,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11030 conditions, 1862 events. 1026/1862 cut-off events. For 143977/143977 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 11359 event pairs, 88 based on Foata normal form. 2/1862 useless extension candidates. Maximal degree in co-relation 10842. Up to 1618 conditions per place. [2024-06-21 19:20:32,878 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 377 selfloop transitions, 81 changer transitions 0/460 dead transitions. [2024-06-21 19:20:32,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 460 transitions, 5815 flow [2024-06-21 19:20:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:20:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:20:32,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 19:20:32,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:20:32,879 INFO L175 Difference]: Start difference. First operand has 462 places, 447 transitions, 4869 flow. Second operand 10 states and 130 transitions. [2024-06-21 19:20:32,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 460 transitions, 5815 flow [2024-06-21 19:20:33,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 460 transitions, 5639 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:33,511 INFO L231 Difference]: Finished difference. Result has 463 places, 447 transitions, 4861 flow [2024-06-21 19:20:33,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4861, PETRI_PLACES=463, PETRI_TRANSITIONS=447} [2024-06-21 19:20:33,512 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 433 predicate places. [2024-06-21 19:20:33,512 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 447 transitions, 4861 flow [2024-06-21 19:20:33,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:33,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:33,512 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 19:20:33,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 19:20:33,512 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 19:20:33,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:33,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1536543890, now seen corresponding path program 1 times [2024-06-21 19:20:33,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:33,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033115555] [2024-06-21 19:20:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:35,174 INFO 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 19:20:35,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:35,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033115555] [2024-06-21 19:20:35,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033115555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:35,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:35,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:20:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165837169] [2024-06-21 19:20:35,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:35,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:20:35,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:20:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:20:35,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:35,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 447 transitions, 4861 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 19:20:35,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:35,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:35,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:35,990 INFO L124 PetriNetUnfolderBase]: 1067/1950 cut-off events. [2024-06-21 19:20:35,990 INFO L125 PetriNetUnfolderBase]: For 303298/303298 co-relation queries the response was YES. [2024-06-21 19:20:36,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12769 conditions, 1950 events. 1067/1950 cut-off events. For 303298/303298 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 11937 event pairs, 255 based on Foata normal form. 8/1956 useless extension candidates. Maximal degree in co-relation 12581. Up to 895 conditions per place. [2024-06-21 19:20:36,024 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 315 selfloop transitions, 141 changer transitions 16/474 dead transitions. [2024-06-21 19:20:36,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 474 transitions, 6219 flow [2024-06-21 19:20:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:20:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:20:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 19:20:36,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 19:20:36,025 INFO L175 Difference]: Start difference. First operand has 463 places, 447 transitions, 4861 flow. Second operand 12 states and 150 transitions. [2024-06-21 19:20:36,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 474 transitions, 6219 flow [2024-06-21 19:20:37,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 474 transitions, 5752 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 19:20:37,014 INFO L231 Difference]: Finished difference. Result has 462 places, 443 transitions, 4650 flow [2024-06-21 19:20:37,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4650, PETRI_PLACES=462, PETRI_TRANSITIONS=443} [2024-06-21 19:20:37,015 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 432 predicate places. [2024-06-21 19:20:37,015 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 443 transitions, 4650 flow [2024-06-21 19:20:37,015 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 19:20:37,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:37,015 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 19:20:37,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 19:20:37,015 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 19:20:37,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash -953832806, now seen corresponding path program 2 times [2024-06-21 19:20:37,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:37,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353223924] [2024-06-21 19:20:37,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:37,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:39,437 INFO 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 19:20:39,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:39,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353223924] [2024-06-21 19:20:39,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353223924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:39,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:39,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:39,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390209923] [2024-06-21 19:20:39,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:39,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:39,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:39,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:39,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 443 transitions, 4650 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:39,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:39,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:39,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:40,598 INFO L124 PetriNetUnfolderBase]: 1055/1930 cut-off events. [2024-06-21 19:20:40,598 INFO L125 PetriNetUnfolderBase]: For 323419/323419 co-relation queries the response was YES. [2024-06-21 19:20:40,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12336 conditions, 1930 events. 1055/1930 cut-off events. For 323419/323419 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 11785 event pairs, 262 based on Foata normal form. 10/1938 useless extension candidates. Maximal degree in co-relation 12150. Up to 1420 conditions per place. [2024-06-21 19:20:40,623 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 300 selfloop transitions, 142 changer transitions 23/467 dead transitions. [2024-06-21 19:20:40,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 467 transitions, 5690 flow [2024-06-21 19:20:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-21 19:20:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-21 19:20:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 184 transitions. [2024-06-21 19:20:40,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:20:40,624 INFO L175 Difference]: Start difference. First operand has 462 places, 443 transitions, 4650 flow. Second operand 16 states and 184 transitions. [2024-06-21 19:20:40,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 467 transitions, 5690 flow [2024-06-21 19:20:41,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 467 transitions, 5483 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:20:41,556 INFO L231 Difference]: Finished difference. Result has 464 places, 426 transitions, 4584 flow [2024-06-21 19:20:41,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4443, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4584, PETRI_PLACES=464, PETRI_TRANSITIONS=426} [2024-06-21 19:20:41,556 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 434 predicate places. [2024-06-21 19:20:41,556 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 426 transitions, 4584 flow [2024-06-21 19:20:41,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:41,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:41,557 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 19:20:41,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 19:20:41,557 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 19:20:41,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:41,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1264242822, now seen corresponding path program 3 times [2024-06-21 19:20:41,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:41,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121466393] [2024-06-21 19:20:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:43,186 INFO 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 19:20:43,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:43,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121466393] [2024-06-21 19:20:43,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121466393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:43,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:43,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:43,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717852614] [2024-06-21 19:20:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:43,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:43,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 426 transitions, 4584 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:43,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:43,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:43,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:43,935 INFO L124 PetriNetUnfolderBase]: 1019/1874 cut-off events. [2024-06-21 19:20:43,935 INFO L125 PetriNetUnfolderBase]: For 302529/302529 co-relation queries the response was YES. [2024-06-21 19:20:43,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12225 conditions, 1874 events. 1019/1874 cut-off events. For 302529/302529 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 11425 event pairs, 260 based on Foata normal form. 8/1880 useless extension candidates. Maximal degree in co-relation 12039. Up to 1422 conditions per place. [2024-06-21 19:20:43,959 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 306 selfloop transitions, 125 changer transitions 11/444 dead transitions. [2024-06-21 19:20:43,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 444 transitions, 5542 flow [2024-06-21 19:20:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:20:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:20:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 19:20:43,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 19:20:43,960 INFO L175 Difference]: Start difference. First operand has 464 places, 426 transitions, 4584 flow. Second operand 12 states and 139 transitions. [2024-06-21 19:20:43,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 444 transitions, 5542 flow [2024-06-21 19:20:44,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 444 transitions, 5221 flow, removed 9 selfloop flow, removed 17 redundant places. [2024-06-21 19:20:44,854 INFO L231 Difference]: Finished difference. Result has 453 places, 423 transitions, 4490 flow [2024-06-21 19:20:44,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4263, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4490, PETRI_PLACES=453, PETRI_TRANSITIONS=423} [2024-06-21 19:20:44,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 423 predicate places. [2024-06-21 19:20:44,854 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 423 transitions, 4490 flow [2024-06-21 19:20:44,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:44,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:44,854 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 19:20:44,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 19:20:44,854 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 19:20:44,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:44,855 INFO L85 PathProgramCache]: Analyzing trace with hash -953982536, now seen corresponding path program 4 times [2024-06-21 19:20:44,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:44,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997193079] [2024-06-21 19:20:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:44,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:46,588 INFO 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 19:20:46,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:46,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997193079] [2024-06-21 19:20:46,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997193079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:46,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:46,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:46,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977751176] [2024-06-21 19:20:46,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:46,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:46,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:46,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:46,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:46,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:46,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 423 transitions, 4490 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:46,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:46,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:46,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:47,446 INFO L124 PetriNetUnfolderBase]: 1049/1940 cut-off events. [2024-06-21 19:20:47,446 INFO L125 PetriNetUnfolderBase]: For 441221/441221 co-relation queries the response was YES. [2024-06-21 19:20:47,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14330 conditions, 1940 events. 1049/1940 cut-off events. For 441221/441221 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 11843 event pairs, 287 based on Foata normal form. 8/1946 useless extension candidates. Maximal degree in co-relation 14145. Up to 1322 conditions per place. [2024-06-21 19:20:47,468 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 304 selfloop transitions, 127 changer transitions 17/450 dead transitions. [2024-06-21 19:20:47,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 450 transitions, 5806 flow [2024-06-21 19:20:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:20:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:20:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-06-21 19:20:47,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143920595533499 [2024-06-21 19:20:47,469 INFO L175 Difference]: Start difference. First operand has 453 places, 423 transitions, 4490 flow. Second operand 13 states and 167 transitions. [2024-06-21 19:20:47,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 450 transitions, 5806 flow [2024-06-21 19:20:48,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 450 transitions, 5546 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:48,725 INFO L231 Difference]: Finished difference. Result has 452 places, 413 transitions, 4402 flow [2024-06-21 19:20:48,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4232, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4402, PETRI_PLACES=452, PETRI_TRANSITIONS=413} [2024-06-21 19:20:48,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 422 predicate places. [2024-06-21 19:20:48,725 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 413 transitions, 4402 flow [2024-06-21 19:20:48,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:48,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:48,726 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 19:20:48,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 19:20:48,726 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 19:20:48,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1784398264, now seen corresponding path program 5 times [2024-06-21 19:20:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:48,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572348859] [2024-06-21 19:20:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:48,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:50,432 INFO 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 19:20:50,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:50,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572348859] [2024-06-21 19:20:50,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572348859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:50,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:50,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:20:50,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975994120] [2024-06-21 19:20:50,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:50,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:20:50,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:50,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:20:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:20:50,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:50,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 413 transitions, 4402 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 19:20:50,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:50,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:50,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:51,231 INFO L124 PetriNetUnfolderBase]: 1018/1883 cut-off events. [2024-06-21 19:20:51,232 INFO L125 PetriNetUnfolderBase]: For 441131/441131 co-relation queries the response was YES. [2024-06-21 19:20:51,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14098 conditions, 1883 events. 1018/1883 cut-off events. For 441131/441131 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 11383 event pairs, 283 based on Foata normal form. 8/1889 useless extension candidates. Maximal degree in co-relation 13913. Up to 1587 conditions per place. [2024-06-21 19:20:51,257 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 328 selfloop transitions, 84 changer transitions 18/432 dead transitions. [2024-06-21 19:20:51,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 432 transitions, 5332 flow [2024-06-21 19:20:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:20:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:20:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 19:20:51,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:20:51,258 INFO L175 Difference]: Start difference. First operand has 452 places, 413 transitions, 4402 flow. Second operand 12 states and 138 transitions. [2024-06-21 19:20:51,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 432 transitions, 5332 flow [2024-06-21 19:20:52,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 432 transitions, 5159 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 19:20:52,424 INFO L231 Difference]: Finished difference. Result has 445 places, 408 transitions, 4348 flow [2024-06-21 19:20:52,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4348, PETRI_PLACES=445, PETRI_TRANSITIONS=408} [2024-06-21 19:20:52,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 415 predicate places. [2024-06-21 19:20:52,424 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 408 transitions, 4348 flow [2024-06-21 19:20:52,425 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 19:20:52,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:52,425 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 19:20:52,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 19:20:52,425 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 19:20:52,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash 896502930, now seen corresponding path program 6 times [2024-06-21 19:20:52,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:52,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733673248] [2024-06-21 19:20:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:52,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:54,026 INFO 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 19:20:54,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:54,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733673248] [2024-06-21 19:20:54,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733673248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:54,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:54,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:20:54,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669860711] [2024-06-21 19:20:54,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:20:54,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:20:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:20:54,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:54,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 408 transitions, 4348 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 19:20:54,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:54,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:54,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:54,820 INFO L124 PetriNetUnfolderBase]: 966/1775 cut-off events. [2024-06-21 19:20:54,820 INFO L125 PetriNetUnfolderBase]: For 302863/302863 co-relation queries the response was YES. [2024-06-21 19:20:54,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11633 conditions, 1775 events. 966/1775 cut-off events. For 302863/302863 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 10632 event pairs, 251 based on Foata normal form. 8/1781 useless extension candidates. Maximal degree in co-relation 11448. Up to 1614 conditions per place. [2024-06-21 19:20:54,843 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 366 selfloop transitions, 45 changer transitions 11/424 dead transitions. [2024-06-21 19:20:54,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 424 transitions, 5254 flow [2024-06-21 19:20:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:20:54,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:20:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 19:20:54,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 19:20:54,843 INFO L175 Difference]: Start difference. First operand has 445 places, 408 transitions, 4348 flow. Second operand 12 states and 137 transitions. [2024-06-21 19:20:54,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 424 transitions, 5254 flow [2024-06-21 19:20:55,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 424 transitions, 5074 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 19:20:55,660 INFO L231 Difference]: Finished difference. Result has 441 places, 405 transitions, 4226 flow [2024-06-21 19:20:55,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4226, PETRI_PLACES=441, PETRI_TRANSITIONS=405} [2024-06-21 19:20:55,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 411 predicate places. [2024-06-21 19:20:55,660 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 405 transitions, 4226 flow [2024-06-21 19:20:55,661 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 19:20:55,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:55,661 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 19:20:55,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 19:20:55,661 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 19:20:55,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:55,661 INFO L85 PathProgramCache]: Analyzing trace with hash -661871026, now seen corresponding path program 7 times [2024-06-21 19:20:55,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:55,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739695503] [2024-06-21 19:20:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:55,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:57,285 INFO 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 19:20:57,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:57,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739695503] [2024-06-21 19:20:57,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739695503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:57,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:57,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526527574] [2024-06-21 19:20:57,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:57,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:57,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:57,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:57,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 405 transitions, 4226 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:57,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:57,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:57,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:58,126 INFO L124 PetriNetUnfolderBase]: 959/1762 cut-off events. [2024-06-21 19:20:58,126 INFO L125 PetriNetUnfolderBase]: For 302571/302571 co-relation queries the response was YES. [2024-06-21 19:20:58,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11474 conditions, 1762 events. 959/1762 cut-off events. For 302571/302571 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 10531 event pairs, 251 based on Foata normal form. 8/1768 useless extension candidates. Maximal degree in co-relation 11289. Up to 1496 conditions per place. [2024-06-21 19:20:58,148 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 343 selfloop transitions, 64 changer transitions 13/422 dead transitions. [2024-06-21 19:20:58,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 422 transitions, 5138 flow [2024-06-21 19:20:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:20:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:20:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 19:20:58,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:20:58,149 INFO L175 Difference]: Start difference. First operand has 441 places, 405 transitions, 4226 flow. Second operand 12 states and 138 transitions. [2024-06-21 19:20:58,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 422 transitions, 5138 flow [2024-06-21 19:20:59,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 422 transitions, 5040 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:59,044 INFO L231 Difference]: Finished difference. Result has 439 places, 401 transitions, 4215 flow [2024-06-21 19:20:59,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4215, PETRI_PLACES=439, PETRI_TRANSITIONS=401} [2024-06-21 19:20:59,044 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 409 predicate places. [2024-06-21 19:20:59,044 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 401 transitions, 4215 flow [2024-06-21 19:20:59,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:59,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:59,044 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 19:20:59,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 19:20:59,045 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 19:20:59,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:59,045 INFO L85 PathProgramCache]: Analyzing trace with hash 748893330, now seen corresponding path program 8 times [2024-06-21 19:20:59,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:59,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783772588] [2024-06-21 19:20:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:59,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:00,735 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 19:21:00,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:00,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783772588] [2024-06-21 19:21:00,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783772588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:00,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:00,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:21:00,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731638182] [2024-06-21 19:21:00,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:00,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:21:00,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:00,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:21:00,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:21:00,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:00,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 401 transitions, 4215 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 19:21:00,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:00,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:00,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:01,516 INFO L124 PetriNetUnfolderBase]: 973/1792 cut-off events. [2024-06-21 19:21:01,517 INFO L125 PetriNetUnfolderBase]: For 382153/382153 co-relation queries the response was YES. [2024-06-21 19:21:01,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12726 conditions, 1792 events. 973/1792 cut-off events. For 382153/382153 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 10676 event pairs, 265 based on Foata normal form. 8/1798 useless extension candidates. Maximal degree in co-relation 12541. Up to 1553 conditions per place. [2024-06-21 19:21:01,539 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 365 selfloop transitions, 43 changer transitions 13/423 dead transitions. [2024-06-21 19:21:01,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 423 transitions, 5441 flow [2024-06-21 19:21:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 19:21:01,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:21:01,540 INFO L175 Difference]: Start difference. First operand has 439 places, 401 transitions, 4215 flow. Second operand 12 states and 144 transitions. [2024-06-21 19:21:01,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 423 transitions, 5441 flow [2024-06-21 19:21:02,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 423 transitions, 5299 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 19:21:02,578 INFO L231 Difference]: Finished difference. Result has 436 places, 397 transitions, 4122 flow [2024-06-21 19:21:02,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4122, PETRI_PLACES=436, PETRI_TRANSITIONS=397} [2024-06-21 19:21:02,578 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 406 predicate places. [2024-06-21 19:21:02,578 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 397 transitions, 4122 flow [2024-06-21 19:21:02,578 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 19:21:02,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:02,578 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 19:21:02,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-21 19:21:02,579 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 19:21:02,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:02,579 INFO L85 PathProgramCache]: Analyzing trace with hash 752612400, now seen corresponding path program 9 times [2024-06-21 19:21:02,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:02,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844855113] [2024-06-21 19:21:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:02,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:04,183 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 19:21:04,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:04,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844855113] [2024-06-21 19:21:04,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844855113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:04,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:04,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:04,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169685378] [2024-06-21 19:21:04,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:04,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:04,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:04,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:04,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:04,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 397 transitions, 4122 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:04,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:04,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:04,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:04,785 INFO L124 PetriNetUnfolderBase]: 937/1720 cut-off events. [2024-06-21 19:21:04,785 INFO L125 PetriNetUnfolderBase]: For 302509/302509 co-relation queries the response was YES. [2024-06-21 19:21:04,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11252 conditions, 1720 events. 937/1720 cut-off events. For 302509/302509 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 10194 event pairs, 247 based on Foata normal form. 8/1726 useless extension candidates. Maximal degree in co-relation 11067. Up to 1451 conditions per place. [2024-06-21 19:21:04,806 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 335 selfloop transitions, 62 changer transitions 15/414 dead transitions. [2024-06-21 19:21:04,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 414 transitions, 5018 flow [2024-06-21 19:21:04,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 19:21:04,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 19:21:04,807 INFO L175 Difference]: Start difference. First operand has 436 places, 397 transitions, 4122 flow. Second operand 12 states and 137 transitions. [2024-06-21 19:21:04,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 414 transitions, 5018 flow [2024-06-21 19:21:05,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 414 transitions, 4906 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 19:21:05,559 INFO L231 Difference]: Finished difference. Result has 432 places, 392 transitions, 4077 flow [2024-06-21 19:21:05,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4077, PETRI_PLACES=432, PETRI_TRANSITIONS=392} [2024-06-21 19:21:05,560 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 402 predicate places. [2024-06-21 19:21:05,560 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 392 transitions, 4077 flow [2024-06-21 19:21:05,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:05,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:05,560 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 19:21:05,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-21 19:21:05,560 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 19:21:05,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash -585698000, now seen corresponding path program 10 times [2024-06-21 19:21:05,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:05,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342801744] [2024-06-21 19:21:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:07,253 INFO 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 19:21:07,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:07,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342801744] [2024-06-21 19:21:07,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342801744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:07,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:07,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:21:07,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713754542] [2024-06-21 19:21:07,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:07,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:21:07,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:07,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:21:07,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:21:07,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:07,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 392 transitions, 4077 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 19:21:07,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:07,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:07,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:08,098 INFO L124 PetriNetUnfolderBase]: 957/1760 cut-off events. [2024-06-21 19:21:08,098 INFO L125 PetriNetUnfolderBase]: For 402030/402030 co-relation queries the response was YES. [2024-06-21 19:21:08,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12790 conditions, 1760 events. 957/1760 cut-off events. For 402030/402030 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 10423 event pairs, 254 based on Foata normal form. 8/1766 useless extension candidates. Maximal degree in co-relation 12606. Up to 1168 conditions per place. [2024-06-21 19:21:08,121 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 306 selfloop transitions, 95 changer transitions 15/418 dead transitions. [2024-06-21 19:21:08,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 418 transitions, 5317 flow [2024-06-21 19:21:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-06-21 19:21:08,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-21 19:21:08,133 INFO L175 Difference]: Start difference. First operand has 432 places, 392 transitions, 4077 flow. Second operand 12 states and 153 transitions. [2024-06-21 19:21:08,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 418 transitions, 5317 flow [2024-06-21 19:21:09,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 418 transitions, 5111 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 19:21:09,293 INFO L231 Difference]: Finished difference. Result has 424 places, 388 transitions, 4031 flow [2024-06-21 19:21:09,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3877, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4031, PETRI_PLACES=424, PETRI_TRANSITIONS=388} [2024-06-21 19:21:09,293 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 394 predicate places. [2024-06-21 19:21:09,294 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 388 transitions, 4031 flow [2024-06-21 19:21:09,294 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 19:21:09,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:09,294 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 19:21:09,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-21 19:21:09,294 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 19:21:09,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash -581973350, now seen corresponding path program 11 times [2024-06-21 19:21:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:09,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967802301] [2024-06-21 19:21:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:09,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:10,962 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 19:21:10,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:10,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967802301] [2024-06-21 19:21:10,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967802301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:10,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:10,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:10,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928994393] [2024-06-21 19:21:10,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:10,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:10,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:11,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:11,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 388 transitions, 4031 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:11,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:11,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:11,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:11,734 INFO L124 PetriNetUnfolderBase]: 943/1732 cut-off events. [2024-06-21 19:21:11,734 INFO L125 PetriNetUnfolderBase]: For 421907/421907 co-relation queries the response was YES. [2024-06-21 19:21:11,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12540 conditions, 1732 events. 943/1732 cut-off events. For 421907/421907 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 10212 event pairs, 266 based on Foata normal form. 10/1740 useless extension candidates. Maximal degree in co-relation 12358. Up to 1484 conditions per place. [2024-06-21 19:21:11,756 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 314 selfloop transitions, 77 changer transitions 14/407 dead transitions. [2024-06-21 19:21:11,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 407 transitions, 4921 flow [2024-06-21 19:21:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 19:21:11,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-21 19:21:11,756 INFO L175 Difference]: Start difference. First operand has 424 places, 388 transitions, 4031 flow. Second operand 12 states and 149 transitions. [2024-06-21 19:21:11,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 407 transitions, 4921 flow [2024-06-21 19:21:12,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 407 transitions, 4767 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:12,894 INFO L231 Difference]: Finished difference. Result has 421 places, 383 transitions, 3987 flow [2024-06-21 19:21:12,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3877, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3987, PETRI_PLACES=421, PETRI_TRANSITIONS=383} [2024-06-21 19:21:12,894 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 391 predicate places. [2024-06-21 19:21:12,894 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 383 transitions, 3987 flow [2024-06-21 19:21:12,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:12,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:12,895 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 19:21:12,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-21 19:21:12,895 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:12,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:12,896 INFO L85 PathProgramCache]: Analyzing trace with hash -581978930, now seen corresponding path program 12 times [2024-06-21 19:21:12,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:12,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606607274] [2024-06-21 19:21:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:14,498 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 19:21:14,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:14,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606607274] [2024-06-21 19:21:14,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606607274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:14,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:14,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:14,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716506438] [2024-06-21 19:21:14,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:14,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:14,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:14,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:14,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:14,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:14,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 383 transitions, 3987 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:14,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:14,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:14,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:15,155 INFO L124 PetriNetUnfolderBase]: 931/1712 cut-off events. [2024-06-21 19:21:15,155 INFO L125 PetriNetUnfolderBase]: For 401484/401484 co-relation queries the response was YES. [2024-06-21 19:21:15,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12487 conditions, 1712 events. 931/1712 cut-off events. For 401484/401484 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 10060 event pairs, 256 based on Foata normal form. 8/1718 useless extension candidates. Maximal degree in co-relation 12306. Up to 1281 conditions per place. [2024-06-21 19:21:15,176 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 252 selfloop transitions, 136 changer transitions 12/402 dead transitions. [2024-06-21 19:21:15,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 402 transitions, 4861 flow [2024-06-21 19:21:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:15,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 19:21:15,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:21:15,177 INFO L175 Difference]: Start difference. First operand has 421 places, 383 transitions, 3987 flow. Second operand 12 states and 144 transitions. [2024-06-21 19:21:15,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 402 transitions, 4861 flow [2024-06-21 19:21:16,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 402 transitions, 4701 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:16,223 INFO L231 Difference]: Finished difference. Result has 419 places, 380 transitions, 4073 flow [2024-06-21 19:21:16,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3827, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4073, PETRI_PLACES=419, PETRI_TRANSITIONS=380} [2024-06-21 19:21:16,223 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 389 predicate places. [2024-06-21 19:21:16,223 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 380 transitions, 4073 flow [2024-06-21 19:21:16,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:16,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:16,223 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 19:21:16,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-21 19:21:16,223 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:16,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:16,224 INFO L85 PathProgramCache]: Analyzing trace with hash -582123080, now seen corresponding path program 13 times [2024-06-21 19:21:16,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:16,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55066499] [2024-06-21 19:21:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:16,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:17,877 INFO 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 19:21:17,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:17,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55066499] [2024-06-21 19:21:17,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55066499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:17,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:17,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:21:17,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375258811] [2024-06-21 19:21:17,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:17,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:21:17,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:17,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:21:17,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:21:18,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:18,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 380 transitions, 4073 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 19:21:18,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:18,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:18,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:18,741 INFO L124 PetriNetUnfolderBase]: 924/1699 cut-off events. [2024-06-21 19:21:18,741 INFO L125 PetriNetUnfolderBase]: For 401874/401874 co-relation queries the response was YES. [2024-06-21 19:21:18,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12539 conditions, 1699 events. 924/1699 cut-off events. For 401874/401874 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 9980 event pairs, 248 based on Foata normal form. 8/1705 useless extension candidates. Maximal degree in co-relation 12358. Up to 1263 conditions per place. [2024-06-21 19:21:18,845 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 249 selfloop transitions, 133 changer transitions 16/400 dead transitions. [2024-06-21 19:21:18,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 400 transitions, 4945 flow [2024-06-21 19:21:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 19:21:18,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:21:18,846 INFO L175 Difference]: Start difference. First operand has 419 places, 380 transitions, 4073 flow. Second operand 12 states and 144 transitions. [2024-06-21 19:21:18,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 400 transitions, 4945 flow [2024-06-21 19:21:19,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 400 transitions, 4665 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:19,829 INFO L231 Difference]: Finished difference. Result has 417 places, 375 transitions, 4001 flow [2024-06-21 19:21:19,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4001, PETRI_PLACES=417, PETRI_TRANSITIONS=375} [2024-06-21 19:21:19,829 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 387 predicate places. [2024-06-21 19:21:19,829 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 375 transitions, 4001 flow [2024-06-21 19:21:19,829 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 19:21:19,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:19,829 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 19:21:19,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-21 19:21:19,830 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:19,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:19,830 INFO L85 PathProgramCache]: Analyzing trace with hash -443445200, now seen corresponding path program 14 times [2024-06-21 19:21:19,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:19,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935008325] [2024-06-21 19:21:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:21,549 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 19:21:21,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:21,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935008325] [2024-06-21 19:21:21,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935008325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:21,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:21,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:21,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320133938] [2024-06-21 19:21:21,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:21,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:21,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:21,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:21,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:21,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:21,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 375 transitions, 4001 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:21,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:21,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:21,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:22,361 INFO L124 PetriNetUnfolderBase]: 914/1678 cut-off events. [2024-06-21 19:21:22,361 INFO L125 PetriNetUnfolderBase]: For 421926/421926 co-relation queries the response was YES. [2024-06-21 19:21:22,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12402 conditions, 1678 events. 914/1678 cut-off events. For 421926/421926 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 9798 event pairs, 258 based on Foata normal form. 10/1686 useless extension candidates. Maximal degree in co-relation 12221. Up to 1495 conditions per place. [2024-06-21 19:21:22,382 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 324 selfloop transitions, 56 changer transitions 12/394 dead transitions. [2024-06-21 19:21:22,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 394 transitions, 4867 flow [2024-06-21 19:21:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 19:21:22,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924731182795699 [2024-06-21 19:21:22,383 INFO L175 Difference]: Start difference. First operand has 417 places, 375 transitions, 4001 flow. Second operand 12 states and 146 transitions. [2024-06-21 19:21:22,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 394 transitions, 4867 flow [2024-06-21 19:21:23,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 394 transitions, 4585 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:23,254 INFO L231 Difference]: Finished difference. Result has 412 places, 371 transitions, 3788 flow [2024-06-21 19:21:23,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3719, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3788, PETRI_PLACES=412, PETRI_TRANSITIONS=371} [2024-06-21 19:21:23,255 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2024-06-21 19:21:23,255 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 371 transitions, 3788 flow [2024-06-21 19:21:23,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:23,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:23,255 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 19:21:23,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-21 19:21:23,255 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:23,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash -437873074, now seen corresponding path program 1 times [2024-06-21 19:21:23,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:23,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29966401] [2024-06-21 19:21:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:23,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:25,179 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 19:21:25,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:25,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29966401] [2024-06-21 19:21:25,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29966401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:25,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:25,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035312890] [2024-06-21 19:21:25,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:25,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:25,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:25,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:25,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 371 transitions, 3788 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:25,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:25,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:25,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:25,852 INFO L124 PetriNetUnfolderBase]: 894/1638 cut-off events. [2024-06-21 19:21:25,852 INFO L125 PetriNetUnfolderBase]: For 342016/342016 co-relation queries the response was YES. [2024-06-21 19:21:25,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12036 conditions, 1638 events. 894/1638 cut-off events. For 342016/342016 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 9551 event pairs, 253 based on Foata normal form. 2/1638 useless extension candidates. Maximal degree in co-relation 11856. Up to 1419 conditions per place. [2024-06-21 19:21:25,873 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 307 selfloop transitions, 75 changer transitions 0/384 dead transitions. [2024-06-21 19:21:25,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 384 transitions, 4596 flow [2024-06-21 19:21:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:21:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:21:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 19:21:25,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 19:21:25,874 INFO L175 Difference]: Start difference. First operand has 412 places, 371 transitions, 3788 flow. Second operand 10 states and 123 transitions. [2024-06-21 19:21:25,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 384 transitions, 4596 flow [2024-06-21 19:21:26,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 384 transitions, 4478 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:21:26,766 INFO L231 Difference]: Finished difference. Result has 409 places, 372 transitions, 3840 flow [2024-06-21 19:21:26,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3840, PETRI_PLACES=409, PETRI_TRANSITIONS=372} [2024-06-21 19:21:26,766 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 379 predicate places. [2024-06-21 19:21:26,766 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 372 transitions, 3840 flow [2024-06-21 19:21:26,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:26,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:26,766 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 19:21:26,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-21 19:21:26,766 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:26,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:26,767 INFO L85 PathProgramCache]: Analyzing trace with hash 621755530, now seen corresponding path program 2 times [2024-06-21 19:21:26,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:26,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727052610] [2024-06-21 19:21:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:26,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:28,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:28,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727052610] [2024-06-21 19:21:28,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727052610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:28,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:28,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:21:28,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381987871] [2024-06-21 19:21:28,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:28,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:21:28,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:21:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:21:28,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:28,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 372 transitions, 3840 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:28,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:28,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:28,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:29,129 INFO L124 PetriNetUnfolderBase]: 898/1646 cut-off events. [2024-06-21 19:21:29,129 INFO L125 PetriNetUnfolderBase]: For 342338/342338 co-relation queries the response was YES. [2024-06-21 19:21:29,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 1646 events. 898/1646 cut-off events. For 342338/342338 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 9589 event pairs, 253 based on Foata normal form. 2/1646 useless extension candidates. Maximal degree in co-relation 11944. Up to 1427 conditions per place. [2024-06-21 19:21:29,152 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 315 selfloop transitions, 67 changer transitions 0/384 dead transitions. [2024-06-21 19:21:29,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 384 transitions, 4646 flow [2024-06-21 19:21:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:21:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:21:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 19:21:29,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 19:21:29,153 INFO L175 Difference]: Start difference. First operand has 409 places, 372 transitions, 3840 flow. Second operand 11 states and 128 transitions. [2024-06-21 19:21:29,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 384 transitions, 4646 flow [2024-06-21 19:21:30,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 384 transitions, 4485 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 19:21:30,111 INFO L231 Difference]: Finished difference. Result has 412 places, 373 transitions, 3835 flow [2024-06-21 19:21:30,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3835, PETRI_PLACES=412, PETRI_TRANSITIONS=373} [2024-06-21 19:21:30,111 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2024-06-21 19:21:30,111 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 373 transitions, 3835 flow [2024-06-21 19:21:30,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:30,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:30,112 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 19:21:30,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-21 19:21:30,112 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:30,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:30,113 INFO L85 PathProgramCache]: Analyzing trace with hash -443450780, now seen corresponding path program 15 times [2024-06-21 19:21:30,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:30,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164730966] [2024-06-21 19:21:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:30,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:31,835 INFO 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 19:21:31,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:31,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164730966] [2024-06-21 19:21:31,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164730966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:31,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:31,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:21:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056277475] [2024-06-21 19:21:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:31,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:21:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:21:31,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:21:31,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:31,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 373 transitions, 3835 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 19:21:31,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:31,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:31,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:32,630 INFO L124 PetriNetUnfolderBase]: 910/1674 cut-off events. [2024-06-21 19:21:32,630 INFO L125 PetriNetUnfolderBase]: For 406947/406947 co-relation queries the response was YES. [2024-06-21 19:21:32,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12238 conditions, 1674 events. 910/1674 cut-off events. For 406947/406947 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 9809 event pairs, 256 based on Foata normal form. 8/1680 useless extension candidates. Maximal degree in co-relation 12057. Up to 1501 conditions per place. [2024-06-21 19:21:32,651 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 324 selfloop transitions, 54 changer transitions 11/391 dead transitions. [2024-06-21 19:21:32,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 391 transitions, 4681 flow [2024-06-21 19:21:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 19:21:32,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-21 19:21:32,652 INFO L175 Difference]: Start difference. First operand has 412 places, 373 transitions, 3835 flow. Second operand 12 states and 143 transitions. [2024-06-21 19:21:32,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 391 transitions, 4681 flow [2024-06-21 19:21:33,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 391 transitions, 4560 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 19:21:33,540 INFO L231 Difference]: Finished difference. Result has 417 places, 370 transitions, 3795 flow [2024-06-21 19:21:33,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3795, PETRI_PLACES=417, PETRI_TRANSITIONS=370} [2024-06-21 19:21:33,540 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 387 predicate places. [2024-06-21 19:21:33,540 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 370 transitions, 3795 flow [2024-06-21 19:21:33,541 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 19:21:33,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:33,541 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 19:21:33,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-21 19:21:33,541 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:33,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:33,541 INFO L85 PathProgramCache]: Analyzing trace with hash -437881010, now seen corresponding path program 16 times [2024-06-21 19:21:33,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:33,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119823584] [2024-06-21 19:21:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:33,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:35,372 INFO 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 19:21:35,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:35,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119823584] [2024-06-21 19:21:35,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119823584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:35,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:35,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:21:35,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181068283] [2024-06-21 19:21:35,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:35,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:21:35,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:35,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:21:35,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:21:35,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:35,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 370 transitions, 3795 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 19:21:35,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:35,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:35,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:36,207 INFO L124 PetriNetUnfolderBase]: 907/1669 cut-off events. [2024-06-21 19:21:36,207 INFO L125 PetriNetUnfolderBase]: For 433037/433037 co-relation queries the response was YES. [2024-06-21 19:21:36,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12208 conditions, 1669 events. 907/1669 cut-off events. For 433037/433037 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 9772 event pairs, 263 based on Foata normal form. 10/1677 useless extension candidates. Maximal degree in co-relation 12026. Up to 1406 conditions per place. [2024-06-21 19:21:36,229 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 302 selfloop transitions, 72 changer transitions 12/388 dead transitions. [2024-06-21 19:21:36,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 388 transitions, 4647 flow [2024-06-21 19:21:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 19:21:36,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 19:21:36,230 INFO L175 Difference]: Start difference. First operand has 417 places, 370 transitions, 3795 flow. Second operand 12 states and 142 transitions. [2024-06-21 19:21:36,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 388 transitions, 4647 flow [2024-06-21 19:21:37,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 388 transitions, 4531 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:37,166 INFO L231 Difference]: Finished difference. Result has 415 places, 366 transitions, 3775 flow [2024-06-21 19:21:37,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3775, PETRI_PLACES=415, PETRI_TRANSITIONS=366} [2024-06-21 19:21:37,167 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 385 predicate places. [2024-06-21 19:21:37,167 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 366 transitions, 3775 flow [2024-06-21 19:21:37,167 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 19:21:37,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:37,167 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 19:21:37,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-21 19:21:37,167 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:37,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash -438088400, now seen corresponding path program 17 times [2024-06-21 19:21:37,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:37,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207383247] [2024-06-21 19:21:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:37,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:38,818 INFO 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 19:21:38,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:38,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207383247] [2024-06-21 19:21:38,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207383247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:38,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:38,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:21:38,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692203950] [2024-06-21 19:21:38,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:38,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:21:38,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:21:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:21:38,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:38,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 366 transitions, 3775 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 19:21:38,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:38,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:38,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:39,645 INFO L124 PetriNetUnfolderBase]: 922/1706 cut-off events. [2024-06-21 19:21:39,645 INFO L125 PetriNetUnfolderBase]: For 515918/515918 co-relation queries the response was YES. [2024-06-21 19:21:39,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13778 conditions, 1706 events. 922/1706 cut-off events. For 515918/515918 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 10071 event pairs, 267 based on Foata normal form. 8/1712 useless extension candidates. Maximal degree in co-relation 13596. Up to 1474 conditions per place. [2024-06-21 19:21:39,667 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 327 selfloop transitions, 53 changer transitions 7/389 dead transitions. [2024-06-21 19:21:39,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 389 transitions, 4949 flow [2024-06-21 19:21:39,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:39,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 19:21:39,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-21 19:21:39,668 INFO L175 Difference]: Start difference. First operand has 415 places, 366 transitions, 3775 flow. Second operand 12 states and 147 transitions. [2024-06-21 19:21:39,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 389 transitions, 4949 flow [2024-06-21 19:21:40,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 389 transitions, 4790 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 19:21:40,747 INFO L231 Difference]: Finished difference. Result has 414 places, 364 transitions, 3704 flow [2024-06-21 19:21:40,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3704, PETRI_PLACES=414, PETRI_TRANSITIONS=364} [2024-06-21 19:21:40,747 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 384 predicate places. [2024-06-21 19:21:40,747 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 364 transitions, 3704 flow [2024-06-21 19:21:40,748 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 19:21:40,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:40,748 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 19:21:40,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-21 19:21:40,748 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:40,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:40,748 INFO L85 PathProgramCache]: Analyzing trace with hash -438082820, now seen corresponding path program 18 times [2024-06-21 19:21:40,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:40,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045037443] [2024-06-21 19:21:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:40,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:42,741 INFO 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 19:21:42,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:42,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045037443] [2024-06-21 19:21:42,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045037443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:42,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:42,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:42,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754242555] [2024-06-21 19:21:42,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:42,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:42,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:42,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:42,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 364 transitions, 3704 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:42,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:42,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:42,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:43,544 INFO L124 PetriNetUnfolderBase]: 891/1645 cut-off events. [2024-06-21 19:21:43,544 INFO L125 PetriNetUnfolderBase]: For 433766/433766 co-relation queries the response was YES. [2024-06-21 19:21:43,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12054 conditions, 1645 events. 891/1645 cut-off events. For 433766/433766 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 9624 event pairs, 259 based on Foata normal form. 10/1653 useless extension candidates. Maximal degree in co-relation 11872. Up to 1375 conditions per place. [2024-06-21 19:21:43,567 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 297 selfloop transitions, 72 changer transitions 12/383 dead transitions. [2024-06-21 19:21:43,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 383 transitions, 4546 flow [2024-06-21 19:21:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 19:21:43,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:21:43,568 INFO L175 Difference]: Start difference. First operand has 414 places, 364 transitions, 3704 flow. Second operand 12 states and 144 transitions. [2024-06-21 19:21:43,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 383 transitions, 4546 flow [2024-06-21 19:21:44,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 383 transitions, 4439 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:21:44,695 INFO L231 Difference]: Finished difference. Result has 414 places, 359 transitions, 3679 flow [2024-06-21 19:21:44,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3679, PETRI_PLACES=414, PETRI_TRANSITIONS=359} [2024-06-21 19:21:44,695 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 384 predicate places. [2024-06-21 19:21:44,695 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 359 transitions, 3679 flow [2024-06-21 19:21:44,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:44,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:44,696 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 19:21:44,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-21 19:21:44,696 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:44,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:44,696 INFO L85 PathProgramCache]: Analyzing trace with hash 621764830, now seen corresponding path program 3 times [2024-06-21 19:21:44,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:44,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896304691] [2024-06-21 19:21:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:44,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:46,493 INFO 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 19:21:46,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:46,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896304691] [2024-06-21 19:21:46,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896304691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:46,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:46,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:21:46,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828111268] [2024-06-21 19:21:46,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:46,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:21:46,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:21:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:21:46,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:46,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 359 transitions, 3679 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:46,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:46,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:46,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:47,074 INFO L124 PetriNetUnfolderBase]: 877/1615 cut-off events. [2024-06-21 19:21:47,074 INFO L125 PetriNetUnfolderBase]: For 372740/372740 co-relation queries the response was YES. [2024-06-21 19:21:47,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12268 conditions, 1615 events. 877/1615 cut-off events. For 372740/372740 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 9419 event pairs, 258 based on Foata normal form. 2/1615 useless extension candidates. Maximal degree in co-relation 12086. Up to 1349 conditions per place. [2024-06-21 19:21:47,095 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 306 selfloop transitions, 66 changer transitions 0/374 dead transitions. [2024-06-21 19:21:47,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 374 transitions, 4777 flow [2024-06-21 19:21:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:21:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:21:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 19:21:47,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 19:21:47,096 INFO L175 Difference]: Start difference. First operand has 414 places, 359 transitions, 3679 flow. Second operand 11 states and 129 transitions. [2024-06-21 19:21:47,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 374 transitions, 4777 flow [2024-06-21 19:21:48,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 374 transitions, 4617 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 19:21:48,106 INFO L231 Difference]: Finished difference. Result has 410 places, 361 transitions, 3696 flow [2024-06-21 19:21:48,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3696, PETRI_PLACES=410, PETRI_TRANSITIONS=361} [2024-06-21 19:21:48,106 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2024-06-21 19:21:48,106 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 361 transitions, 3696 flow [2024-06-21 19:21:48,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:48,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:48,106 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 19:21:48,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-21 19:21:48,106 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:48,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash -443594930, now seen corresponding path program 19 times [2024-06-21 19:21:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:48,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100662785] [2024-06-21 19:21:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:48,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:49,992 INFO 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 19:21:49,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:49,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100662785] [2024-06-21 19:21:49,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100662785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:49,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:49,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:21:49,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86504756] [2024-06-21 19:21:49,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:49,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:21:49,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:21:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:21:50,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:50,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 361 transitions, 3696 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 19:21:50,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:50,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:50,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:50,787 INFO L124 PetriNetUnfolderBase]: 889/1643 cut-off events. [2024-06-21 19:21:50,787 INFO L125 PetriNetUnfolderBase]: For 433656/433656 co-relation queries the response was YES. [2024-06-21 19:21:50,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12373 conditions, 1643 events. 889/1643 cut-off events. For 433656/433656 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 9632 event pairs, 254 based on Foata normal form. 8/1649 useless extension candidates. Maximal degree in co-relation 12191. Up to 1381 conditions per place. [2024-06-21 19:21:50,807 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 295 selfloop transitions, 68 changer transitions 14/379 dead transitions. [2024-06-21 19:21:50,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 379 transitions, 4516 flow [2024-06-21 19:21:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 19:21:50,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 19:21:50,808 INFO L175 Difference]: Start difference. First operand has 410 places, 361 transitions, 3696 flow. Second operand 12 states and 141 transitions. [2024-06-21 19:21:50,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 379 transitions, 4516 flow [2024-06-21 19:21:51,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 379 transitions, 4408 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 19:21:51,844 INFO L231 Difference]: Finished difference. Result has 414 places, 357 transitions, 3683 flow [2024-06-21 19:21:51,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3590, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3683, PETRI_PLACES=414, PETRI_TRANSITIONS=357} [2024-06-21 19:21:51,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 384 predicate places. [2024-06-21 19:21:51,845 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 357 transitions, 3683 flow [2024-06-21 19:21:51,845 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 19:21:51,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:51,845 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 19:21:51,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-21 19:21:51,845 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:51,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:51,845 INFO L85 PathProgramCache]: Analyzing trace with hash 420191484, now seen corresponding path program 20 times [2024-06-21 19:21:51,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:51,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088800470] [2024-06-21 19:21:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:51,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:53,491 INFO 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 19:21:53,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:53,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088800470] [2024-06-21 19:21:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088800470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:53,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:53,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:21:53,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754216653] [2024-06-21 19:21:53,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:53,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:21:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:53,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:21:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:21:53,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:53,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 357 transitions, 3683 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 19:21:53,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:53,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:53,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:54,419 INFO L124 PetriNetUnfolderBase]: 907/1681 cut-off events. [2024-06-21 19:21:54,419 INFO L125 PetriNetUnfolderBase]: For 537215/537215 co-relation queries the response was YES. [2024-06-21 19:21:54,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13925 conditions, 1681 events. 907/1681 cut-off events. For 537215/537215 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 9857 event pairs, 268 based on Foata normal form. 8/1687 useless extension candidates. Maximal degree in co-relation 13742. Up to 1449 conditions per place. [2024-06-21 19:21:54,440 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 326 selfloop transitions, 44 changer transitions 7/379 dead transitions. [2024-06-21 19:21:54,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 379 transitions, 4827 flow [2024-06-21 19:21:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:54,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 19:21:54,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:21:54,441 INFO L175 Difference]: Start difference. First operand has 414 places, 357 transitions, 3683 flow. Second operand 12 states and 144 transitions. [2024-06-21 19:21:54,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 379 transitions, 4827 flow [2024-06-21 19:21:55,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 379 transitions, 4679 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 19:21:55,669 INFO L231 Difference]: Finished difference. Result has 411 places, 355 transitions, 3605 flow [2024-06-21 19:21:55,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3605, PETRI_PLACES=411, PETRI_TRANSITIONS=355} [2024-06-21 19:21:55,670 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 381 predicate places. [2024-06-21 19:21:55,670 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 355 transitions, 3605 flow [2024-06-21 19:21:55,670 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 19:21:55,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:55,670 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 19:21:55,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-21 19:21:55,670 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:55,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash 621488124, now seen corresponding path program 21 times [2024-06-21 19:21:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:55,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922798154] [2024-06-21 19:21:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:55,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:57,393 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 19:21:57,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:57,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922798154] [2024-06-21 19:21:57,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922798154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:57,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:57,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:57,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078796486] [2024-06-21 19:21:57,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:57,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:57,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:57,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:57,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:57,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 355 transitions, 3605 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:57,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:57,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:57,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:58,241 INFO L124 PetriNetUnfolderBase]: 905/1679 cut-off events. [2024-06-21 19:21:58,241 INFO L125 PetriNetUnfolderBase]: For 557433/557433 co-relation queries the response was YES. [2024-06-21 19:21:58,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13850 conditions, 1679 events. 905/1679 cut-off events. For 557433/557433 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 9891 event pairs, 277 based on Foata normal form. 10/1687 useless extension candidates. Maximal degree in co-relation 13667. Up to 1416 conditions per place. [2024-06-21 19:21:58,262 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 298 selfloop transitions, 60 changer transitions 12/372 dead transitions. [2024-06-21 19:21:58,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 372 transitions, 4417 flow [2024-06-21 19:21:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 19:21:58,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 19:21:58,263 INFO L175 Difference]: Start difference. First operand has 411 places, 355 transitions, 3605 flow. Second operand 12 states and 141 transitions. [2024-06-21 19:21:58,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 372 transitions, 4417 flow [2024-06-21 19:21:59,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 372 transitions, 4328 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:21:59,506 INFO L231 Difference]: Finished difference. Result has 411 places, 351 transitions, 3588 flow [2024-06-21 19:21:59,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3588, PETRI_PLACES=411, PETRI_TRANSITIONS=351} [2024-06-21 19:21:59,506 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 381 predicate places. [2024-06-21 19:21:59,506 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 351 transitions, 3588 flow [2024-06-21 19:21:59,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:59,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:59,506 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 19:21:59,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-21 19:21:59,507 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:59,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:59,507 INFO L85 PathProgramCache]: Analyzing trace with hash 614130894, now seen corresponding path program 22 times [2024-06-21 19:21:59,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:59,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269934558] [2024-06-21 19:21:59,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:59,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:01,129 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 19:22:01,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:01,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269934558] [2024-06-21 19:22:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269934558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:01,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:01,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:01,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284327553] [2024-06-21 19:22:01,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:01,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:01,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:01,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:01,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:01,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:01,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 351 transitions, 3588 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 19:22:01,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:01,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:01,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:01,965 INFO L124 PetriNetUnfolderBase]: 920/1716 cut-off events. [2024-06-21 19:22:01,965 INFO L125 PetriNetUnfolderBase]: For 639933/639933 co-relation queries the response was YES. [2024-06-21 19:22:01,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15418 conditions, 1716 events. 920/1716 cut-off events. For 639933/639933 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 10178 event pairs, 287 based on Foata normal form. 8/1722 useless extension candidates. Maximal degree in co-relation 15235. Up to 1484 conditions per place. [2024-06-21 19:22:01,988 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 319 selfloop transitions, 45 changer transitions 7/373 dead transitions. [2024-06-21 19:22:01,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 373 transitions, 4720 flow [2024-06-21 19:22:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 19:22:01,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:22:01,989 INFO L175 Difference]: Start difference. First operand has 411 places, 351 transitions, 3588 flow. Second operand 12 states and 144 transitions. [2024-06-21 19:22:01,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 373 transitions, 4720 flow [2024-06-21 19:22:03,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 373 transitions, 4588 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 19:22:03,304 INFO L231 Difference]: Finished difference. Result has 411 places, 349 transitions, 3527 flow [2024-06-21 19:22:03,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3527, PETRI_PLACES=411, PETRI_TRANSITIONS=349} [2024-06-21 19:22:03,305 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 381 predicate places. [2024-06-21 19:22:03,305 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 349 transitions, 3527 flow [2024-06-21 19:22:03,305 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 19:22:03,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:03,305 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 19:22:03,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-21 19:22:03,305 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:03,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash 414829104, now seen corresponding path program 23 times [2024-06-21 19:22:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:03,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807307543] [2024-06-21 19:22:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:03,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:04,989 INFO 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 19:22:04,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:04,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807307543] [2024-06-21 19:22:04,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807307543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:04,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:04,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:04,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461867563] [2024-06-21 19:22:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:04,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:05,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:05,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 349 transitions, 3527 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 19:22:05,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:05,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:05,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:05,839 INFO L124 PetriNetUnfolderBase]: 943/1765 cut-off events. [2024-06-21 19:22:05,839 INFO L125 PetriNetUnfolderBase]: For 742575/742575 co-relation queries the response was YES. [2024-06-21 19:22:05,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16974 conditions, 1765 events. 943/1765 cut-off events. For 742575/742575 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 10543 event pairs, 300 based on Foata normal form. 8/1771 useless extension candidates. Maximal degree in co-relation 16791. Up to 1512 conditions per place. [2024-06-21 19:22:05,863 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 312 selfloop transitions, 51 changer transitions 7/372 dead transitions. [2024-06-21 19:22:05,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 372 transitions, 4661 flow [2024-06-21 19:22:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 19:22:05,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-21 19:22:05,864 INFO L175 Difference]: Start difference. First operand has 411 places, 349 transitions, 3527 flow. Second operand 12 states and 147 transitions. [2024-06-21 19:22:05,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 372 transitions, 4661 flow [2024-06-21 19:22:07,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 372 transitions, 4568 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:22:07,600 INFO L231 Difference]: Finished difference. Result has 411 places, 347 transitions, 3519 flow [2024-06-21 19:22:07,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3519, PETRI_PLACES=411, PETRI_TRANSITIONS=347} [2024-06-21 19:22:07,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 381 predicate places. [2024-06-21 19:22:07,600 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 347 transitions, 3519 flow [2024-06-21 19:22:07,600 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 19:22:07,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:07,600 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 19:22:07,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-21 19:22:07,600 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:07,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:07,601 INFO L85 PathProgramCache]: Analyzing trace with hash 614136474, now seen corresponding path program 24 times [2024-06-21 19:22:07,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:07,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772943316] [2024-06-21 19:22:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:07,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:09,573 INFO 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 19:22:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772943316] [2024-06-21 19:22:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772943316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:09,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:09,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:09,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892242491] [2024-06-21 19:22:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:09,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:09,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 347 transitions, 3519 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:09,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:09,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:09,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:10,382 INFO L124 PetriNetUnfolderBase]: 916/1712 cut-off events. [2024-06-21 19:22:10,382 INFO L125 PetriNetUnfolderBase]: For 681466/681466 co-relation queries the response was YES. [2024-06-21 19:22:10,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15364 conditions, 1712 events. 916/1712 cut-off events. For 681466/681466 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 10181 event pairs, 284 based on Foata normal form. 12/1722 useless extension candidates. Maximal degree in co-relation 15181. Up to 1434 conditions per place. [2024-06-21 19:22:10,405 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 294 selfloop transitions, 60 changer transitions 11/367 dead transitions. [2024-06-21 19:22:10,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 367 transitions, 4341 flow [2024-06-21 19:22:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 19:22:10,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-21 19:22:10,406 INFO L175 Difference]: Start difference. First operand has 411 places, 347 transitions, 3519 flow. Second operand 12 states and 149 transitions. [2024-06-21 19:22:10,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 367 transitions, 4341 flow [2024-06-21 19:22:12,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 367 transitions, 4238 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:22:12,053 INFO L231 Difference]: Finished difference. Result has 411 places, 343 transitions, 3487 flow [2024-06-21 19:22:12,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3416, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3487, PETRI_PLACES=411, PETRI_TRANSITIONS=343} [2024-06-21 19:22:12,054 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 381 predicate places. [2024-06-21 19:22:12,054 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 343 transitions, 3487 flow [2024-06-21 19:22:12,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:12,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:12,054 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 19:22:12,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-21 19:22:12,054 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:12,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash 614338284, now seen corresponding path program 25 times [2024-06-21 19:22:12,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:12,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709344689] [2024-06-21 19:22:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:12,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:13,908 INFO 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 19:22:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:13,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709344689] [2024-06-21 19:22:13,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709344689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:13,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:13,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:13,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041816229] [2024-06-21 19:22:13,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:13,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:13,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:13,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:14,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:14,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 343 transitions, 3487 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 19:22:14,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:14,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:14,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:14,700 INFO L124 PetriNetUnfolderBase]: 907/1697 cut-off events. [2024-06-21 19:22:14,700 INFO L125 PetriNetUnfolderBase]: For 660826/660826 co-relation queries the response was YES. [2024-06-21 19:22:14,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15294 conditions, 1697 events. 907/1697 cut-off events. For 660826/660826 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 10035 event pairs, 290 based on Foata normal form. 10/1705 useless extension candidates. Maximal degree in co-relation 15111. Up to 1434 conditions per place. [2024-06-21 19:22:14,723 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 291 selfloop transitions, 55 changer transitions 12/360 dead transitions. [2024-06-21 19:22:14,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 360 transitions, 4275 flow [2024-06-21 19:22:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 19:22:14,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 19:22:14,725 INFO L175 Difference]: Start difference. First operand has 411 places, 343 transitions, 3487 flow. Second operand 12 states and 142 transitions. [2024-06-21 19:22:14,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 360 transitions, 4275 flow [2024-06-21 19:22:16,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 360 transitions, 4131 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 19:22:16,237 INFO L231 Difference]: Finished difference. Result has 410 places, 339 transitions, 3404 flow [2024-06-21 19:22:16,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3343, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3404, PETRI_PLACES=410, PETRI_TRANSITIONS=339} [2024-06-21 19:22:16,237 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2024-06-21 19:22:16,237 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 339 transitions, 3404 flow [2024-06-21 19:22:16,237 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 19:22:16,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:16,237 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 19:22:16,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-21 19:22:16,238 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:16,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:16,238 INFO L85 PathProgramCache]: Analyzing trace with hash 420197064, now seen corresponding path program 26 times [2024-06-21 19:22:16,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:16,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600381422] [2024-06-21 19:22:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:16,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:18,212 INFO 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 19:22:18,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:18,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600381422] [2024-06-21 19:22:18,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600381422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:18,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:18,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403290929] [2024-06-21 19:22:18,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:18,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:18,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:18,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:18,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 339 transitions, 3404 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:18,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:18,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:18,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:19,060 INFO L124 PetriNetUnfolderBase]: 865/1619 cut-off events. [2024-06-21 19:22:19,060 INFO L125 PetriNetUnfolderBase]: For 566069/566069 co-relation queries the response was YES. [2024-06-21 19:22:19,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13237 conditions, 1619 events. 865/1619 cut-off events. For 566069/566069 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 9516 event pairs, 276 based on Foata normal form. 12/1629 useless extension candidates. Maximal degree in co-relation 13053. Up to 1349 conditions per place. [2024-06-21 19:22:19,082 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 289 selfloop transitions, 54 changer transitions 12/357 dead transitions. [2024-06-21 19:22:19,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 357 transitions, 4186 flow [2024-06-21 19:22:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 19:22:19,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-21 19:22:19,082 INFO L175 Difference]: Start difference. First operand has 410 places, 339 transitions, 3404 flow. Second operand 12 states and 145 transitions. [2024-06-21 19:22:19,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 357 transitions, 4186 flow [2024-06-21 19:22:20,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 357 transitions, 4062 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 19:22:20,214 INFO L231 Difference]: Finished difference. Result has 409 places, 334 transitions, 3324 flow [2024-06-21 19:22:20,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3324, PETRI_PLACES=409, PETRI_TRANSITIONS=334} [2024-06-21 19:22:20,215 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 379 predicate places. [2024-06-21 19:22:20,215 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 334 transitions, 3324 flow [2024-06-21 19:22:20,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:20,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:20,215 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 19:22:20,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-21 19:22:20,215 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:20,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash 414834684, now seen corresponding path program 27 times [2024-06-21 19:22:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:20,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69034803] [2024-06-21 19:22:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:21,953 INFO 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 19:22:21,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:21,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69034803] [2024-06-21 19:22:21,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69034803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:21,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:21,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:21,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529214033] [2024-06-21 19:22:21,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:21,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:21,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:21,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:22,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:22,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 334 transitions, 3324 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:22,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:22,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:22,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:22,723 INFO L124 PetriNetUnfolderBase]: 827/1545 cut-off events. [2024-06-21 19:22:22,723 INFO L125 PetriNetUnfolderBase]: For 440747/440747 co-relation queries the response was YES. [2024-06-21 19:22:22,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11457 conditions, 1545 events. 827/1545 cut-off events. For 440747/440747 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 8980 event pairs, 264 based on Foata normal form. 10/1553 useless extension candidates. Maximal degree in co-relation 11273. Up to 1371 conditions per place. [2024-06-21 19:22:22,742 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 296 selfloop transitions, 39 changer transitions 14/351 dead transitions. [2024-06-21 19:22:22,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 351 transitions, 4092 flow [2024-06-21 19:22:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 19:22:22,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:22:22,743 INFO L175 Difference]: Start difference. First operand has 409 places, 334 transitions, 3324 flow. Second operand 12 states and 138 transitions. [2024-06-21 19:22:22,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 351 transitions, 4092 flow [2024-06-21 19:22:23,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 351 transitions, 3868 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-21 19:22:23,817 INFO L231 Difference]: Finished difference. Result has 404 places, 329 transitions, 3131 flow [2024-06-21 19:22:23,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3104, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3131, PETRI_PLACES=404, PETRI_TRANSITIONS=329} [2024-06-21 19:22:23,817 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 374 predicate places. [2024-06-21 19:22:23,817 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 329 transitions, 3131 flow [2024-06-21 19:22:23,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:23,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:23,818 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 19:22:23,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-21 19:22:23,818 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:23,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash 414684954, now seen corresponding path program 28 times [2024-06-21 19:22:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:23,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410579447] [2024-06-21 19:22:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:25,713 INFO 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 19:22:25,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:25,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410579447] [2024-06-21 19:22:25,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410579447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:25,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:25,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:25,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645059459] [2024-06-21 19:22:25,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:25,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:25,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:25,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:25,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:25,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:25,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 329 transitions, 3131 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 19:22:25,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:25,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:25,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:26,490 INFO L124 PetriNetUnfolderBase]: 814/1522 cut-off events. [2024-06-21 19:22:26,490 INFO L125 PetriNetUnfolderBase]: For 420784/420784 co-relation queries the response was YES. [2024-06-21 19:22:26,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11173 conditions, 1522 events. 814/1522 cut-off events. For 420784/420784 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 8834 event pairs, 251 based on Foata normal form. 8/1528 useless extension candidates. Maximal degree in co-relation 10989. Up to 1260 conditions per place. [2024-06-21 19:22:26,510 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 280 selfloop transitions, 50 changer transitions 14/346 dead transitions. [2024-06-21 19:22:26,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 346 transitions, 3877 flow [2024-06-21 19:22:26,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 19:22:26,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 19:22:26,517 INFO L175 Difference]: Start difference. First operand has 404 places, 329 transitions, 3131 flow. Second operand 12 states and 139 transitions. [2024-06-21 19:22:26,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 346 transitions, 3877 flow [2024-06-21 19:22:27,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 346 transitions, 3716 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 19:22:27,614 INFO L231 Difference]: Finished difference. Result has 399 places, 325 transitions, 3030 flow [2024-06-21 19:22:27,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3030, PETRI_PLACES=399, PETRI_TRANSITIONS=325} [2024-06-21 19:22:27,615 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 369 predicate places. [2024-06-21 19:22:27,615 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 325 transitions, 3030 flow [2024-06-21 19:22:27,615 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 19:22:27,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:27,615 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 19:22:27,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-21 19:22:27,615 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:27,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1722023940, now seen corresponding path program 29 times [2024-06-21 19:22:27,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:27,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623194765] [2024-06-21 19:22:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:27,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:29,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:29,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623194765] [2024-06-21 19:22:29,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623194765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:29,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:29,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:29,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724639526] [2024-06-21 19:22:29,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:29,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:29,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:29,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:29,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 325 transitions, 3030 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 19:22:29,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:29,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:29,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:30,379 INFO L124 PetriNetUnfolderBase]: 807/1508 cut-off events. [2024-06-21 19:22:30,379 INFO L125 PetriNetUnfolderBase]: For 442147/442147 co-relation queries the response was YES. [2024-06-21 19:22:30,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10960 conditions, 1508 events. 807/1508 cut-off events. For 442147/442147 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 8692 event pairs, 258 based on Foata normal form. 10/1516 useless extension candidates. Maximal degree in co-relation 10778. Up to 1423 conditions per place. [2024-06-21 19:22:30,398 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 307 selfloop transitions, 20 changer transitions 12/341 dead transitions. [2024-06-21 19:22:30,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 341 transitions, 3770 flow [2024-06-21 19:22:30,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:30,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:30,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 19:22:30,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 19:22:30,399 INFO L175 Difference]: Start difference. First operand has 399 places, 325 transitions, 3030 flow. Second operand 12 states and 129 transitions. [2024-06-21 19:22:30,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 341 transitions, 3770 flow [2024-06-21 19:22:31,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 341 transitions, 3614 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 19:22:31,487 INFO L231 Difference]: Finished difference. Result has 393 places, 321 transitions, 2884 flow [2024-06-21 19:22:31,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2884, PETRI_PLACES=393, PETRI_TRANSITIONS=321} [2024-06-21 19:22:31,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 363 predicate places. [2024-06-21 19:22:31,487 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 321 transitions, 2884 flow [2024-06-21 19:22:31,487 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 19:22:31,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:31,488 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 19:22:31,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-21 19:22:31,488 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:31,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:31,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1722029520, now seen corresponding path program 30 times [2024-06-21 19:22:31,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:31,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181516382] [2024-06-21 19:22:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:31,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:33,039 INFO 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 19:22:33,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:33,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181516382] [2024-06-21 19:22:33,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181516382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:33,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:33,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:33,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443622916] [2024-06-21 19:22:33,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:33,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:33,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:33,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:33,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:33,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 321 transitions, 2884 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 19:22:33,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:33,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:33,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:33,850 INFO L124 PetriNetUnfolderBase]: 817/1534 cut-off events. [2024-06-21 19:22:33,850 INFO L125 PetriNetUnfolderBase]: For 504343/504343 co-relation queries the response was YES. [2024-06-21 19:22:33,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12007 conditions, 1534 events. 817/1534 cut-off events. For 504343/504343 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 8880 event pairs, 264 based on Foata normal form. 8/1540 useless extension candidates. Maximal degree in co-relation 11828. Up to 1397 conditions per place. [2024-06-21 19:22:33,869 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 305 selfloop transitions, 25 changer transitions 8/340 dead transitions. [2024-06-21 19:22:33,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 340 transitions, 3932 flow [2024-06-21 19:22:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 19:22:33,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 19:22:33,870 INFO L175 Difference]: Start difference. First operand has 393 places, 321 transitions, 2884 flow. Second operand 12 states and 134 transitions. [2024-06-21 19:22:33,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 340 transitions, 3932 flow [2024-06-21 19:22:35,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 340 transitions, 3851 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 19:22:35,331 INFO L231 Difference]: Finished difference. Result has 391 places, 318 transitions, 2828 flow [2024-06-21 19:22:35,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2828, PETRI_PLACES=391, PETRI_TRANSITIONS=318} [2024-06-21 19:22:35,332 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 361 predicate places. [2024-06-21 19:22:35,332 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 318 transitions, 2828 flow [2024-06-21 19:22:35,332 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 19:22:35,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:35,332 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 19:22:35,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-21 19:22:35,332 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:35,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1721822130, now seen corresponding path program 31 times [2024-06-21 19:22:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:35,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742933580] [2024-06-21 19:22:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:35,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:37,199 INFO 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 19:22:37,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:37,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742933580] [2024-06-21 19:22:37,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742933580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:37,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:37,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:37,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45250347] [2024-06-21 19:22:37,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:37,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:37,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:37,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:37,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:37,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:37,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 318 transitions, 2828 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:37,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:37,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:37,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:37,911 INFO L124 PetriNetUnfolderBase]: 814/1529 cut-off events. [2024-06-21 19:22:37,911 INFO L125 PetriNetUnfolderBase]: For 517828/517828 co-relation queries the response was YES. [2024-06-21 19:22:37,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11926 conditions, 1529 events. 814/1529 cut-off events. For 517828/517828 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 8848 event pairs, 268 based on Foata normal form. 10/1537 useless extension candidates. Maximal degree in co-relation 11748. Up to 1417 conditions per place. [2024-06-21 19:22:37,930 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 298 selfloop transitions, 25 changer transitions 12/337 dead transitions. [2024-06-21 19:22:37,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 337 transitions, 3592 flow [2024-06-21 19:22:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:22:37,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:22:37,931 INFO L175 Difference]: Start difference. First operand has 391 places, 318 transitions, 2828 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:22:37,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 337 transitions, 3592 flow [2024-06-21 19:22:39,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 337 transitions, 3538 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 19:22:39,262 INFO L231 Difference]: Finished difference. Result has 387 places, 314 transitions, 2784 flow [2024-06-21 19:22:39,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2784, PETRI_PLACES=387, PETRI_TRANSITIONS=314} [2024-06-21 19:22:39,263 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2024-06-21 19:22:39,263 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 314 transitions, 2784 flow [2024-06-21 19:22:39,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:39,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:39,263 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 19:22:39,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-21 19:22:39,263 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:39,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash 616272550, now seen corresponding path program 32 times [2024-06-21 19:22:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:39,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036138066] [2024-06-21 19:22:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:39,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:41,262 INFO 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 19:22:41,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:41,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036138066] [2024-06-21 19:22:41,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036138066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:41,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:41,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:41,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888473560] [2024-06-21 19:22:41,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:41,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:41,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:41,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:41,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:41,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:41,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 314 transitions, 2784 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 19:22:41,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:41,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:41,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:42,127 INFO L124 PetriNetUnfolderBase]: 804/1515 cut-off events. [2024-06-21 19:22:42,127 INFO L125 PetriNetUnfolderBase]: For 503586/503586 co-relation queries the response was YES. [2024-06-21 19:22:42,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11768 conditions, 1515 events. 804/1515 cut-off events. For 503586/503586 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 8781 event pairs, 262 based on Foata normal form. 10/1523 useless extension candidates. Maximal degree in co-relation 11592. Up to 1403 conditions per place. [2024-06-21 19:22:42,147 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 298 selfloop transitions, 21 changer transitions 12/333 dead transitions. [2024-06-21 19:22:42,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 333 transitions, 3540 flow [2024-06-21 19:22:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 19:22:42,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 19:22:42,148 INFO L175 Difference]: Start difference. First operand has 387 places, 314 transitions, 2784 flow. Second operand 12 states and 131 transitions. [2024-06-21 19:22:42,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 333 transitions, 3540 flow [2024-06-21 19:22:43,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 333 transitions, 3486 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:22:43,396 INFO L231 Difference]: Finished difference. Result has 386 places, 310 transitions, 2732 flow [2024-06-21 19:22:43,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2730, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2732, PETRI_PLACES=386, PETRI_TRANSITIONS=310} [2024-06-21 19:22:43,397 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2024-06-21 19:22:43,397 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 310 transitions, 2732 flow [2024-06-21 19:22:43,397 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 19:22:43,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:43,397 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 19:22:43,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-21 19:22:43,397 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:43,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:43,398 INFO L85 PathProgramCache]: Analyzing trace with hash 852873772, now seen corresponding path program 4 times [2024-06-21 19:22:43,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:43,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029888111] [2024-06-21 19:22:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:43,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:45,375 INFO 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 19:22:45,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:45,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029888111] [2024-06-21 19:22:45,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029888111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:45,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:45,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:45,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319310271] [2024-06-21 19:22:45,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:45,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:45,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:45,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:45,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 310 transitions, 2732 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:45,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:45,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:45,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:46,139 INFO L124 PetriNetUnfolderBase]: 782/1473 cut-off events. [2024-06-21 19:22:46,139 INFO L125 PetriNetUnfolderBase]: For 417787/417787 co-relation queries the response was YES. [2024-06-21 19:22:46,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11567 conditions, 1473 events. 782/1473 cut-off events. For 417787/417787 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 8467 event pairs, 258 based on Foata normal form. 2/1473 useless extension candidates. Maximal degree in co-relation 11392. Up to 1364 conditions per place. [2024-06-21 19:22:46,163 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 285 selfloop transitions, 37 changer transitions 0/324 dead transitions. [2024-06-21 19:22:46,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 324 transitions, 3448 flow [2024-06-21 19:22:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 19:22:46,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 19:22:46,164 INFO L175 Difference]: Start difference. First operand has 386 places, 310 transitions, 2732 flow. Second operand 11 states and 123 transitions. [2024-06-21 19:22:46,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 324 transitions, 3448 flow [2024-06-21 19:22:47,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 324 transitions, 3402 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:22:47,281 INFO L231 Difference]: Finished difference. Result has 383 places, 311 transitions, 2786 flow [2024-06-21 19:22:47,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2686, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2786, PETRI_PLACES=383, PETRI_TRANSITIONS=311} [2024-06-21 19:22:47,281 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 353 predicate places. [2024-06-21 19:22:47,281 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 311 transitions, 2786 flow [2024-06-21 19:22:47,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:47,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:47,281 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 19:22:47,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-21 19:22:47,282 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:47,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:47,282 INFO L85 PathProgramCache]: Analyzing trace with hash 609130646, now seen corresponding path program 5 times [2024-06-21 19:22:47,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:47,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983945117] [2024-06-21 19:22:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:47,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:48,900 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 19:22:48,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:48,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983945117] [2024-06-21 19:22:48,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983945117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:48,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:48,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:48,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798186470] [2024-06-21 19:22:48,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:48,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:48,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:48,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:48,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 311 transitions, 2786 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:48,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:48,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:48,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:49,510 INFO L124 PetriNetUnfolderBase]: 786/1481 cut-off events. [2024-06-21 19:22:49,510 INFO L125 PetriNetUnfolderBase]: For 412180/412180 co-relation queries the response was YES. [2024-06-21 19:22:49,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11626 conditions, 1481 events. 786/1481 cut-off events. For 412180/412180 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 8537 event pairs, 264 based on Foata normal form. 2/1481 useless extension candidates. Maximal degree in co-relation 11452. Up to 1413 conditions per place. [2024-06-21 19:22:49,528 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 299 selfloop transitions, 24 changer transitions 0/325 dead transitions. [2024-06-21 19:22:49,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 325 transitions, 3506 flow [2024-06-21 19:22:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 19:22:49,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 19:22:49,529 INFO L175 Difference]: Start difference. First operand has 383 places, 311 transitions, 2786 flow. Second operand 11 states and 117 transitions. [2024-06-21 19:22:49,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 325 transitions, 3506 flow [2024-06-21 19:22:50,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 325 transitions, 3416 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 19:22:50,716 INFO L231 Difference]: Finished difference. Result has 385 places, 312 transitions, 2772 flow [2024-06-21 19:22:50,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2772, PETRI_PLACES=385, PETRI_TRANSITIONS=312} [2024-06-21 19:22:50,716 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 355 predicate places. [2024-06-21 19:22:50,716 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 312 transitions, 2772 flow [2024-06-21 19:22:50,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:50,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:50,716 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 19:22:50,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-21 19:22:50,716 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:50,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash 616280486, now seen corresponding path program 6 times [2024-06-21 19:22:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:50,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768521334] [2024-06-21 19:22:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:52,481 INFO 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 19:22:52,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:52,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768521334] [2024-06-21 19:22:52,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768521334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:52,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:52,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:52,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185858066] [2024-06-21 19:22:52,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:52,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:52,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 312 transitions, 2772 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 19:22:52,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:52,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:52,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:53,076 INFO L124 PetriNetUnfolderBase]: 790/1489 cut-off events. [2024-06-21 19:22:53,077 INFO L125 PetriNetUnfolderBase]: For 417905/417905 co-relation queries the response was YES. [2024-06-21 19:22:53,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11677 conditions, 1489 events. 790/1489 cut-off events. For 417905/417905 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 8620 event pairs, 262 based on Foata normal form. 2/1489 useless extension candidates. Maximal degree in co-relation 11502. Up to 1421 conditions per place. [2024-06-21 19:22:53,096 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 302 selfloop transitions, 22 changer transitions 0/326 dead transitions. [2024-06-21 19:22:53,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 326 transitions, 3496 flow [2024-06-21 19:22:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 19:22:53,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 19:22:53,097 INFO L175 Difference]: Start difference. First operand has 385 places, 312 transitions, 2772 flow. Second operand 11 states and 117 transitions. [2024-06-21 19:22:53,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 326 transitions, 3496 flow [2024-06-21 19:22:54,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 326 transitions, 3430 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 19:22:54,389 INFO L231 Difference]: Finished difference. Result has 387 places, 313 transitions, 2780 flow [2024-06-21 19:22:54,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2780, PETRI_PLACES=387, PETRI_TRANSITIONS=313} [2024-06-21 19:22:54,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2024-06-21 19:22:54,390 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 313 transitions, 2780 flow [2024-06-21 19:22:54,390 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 19:22:54,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:54,390 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 19:22:54,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-21 19:22:54,390 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:54,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:54,390 INFO L85 PathProgramCache]: Analyzing trace with hash 616549256, now seen corresponding path program 7 times [2024-06-21 19:22:54,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:54,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139405008] [2024-06-21 19:22:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:54,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:56,323 INFO 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 19:22:56,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:56,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139405008] [2024-06-21 19:22:56,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139405008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:56,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:56,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:56,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465111385] [2024-06-21 19:22:56,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:56,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:56,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:56,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:56,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:56,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:56,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 313 transitions, 2780 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:56,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:56,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:56,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:56,945 INFO L124 PetriNetUnfolderBase]: 794/1497 cut-off events. [2024-06-21 19:22:56,945 INFO L125 PetriNetUnfolderBase]: For 423826/423826 co-relation queries the response was YES. [2024-06-21 19:22:56,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11750 conditions, 1497 events. 794/1497 cut-off events. For 423826/423826 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 8694 event pairs, 262 based on Foata normal form. 2/1497 useless extension candidates. Maximal degree in co-relation 11574. Up to 1409 conditions per place. [2024-06-21 19:22:56,960 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 302 selfloop transitions, 23 changer transitions 0/327 dead transitions. [2024-06-21 19:22:56,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 327 transitions, 3500 flow [2024-06-21 19:22:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:22:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:22:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 19:22:56,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 19:22:56,961 INFO L175 Difference]: Start difference. First operand has 387 places, 313 transitions, 2780 flow. Second operand 10 states and 112 transitions. [2024-06-21 19:22:56,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 327 transitions, 3500 flow [2024-06-21 19:22:58,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 327 transitions, 3436 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 19:22:58,351 INFO L231 Difference]: Finished difference. Result has 388 places, 314 transitions, 2794 flow [2024-06-21 19:22:58,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2794, PETRI_PLACES=388, PETRI_TRANSITIONS=314} [2024-06-21 19:22:58,351 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 358 predicate places. [2024-06-21 19:22:58,351 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 314 transitions, 2794 flow [2024-06-21 19:22:58,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:58,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:58,351 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 19:22:58,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-21 19:22:58,352 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:58,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1141493086, now seen corresponding path program 8 times [2024-06-21 19:22:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473636997] [2024-06-21 19:22:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:59,834 INFO 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 19:22:59,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:59,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473636997] [2024-06-21 19:22:59,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473636997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:59,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:59,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:59,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925642676] [2024-06-21 19:22:59,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:59,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:59,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:59,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:59,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 314 transitions, 2794 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:59,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:59,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:59,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:00,435 INFO L124 PetriNetUnfolderBase]: 798/1505 cut-off events. [2024-06-21 19:23:00,435 INFO L125 PetriNetUnfolderBase]: For 430093/430093 co-relation queries the response was YES. [2024-06-21 19:23:00,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11835 conditions, 1505 events. 798/1505 cut-off events. For 430093/430093 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 8759 event pairs, 260 based on Foata normal form. 2/1505 useless extension candidates. Maximal degree in co-relation 11658. Up to 1458 conditions per place. [2024-06-21 19:23:00,453 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 308 selfloop transitions, 17 changer transitions 0/327 dead transitions. [2024-06-21 19:23:00,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 327 transitions, 3498 flow [2024-06-21 19:23:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:23:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:23:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 19:23:00,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3313782991202346 [2024-06-21 19:23:00,454 INFO L175 Difference]: Start difference. First operand has 388 places, 314 transitions, 2794 flow. Second operand 11 states and 113 transitions. [2024-06-21 19:23:00,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 327 transitions, 3498 flow [2024-06-21 19:23:01,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 327 transitions, 3430 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 19:23:01,757 INFO L231 Difference]: Finished difference. Result has 391 places, 315 transitions, 2794 flow [2024-06-21 19:23:01,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2794, PETRI_PLACES=391, PETRI_TRANSITIONS=315} [2024-06-21 19:23:01,759 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 361 predicate places. [2024-06-21 19:23:01,759 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 315 transitions, 2794 flow [2024-06-21 19:23:01,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:01,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:01,759 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 19:23:01,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-21 19:23:01,759 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:01,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash 845254716, now seen corresponding path program 33 times [2024-06-21 19:23:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:01,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973902915] [2024-06-21 19:23:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:01,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:03,550 INFO 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 19:23:03,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:03,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973902915] [2024-06-21 19:23:03,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973902915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:03,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:03,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:23:03,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850032480] [2024-06-21 19:23:03,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:03,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:23:03,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:03,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:23:03,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:23:03,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:03,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 315 transitions, 2794 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 19:23:03,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:03,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:03,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:04,373 INFO L124 PetriNetUnfolderBase]: 814/1541 cut-off events. [2024-06-21 19:23:04,374 INFO L125 PetriNetUnfolderBase]: For 518198/518198 co-relation queries the response was YES. [2024-06-21 19:23:04,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11952 conditions, 1541 events. 814/1541 cut-off events. For 518198/518198 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 9053 event pairs, 268 based on Foata normal form. 10/1549 useless extension candidates. Maximal degree in co-relation 11774. Up to 1371 conditions per place. [2024-06-21 19:23:04,389 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 282 selfloop transitions, 39 changer transitions 12/335 dead transitions. [2024-06-21 19:23:04,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 335 transitions, 3558 flow [2024-06-21 19:23:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 19:23:04,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 19:23:04,390 INFO L175 Difference]: Start difference. First operand has 391 places, 315 transitions, 2794 flow. Second operand 12 states and 139 transitions. [2024-06-21 19:23:04,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 335 transitions, 3558 flow [2024-06-21 19:23:05,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 335 transitions, 3500 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 19:23:05,697 INFO L231 Difference]: Finished difference. Result has 394 places, 311 transitions, 2784 flow [2024-06-21 19:23:05,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2784, PETRI_PLACES=394, PETRI_TRANSITIONS=311} [2024-06-21 19:23:05,698 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 364 predicate places. [2024-06-21 19:23:05,698 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 311 transitions, 2784 flow [2024-06-21 19:23:05,698 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 19:23:05,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:05,698 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 19:23:05,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-21 19:23:05,698 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:05,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash 845249136, now seen corresponding path program 34 times [2024-06-21 19:23:05,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:05,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412698571] [2024-06-21 19:23:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:05,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:07,358 INFO 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 19:23:07,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:07,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412698571] [2024-06-21 19:23:07,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412698571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:07,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:07,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:07,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073462105] [2024-06-21 19:23:07,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:07,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:07,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:07,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:07,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 311 transitions, 2784 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:07,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:07,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:07,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:08,091 INFO L124 PetriNetUnfolderBase]: 802/1521 cut-off events. [2024-06-21 19:23:08,091 INFO L125 PetriNetUnfolderBase]: For 503932/503932 co-relation queries the response was YES. [2024-06-21 19:23:08,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11899 conditions, 1521 events. 802/1521 cut-off events. For 503932/503932 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 8906 event pairs, 266 based on Foata normal form. 8/1527 useless extension candidates. Maximal degree in co-relation 11720. Up to 1431 conditions per place. [2024-06-21 19:23:08,110 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 290 selfloop transitions, 23 changer transitions 11/326 dead transitions. [2024-06-21 19:23:08,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 326 transitions, 3484 flow [2024-06-21 19:23:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 19:23:08,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 19:23:08,111 INFO L175 Difference]: Start difference. First operand has 394 places, 311 transitions, 2784 flow. Second operand 12 states and 129 transitions. [2024-06-21 19:23:08,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 326 transitions, 3484 flow [2024-06-21 19:23:09,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 326 transitions, 3402 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:09,404 INFO L231 Difference]: Finished difference. Result has 392 places, 308 transitions, 2722 flow [2024-06-21 19:23:09,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2722, PETRI_PLACES=392, PETRI_TRANSITIONS=308} [2024-06-21 19:23:09,404 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 362 predicate places. [2024-06-21 19:23:09,405 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 308 transitions, 2722 flow [2024-06-21 19:23:09,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:09,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:09,405 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 19:23:09,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2024-06-21 19:23:09,405 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:09,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:09,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1457296906, now seen corresponding path program 9 times [2024-06-21 19:23:09,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:09,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271373219] [2024-06-21 19:23:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:09,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:11,021 INFO 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 19:23:11,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:11,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271373219] [2024-06-21 19:23:11,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271373219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:11,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:11,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:11,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577652913] [2024-06-21 19:23:11,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:11,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:11,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:11,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:11,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 308 transitions, 2722 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:11,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:11,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:11,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:11,685 INFO L124 PetriNetUnfolderBase]: 794/1501 cut-off events. [2024-06-21 19:23:11,685 INFO L125 PetriNetUnfolderBase]: For 456820/456820 co-relation queries the response was YES. [2024-06-21 19:23:11,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12140 conditions, 1501 events. 794/1501 cut-off events. For 456820/456820 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 8753 event pairs, 267 based on Foata normal form. 2/1501 useless extension candidates. Maximal degree in co-relation 11962. Up to 1421 conditions per place. [2024-06-21 19:23:11,701 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 297 selfloop transitions, 23 changer transitions 0/322 dead transitions. [2024-06-21 19:23:11,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 322 transitions, 3736 flow [2024-06-21 19:23:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:23:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:23:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 19:23:11,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-21 19:23:11,702 INFO L175 Difference]: Start difference. First operand has 392 places, 308 transitions, 2722 flow. Second operand 11 states and 118 transitions. [2024-06-21 19:23:11,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 322 transitions, 3736 flow [2024-06-21 19:23:12,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 322 transitions, 3678 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:12,978 INFO L231 Difference]: Finished difference. Result has 387 places, 310 transitions, 2783 flow [2024-06-21 19:23:12,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2783, PETRI_PLACES=387, PETRI_TRANSITIONS=310} [2024-06-21 19:23:12,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2024-06-21 19:23:12,979 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 310 transitions, 2783 flow [2024-06-21 19:23:12,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:12,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:12,979 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 19:23:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2024-06-21 19:23:12,979 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:12,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:12,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1457306206, now seen corresponding path program 10 times [2024-06-21 19:23:12,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:12,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106262765] [2024-06-21 19:23:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:12,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:14,522 INFO 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 19:23:14,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:14,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106262765] [2024-06-21 19:23:14,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106262765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:14,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:14,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:14,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84437887] [2024-06-21 19:23:14,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:14,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:14,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:14,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:14,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:14,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:14,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 310 transitions, 2783 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:14,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:14,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:14,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:15,249 INFO L124 PetriNetUnfolderBase]: 791/1496 cut-off events. [2024-06-21 19:23:15,249 INFO L125 PetriNetUnfolderBase]: For 424360/424360 co-relation queries the response was YES. [2024-06-21 19:23:15,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11750 conditions, 1496 events. 791/1496 cut-off events. For 424360/424360 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 8705 event pairs, 268 based on Foata normal form. 2/1496 useless extension candidates. Maximal degree in co-relation 11574. Up to 1443 conditions per place. [2024-06-21 19:23:15,273 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 295 selfloop transitions, 23 changer transitions 0/320 dead transitions. [2024-06-21 19:23:15,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 320 transitions, 3441 flow [2024-06-21 19:23:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:23:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:23:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 19:23:15,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:23:15,275 INFO L175 Difference]: Start difference. First operand has 387 places, 310 transitions, 2783 flow. Second operand 10 states and 110 transitions. [2024-06-21 19:23:15,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 320 transitions, 3441 flow [2024-06-21 19:23:16,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 320 transitions, 3359 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 19:23:16,608 INFO L231 Difference]: Finished difference. Result has 390 places, 310 transitions, 2752 flow [2024-06-21 19:23:16,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2752, PETRI_PLACES=390, PETRI_TRANSITIONS=310} [2024-06-21 19:23:16,609 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 360 predicate places. [2024-06-21 19:23:16,609 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 310 transitions, 2752 flow [2024-06-21 19:23:16,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:16,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:16,609 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 19:23:16,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2024-06-21 19:23:16,609 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:16,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1959479688, now seen corresponding path program 11 times [2024-06-21 19:23:16,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:16,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056082067] [2024-06-21 19:23:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:16,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:18,337 INFO 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 19:23:18,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:18,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056082067] [2024-06-21 19:23:18,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056082067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:18,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:18,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:18,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819209453] [2024-06-21 19:23:18,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:18,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:18,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:18,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:18,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:18,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:18,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 310 transitions, 2752 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:18,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:18,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:18,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:19,017 INFO L124 PetriNetUnfolderBase]: 802/1517 cut-off events. [2024-06-21 19:23:19,018 INFO L125 PetriNetUnfolderBase]: For 450808/450808 co-relation queries the response was YES. [2024-06-21 19:23:19,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12195 conditions, 1517 events. 802/1517 cut-off events. For 450808/450808 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 8874 event pairs, 269 based on Foata normal form. 2/1517 useless extension candidates. Maximal degree in co-relation 12017. Up to 1383 conditions per place. [2024-06-21 19:23:19,032 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 287 selfloop transitions, 37 changer transitions 0/326 dead transitions. [2024-06-21 19:23:19,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 326 transitions, 3796 flow [2024-06-21 19:23:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:23:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:23:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 19:23:19,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 19:23:19,033 INFO L175 Difference]: Start difference. First operand has 390 places, 310 transitions, 2752 flow. Second operand 11 states and 124 transitions. [2024-06-21 19:23:19,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 326 transitions, 3796 flow [2024-06-21 19:23:20,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 326 transitions, 3746 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 19:23:20,357 INFO L231 Difference]: Finished difference. Result has 392 places, 312 transitions, 2846 flow [2024-06-21 19:23:20,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2846, PETRI_PLACES=392, PETRI_TRANSITIONS=312} [2024-06-21 19:23:20,357 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 362 predicate places. [2024-06-21 19:23:20,357 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 312 transitions, 2846 flow [2024-06-21 19:23:20,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:20,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:20,357 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 19:23:20,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2024-06-21 19:23:20,357 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:20,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1959756394, now seen corresponding path program 35 times [2024-06-21 19:23:20,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:20,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890020068] [2024-06-21 19:23:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:20,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:22,218 INFO 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 19:23:22,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:22,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890020068] [2024-06-21 19:23:22,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890020068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:22,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:22,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:23:22,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787244062] [2024-06-21 19:23:22,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:22,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:23:22,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:22,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:23:22,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:23:22,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:22,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 312 transitions, 2846 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 19:23:22,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:22,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:22,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:23,032 INFO L124 PetriNetUnfolderBase]: 818/1553 cut-off events. [2024-06-21 19:23:23,032 INFO L125 PetriNetUnfolderBase]: For 539667/539667 co-relation queries the response was YES. [2024-06-21 19:23:23,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12404 conditions, 1553 events. 818/1553 cut-off events. For 539667/539667 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 9165 event pairs, 281 based on Foata normal form. 10/1561 useless extension candidates. Maximal degree in co-relation 12225. Up to 1400 conditions per place. [2024-06-21 19:23:23,051 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 284 selfloop transitions, 33 changer transitions 12/331 dead transitions. [2024-06-21 19:23:23,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 331 transitions, 3598 flow [2024-06-21 19:23:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 19:23:23,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 19:23:23,052 INFO L175 Difference]: Start difference. First operand has 392 places, 312 transitions, 2846 flow. Second operand 12 states and 136 transitions. [2024-06-21 19:23:23,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 331 transitions, 3598 flow [2024-06-21 19:23:24,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 331 transitions, 3514 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 19:23:24,347 INFO L231 Difference]: Finished difference. Result has 397 places, 308 transitions, 2788 flow [2024-06-21 19:23:24,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2788, PETRI_PLACES=397, PETRI_TRANSITIONS=308} [2024-06-21 19:23:24,347 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2024-06-21 19:23:24,348 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 308 transitions, 2788 flow [2024-06-21 19:23:24,348 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 19:23:24,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:24,348 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 19:23:24,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2024-06-21 19:23:24,348 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:24,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash 889290928, now seen corresponding path program 36 times [2024-06-21 19:23:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:24,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18301869] [2024-06-21 19:23:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:26,057 INFO 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 19:23:26,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:26,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18301869] [2024-06-21 19:23:26,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18301869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:26,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:26,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:26,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955834667] [2024-06-21 19:23:26,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:26,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:26,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:26,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:26,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:26,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:26,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 308 transitions, 2788 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:26,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:26,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:26,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:26,866 INFO L124 PetriNetUnfolderBase]: 808/1539 cut-off events. [2024-06-21 19:23:26,867 INFO L125 PetriNetUnfolderBase]: For 546455/546455 co-relation queries the response was YES. [2024-06-21 19:23:26,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12321 conditions, 1539 events. 808/1539 cut-off events. For 546455/546455 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 9090 event pairs, 281 based on Foata normal form. 10/1547 useless extension candidates. Maximal degree in co-relation 12140. Up to 1386 conditions per place. [2024-06-21 19:23:26,885 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 284 selfloop transitions, 30 changer transitions 12/328 dead transitions. [2024-06-21 19:23:26,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 328 transitions, 3544 flow [2024-06-21 19:23:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 19:23:26,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 19:23:26,886 INFO L175 Difference]: Start difference. First operand has 397 places, 308 transitions, 2788 flow. Second operand 12 states and 137 transitions. [2024-06-21 19:23:26,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 328 transitions, 3544 flow [2024-06-21 19:23:28,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 328 transitions, 3474 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:28,277 INFO L231 Difference]: Finished difference. Result has 395 places, 304 transitions, 2738 flow [2024-06-21 19:23:28,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2738, PETRI_PLACES=395, PETRI_TRANSITIONS=304} [2024-06-21 19:23:28,277 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 365 predicate places. [2024-06-21 19:23:28,277 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 304 transitions, 2738 flow [2024-06-21 19:23:28,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:28,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:28,277 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 19:23:28,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2024-06-21 19:23:28,277 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:28,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash 845464462, now seen corresponding path program 12 times [2024-06-21 19:23:28,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:28,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057200643] [2024-06-21 19:23:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:28,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:29,988 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 19:23:29,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:29,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057200643] [2024-06-21 19:23:29,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057200643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:29,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:29,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:29,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225533572] [2024-06-21 19:23:29,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:29,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:29,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:29,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:29,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:30,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:30,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 304 transitions, 2738 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:30,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:30,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:30,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:30,746 INFO L124 PetriNetUnfolderBase]: 786/1497 cut-off events. [2024-06-21 19:23:30,746 INFO L125 PetriNetUnfolderBase]: For 456941/456941 co-relation queries the response was YES. [2024-06-21 19:23:30,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12128 conditions, 1497 events. 786/1497 cut-off events. For 456941/456941 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 8793 event pairs, 277 based on Foata normal form. 2/1497 useless extension candidates. Maximal degree in co-relation 11948. Up to 1388 conditions per place. [2024-06-21 19:23:30,764 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 286 selfloop transitions, 31 changer transitions 0/319 dead transitions. [2024-06-21 19:23:30,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 319 transitions, 3458 flow [2024-06-21 19:23:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:23:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:23:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 19:23:30,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 19:23:30,765 INFO L175 Difference]: Start difference. First operand has 395 places, 304 transitions, 2738 flow. Second operand 10 states and 117 transitions. [2024-06-21 19:23:30,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 319 transitions, 3458 flow [2024-06-21 19:23:31,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 319 transitions, 3394 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:31,953 INFO L231 Difference]: Finished difference. Result has 391 places, 305 transitions, 2766 flow [2024-06-21 19:23:31,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2766, PETRI_PLACES=391, PETRI_TRANSITIONS=305} [2024-06-21 19:23:31,953 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 361 predicate places. [2024-06-21 19:23:31,953 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 305 transitions, 2766 flow [2024-06-21 19:23:31,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:31,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:31,954 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 19:23:31,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2024-06-21 19:23:31,954 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:31,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:31,954 INFO L85 PathProgramCache]: Analyzing trace with hash 695351518, now seen corresponding path program 37 times [2024-06-21 19:23:31,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:31,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738098877] [2024-06-21 19:23:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:31,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:33,621 INFO 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 19:23:33,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:33,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738098877] [2024-06-21 19:23:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738098877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:33,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:33,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:33,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504376801] [2024-06-21 19:23:33,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:33,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:33,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:33,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:33,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:33,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 305 transitions, 2766 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:33,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:33,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:33,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:34,373 INFO L124 PetriNetUnfolderBase]: 773/1474 cut-off events. [2024-06-21 19:23:34,374 INFO L125 PetriNetUnfolderBase]: For 430242/430242 co-relation queries the response was YES. [2024-06-21 19:23:34,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10597 conditions, 1474 events. 773/1474 cut-off events. For 430242/430242 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 8642 event pairs, 262 based on Foata normal form. 10/1482 useless extension candidates. Maximal degree in co-relation 10418. Up to 1321 conditions per place. [2024-06-21 19:23:34,391 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 275 selfloop transitions, 33 changer transitions 12/322 dead transitions. [2024-06-21 19:23:34,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 322 transitions, 3480 flow [2024-06-21 19:23:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 19:23:34,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 19:23:34,392 INFO L175 Difference]: Start difference. First operand has 391 places, 305 transitions, 2766 flow. Second operand 12 states and 135 transitions. [2024-06-21 19:23:34,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 322 transitions, 3480 flow [2024-06-21 19:23:35,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 322 transitions, 3400 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 19:23:35,408 INFO L231 Difference]: Finished difference. Result has 395 places, 301 transitions, 2712 flow [2024-06-21 19:23:35,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2686, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2712, PETRI_PLACES=395, PETRI_TRANSITIONS=301} [2024-06-21 19:23:35,408 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 365 predicate places. [2024-06-21 19:23:35,408 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 301 transitions, 2712 flow [2024-06-21 19:23:35,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:35,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:35,408 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 19:23:35,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2024-06-21 19:23:35,408 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:35,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:35,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2133914262, now seen corresponding path program 38 times [2024-06-21 19:23:35,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:35,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056963447] [2024-06-21 19:23:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:35,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:37,107 INFO 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 19:23:37,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:37,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056963447] [2024-06-21 19:23:37,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056963447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:37,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:37,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:23:37,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573323582] [2024-06-21 19:23:37,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:37,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:23:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:23:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:23:37,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:37,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 301 transitions, 2712 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 19:23:37,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:37,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:37,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:37,957 INFO L124 PetriNetUnfolderBase]: 788/1511 cut-off events. [2024-06-21 19:23:37,957 INFO L125 PetriNetUnfolderBase]: For 519021/519021 co-relation queries the response was YES. [2024-06-21 19:23:37,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12122 conditions, 1511 events. 788/1511 cut-off events. For 519021/519021 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 8929 event pairs, 271 based on Foata normal form. 8/1517 useless extension candidates. Maximal degree in co-relation 11942. Up to 1287 conditions per place. [2024-06-21 19:23:37,976 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 274 selfloop transitions, 40 changer transitions 7/323 dead transitions. [2024-06-21 19:23:37,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 323 transitions, 3744 flow [2024-06-21 19:23:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 19:23:37,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 19:23:37,977 INFO L175 Difference]: Start difference. First operand has 395 places, 301 transitions, 2712 flow. Second operand 12 states and 142 transitions. [2024-06-21 19:23:37,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 323 transitions, 3744 flow [2024-06-21 19:23:39,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 323 transitions, 3670 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:39,264 INFO L231 Difference]: Finished difference. Result has 393 places, 299 transitions, 2710 flow [2024-06-21 19:23:39,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2710, PETRI_PLACES=393, PETRI_TRANSITIONS=299} [2024-06-21 19:23:39,264 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 363 predicate places. [2024-06-21 19:23:39,264 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 299 transitions, 2710 flow [2024-06-21 19:23:39,264 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 19:23:39,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:39,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:39,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2024-06-21 19:23:39,265 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:39,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2133919842, now seen corresponding path program 39 times [2024-06-21 19:23:39,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:39,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092104340] [2024-06-21 19:23:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:39,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:41,135 INFO 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 19:23:41,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:41,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092104340] [2024-06-21 19:23:41,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092104340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:41,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:41,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:41,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576794755] [2024-06-21 19:23:41,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:41,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:41,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:41,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:41,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 299 transitions, 2710 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:41,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:41,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:41,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:41,924 INFO L124 PetriNetUnfolderBase]: 757/1450 cut-off events. [2024-06-21 19:23:41,925 INFO L125 PetriNetUnfolderBase]: For 430811/430811 co-relation queries the response was YES. [2024-06-21 19:23:41,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10459 conditions, 1450 events. 757/1450 cut-off events. For 430811/430811 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 8503 event pairs, 262 based on Foata normal form. 10/1458 useless extension candidates. Maximal degree in co-relation 10280. Up to 1296 conditions per place. [2024-06-21 19:23:41,944 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 269 selfloop transitions, 31 changer transitions 14/316 dead transitions. [2024-06-21 19:23:41,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 316 transitions, 3410 flow [2024-06-21 19:23:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 19:23:41,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 19:23:41,945 INFO L175 Difference]: Start difference. First operand has 393 places, 299 transitions, 2710 flow. Second operand 12 states and 135 transitions. [2024-06-21 19:23:41,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 316 transitions, 3410 flow [2024-06-21 19:23:43,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 316 transitions, 3329 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:43,019 INFO L231 Difference]: Finished difference. Result has 392 places, 294 transitions, 2643 flow [2024-06-21 19:23:43,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2629, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2643, PETRI_PLACES=392, PETRI_TRANSITIONS=294} [2024-06-21 19:23:43,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 362 predicate places. [2024-06-21 19:23:43,019 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 294 transitions, 2643 flow [2024-06-21 19:23:43,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:43,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:43,019 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 19:23:43,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2024-06-21 19:23:43,019 INFO L420 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:43,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:43,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2134129588, now seen corresponding path program 13 times [2024-06-21 19:23:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:43,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938960501] [2024-06-21 19:23:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:44,724 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 19:23:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938960501] [2024-06-21 19:23:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938960501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:44,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:44,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:23:44,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027803240] [2024-06-21 19:23:44,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:44,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:23:44,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:44,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:23:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:23:44,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:44,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 294 transitions, 2643 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:44,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:44,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:44,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:45,264 INFO L124 PetriNetUnfolderBase]: 729/1394 cut-off events. [2024-06-21 19:23:45,264 INFO L125 PetriNetUnfolderBase]: For 323819/323819 co-relation queries the response was YES. [2024-06-21 19:23:45,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9884 conditions, 1394 events. 729/1394 cut-off events. For 323819/323819 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8103 event pairs, 257 based on Foata normal form. 2/1394 useless extension candidates. Maximal degree in co-relation 9706. Up to 1285 conditions per place. [2024-06-21 19:23:45,277 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 270 selfloop transitions, 33 changer transitions 0/305 dead transitions. [2024-06-21 19:23:45,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 305 transitions, 3281 flow [2024-06-21 19:23:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:23:45,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:23:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 19:23:45,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 19:23:45,278 INFO L175 Difference]: Start difference. First operand has 392 places, 294 transitions, 2643 flow. Second operand 11 states and 120 transitions. [2024-06-21 19:23:45,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 305 transitions, 3281 flow [2024-06-21 19:23:46,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 305 transitions, 3195 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:46,271 INFO L231 Difference]: Finished difference. Result has 386 places, 294 transitions, 2627 flow [2024-06-21 19:23:46,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2627, PETRI_PLACES=386, PETRI_TRANSITIONS=294} [2024-06-21 19:23:46,272 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2024-06-21 19:23:46,272 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 294 transitions, 2627 flow [2024-06-21 19:23:46,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:46,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:46,272 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 19:23:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2024-06-21 19:23:46,272 INFO L420 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:46,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2128407732, now seen corresponding path program 40 times [2024-06-21 19:23:46,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:46,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125943657] [2024-06-21 19:23:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:48,025 INFO 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 19:23:48,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:48,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125943657] [2024-06-21 19:23:48,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125943657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:48,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:48,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:48,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659344922] [2024-06-21 19:23:48,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:48,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:48,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:48,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:48,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:48,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:48,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 294 transitions, 2627 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:48,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:48,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:48,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:48,737 INFO L124 PetriNetUnfolderBase]: 741/1422 cut-off events. [2024-06-21 19:23:48,737 INFO L125 PetriNetUnfolderBase]: For 372626/372626 co-relation queries the response was YES. [2024-06-21 19:23:48,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9892 conditions, 1422 events. 741/1422 cut-off events. For 372626/372626 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 8322 event pairs, 255 based on Foata normal form. 8/1428 useless extension candidates. Maximal degree in co-relation 9716. Up to 1240 conditions per place. [2024-06-21 19:23:48,754 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 276 selfloop transitions, 27 changer transitions 10/315 dead transitions. [2024-06-21 19:23:48,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 315 transitions, 3623 flow [2024-06-21 19:23:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:23:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:23:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 19:23:48,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 19:23:48,755 INFO L175 Difference]: Start difference. First operand has 386 places, 294 transitions, 2627 flow. Second operand 11 states and 133 transitions. [2024-06-21 19:23:48,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 315 transitions, 3623 flow [2024-06-21 19:23:49,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 315 transitions, 3547 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:23:49,847 INFO L231 Difference]: Finished difference. Result has 387 places, 291 transitions, 2589 flow [2024-06-21 19:23:49,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2551, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2589, PETRI_PLACES=387, PETRI_TRANSITIONS=291} [2024-06-21 19:23:49,847 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2024-06-21 19:23:49,847 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 291 transitions, 2589 flow [2024-06-21 19:23:49,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:49,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:49,847 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 19:23:49,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2024-06-21 19:23:49,847 INFO L420 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:49,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash 645947346, now seen corresponding path program 41 times [2024-06-21 19:23:49,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:49,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834018439] [2024-06-21 19:23:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:51,455 INFO 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 19:23:51,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:51,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834018439] [2024-06-21 19:23:51,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834018439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:51,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:51,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:51,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811773312] [2024-06-21 19:23:51,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:51,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:51,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:51,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:51,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 291 transitions, 2589 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:51,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:51,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:51,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:52,218 INFO L124 PetriNetUnfolderBase]: 731/1404 cut-off events. [2024-06-21 19:23:52,218 INFO L125 PetriNetUnfolderBase]: For 378746/378746 co-relation queries the response was YES. [2024-06-21 19:23:52,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9839 conditions, 1404 events. 731/1404 cut-off events. For 378746/378746 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 8180 event pairs, 249 based on Foata normal form. 8/1410 useless extension candidates. Maximal degree in co-relation 9662. Up to 1228 conditions per place. [2024-06-21 19:23:52,232 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 268 selfloop transitions, 34 changer transitions 7/311 dead transitions. [2024-06-21 19:23:52,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 311 transitions, 3577 flow [2024-06-21 19:23:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 19:23:52,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 19:23:52,233 INFO L175 Difference]: Start difference. First operand has 387 places, 291 transitions, 2589 flow. Second operand 12 states and 141 transitions. [2024-06-21 19:23:52,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 311 transitions, 3577 flow [2024-06-21 19:23:53,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 311 transitions, 3515 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 19:23:53,060 INFO L231 Difference]: Finished difference. Result has 385 places, 289 transitions, 2588 flow [2024-06-21 19:23:53,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2588, PETRI_PLACES=385, PETRI_TRANSITIONS=289} [2024-06-21 19:23:53,060 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 355 predicate places. [2024-06-21 19:23:53,060 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 289 transitions, 2588 flow [2024-06-21 19:23:53,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:53,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:53,060 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 19:23:53,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2024-06-21 19:23:53,061 INFO L420 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:53,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:53,061 INFO L85 PathProgramCache]: Analyzing trace with hash 689787328, now seen corresponding path program 42 times [2024-06-21 19:23:53,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:53,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531577678] [2024-06-21 19:23:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:53,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:54,853 INFO 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 19:23:54,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:54,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531577678] [2024-06-21 19:23:54,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531577678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:54,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:54,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:23:54,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617153766] [2024-06-21 19:23:54,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:54,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:23:54,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:54,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:23:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:23:54,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:54,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 289 transitions, 2588 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 19:23:54,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:54,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:54,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:55,502 INFO L124 PetriNetUnfolderBase]: 700/1343 cut-off events. [2024-06-21 19:23:55,502 INFO L125 PetriNetUnfolderBase]: For 290720/290720 co-relation queries the response was YES. [2024-06-21 19:23:55,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8203 conditions, 1343 events. 700/1343 cut-off events. For 290720/290720 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7776 event pairs, 240 based on Foata normal form. 10/1351 useless extension candidates. Maximal degree in co-relation 8028. Up to 1174 conditions per place. [2024-06-21 19:23:55,519 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 251 selfloop transitions, 36 changer transitions 15/304 dead transitions. [2024-06-21 19:23:55,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 304 transitions, 3250 flow [2024-06-21 19:23:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:55,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 19:23:55,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 19:23:55,521 INFO L175 Difference]: Start difference. First operand has 385 places, 289 transitions, 2588 flow. Second operand 12 states and 135 transitions. [2024-06-21 19:23:55,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 304 transitions, 3250 flow [2024-06-21 19:23:56,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 304 transitions, 3181 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:56,404 INFO L231 Difference]: Finished difference. Result has 384 places, 282 transitions, 2530 flow [2024-06-21 19:23:56,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2519, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2530, PETRI_PLACES=384, PETRI_TRANSITIONS=282} [2024-06-21 19:23:56,405 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 354 predicate places. [2024-06-21 19:23:56,405 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 282 transitions, 2530 flow [2024-06-21 19:23:56,405 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 19:23:56,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:56,405 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 19:23:56,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2024-06-21 19:23:56,405 INFO L420 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:56,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:56,406 INFO L85 PathProgramCache]: Analyzing trace with hash -432269560, now seen corresponding path program 43 times [2024-06-21 19:23:56,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:56,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175739495] [2024-06-21 19:23:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:56,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:58,038 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 19:23:58,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:58,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175739495] [2024-06-21 19:23:58,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175739495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:58,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:58,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:58,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927881427] [2024-06-21 19:23:58,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:58,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:58,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:58,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:23:58,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 282 transitions, 2530 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:58,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:58,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:23:58,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:58,741 INFO L124 PetriNetUnfolderBase]: 701/1350 cut-off events. [2024-06-21 19:23:58,741 INFO L125 PetriNetUnfolderBase]: For 324124/324124 co-relation queries the response was YES. [2024-06-21 19:23:58,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8972 conditions, 1350 events. 701/1350 cut-off events. For 324124/324124 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7773 event pairs, 112 based on Foata normal form. 8/1356 useless extension candidates. Maximal degree in co-relation 8798. Up to 503 conditions per place. [2024-06-21 19:23:58,754 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 105 changer transitions 18/309 dead transitions. [2024-06-21 19:23:58,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 309 transitions, 3514 flow [2024-06-21 19:23:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:23:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:23:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 151 transitions. [2024-06-21 19:23:58,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44281524926686217 [2024-06-21 19:23:58,755 INFO L175 Difference]: Start difference. First operand has 384 places, 282 transitions, 2530 flow. Second operand 11 states and 151 transitions. [2024-06-21 19:23:58,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 309 transitions, 3514 flow [2024-06-21 19:23:59,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 309 transitions, 3423 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 19:23:59,568 INFO L231 Difference]: Finished difference. Result has 374 places, 278 transitions, 2641 flow [2024-06-21 19:23:59,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2641, PETRI_PLACES=374, PETRI_TRANSITIONS=278} [2024-06-21 19:23:59,568 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 344 predicate places. [2024-06-21 19:23:59,568 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 278 transitions, 2641 flow [2024-06-21 19:23:59,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:59,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:59,569 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 19:23:59,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2024-06-21 19:23:59,569 INFO L420 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:59,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1970892202, now seen corresponding path program 44 times [2024-06-21 19:23:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:59,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938659785] [2024-06-21 19:23:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:59,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:01,241 INFO 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 19:24:01,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938659785] [2024-06-21 19:24:01,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938659785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:01,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:01,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:01,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401350270] [2024-06-21 19:24:01,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:01,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:01,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:01,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:01,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:01,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 278 transitions, 2641 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:01,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:01,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:01,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:01,979 INFO L124 PetriNetUnfolderBase]: 714/1381 cut-off events. [2024-06-21 19:24:01,979 INFO L125 PetriNetUnfolderBase]: For 400291/400291 co-relation queries the response was YES. [2024-06-21 19:24:01,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10541 conditions, 1381 events. 714/1381 cut-off events. For 400291/400291 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7962 event pairs, 123 based on Foata normal form. 8/1387 useless extension candidates. Maximal degree in co-relation 10370. Up to 774 conditions per place. [2024-06-21 19:24:01,997 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 185 selfloop transitions, 106 changer transitions 13/306 dead transitions. [2024-06-21 19:24:01,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 306 transitions, 3639 flow [2024-06-21 19:24:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 157 transitions. [2024-06-21 19:24:01,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604105571847507 [2024-06-21 19:24:01,998 INFO L175 Difference]: Start difference. First operand has 374 places, 278 transitions, 2641 flow. Second operand 11 states and 157 transitions. [2024-06-21 19:24:01,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 306 transitions, 3639 flow [2024-06-21 19:24:02,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 306 transitions, 3464 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 19:24:02,885 INFO L231 Difference]: Finished difference. Result has 369 places, 275 transitions, 2673 flow [2024-06-21 19:24:02,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2673, PETRI_PLACES=369, PETRI_TRANSITIONS=275} [2024-06-21 19:24:02,886 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 339 predicate places. [2024-06-21 19:24:02,886 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 275 transitions, 2673 flow [2024-06-21 19:24:02,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:02,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:02,886 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 19:24:02,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2024-06-21 19:24:02,886 INFO L420 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:02,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:02,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1372321040, now seen corresponding path program 45 times [2024-06-21 19:24:02,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:02,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320391042] [2024-06-21 19:24:02,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:02,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:04,750 INFO 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 19:24:04,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:04,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320391042] [2024-06-21 19:24:04,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320391042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:04,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:04,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:24:04,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52615810] [2024-06-21 19:24:04,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:04,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:24:04,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:24:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:24:04,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:04,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 275 transitions, 2673 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:04,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:04,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:04,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:05,319 INFO L124 PetriNetUnfolderBase]: 701/1358 cut-off events. [2024-06-21 19:24:05,319 INFO L125 PetriNetUnfolderBase]: For 382742/382742 co-relation queries the response was YES. [2024-06-21 19:24:05,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10237 conditions, 1358 events. 701/1358 cut-off events. For 382742/382742 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7818 event pairs, 132 based on Foata normal form. 10/1366 useless extension candidates. Maximal degree in co-relation 10069. Up to 830 conditions per place. [2024-06-21 19:24:05,336 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 176 selfloop transitions, 105 changer transitions 14/297 dead transitions. [2024-06-21 19:24:05,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 297 transitions, 3351 flow [2024-06-21 19:24:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 149 transitions. [2024-06-21 19:24:05,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436950146627566 [2024-06-21 19:24:05,337 INFO L175 Difference]: Start difference. First operand has 369 places, 275 transitions, 2673 flow. Second operand 11 states and 149 transitions. [2024-06-21 19:24:05,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 297 transitions, 3351 flow [2024-06-21 19:24:06,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 297 transitions, 3136 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:06,357 INFO L231 Difference]: Finished difference. Result has 366 places, 272 transitions, 2649 flow [2024-06-21 19:24:06,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2458, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2649, PETRI_PLACES=366, PETRI_TRANSITIONS=272} [2024-06-21 19:24:06,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2024-06-21 19:24:06,361 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 272 transitions, 2649 flow [2024-06-21 19:24:06,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:06,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:06,362 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 19:24:06,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2024-06-21 19:24:06,362 INFO L420 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:06,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1250490014, now seen corresponding path program 46 times [2024-06-21 19:24:06,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:06,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142116543] [2024-06-21 19:24:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:06,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:08,048 INFO 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 19:24:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:08,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142116543] [2024-06-21 19:24:08,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142116543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:08,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:08,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:08,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130076150] [2024-06-21 19:24:08,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:08,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:08,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:08,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:08,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 272 transitions, 2649 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:08,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:08,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:08,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:08,669 INFO L124 PetriNetUnfolderBase]: 689/1338 cut-off events. [2024-06-21 19:24:08,669 INFO L125 PetriNetUnfolderBase]: For 354336/354336 co-relation queries the response was YES. [2024-06-21 19:24:08,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10085 conditions, 1338 events. 689/1338 cut-off events. For 354336/354336 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 7673 event pairs, 118 based on Foata normal form. 8/1344 useless extension candidates. Maximal degree in co-relation 9919. Up to 748 conditions per place. [2024-06-21 19:24:08,684 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 179 selfloop transitions, 102 changer transitions 16/299 dead transitions. [2024-06-21 19:24:08,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 299 transitions, 3611 flow [2024-06-21 19:24:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 154 transitions. [2024-06-21 19:24:08,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 19:24:08,685 INFO L175 Difference]: Start difference. First operand has 366 places, 272 transitions, 2649 flow. Second operand 11 states and 154 transitions. [2024-06-21 19:24:08,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 299 transitions, 3611 flow [2024-06-21 19:24:09,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 299 transitions, 3393 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:09,600 INFO L231 Difference]: Finished difference. Result has 364 places, 268 transitions, 2621 flow [2024-06-21 19:24:09,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2621, PETRI_PLACES=364, PETRI_TRANSITIONS=268} [2024-06-21 19:24:09,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 334 predicate places. [2024-06-21 19:24:09,600 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 268 transitions, 2621 flow [2024-06-21 19:24:09,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:09,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:09,600 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 19:24:09,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2024-06-21 19:24:09,600 INFO L420 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:09,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1254209084, now seen corresponding path program 47 times [2024-06-21 19:24:09,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:09,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961149168] [2024-06-21 19:24:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:09,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:11,348 INFO 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 19:24:11,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:11,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961149168] [2024-06-21 19:24:11,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961149168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:11,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:11,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:11,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171210055] [2024-06-21 19:24:11,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:11,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:11,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:11,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:11,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:11,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:11,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 268 transitions, 2621 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:11,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:11,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:11,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:12,003 INFO L124 PetriNetUnfolderBase]: 653/1266 cut-off events. [2024-06-21 19:24:12,003 INFO L125 PetriNetUnfolderBase]: For 283003/283003 co-relation queries the response was YES. [2024-06-21 19:24:12,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8788 conditions, 1266 events. 653/1266 cut-off events. For 283003/283003 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7184 event pairs, 100 based on Foata normal form. 8/1272 useless extension candidates. Maximal degree in co-relation 8623. Up to 748 conditions per place. [2024-06-21 19:24:12,018 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 166 selfloop transitions, 98 changer transitions 23/289 dead transitions. [2024-06-21 19:24:12,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 289 transitions, 3271 flow [2024-06-21 19:24:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 19:24:12,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 19:24:12,018 INFO L175 Difference]: Start difference. First operand has 364 places, 268 transitions, 2621 flow. Second operand 11 states and 145 transitions. [2024-06-21 19:24:12,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 289 transitions, 3271 flow [2024-06-21 19:24:12,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 289 transitions, 3060 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:12,765 INFO L231 Difference]: Finished difference. Result has 359 places, 260 transitions, 2547 flow [2024-06-21 19:24:12,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2547, PETRI_PLACES=359, PETRI_TRANSITIONS=260} [2024-06-21 19:24:12,765 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 329 predicate places. [2024-06-21 19:24:12,765 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 260 transitions, 2547 flow [2024-06-21 19:24:12,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:12,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:12,765 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 19:24:12,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2024-06-21 19:24:12,765 INFO L420 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:12,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2138846980, now seen corresponding path program 48 times [2024-06-21 19:24:12,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:12,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010092307] [2024-06-21 19:24:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:12,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:14,669 INFO 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 19:24:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010092307] [2024-06-21 19:24:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010092307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:14,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:14,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:24:14,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651743225] [2024-06-21 19:24:14,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:14,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:24:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:24:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:24:14,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:14,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 260 transitions, 2547 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:14,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:14,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:14,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:15,407 INFO L124 PetriNetUnfolderBase]: 639/1240 cut-off events. [2024-06-21 19:24:15,407 INFO L125 PetriNetUnfolderBase]: For 285970/285970 co-relation queries the response was YES. [2024-06-21 19:24:15,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8598 conditions, 1240 events. 639/1240 cut-off events. For 285970/285970 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7049 event pairs, 99 based on Foata normal form. 10/1248 useless extension candidates. Maximal degree in co-relation 8436. Up to 885 conditions per place. [2024-06-21 19:24:15,421 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 196 selfloop transitions, 67 changer transitions 13/278 dead transitions. [2024-06-21 19:24:15,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 278 transitions, 3177 flow [2024-06-21 19:24:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-21 19:24:15,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-21 19:24:15,422 INFO L175 Difference]: Start difference. First operand has 359 places, 260 transitions, 2547 flow. Second operand 11 states and 144 transitions. [2024-06-21 19:24:15,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 278 transitions, 3177 flow [2024-06-21 19:24:16,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 278 transitions, 2954 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 19:24:16,098 INFO L231 Difference]: Finished difference. Result has 346 places, 256 transitions, 2426 flow [2024-06-21 19:24:16,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2426, PETRI_PLACES=346, PETRI_TRANSITIONS=256} [2024-06-21 19:24:16,098 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2024-06-21 19:24:16,098 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 256 transitions, 2426 flow [2024-06-21 19:24:16,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:16,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:16,098 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 19:24:16,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2024-06-21 19:24:16,098 INFO L420 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:16,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1072304940, now seen corresponding path program 49 times [2024-06-21 19:24:16,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:16,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143057960] [2024-06-21 19:24:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:16,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:17,817 INFO 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 19:24:17,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:17,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143057960] [2024-06-21 19:24:17,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143057960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:17,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:17,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:17,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476217676] [2024-06-21 19:24:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:17,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:17,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:17,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:17,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 256 transitions, 2426 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:17,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:17,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:17,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:18,456 INFO L124 PetriNetUnfolderBase]: 629/1226 cut-off events. [2024-06-21 19:24:18,456 INFO L125 PetriNetUnfolderBase]: For 267922/267922 co-relation queries the response was YES. [2024-06-21 19:24:18,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8321 conditions, 1226 events. 629/1226 cut-off events. For 267922/267922 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6978 event pairs, 100 based on Foata normal form. 10/1234 useless extension candidates. Maximal degree in co-relation 8166. Up to 861 conditions per place. [2024-06-21 19:24:18,469 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 190 selfloop transitions, 70 changer transitions 12/274 dead transitions. [2024-06-21 19:24:18,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 274 transitions, 3048 flow [2024-06-21 19:24:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 19:24:18,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 19:24:18,470 INFO L175 Difference]: Start difference. First operand has 346 places, 256 transitions, 2426 flow. Second operand 11 states and 145 transitions. [2024-06-21 19:24:18,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 274 transitions, 3048 flow [2024-06-21 19:24:19,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 274 transitions, 2910 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:19,149 INFO L231 Difference]: Finished difference. Result has 344 places, 253 transitions, 2411 flow [2024-06-21 19:24:19,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2411, PETRI_PLACES=344, PETRI_TRANSITIONS=253} [2024-06-21 19:24:19,149 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 314 predicate places. [2024-06-21 19:24:19,149 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 253 transitions, 2411 flow [2024-06-21 19:24:19,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:19,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:19,150 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 19:24:19,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2024-06-21 19:24:19,150 INFO L420 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:19,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1072310520, now seen corresponding path program 50 times [2024-06-21 19:24:19,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:19,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366284468] [2024-06-21 19:24:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:19,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:20,841 INFO 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 19:24:20,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:20,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366284468] [2024-06-21 19:24:20,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366284468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:20,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:20,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803783315] [2024-06-21 19:24:20,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:20,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:20,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:20,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:20,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 253 transitions, 2411 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:20,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:20,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:20,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:21,451 INFO L124 PetriNetUnfolderBase]: 617/1206 cut-off events. [2024-06-21 19:24:21,451 INFO L125 PetriNetUnfolderBase]: For 248917/248917 co-relation queries the response was YES. [2024-06-21 19:24:21,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8216 conditions, 1206 events. 617/1206 cut-off events. For 248917/248917 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6853 event pairs, 96 based on Foata normal form. 8/1212 useless extension candidates. Maximal degree in co-relation 8062. Up to 851 conditions per place. [2024-06-21 19:24:21,464 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 188 selfloop transitions, 68 changer transitions 12/270 dead transitions. [2024-06-21 19:24:21,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 270 transitions, 3013 flow [2024-06-21 19:24:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 19:24:21,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 19:24:21,465 INFO L175 Difference]: Start difference. First operand has 344 places, 253 transitions, 2411 flow. Second operand 11 states and 142 transitions. [2024-06-21 19:24:21,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 270 transitions, 3013 flow [2024-06-21 19:24:22,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 270 transitions, 2869 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:22,138 INFO L231 Difference]: Finished difference. Result has 342 places, 250 transitions, 2384 flow [2024-06-21 19:24:22,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2384, PETRI_PLACES=342, PETRI_TRANSITIONS=250} [2024-06-21 19:24:22,138 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 312 predicate places. [2024-06-21 19:24:22,138 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 250 transitions, 2384 flow [2024-06-21 19:24:22,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:22,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:22,138 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 19:24:22,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2024-06-21 19:24:22,138 INFO L420 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:22,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:22,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1077817050, now seen corresponding path program 51 times [2024-06-21 19:24:22,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:22,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034626944] [2024-06-21 19:24:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:22,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:23,814 INFO 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 19:24:23,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:23,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034626944] [2024-06-21 19:24:23,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034626944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:23,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:23,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:23,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25614913] [2024-06-21 19:24:23,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:23,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:23,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:23,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:23,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 250 transitions, 2384 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:23,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:23,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:23,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:24,506 INFO L124 PetriNetUnfolderBase]: 639/1252 cut-off events. [2024-06-21 19:24:24,506 INFO L125 PetriNetUnfolderBase]: For 316311/316311 co-relation queries the response was YES. [2024-06-21 19:24:24,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9537 conditions, 1252 events. 639/1252 cut-off events. For 316311/316311 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7140 event pairs, 107 based on Foata normal form. 8/1258 useless extension candidates. Maximal degree in co-relation 9384. Up to 805 conditions per place. [2024-06-21 19:24:24,520 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 192 selfloop transitions, 69 changer transitions 11/274 dead transitions. [2024-06-21 19:24:24,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 274 transitions, 3278 flow [2024-06-21 19:24:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-21 19:24:24,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44574780058651026 [2024-06-21 19:24:24,521 INFO L175 Difference]: Start difference. First operand has 342 places, 250 transitions, 2384 flow. Second operand 11 states and 152 transitions. [2024-06-21 19:24:24,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 274 transitions, 3278 flow [2024-06-21 19:24:25,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 274 transitions, 3130 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:25,201 INFO L231 Difference]: Finished difference. Result has 338 places, 247 transitions, 2367 flow [2024-06-21 19:24:25,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2367, PETRI_PLACES=338, PETRI_TRANSITIONS=247} [2024-06-21 19:24:25,201 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2024-06-21 19:24:25,201 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 247 transitions, 2367 flow [2024-06-21 19:24:25,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:25,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:25,201 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 19:24:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2024-06-21 19:24:25,202 INFO L420 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:25,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1077667320, now seen corresponding path program 52 times [2024-06-21 19:24:25,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:25,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716452543] [2024-06-21 19:24:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:25,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:27,048 INFO 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 19:24:27,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:27,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716452543] [2024-06-21 19:24:27,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716452543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:27,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:27,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:24:27,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596943859] [2024-06-21 19:24:27,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:27,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:24:27,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:24:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:24:27,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:27,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 247 transitions, 2367 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:27,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:27,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:27,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:27,686 INFO L124 PetriNetUnfolderBase]: 626/1229 cut-off events. [2024-06-21 19:24:27,686 INFO L125 PetriNetUnfolderBase]: For 305898/305898 co-relation queries the response was YES. [2024-06-21 19:24:27,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9159 conditions, 1229 events. 626/1229 cut-off events. For 305898/305898 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 6976 event pairs, 116 based on Foata normal form. 10/1237 useless extension candidates. Maximal degree in co-relation 9008. Up to 861 conditions per place. [2024-06-21 19:24:27,699 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 183 selfloop transitions, 68 changer transitions 12/265 dead transitions. [2024-06-21 19:24:27,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 265 transitions, 2971 flow [2024-06-21 19:24:27,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-21 19:24:27,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-21 19:24:27,700 INFO L175 Difference]: Start difference. First operand has 338 places, 247 transitions, 2367 flow. Second operand 11 states and 144 transitions. [2024-06-21 19:24:27,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 265 transitions, 2971 flow [2024-06-21 19:24:28,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 265 transitions, 2830 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:28,491 INFO L231 Difference]: Finished difference. Result has 335 places, 244 transitions, 2343 flow [2024-06-21 19:24:28,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2343, PETRI_PLACES=335, PETRI_TRANSITIONS=244} [2024-06-21 19:24:28,492 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2024-06-21 19:24:28,492 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 244 transitions, 2343 flow [2024-06-21 19:24:28,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:28,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:28,492 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 19:24:28,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2024-06-21 19:24:28,492 INFO L420 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:28,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1077672900, now seen corresponding path program 53 times [2024-06-21 19:24:28,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:28,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350111877] [2024-06-21 19:24:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:30,199 INFO 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 19:24:30,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:30,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350111877] [2024-06-21 19:24:30,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350111877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:30,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:30,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:30,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756662585] [2024-06-21 19:24:30,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:30,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:30,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:30,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:30,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:30,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 244 transitions, 2343 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:30,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:30,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:30,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:30,836 INFO L124 PetriNetUnfolderBase]: 592/1163 cut-off events. [2024-06-21 19:24:30,836 INFO L125 PetriNetUnfolderBase]: For 228858/228858 co-relation queries the response was YES. [2024-06-21 19:24:30,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7927 conditions, 1163 events. 592/1163 cut-off events. For 228858/228858 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6558 event pairs, 94 based on Foata normal form. 8/1169 useless extension candidates. Maximal degree in co-relation 7778. Up to 805 conditions per place. [2024-06-21 19:24:30,848 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 180 selfloop transitions, 65 changer transitions 14/261 dead transitions. [2024-06-21 19:24:30,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 261 transitions, 2927 flow [2024-06-21 19:24:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 19:24:30,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 19:24:30,849 INFO L175 Difference]: Start difference. First operand has 335 places, 244 transitions, 2343 flow. Second operand 11 states and 141 transitions. [2024-06-21 19:24:30,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 261 transitions, 2927 flow [2024-06-21 19:24:31,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 261 transitions, 2787 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:31,526 INFO L231 Difference]: Finished difference. Result has 333 places, 240 transitions, 2308 flow [2024-06-21 19:24:31,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2308, PETRI_PLACES=333, PETRI_TRANSITIONS=240} [2024-06-21 19:24:31,526 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 303 predicate places. [2024-06-21 19:24:31,527 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 240 transitions, 2308 flow [2024-06-21 19:24:31,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:31,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:31,527 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 19:24:31,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2024-06-21 19:24:31,527 INFO L420 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:31,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1216201050, now seen corresponding path program 54 times [2024-06-21 19:24:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:31,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968907307] [2024-06-21 19:24:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:31,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:33,378 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 19:24:33,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:33,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968907307] [2024-06-21 19:24:33,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968907307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:33,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:33,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:24:33,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099511228] [2024-06-21 19:24:33,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:33,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:24:33,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:33,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:24:33,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:24:33,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:33,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 240 transitions, 2308 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:33,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:33,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:33,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:34,141 INFO L124 PetriNetUnfolderBase]: 613/1206 cut-off events. [2024-06-21 19:24:34,141 INFO L125 PetriNetUnfolderBase]: For 290597/290597 co-relation queries the response was YES. [2024-06-21 19:24:34,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9184 conditions, 1206 events. 613/1206 cut-off events. For 290597/290597 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6795 event pairs, 107 based on Foata normal form. 8/1212 useless extension candidates. Maximal degree in co-relation 9036. Up to 774 conditions per place. [2024-06-21 19:24:34,154 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 184 selfloop transitions, 69 changer transitions 8/263 dead transitions. [2024-06-21 19:24:34,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 263 transitions, 3168 flow [2024-06-21 19:24:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 150 transitions. [2024-06-21 19:24:34,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398826979472141 [2024-06-21 19:24:34,154 INFO L175 Difference]: Start difference. First operand has 333 places, 240 transitions, 2308 flow. Second operand 11 states and 150 transitions. [2024-06-21 19:24:34,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 263 transitions, 3168 flow [2024-06-21 19:24:35,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 263 transitions, 3022 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:35,078 INFO L231 Difference]: Finished difference. Result has 326 places, 238 transitions, 2299 flow [2024-06-21 19:24:35,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2299, PETRI_PLACES=326, PETRI_TRANSITIONS=238} [2024-06-21 19:24:35,078 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 296 predicate places. [2024-06-21 19:24:35,078 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 238 transitions, 2299 flow [2024-06-21 19:24:35,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:35,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:35,079 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 19:24:35,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2024-06-21 19:24:35,079 INFO L420 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:35,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1216195470, now seen corresponding path program 55 times [2024-06-21 19:24:35,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:35,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548067790] [2024-06-21 19:24:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:35,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:36,848 INFO 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 19:24:36,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548067790] [2024-06-21 19:24:36,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548067790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:36,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:36,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:36,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138065243] [2024-06-21 19:24:36,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:36,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:36,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:36,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:36,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:36,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:36,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 238 transitions, 2299 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:36,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:36,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:36,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:37,447 INFO L124 PetriNetUnfolderBase]: 582/1145 cut-off events. [2024-06-21 19:24:37,447 INFO L125 PetriNetUnfolderBase]: For 226064/226064 co-relation queries the response was YES. [2024-06-21 19:24:37,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7759 conditions, 1145 events. 582/1145 cut-off events. For 226064/226064 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6408 event pairs, 98 based on Foata normal form. 10/1153 useless extension candidates. Maximal degree in co-relation 7614. Up to 774 conditions per place. [2024-06-21 19:24:37,458 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 174 selfloop transitions, 66 changer transitions 14/256 dead transitions. [2024-06-21 19:24:37,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 256 transitions, 2885 flow [2024-06-21 19:24:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-21 19:24:37,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-21 19:24:37,459 INFO L175 Difference]: Start difference. First operand has 326 places, 238 transitions, 2299 flow. Second operand 11 states and 144 transitions. [2024-06-21 19:24:37,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 256 transitions, 2885 flow [2024-06-21 19:24:38,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 256 transitions, 2745 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:38,115 INFO L231 Difference]: Finished difference. Result has 325 places, 234 transitions, 2268 flow [2024-06-21 19:24:38,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2268, PETRI_PLACES=325, PETRI_TRANSITIONS=234} [2024-06-21 19:24:38,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2024-06-21 19:24:38,116 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 234 transitions, 2268 flow [2024-06-21 19:24:38,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:38,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:38,116 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 19:24:38,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2024-06-21 19:24:38,116 INFO L420 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:38,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1216345200, now seen corresponding path program 56 times [2024-06-21 19:24:38,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:38,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516595268] [2024-06-21 19:24:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:38,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:39,874 INFO 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 19:24:39,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:39,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516595268] [2024-06-21 19:24:39,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516595268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:39,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:39,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:39,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075847294] [2024-06-21 19:24:39,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:39,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:39,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:39,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:39,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:40,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:40,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 234 transitions, 2268 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:40,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:40,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:40,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:40,483 INFO L124 PetriNetUnfolderBase]: 569/1122 cut-off events. [2024-06-21 19:24:40,483 INFO L125 PetriNetUnfolderBase]: For 209671/209671 co-relation queries the response was YES. [2024-06-21 19:24:40,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7636 conditions, 1122 events. 569/1122 cut-off events. For 209671/209671 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6277 event pairs, 92 based on Foata normal form. 8/1128 useless extension candidates. Maximal degree in co-relation 7492. Up to 756 conditions per place. [2024-06-21 19:24:40,495 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 171 selfloop transitions, 64 changer transitions 15/252 dead transitions. [2024-06-21 19:24:40,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 252 transitions, 2836 flow [2024-06-21 19:24:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 19:24:40,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 19:24:40,495 INFO L175 Difference]: Start difference. First operand has 325 places, 234 transitions, 2268 flow. Second operand 11 states and 142 transitions. [2024-06-21 19:24:40,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 252 transitions, 2836 flow [2024-06-21 19:24:41,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 252 transitions, 2698 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:41,141 INFO L231 Difference]: Finished difference. Result has 320 places, 230 transitions, 2240 flow [2024-06-21 19:24:41,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2240, PETRI_PLACES=320, PETRI_TRANSITIONS=230} [2024-06-21 19:24:41,142 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-06-21 19:24:41,142 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 230 transitions, 2240 flow [2024-06-21 19:24:41,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:41,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:41,142 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 19:24:41,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2024-06-21 19:24:41,142 INFO L420 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:41,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1219920120, now seen corresponding path program 57 times [2024-06-21 19:24:41,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:41,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101839221] [2024-06-21 19:24:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:42,824 INFO 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 19:24:42,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:42,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101839221] [2024-06-21 19:24:42,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101839221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:42,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:42,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979420012] [2024-06-21 19:24:42,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:42,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:42,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:42,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:42,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:42,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 230 transitions, 2240 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:42,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:42,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:42,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:43,415 INFO L124 PetriNetUnfolderBase]: 558/1101 cut-off events. [2024-06-21 19:24:43,418 INFO L125 PetriNetUnfolderBase]: For 202229/202229 co-relation queries the response was YES. [2024-06-21 19:24:43,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7518 conditions, 1101 events. 558/1101 cut-off events. For 202229/202229 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 6099 event pairs, 88 based on Foata normal form. 8/1107 useless extension candidates. Maximal degree in co-relation 7376. Up to 730 conditions per place. [2024-06-21 19:24:43,429 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 167 selfloop transitions, 62 changer transitions 18/249 dead transitions. [2024-06-21 19:24:43,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 249 transitions, 2804 flow [2024-06-21 19:24:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 19:24:43,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 19:24:43,430 INFO L175 Difference]: Start difference. First operand has 320 places, 230 transitions, 2240 flow. Second operand 11 states and 142 transitions. [2024-06-21 19:24:43,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 249 transitions, 2804 flow [2024-06-21 19:24:43,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 249 transitions, 2668 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:43,982 INFO L231 Difference]: Finished difference. Result has 314 places, 225 transitions, 2199 flow [2024-06-21 19:24:43,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2199, PETRI_PLACES=314, PETRI_TRANSITIONS=225} [2024-06-21 19:24:43,983 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2024-06-21 19:24:43,983 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 225 transitions, 2199 flow [2024-06-21 19:24:43,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:43,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:43,983 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 19:24:43,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2024-06-21 19:24:43,983 INFO L420 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:43,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash 469078094, now seen corresponding path program 58 times [2024-06-21 19:24:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:43,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658288030] [2024-06-21 19:24:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:43,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:45,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:45,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658288030] [2024-06-21 19:24:45,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658288030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:45,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:45,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:45,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644962301] [2024-06-21 19:24:45,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:45,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:45,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:45,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:45,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 225 transitions, 2199 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:45,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:45,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:45,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:46,186 INFO L124 PetriNetUnfolderBase]: 543/1072 cut-off events. [2024-06-21 19:24:46,186 INFO L125 PetriNetUnfolderBase]: For 191213/191213 co-relation queries the response was YES. [2024-06-21 19:24:46,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7347 conditions, 1072 events. 543/1072 cut-off events. For 191213/191213 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5901 event pairs, 70 based on Foata normal form. 8/1078 useless extension candidates. Maximal degree in co-relation 7208. Up to 367 conditions per place. [2024-06-21 19:24:46,199 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 133 selfloop transitions, 102 changer transitions 15/252 dead transitions. [2024-06-21 19:24:46,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 252 transitions, 3025 flow [2024-06-21 19:24:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-21 19:24:46,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44574780058651026 [2024-06-21 19:24:46,200 INFO L175 Difference]: Start difference. First operand has 314 places, 225 transitions, 2199 flow. Second operand 11 states and 152 transitions. [2024-06-21 19:24:46,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 252 transitions, 3025 flow [2024-06-21 19:24:46,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 252 transitions, 2881 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:46,715 INFO L231 Difference]: Finished difference. Result has 306 places, 221 transitions, 2251 flow [2024-06-21 19:24:46,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2251, PETRI_PLACES=306, PETRI_TRANSITIONS=221} [2024-06-21 19:24:46,715 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2024-06-21 19:24:46,715 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 221 transitions, 2251 flow [2024-06-21 19:24:46,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:46,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:46,716 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 19:24:46,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2024-06-21 19:24:46,716 INFO L420 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:46,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2079316702, now seen corresponding path program 59 times [2024-06-21 19:24:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:46,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196860548] [2024-06-21 19:24:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:48,534 INFO 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 19:24:48,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:48,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196860548] [2024-06-21 19:24:48,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196860548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:48,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:48,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:24:48,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140709902] [2024-06-21 19:24:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:48,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:24:48,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:48,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:24:48,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:24:48,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:48,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 221 transitions, 2251 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:48,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:48,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:48,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:49,044 INFO L124 PetriNetUnfolderBase]: 529/1044 cut-off events. [2024-06-21 19:24:49,044 INFO L125 PetriNetUnfolderBase]: For 187676/187676 co-relation queries the response was YES. [2024-06-21 19:24:49,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7261 conditions, 1044 events. 529/1044 cut-off events. For 187676/187676 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5696 event pairs, 81 based on Foata normal form. 10/1052 useless extension candidates. Maximal degree in co-relation 7126. Up to 582 conditions per place. [2024-06-21 19:24:49,054 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 119 selfloop transitions, 109 changer transitions 12/242 dead transitions. [2024-06-21 19:24:49,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 242 transitions, 2819 flow [2024-06-21 19:24:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 150 transitions. [2024-06-21 19:24:49,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398826979472141 [2024-06-21 19:24:49,055 INFO L175 Difference]: Start difference. First operand has 306 places, 221 transitions, 2251 flow. Second operand 11 states and 150 transitions. [2024-06-21 19:24:49,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 242 transitions, 2819 flow [2024-06-21 19:24:49,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 242 transitions, 2636 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:49,505 INFO L231 Difference]: Finished difference. Result has 301 places, 218 transitions, 2267 flow [2024-06-21 19:24:49,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2267, PETRI_PLACES=301, PETRI_TRANSITIONS=218} [2024-06-21 19:24:49,505 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-21 19:24:49,505 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 218 transitions, 2267 flow [2024-06-21 19:24:49,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:49,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:49,505 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 19:24:49,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2024-06-21 19:24:49,505 INFO L420 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:49,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2079166972, now seen corresponding path program 60 times [2024-06-21 19:24:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008890074] [2024-06-21 19:24:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:51,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:51,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008890074] [2024-06-21 19:24:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008890074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:51,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:51,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:51,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424971909] [2024-06-21 19:24:51,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:51,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:51,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:51,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:51,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:51,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:51,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 218 transitions, 2267 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:51,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:51,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:51,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:51,764 INFO L124 PetriNetUnfolderBase]: 539/1070 cut-off events. [2024-06-21 19:24:51,765 INFO L125 PetriNetUnfolderBase]: For 205787/205787 co-relation queries the response was YES. [2024-06-21 19:24:51,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8128 conditions, 1070 events. 539/1070 cut-off events. For 205787/205787 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5887 event pairs, 87 based on Foata normal form. 8/1076 useless extension candidates. Maximal degree in co-relation 7996. Up to 554 conditions per place. [2024-06-21 19:24:51,773 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 123 selfloop transitions, 107 changer transitions 11/243 dead transitions. [2024-06-21 19:24:51,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 243 transitions, 3053 flow [2024-06-21 19:24:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 153 transitions. [2024-06-21 19:24:51,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44868035190615835 [2024-06-21 19:24:51,774 INFO L175 Difference]: Start difference. First operand has 301 places, 218 transitions, 2267 flow. Second operand 11 states and 153 transitions. [2024-06-21 19:24:51,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 243 transitions, 3053 flow [2024-06-21 19:24:52,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 243 transitions, 2827 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:52,154 INFO L231 Difference]: Finished difference. Result has 299 places, 215 transitions, 2245 flow [2024-06-21 19:24:52,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2245, PETRI_PLACES=299, PETRI_TRANSITIONS=215} [2024-06-21 19:24:52,154 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 269 predicate places. [2024-06-21 19:24:52,154 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 215 transitions, 2245 flow [2024-06-21 19:24:52,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:52,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:52,154 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 19:24:52,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2024-06-21 19:24:52,154 INFO L420 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:52,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2079311122, now seen corresponding path program 61 times [2024-06-21 19:24:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837965912] [2024-06-21 19:24:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:52,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:53,889 INFO 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 19:24:53,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:53,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837965912] [2024-06-21 19:24:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837965912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:53,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:53,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:24:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755835863] [2024-06-21 19:24:53,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:24:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:24:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:24:54,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:24:54,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 215 transitions, 2245 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:54,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:54,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:24:54,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:54,567 INFO L124 PetriNetUnfolderBase]: 507/1006 cut-off events. [2024-06-21 19:24:54,567 INFO L125 PetriNetUnfolderBase]: For 164106/164106 co-relation queries the response was YES. [2024-06-21 19:24:54,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7099 conditions, 1006 events. 507/1006 cut-off events. For 164106/164106 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5450 event pairs, 69 based on Foata normal form. 8/1012 useless extension candidates. Maximal degree in co-relation 6968. Up to 554 conditions per place. [2024-06-21 19:24:54,575 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 114 selfloop transitions, 104 changer transitions 15/235 dead transitions. [2024-06-21 19:24:54,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 235 transitions, 2787 flow [2024-06-21 19:24:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 19:24:54,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 19:24:54,576 INFO L175 Difference]: Start difference. First operand has 299 places, 215 transitions, 2245 flow. Second operand 11 states and 146 transitions. [2024-06-21 19:24:54,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 235 transitions, 2787 flow [2024-06-21 19:24:54,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 235 transitions, 2568 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:54,962 INFO L231 Difference]: Finished difference. Result has 296 places, 210 transitions, 2201 flow [2024-06-21 19:24:54,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2201, PETRI_PLACES=296, PETRI_TRANSITIONS=210} [2024-06-21 19:24:54,962 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-21 19:24:54,962 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 210 transitions, 2201 flow [2024-06-21 19:24:54,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:54,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:54,963 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 19:24:54,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2024-06-21 19:24:54,963 INFO L420 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:54,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2071558254, now seen corresponding path program 62 times [2024-06-21 19:24:54,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:54,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618300534] [2024-06-21 19:24:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:54,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:56,777 INFO 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 19:24:56,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:56,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618300534] [2024-06-21 19:24:56,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618300534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:56,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:56,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:56,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742054758] [2024-06-21 19:24:56,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:56,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:56,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:56,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:56,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:56,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 210 transitions, 2201 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:56,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:56,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:56,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:57,663 INFO L124 PetriNetUnfolderBase]: 500/990 cut-off events. [2024-06-21 19:24:57,663 INFO L125 PetriNetUnfolderBase]: For 166804/166804 co-relation queries the response was YES. [2024-06-21 19:24:57,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6976 conditions, 990 events. 500/990 cut-off events. For 166804/166804 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5343 event pairs, 78 based on Foata normal form. 10/998 useless extension candidates. Maximal degree in co-relation 6847. Up to 635 conditions per place. [2024-06-21 19:24:57,672 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 139 selfloop transitions, 76 changer transitions 12/229 dead transitions. [2024-06-21 19:24:57,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 229 transitions, 2733 flow [2024-06-21 19:24:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 19:24:57,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 19:24:57,673 INFO L175 Difference]: Start difference. First operand has 296 places, 210 transitions, 2201 flow. Second operand 11 states and 134 transitions. [2024-06-21 19:24:57,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 229 transitions, 2733 flow [2024-06-21 19:24:58,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 229 transitions, 2511 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 19:24:58,048 INFO L231 Difference]: Finished difference. Result has 287 places, 206 transitions, 2096 flow [2024-06-21 19:24:58,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2096, PETRI_PLACES=287, PETRI_TRANSITIONS=206} [2024-06-21 19:24:58,048 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2024-06-21 19:24:58,048 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 206 transitions, 2096 flow [2024-06-21 19:24:58,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:58,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:58,048 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 19:24:58,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2024-06-21 19:24:58,048 INFO L420 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:58,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2071550318, now seen corresponding path program 14 times [2024-06-21 19:24:58,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:58,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687015048] [2024-06-21 19:24:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:58,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:00,729 INFO 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 19:25:00,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687015048] [2024-06-21 19:25:00,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687015048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:00,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:00,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994937146] [2024-06-21 19:25:00,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:00,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:00,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:00,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:00,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:00,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:00,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 206 transitions, 2096 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:00,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:00,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:00,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:01,558 INFO L124 PetriNetUnfolderBase]: 478/948 cut-off events. [2024-06-21 19:25:01,558 INFO L125 PetriNetUnfolderBase]: For 119911/119911 co-relation queries the response was YES. [2024-06-21 19:25:01,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6660 conditions, 948 events. 478/948 cut-off events. For 119911/119911 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5079 event pairs, 73 based on Foata normal form. 2/948 useless extension candidates. Maximal degree in co-relation 6535. Up to 695 conditions per place. [2024-06-21 19:25:01,567 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 170 selfloop transitions, 51 changer transitions 0/223 dead transitions. [2024-06-21 19:25:01,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 223 transitions, 2610 flow [2024-06-21 19:25:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:25:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:25:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 155 transitions. [2024-06-21 19:25:01,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 19:25:01,568 INFO L175 Difference]: Start difference. First operand has 287 places, 206 transitions, 2096 flow. Second operand 14 states and 155 transitions. [2024-06-21 19:25:01,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 223 transitions, 2610 flow [2024-06-21 19:25:01,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 223 transitions, 2454 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:01,840 INFO L231 Difference]: Finished difference. Result has 288 places, 207 transitions, 2082 flow [2024-06-21 19:25:01,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2082, PETRI_PLACES=288, PETRI_TRANSITIONS=207} [2024-06-21 19:25:01,841 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-21 19:25:01,841 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 207 transitions, 2082 flow [2024-06-21 19:25:01,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:01,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:01,841 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 19:25:01,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2024-06-21 19:25:01,841 INFO L420 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:01,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2077128024, now seen corresponding path program 63 times [2024-06-21 19:25:01,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:01,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895805814] [2024-06-21 19:25:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:01,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:03,418 INFO 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 19:25:03,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:03,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895805814] [2024-06-21 19:25:03,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895805814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:03,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:03,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:03,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514694150] [2024-06-21 19:25:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:03,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:03,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:03,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 207 transitions, 2082 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:03,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:03,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:03,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:04,051 INFO L124 PetriNetUnfolderBase]: 519/1035 cut-off events. [2024-06-21 19:25:04,052 INFO L125 PetriNetUnfolderBase]: For 182904/182904 co-relation queries the response was YES. [2024-06-21 19:25:04,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7804 conditions, 1035 events. 519/1035 cut-off events. For 182904/182904 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5647 event pairs, 88 based on Foata normal form. 8/1041 useless extension candidates. Maximal degree in co-relation 7680. Up to 597 conditions per place. [2024-06-21 19:25:04,061 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 139 selfloop transitions, 84 changer transitions 7/232 dead transitions. [2024-06-21 19:25:04,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 232 transitions, 2838 flow [2024-06-21 19:25:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 156 transitions. [2024-06-21 19:25:04,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574780058651026 [2024-06-21 19:25:04,061 INFO L175 Difference]: Start difference. First operand has 288 places, 207 transitions, 2082 flow. Second operand 11 states and 156 transitions. [2024-06-21 19:25:04,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 232 transitions, 2838 flow [2024-06-21 19:25:04,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 232 transitions, 2699 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-21 19:25:04,440 INFO L231 Difference]: Finished difference. Result has 288 places, 205 transitions, 2104 flow [2024-06-21 19:25:04,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2104, PETRI_PLACES=288, PETRI_TRANSITIONS=205} [2024-06-21 19:25:04,440 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-21 19:25:04,440 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 205 transitions, 2104 flow [2024-06-21 19:25:04,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:04,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:04,441 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 19:25:04,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2024-06-21 19:25:04,441 INFO L420 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:04,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1019546350, now seen corresponding path program 64 times [2024-06-21 19:25:04,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:04,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876720169] [2024-06-21 19:25:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:04,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:06,051 INFO 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 19:25:06,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:06,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876720169] [2024-06-21 19:25:06,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876720169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:06,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:06,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:06,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830862819] [2024-06-21 19:25:06,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:06,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:06,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:06,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:06,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 205 transitions, 2104 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:06,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:06,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:06,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:06,702 INFO L124 PetriNetUnfolderBase]: 542/1084 cut-off events. [2024-06-21 19:25:06,703 INFO L125 PetriNetUnfolderBase]: For 228421/228421 co-relation queries the response was YES. [2024-06-21 19:25:06,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8911 conditions, 1084 events. 542/1084 cut-off events. For 228421/228421 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6004 event pairs, 103 based on Foata normal form. 8/1090 useless extension candidates. Maximal degree in co-relation 8786. Up to 630 conditions per place. [2024-06-21 19:25:06,713 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 146 selfloop transitions, 71 changer transitions 7/226 dead transitions. [2024-06-21 19:25:06,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 226 transitions, 2828 flow [2024-06-21 19:25:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 149 transitions. [2024-06-21 19:25:06,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436950146627566 [2024-06-21 19:25:06,714 INFO L175 Difference]: Start difference. First operand has 288 places, 205 transitions, 2104 flow. Second operand 11 states and 149 transitions. [2024-06-21 19:25:06,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 226 transitions, 2828 flow [2024-06-21 19:25:07,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 226 transitions, 2654 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:07,205 INFO L231 Difference]: Finished difference. Result has 287 places, 203 transitions, 2066 flow [2024-06-21 19:25:07,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2066, PETRI_PLACES=287, PETRI_TRANSITIONS=203} [2024-06-21 19:25:07,205 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2024-06-21 19:25:07,205 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 203 transitions, 2066 flow [2024-06-21 19:25:07,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:07,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:07,205 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 19:25:07,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2024-06-21 19:25:07,206 INFO L420 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:07,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2077122444, now seen corresponding path program 65 times [2024-06-21 19:25:07,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:07,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281447894] [2024-06-21 19:25:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:07,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:08,940 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 19:25:08,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:08,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281447894] [2024-06-21 19:25:08,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281447894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:08,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:08,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:25:08,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098079316] [2024-06-21 19:25:08,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:08,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:25:08,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:25:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:25:09,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:09,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 203 transitions, 2066 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:09,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:09,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:09,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:09,637 INFO L124 PetriNetUnfolderBase]: 511/1023 cut-off events. [2024-06-21 19:25:09,637 INFO L125 PetriNetUnfolderBase]: For 190691/190691 co-relation queries the response was YES. [2024-06-21 19:25:09,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7742 conditions, 1023 events. 511/1023 cut-off events. For 190691/190691 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5583 event pairs, 98 based on Foata normal form. 10/1031 useless extension candidates. Maximal degree in co-relation 7618. Up to 646 conditions per place. [2024-06-21 19:25:09,646 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 127 selfloop transitions, 81 changer transitions 13/223 dead transitions. [2024-06-21 19:25:09,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 223 transitions, 2589 flow [2024-06-21 19:25:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 150 transitions. [2024-06-21 19:25:09,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4398826979472141 [2024-06-21 19:25:09,647 INFO L175 Difference]: Start difference. First operand has 287 places, 203 transitions, 2066 flow. Second operand 11 states and 150 transitions. [2024-06-21 19:25:09,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 223 transitions, 2589 flow [2024-06-21 19:25:10,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 223 transitions, 2449 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:10,037 INFO L231 Difference]: Finished difference. Result has 286 places, 199 transitions, 2063 flow [2024-06-21 19:25:10,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2063, PETRI_PLACES=286, PETRI_TRANSITIONS=199} [2024-06-21 19:25:10,038 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2024-06-21 19:25:10,038 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 199 transitions, 2063 flow [2024-06-21 19:25:10,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:10,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:10,038 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 19:25:10,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2024-06-21 19:25:10,038 INFO L420 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:10,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:10,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2077272174, now seen corresponding path program 66 times [2024-06-21 19:25:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:10,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523802929] [2024-06-21 19:25:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:10,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:11,757 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 19:25:11,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:11,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523802929] [2024-06-21 19:25:11,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523802929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:11,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:11,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:25:11,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173094004] [2024-06-21 19:25:11,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:11,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:25:11,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:11,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:25:11,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:25:11,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:11,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 199 transitions, 2063 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:11,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:11,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:11,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:12,404 INFO L124 PetriNetUnfolderBase]: 527/1059 cut-off events. [2024-06-21 19:25:12,404 INFO L125 PetriNetUnfolderBase]: For 218614/218614 co-relation queries the response was YES. [2024-06-21 19:25:12,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8727 conditions, 1059 events. 527/1059 cut-off events. For 218614/218614 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5831 event pairs, 105 based on Foata normal form. 8/1065 useless extension candidates. Maximal degree in co-relation 8604. Up to 612 conditions per place. [2024-06-21 19:25:12,414 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 132 selfloop transitions, 79 changer transitions 11/224 dead transitions. [2024-06-21 19:25:12,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 224 transitions, 2794 flow [2024-06-21 19:25:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 154 transitions. [2024-06-21 19:25:12,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-21 19:25:12,414 INFO L175 Difference]: Start difference. First operand has 286 places, 199 transitions, 2063 flow. Second operand 11 states and 154 transitions. [2024-06-21 19:25:12,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 224 transitions, 2794 flow [2024-06-21 19:25:12,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 224 transitions, 2620 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:12,844 INFO L231 Difference]: Finished difference. Result has 281 places, 195 transitions, 2031 flow [2024-06-21 19:25:12,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2031, PETRI_PLACES=281, PETRI_TRANSITIONS=195} [2024-06-21 19:25:12,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 251 predicate places. [2024-06-21 19:25:12,845 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 195 transitions, 2031 flow [2024-06-21 19:25:12,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:12,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:12,845 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 19:25:12,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278 [2024-06-21 19:25:12,845 INFO L420 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:12,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2071760064, now seen corresponding path program 67 times [2024-06-21 19:25:12,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:12,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981652944] [2024-06-21 19:25:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:12,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:14,637 INFO 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 19:25:14,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:14,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981652944] [2024-06-21 19:25:14,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981652944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:14,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:14,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:14,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907870934] [2024-06-21 19:25:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:14,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:14,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 195 transitions, 2031 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:14,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:14,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:14,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:15,360 INFO L124 PetriNetUnfolderBase]: 513/1033 cut-off events. [2024-06-21 19:25:15,360 INFO L125 PetriNetUnfolderBase]: For 209054/209054 co-relation queries the response was YES. [2024-06-21 19:25:15,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8373 conditions, 1033 events. 513/1033 cut-off events. For 209054/209054 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5662 event pairs, 114 based on Foata normal form. 10/1041 useless extension candidates. Maximal degree in co-relation 8252. Up to 668 conditions per place. [2024-06-21 19:25:15,369 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 122 selfloop transitions, 79 changer transitions 11/214 dead transitions. [2024-06-21 19:25:15,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 214 transitions, 2530 flow [2024-06-21 19:25:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 19:25:15,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 19:25:15,369 INFO L175 Difference]: Start difference. First operand has 281 places, 195 transitions, 2031 flow. Second operand 11 states and 146 transitions. [2024-06-21 19:25:15,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 214 transitions, 2530 flow [2024-06-21 19:25:15,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 214 transitions, 2367 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 19:25:15,782 INFO L231 Difference]: Finished difference. Result has 276 places, 192 transitions, 2005 flow [2024-06-21 19:25:15,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2005, PETRI_PLACES=276, PETRI_TRANSITIONS=192} [2024-06-21 19:25:15,782 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2024-06-21 19:25:15,782 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 192 transitions, 2005 flow [2024-06-21 19:25:15,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:15,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:15,783 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 19:25:15,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279 [2024-06-21 19:25:15,783 INFO L420 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:15,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1019540770, now seen corresponding path program 68 times [2024-06-21 19:25:15,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:15,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527359139] [2024-06-21 19:25:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:15,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:17,591 INFO 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 19:25:17,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:17,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527359139] [2024-06-21 19:25:17,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527359139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:17,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:17,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:17,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063288688] [2024-06-21 19:25:17,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:17,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:17,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:17,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:17,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:17,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:17,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 192 transitions, 2005 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:17,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:17,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:17,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:18,230 INFO L124 PetriNetUnfolderBase]: 505/1021 cut-off events. [2024-06-21 19:25:18,230 INFO L125 PetriNetUnfolderBase]: For 195150/195150 co-relation queries the response was YES. [2024-06-21 19:25:18,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8180 conditions, 1021 events. 505/1021 cut-off events. For 195150/195150 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5593 event pairs, 104 based on Foata normal form. 10/1029 useless extension candidates. Maximal degree in co-relation 8062. Up to 640 conditions per place. [2024-06-21 19:25:18,239 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 67 changer transitions 12/209 dead transitions. [2024-06-21 19:25:18,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 209 transitions, 2487 flow [2024-06-21 19:25:18,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 19:25:18,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 19:25:18,240 INFO L175 Difference]: Start difference. First operand has 276 places, 192 transitions, 2005 flow. Second operand 11 states and 146 transitions. [2024-06-21 19:25:18,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 209 transitions, 2487 flow [2024-06-21 19:25:18,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 209 transitions, 2325 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:18,599 INFO L231 Difference]: Finished difference. Result has 274 places, 188 transitions, 1947 flow [2024-06-21 19:25:18,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1843, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1947, PETRI_PLACES=274, PETRI_TRANSITIONS=188} [2024-06-21 19:25:18,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2024-06-21 19:25:18,600 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 188 transitions, 1947 flow [2024-06-21 19:25:18,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:18,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:18,600 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 19:25:18,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280 [2024-06-21 19:25:18,600 INFO L420 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:18,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2071765644, now seen corresponding path program 69 times [2024-06-21 19:25:18,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:18,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683024578] [2024-06-21 19:25:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:18,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:20,168 INFO 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 19:25:20,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:20,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683024578] [2024-06-21 19:25:20,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683024578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:20,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:20,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:20,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952637063] [2024-06-21 19:25:20,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:20,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:20,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:20,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:20,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 188 transitions, 1947 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:20,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:20,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:20,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:20,711 INFO L124 PetriNetUnfolderBase]: 470/952 cut-off events. [2024-06-21 19:25:20,711 INFO L125 PetriNetUnfolderBase]: For 155566/155566 co-relation queries the response was YES. [2024-06-21 19:25:20,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7197 conditions, 952 events. 470/952 cut-off events. For 155566/155566 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5110 event pairs, 92 based on Foata normal form. 8/958 useless extension candidates. Maximal degree in co-relation 7080. Up to 597 conditions per place. [2024-06-21 19:25:20,718 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 117 selfloop transitions, 76 changer transitions 11/206 dead transitions. [2024-06-21 19:25:20,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 206 transitions, 2420 flow [2024-06-21 19:25:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 19:25:20,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:25:20,718 INFO L175 Difference]: Start difference. First operand has 274 places, 188 transitions, 1947 flow. Second operand 11 states and 143 transitions. [2024-06-21 19:25:20,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 206 transitions, 2420 flow [2024-06-21 19:25:21,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 206 transitions, 2280 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 19:25:21,104 INFO L231 Difference]: Finished difference. Result has 270 places, 185 transitions, 1939 flow [2024-06-21 19:25:21,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1939, PETRI_PLACES=270, PETRI_TRANSITIONS=185} [2024-06-21 19:25:21,104 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-21 19:25:21,105 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 185 transitions, 1939 flow [2024-06-21 19:25:21,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:21,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:21,105 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 19:25:21,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281 [2024-06-21 19:25:21,105 INFO L420 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:21,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:21,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1019338960, now seen corresponding path program 70 times [2024-06-21 19:25:21,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:21,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779884355] [2024-06-21 19:25:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:21,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:22,826 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 19:25:22,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:22,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779884355] [2024-06-21 19:25:22,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779884355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:22,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:22,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:22,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577016551] [2024-06-21 19:25:22,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:22,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:22,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:22,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:22,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:22,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:22,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 185 transitions, 1939 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:22,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:22,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:22,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:23,611 INFO L124 PetriNetUnfolderBase]: 467/947 cut-off events. [2024-06-21 19:25:23,611 INFO L125 PetriNetUnfolderBase]: For 155191/155191 co-relation queries the response was YES. [2024-06-21 19:25:23,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7107 conditions, 947 events. 467/947 cut-off events. For 155191/155191 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5084 event pairs, 85 based on Foata normal form. 10/955 useless extension candidates. Maximal degree in co-relation 6992. Up to 592 conditions per place. [2024-06-21 19:25:23,619 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 129 selfloop transitions, 58 changer transitions 12/201 dead transitions. [2024-06-21 19:25:23,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 201 transitions, 2399 flow [2024-06-21 19:25:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 19:25:23,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:25:23,619 INFO L175 Difference]: Start difference. First operand has 270 places, 185 transitions, 1939 flow. Second operand 11 states and 132 transitions. [2024-06-21 19:25:23,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 201 transitions, 2399 flow [2024-06-21 19:25:23,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 201 transitions, 2241 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:23,885 INFO L231 Difference]: Finished difference. Result has 265 places, 181 transitions, 1859 flow [2024-06-21 19:25:23,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1859, PETRI_PLACES=265, PETRI_TRANSITIONS=181} [2024-06-21 19:25:23,885 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-21 19:25:23,885 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 181 transitions, 1859 flow [2024-06-21 19:25:23,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:23,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:23,886 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 19:25:23,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282 [2024-06-21 19:25:23,886 INFO L420 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:23,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1019331024, now seen corresponding path program 15 times [2024-06-21 19:25:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:23,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476180360] [2024-06-21 19:25:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:26,603 INFO 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 19:25:26,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476180360] [2024-06-21 19:25:26,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476180360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:26,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:26,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:26,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740908561] [2024-06-21 19:25:26,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:26,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:26,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:26,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:26,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:26,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 181 transitions, 1859 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:26,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:26,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:26,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:27,469 INFO L124 PetriNetUnfolderBase]: 445/906 cut-off events. [2024-06-21 19:25:27,469 INFO L125 PetriNetUnfolderBase]: For 122949/122949 co-relation queries the response was YES. [2024-06-21 19:25:27,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6890 conditions, 906 events. 445/906 cut-off events. For 122949/122949 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4823 event pairs, 81 based on Foata normal form. 2/906 useless extension candidates. Maximal degree in co-relation 6777. Up to 652 conditions per place. [2024-06-21 19:25:27,479 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 150 selfloop transitions, 45 changer transitions 0/197 dead transitions. [2024-06-21 19:25:27,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 197 transitions, 2319 flow [2024-06-21 19:25:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:25:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:25:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 152 transitions. [2024-06-21 19:25:27,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35023041474654376 [2024-06-21 19:25:27,480 INFO L175 Difference]: Start difference. First operand has 265 places, 181 transitions, 1859 flow. Second operand 14 states and 152 transitions. [2024-06-21 19:25:27,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 197 transitions, 2319 flow [2024-06-21 19:25:27,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 197 transitions, 2199 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:27,714 INFO L231 Difference]: Finished difference. Result has 266 places, 182 transitions, 1871 flow [2024-06-21 19:25:27,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1739, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1871, PETRI_PLACES=266, PETRI_TRANSITIONS=182} [2024-06-21 19:25:27,715 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 19:25:27,715 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 182 transitions, 1871 flow [2024-06-21 19:25:27,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:27,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:27,715 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 19:25:27,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2024-06-21 19:25:27,715 INFO L420 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:27,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:27,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1213278370, now seen corresponding path program 71 times [2024-06-21 19:25:27,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:27,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227038336] [2024-06-21 19:25:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:27,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:29,451 INFO 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 19:25:29,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:29,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227038336] [2024-06-21 19:25:29,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227038336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:29,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:29,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:29,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108272775] [2024-06-21 19:25:29,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:29,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:29,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:29,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:29,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:29,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:29,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 182 transitions, 1871 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:29,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:29,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:29,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:30,334 INFO L124 PetriNetUnfolderBase]: 461/941 cut-off events. [2024-06-21 19:25:30,334 INFO L125 PetriNetUnfolderBase]: For 144683/144683 co-relation queries the response was YES. [2024-06-21 19:25:30,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6968 conditions, 941 events. 461/941 cut-off events. For 144683/144683 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5071 event pairs, 85 based on Foata normal form. 10/949 useless extension candidates. Maximal degree in co-relation 6856. Up to 586 conditions per place. [2024-06-21 19:25:30,341 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 130 selfloop transitions, 54 changer transitions 12/198 dead transitions. [2024-06-21 19:25:30,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 198 transitions, 2325 flow [2024-06-21 19:25:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 19:25:30,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:25:30,342 INFO L175 Difference]: Start difference. First operand has 266 places, 182 transitions, 1871 flow. Second operand 11 states and 132 transitions. [2024-06-21 19:25:30,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 198 transitions, 2325 flow [2024-06-21 19:25:30,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 198 transitions, 2232 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 19:25:30,601 INFO L231 Difference]: Finished difference. Result has 270 places, 178 transitions, 1847 flow [2024-06-21 19:25:30,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1847, PETRI_PLACES=270, PETRI_TRANSITIONS=178} [2024-06-21 19:25:30,601 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2024-06-21 19:25:30,601 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 178 transitions, 1847 flow [2024-06-21 19:25:30,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:30,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:30,601 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 19:25:30,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2024-06-21 19:25:30,601 INFO L420 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:30,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:30,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1012181184, now seen corresponding path program 16 times [2024-06-21 19:25:30,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:30,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512681250] [2024-06-21 19:25:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:30,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:32,695 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 19:25:32,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:32,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512681250] [2024-06-21 19:25:32,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512681250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:32,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:32,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:25:32,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246856298] [2024-06-21 19:25:32,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:32,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:25:32,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:25:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:25:32,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:32,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 178 transitions, 1847 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:32,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:32,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:32,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:33,213 INFO L124 PetriNetUnfolderBase]: 439/900 cut-off events. [2024-06-21 19:25:33,213 INFO L125 PetriNetUnfolderBase]: For 122954/122954 co-relation queries the response was YES. [2024-06-21 19:25:33,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6864 conditions, 900 events. 439/900 cut-off events. For 122954/122954 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4822 event pairs, 89 based on Foata normal form. 2/900 useless extension candidates. Maximal degree in co-relation 6751. Up to 588 conditions per place. [2024-06-21 19:25:33,219 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 143 selfloop transitions, 46 changer transitions 0/191 dead transitions. [2024-06-21 19:25:33,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 191 transitions, 2291 flow [2024-06-21 19:25:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:25:33,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:25:33,220 INFO L175 Difference]: Start difference. First operand has 270 places, 178 transitions, 1847 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:25:33,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 191 transitions, 2291 flow [2024-06-21 19:25:33,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 191 transitions, 2179 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:33,463 INFO L231 Difference]: Finished difference. Result has 268 places, 179 transitions, 1871 flow [2024-06-21 19:25:33,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1871, PETRI_PLACES=268, PETRI_TRANSITIONS=179} [2024-06-21 19:25:33,463 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 19:25:33,463 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 179 transitions, 1871 flow [2024-06-21 19:25:33,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:33,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:33,463 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 19:25:33,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2024-06-21 19:25:33,463 INFO L420 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:33,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1012189120, now seen corresponding path program 72 times [2024-06-21 19:25:33,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:33,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948440449] [2024-06-21 19:25:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:33,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:35,498 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 19:25:35,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:35,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948440449] [2024-06-21 19:25:35,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948440449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:35,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:35,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:35,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405786354] [2024-06-21 19:25:35,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:35,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:35,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:35,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:35,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:35,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:35,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 179 transitions, 1871 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:35,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:35,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:35,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:36,566 INFO L124 PetriNetUnfolderBase]: 426/876 cut-off events. [2024-06-21 19:25:36,566 INFO L125 PetriNetUnfolderBase]: For 113874/113874 co-relation queries the response was YES. [2024-06-21 19:25:36,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5964 conditions, 876 events. 426/876 cut-off events. For 113874/113874 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4680 event pairs, 72 based on Foata normal form. 10/884 useless extension candidates. Maximal degree in co-relation 5852. Up to 521 conditions per place. [2024-06-21 19:25:36,573 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 112 selfloop transitions, 72 changer transitions 12/198 dead transitions. [2024-06-21 19:25:36,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 198 transitions, 2331 flow [2024-06-21 19:25:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:25:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:25:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 153 transitions. [2024-06-21 19:25:36,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35253456221198154 [2024-06-21 19:25:36,574 INFO L175 Difference]: Start difference. First operand has 268 places, 179 transitions, 1871 flow. Second operand 14 states and 153 transitions. [2024-06-21 19:25:36,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 198 transitions, 2331 flow [2024-06-21 19:25:36,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 198 transitions, 2205 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 19:25:36,763 INFO L231 Difference]: Finished difference. Result has 273 places, 175 transitions, 1850 flow [2024-06-21 19:25:36,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1850, PETRI_PLACES=273, PETRI_TRANSITIONS=175} [2024-06-21 19:25:36,763 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 243 predicate places. [2024-06-21 19:25:36,763 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 175 transitions, 1850 flow [2024-06-21 19:25:36,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:36,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:36,763 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 19:25:36,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286 [2024-06-21 19:25:36,764 INFO L420 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:36,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1218848140, now seen corresponding path program 73 times [2024-06-21 19:25:36,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:36,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283049286] [2024-06-21 19:25:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:36,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:38,355 INFO 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 19:25:38,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283049286] [2024-06-21 19:25:38,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283049286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:38,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:38,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:38,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305283283] [2024-06-21 19:25:38,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:38,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:38,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:38,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:38,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:38,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:38,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 175 transitions, 1850 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:38,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:38,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:38,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:38,871 INFO L124 PetriNetUnfolderBase]: 441/913 cut-off events. [2024-06-21 19:25:38,871 INFO L125 PetriNetUnfolderBase]: For 141259/141259 co-relation queries the response was YES. [2024-06-21 19:25:38,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6881 conditions, 913 events. 441/913 cut-off events. For 141259/141259 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4940 event pairs, 82 based on Foata normal form. 8/919 useless extension candidates. Maximal degree in co-relation 6768. Up to 475 conditions per place. [2024-06-21 19:25:38,879 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 129 selfloop transitions, 59 changer transitions 7/197 dead transitions. [2024-06-21 19:25:38,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 197 transitions, 2498 flow [2024-06-21 19:25:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 152 transitions. [2024-06-21 19:25:38,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44574780058651026 [2024-06-21 19:25:38,880 INFO L175 Difference]: Start difference. First operand has 273 places, 175 transitions, 1850 flow. Second operand 11 states and 152 transitions. [2024-06-21 19:25:38,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 197 transitions, 2498 flow [2024-06-21 19:25:39,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 197 transitions, 2343 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-21 19:25:39,128 INFO L231 Difference]: Finished difference. Result has 266 places, 173 transitions, 1807 flow [2024-06-21 19:25:39,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1807, PETRI_PLACES=266, PETRI_TRANSITIONS=173} [2024-06-21 19:25:39,128 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 19:25:39,129 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 173 transitions, 1807 flow [2024-06-21 19:25:39,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:39,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:39,129 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 19:25:39,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2024-06-21 19:25:39,129 INFO L420 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:39,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1213270434, now seen corresponding path program 17 times [2024-06-21 19:25:39,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:39,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947234632] [2024-06-21 19:25:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:39,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:41,824 INFO 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 19:25:41,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:41,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947234632] [2024-06-21 19:25:41,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947234632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:41,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:41,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:41,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375849764] [2024-06-21 19:25:41,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:41,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:41,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:41,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:41,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:41,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:41,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 173 transitions, 1807 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:41,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:41,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:41,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:42,670 INFO L124 PetriNetUnfolderBase]: 427/884 cut-off events. [2024-06-21 19:25:42,670 INFO L125 PetriNetUnfolderBase]: For 120116/120116 co-relation queries the response was YES. [2024-06-21 19:25:42,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6757 conditions, 884 events. 427/884 cut-off events. For 120116/120116 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4737 event pairs, 89 based on Foata normal form. 2/884 useless extension candidates. Maximal degree in co-relation 6645. Up to 630 conditions per place. [2024-06-21 19:25:42,676 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 147 selfloop transitions, 40 changer transitions 0/189 dead transitions. [2024-06-21 19:25:42,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 189 transitions, 2255 flow [2024-06-21 19:25:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:25:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:25:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 150 transitions. [2024-06-21 19:25:42,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456221198156682 [2024-06-21 19:25:42,677 INFO L175 Difference]: Start difference. First operand has 266 places, 173 transitions, 1807 flow. Second operand 14 states and 150 transitions. [2024-06-21 19:25:42,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 189 transitions, 2255 flow [2024-06-21 19:25:42,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 189 transitions, 2135 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:42,956 INFO L231 Difference]: Finished difference. Result has 268 places, 174 transitions, 1813 flow [2024-06-21 19:25:42,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1813, PETRI_PLACES=268, PETRI_TRANSITIONS=174} [2024-06-21 19:25:42,957 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 19:25:42,957 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 174 transitions, 1813 flow [2024-06-21 19:25:42,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:42,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:42,957 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 19:25:42,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable288 [2024-06-21 19:25:42,957 INFO L420 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:42,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:42,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1011912414, now seen corresponding path program 18 times [2024-06-21 19:25:42,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:42,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42589304] [2024-06-21 19:25:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:42,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:44,802 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 19:25:44,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:44,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42589304] [2024-06-21 19:25:44,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42589304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:44,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:44,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:25:44,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278343953] [2024-06-21 19:25:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:44,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:25:44,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:44,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:25:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:25:44,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:44,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 174 transitions, 1813 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:44,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:44,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:44,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:45,399 INFO L124 PetriNetUnfolderBase]: 424/879 cut-off events. [2024-06-21 19:25:45,399 INFO L125 PetriNetUnfolderBase]: For 111156/111156 co-relation queries the response was YES. [2024-06-21 19:25:45,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6502 conditions, 879 events. 424/879 cut-off events. For 111156/111156 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4718 event pairs, 86 based on Foata normal form. 2/879 useless extension candidates. Maximal degree in co-relation 6391. Up to 587 conditions per place. [2024-06-21 19:25:45,406 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 139 selfloop transitions, 47 changer transitions 0/188 dead transitions. [2024-06-21 19:25:45,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 188 transitions, 2217 flow [2024-06-21 19:25:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:25:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:25:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 19:25:45,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 19:25:45,407 INFO L175 Difference]: Start difference. First operand has 268 places, 174 transitions, 1813 flow. Second operand 12 states and 134 transitions. [2024-06-21 19:25:45,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 188 transitions, 2217 flow [2024-06-21 19:25:45,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 188 transitions, 2068 flow, removed 19 selfloop flow, removed 15 redundant places. [2024-06-21 19:25:45,697 INFO L231 Difference]: Finished difference. Result has 265 places, 174 transitions, 1762 flow [2024-06-21 19:25:45,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1762, PETRI_PLACES=265, PETRI_TRANSITIONS=174} [2024-06-21 19:25:45,698 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-21 19:25:45,698 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 174 transitions, 1762 flow [2024-06-21 19:25:45,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:45,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:45,698 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 19:25:45,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable289 [2024-06-21 19:25:45,698 INFO L420 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:45,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:45,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1213485760, now seen corresponding path program 74 times [2024-06-21 19:25:45,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:45,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750968157] [2024-06-21 19:25:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:45,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:47,268 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 19:25:47,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:47,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750968157] [2024-06-21 19:25:47,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750968157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:47,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:47,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:47,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179623309] [2024-06-21 19:25:47,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:47,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:47,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:47,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:47,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:47,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:47,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 174 transitions, 1762 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:47,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:47,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:47,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:47,788 INFO L124 PetriNetUnfolderBase]: 458/952 cut-off events. [2024-06-21 19:25:47,788 INFO L125 PetriNetUnfolderBase]: For 156200/156200 co-relation queries the response was YES. [2024-06-21 19:25:47,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7343 conditions, 952 events. 458/952 cut-off events. For 156200/156200 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5231 event pairs, 101 based on Foata normal form. 8/958 useless extension candidates. Maximal degree in co-relation 7231. Up to 526 conditions per place. [2024-06-21 19:25:47,795 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 130 selfloop transitions, 56 changer transitions 7/195 dead transitions. [2024-06-21 19:25:47,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 195 transitions, 2398 flow [2024-06-21 19:25:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 151 transitions. [2024-06-21 19:25:47,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44281524926686217 [2024-06-21 19:25:47,796 INFO L175 Difference]: Start difference. First operand has 265 places, 174 transitions, 1762 flow. Second operand 11 states and 151 transitions. [2024-06-21 19:25:47,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 195 transitions, 2398 flow [2024-06-21 19:25:48,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 195 transitions, 2233 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-21 19:25:48,099 INFO L231 Difference]: Finished difference. Result has 264 places, 172 transitions, 1699 flow [2024-06-21 19:25:48,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1699, PETRI_PLACES=264, PETRI_TRANSITIONS=172} [2024-06-21 19:25:48,099 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2024-06-21 19:25:48,099 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 172 transitions, 1699 flow [2024-06-21 19:25:48,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:48,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:48,099 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 19:25:48,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290 [2024-06-21 19:25:48,099 INFO L420 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:48,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1213480180, now seen corresponding path program 75 times [2024-06-21 19:25:48,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:48,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286075102] [2024-06-21 19:25:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:48,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:49,897 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 19:25:49,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:49,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286075102] [2024-06-21 19:25:49,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286075102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:49,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:49,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:49,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442494846] [2024-06-21 19:25:49,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:49,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:49,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:49,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:49,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:50,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:50,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 172 transitions, 1699 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:50,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:50,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:50,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:50,550 INFO L124 PetriNetUnfolderBase]: 427/891 cut-off events. [2024-06-21 19:25:50,551 INFO L125 PetriNetUnfolderBase]: For 134279/134279 co-relation queries the response was YES. [2024-06-21 19:25:50,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6203 conditions, 891 events. 427/891 cut-off events. For 134279/134279 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4802 event pairs, 92 based on Foata normal form. 10/899 useless extension candidates. Maximal degree in co-relation 6093. Up to 526 conditions per place. [2024-06-21 19:25:50,557 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 120 selfloop transitions, 53 changer transitions 13/188 dead transitions. [2024-06-21 19:25:50,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 188 transitions, 2133 flow [2024-06-21 19:25:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 19:25:50,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 19:25:50,558 INFO L175 Difference]: Start difference. First operand has 264 places, 172 transitions, 1699 flow. Second operand 11 states and 145 transitions. [2024-06-21 19:25:50,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 188 transitions, 2133 flow [2024-06-21 19:25:50,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 188 transitions, 1995 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 19:25:50,783 INFO L231 Difference]: Finished difference. Result has 262 places, 168 transitions, 1641 flow [2024-06-21 19:25:50,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1641, PETRI_PLACES=262, PETRI_TRANSITIONS=168} [2024-06-21 19:25:50,783 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-21 19:25:50,783 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 168 transitions, 1641 flow [2024-06-21 19:25:50,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:50,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:50,783 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 19:25:50,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291 [2024-06-21 19:25:50,784 INFO L420 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:50,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:50,784 INFO L85 PathProgramCache]: Analyzing trace with hash -148832400, now seen corresponding path program 76 times [2024-06-21 19:25:50,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:50,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150469215] [2024-06-21 19:25:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:50,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:52,560 INFO 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 19:25:52,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:52,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150469215] [2024-06-21 19:25:52,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150469215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:52,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:52,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:25:52,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080972303] [2024-06-21 19:25:52,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:52,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:25:52,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:52,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:25:52,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:25:52,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:52,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 168 transitions, 1641 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:52,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:52,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:52,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:53,175 INFO L124 PetriNetUnfolderBase]: 389/817 cut-off events. [2024-06-21 19:25:53,176 INFO L125 PetriNetUnfolderBase]: For 99844/99844 co-relation queries the response was YES. [2024-06-21 19:25:53,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5047 conditions, 817 events. 389/817 cut-off events. For 99844/99844 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4346 event pairs, 73 based on Foata normal form. 10/825 useless extension candidates. Maximal degree in co-relation 4939. Up to 449 conditions per place. [2024-06-21 19:25:53,182 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 117 selfloop transitions, 52 changer transitions 13/184 dead transitions. [2024-06-21 19:25:53,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 184 transitions, 2063 flow [2024-06-21 19:25:53,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 19:25:53,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:25:53,183 INFO L175 Difference]: Start difference. First operand has 262 places, 168 transitions, 1641 flow. Second operand 11 states and 143 transitions. [2024-06-21 19:25:53,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 184 transitions, 2063 flow [2024-06-21 19:25:53,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 184 transitions, 1951 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:53,332 INFO L231 Difference]: Finished difference. Result has 257 places, 164 transitions, 1608 flow [2024-06-21 19:25:53,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1608, PETRI_PLACES=257, PETRI_TRANSITIONS=164} [2024-06-21 19:25:53,332 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-21 19:25:53,332 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 164 transitions, 1608 flow [2024-06-21 19:25:53,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:53,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:53,332 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 19:25:53,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292 [2024-06-21 19:25:53,332 INFO L420 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:53,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1218992290, now seen corresponding path program 77 times [2024-06-21 19:25:53,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:53,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267749573] [2024-06-21 19:25:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:53,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:55,016 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 19:25:55,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:55,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267749573] [2024-06-21 19:25:55,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267749573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:55,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:55,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:25:55,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860153313] [2024-06-21 19:25:55,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:55,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:25:55,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:55,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:25:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:25:55,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 19:25:55,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 164 transitions, 1608 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:55,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:55,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 19:25:55,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:55,553 INFO L124 PetriNetUnfolderBase]: 354/748 cut-off events. [2024-06-21 19:25:55,553 INFO L125 PetriNetUnfolderBase]: For 65587/65587 co-relation queries the response was YES. [2024-06-21 19:25:55,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4147 conditions, 748 events. 354/748 cut-off events. For 65587/65587 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3935 event pairs, 49 based on Foata normal form. 8/754 useless extension candidates. Maximal degree in co-relation 4041. Up to 385 conditions per place. [2024-06-21 19:25:55,559 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 113 selfloop transitions, 50 changer transitions 14/179 dead transitions. [2024-06-21 19:25:55,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 179 transitions, 2006 flow [2024-06-21 19:25:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 19:25:55,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 19:25:55,560 INFO L175 Difference]: Start difference. First operand has 257 places, 164 transitions, 1608 flow. Second operand 11 states and 138 transitions. [2024-06-21 19:25:55,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 179 transitions, 2006 flow [2024-06-21 19:25:55,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 179 transitions, 1896 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:55,684 INFO L231 Difference]: Finished difference. Result has 252 places, 159 transitions, 1568 flow [2024-06-21 19:25:55,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1568, PETRI_PLACES=252, PETRI_TRANSITIONS=159} [2024-06-21 19:25:55,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2024-06-21 19:25:55,684 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 159 transitions, 1568 flow [2024-06-21 19:25:55,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:55,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:55,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:55,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293 [2024-06-21 19:25:55,684 INFO L420 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:55,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:55,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2028462993, now seen corresponding path program 1 times [2024-06-21 19:25:55,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:55,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375884760] [2024-06-21 19:25:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:55,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:57,870 INFO 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 19:25:57,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:57,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375884760] [2024-06-21 19:25:57,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375884760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:57,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:57,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:25:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907586396] [2024-06-21 19:25:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:25:57,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:25:57,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:25:58,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:58,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 159 transitions, 1568 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:58,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:58,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:58,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:58,388 INFO L124 PetriNetUnfolderBase]: 339/720 cut-off events. [2024-06-21 19:25:58,388 INFO L125 PetriNetUnfolderBase]: For 56987/56987 co-relation queries the response was YES. [2024-06-21 19:25:58,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4006 conditions, 720 events. 339/720 cut-off events. For 56987/56987 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3763 event pairs, 81 based on Foata normal form. 6/724 useless extension candidates. Maximal degree in co-relation 3902. Up to 471 conditions per place. [2024-06-21 19:25:58,394 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 131 selfloop transitions, 35 changer transitions 7/175 dead transitions. [2024-06-21 19:25:58,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 175 transitions, 1962 flow [2024-06-21 19:25:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:25:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:25:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 19:25:58,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 19:25:58,394 INFO L175 Difference]: Start difference. First operand has 252 places, 159 transitions, 1568 flow. Second operand 12 states and 134 transitions. [2024-06-21 19:25:58,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 175 transitions, 1962 flow [2024-06-21 19:25:58,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 175 transitions, 1833 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 19:25:58,508 INFO L231 Difference]: Finished difference. Result has 245 places, 156 transitions, 1482 flow [2024-06-21 19:25:58,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1482, PETRI_PLACES=245, PETRI_TRANSITIONS=156} [2024-06-21 19:25:58,509 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 215 predicate places. [2024-06-21 19:25:58,509 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 156 transitions, 1482 flow [2024-06-21 19:25:58,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:58,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:58,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:58,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294 [2024-06-21 19:25:58,509 INFO L420 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:58,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:58,509 INFO L85 PathProgramCache]: Analyzing trace with hash 911756753, now seen corresponding path program 2 times [2024-06-21 19:25:58,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:58,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671135996] [2024-06-21 19:25:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:00,894 INFO 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 19:26:00,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:00,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671135996] [2024-06-21 19:26:00,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671135996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:00,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:00,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:26:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835606315] [2024-06-21 19:26:00,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:00,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:26:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:00,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:26:00,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:26:01,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:01,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 156 transitions, 1482 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:01,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:01,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:01,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:01,438 INFO L124 PetriNetUnfolderBase]: 326/690 cut-off events. [2024-06-21 19:26:01,439 INFO L125 PetriNetUnfolderBase]: For 52403/52403 co-relation queries the response was YES. [2024-06-21 19:26:01,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3757 conditions, 690 events. 326/690 cut-off events. For 52403/52403 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3553 event pairs, 83 based on Foata normal form. 6/694 useless extension candidates. Maximal degree in co-relation 3657. Up to 467 conditions per place. [2024-06-21 19:26:01,443 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 121 selfloop transitions, 35 changer transitions 13/171 dead transitions. [2024-06-21 19:26:01,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 171 transitions, 1858 flow [2024-06-21 19:26:01,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 19:26:01,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 19:26:01,444 INFO L175 Difference]: Start difference. First operand has 245 places, 156 transitions, 1482 flow. Second operand 12 states and 135 transitions. [2024-06-21 19:26:01,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 171 transitions, 1858 flow [2024-06-21 19:26:01,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 171 transitions, 1775 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 19:26:01,541 INFO L231 Difference]: Finished difference. Result has 244 places, 150 transitions, 1421 flow [2024-06-21 19:26:01,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1421, PETRI_PLACES=244, PETRI_TRANSITIONS=150} [2024-06-21 19:26:01,542 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2024-06-21 19:26:01,542 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 150 transitions, 1421 flow [2024-06-21 19:26:01,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:01,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:01,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:01,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295 [2024-06-21 19:26:01,542 INFO L420 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:01,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1195834479, now seen corresponding path program 3 times [2024-06-21 19:26:01,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:01,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206797212] [2024-06-21 19:26:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:01,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:03,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:03,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206797212] [2024-06-21 19:26:03,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206797212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:03,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:03,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:03,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935712812] [2024-06-21 19:26:03,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:03,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:03,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:03,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:03,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:03,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:03,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 150 transitions, 1421 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:03,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:03,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:03,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:04,298 INFO L124 PetriNetUnfolderBase]: 315/669 cut-off events. [2024-06-21 19:26:04,298 INFO L125 PetriNetUnfolderBase]: For 52377/52377 co-relation queries the response was YES. [2024-06-21 19:26:04,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3666 conditions, 669 events. 315/669 cut-off events. For 52377/52377 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3421 event pairs, 83 based on Foata normal form. 6/673 useless extension candidates. Maximal degree in co-relation 3566. Up to 457 conditions per place. [2024-06-21 19:26:04,303 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 115 selfloop transitions, 34 changer transitions 14/165 dead transitions. [2024-06-21 19:26:04,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 165 transitions, 1785 flow [2024-06-21 19:26:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 19:26:04,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:26:04,304 INFO L175 Difference]: Start difference. First operand has 244 places, 150 transitions, 1421 flow. Second operand 12 states and 132 transitions. [2024-06-21 19:26:04,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 165 transitions, 1785 flow [2024-06-21 19:26:04,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 165 transitions, 1707 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 19:26:04,401 INFO L231 Difference]: Finished difference. Result has 238 places, 143 transitions, 1344 flow [2024-06-21 19:26:04,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1344, PETRI_PLACES=238, PETRI_TRANSITIONS=143} [2024-06-21 19:26:04,401 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 208 predicate places. [2024-06-21 19:26:04,401 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 143 transitions, 1344 flow [2024-06-21 19:26:04,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:04,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:04,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:04,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296 [2024-06-21 19:26:04,401 INFO L420 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:04,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:04,402 INFO L85 PathProgramCache]: Analyzing trace with hash -689162573, now seen corresponding path program 4 times [2024-06-21 19:26:04,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:04,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030298862] [2024-06-21 19:26:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:04,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:06,584 INFO 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 19:26:06,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:06,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030298862] [2024-06-21 19:26:06,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030298862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:06,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:06,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:26:06,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703692632] [2024-06-21 19:26:06,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:06,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:26:06,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:06,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:26:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:26:06,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:06,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 143 transitions, 1344 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:06,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:06,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:06,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:07,106 INFO L124 PetriNetUnfolderBase]: 301/647 cut-off events. [2024-06-21 19:26:07,106 INFO L125 PetriNetUnfolderBase]: For 50865/50865 co-relation queries the response was YES. [2024-06-21 19:26:07,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3545 conditions, 647 events. 301/647 cut-off events. For 50865/50865 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3307 event pairs, 83 based on Foata normal form. 6/651 useless extension candidates. Maximal degree in co-relation 3446. Up to 447 conditions per place. [2024-06-21 19:26:07,110 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 106 selfloop transitions, 33 changer transitions 17/158 dead transitions. [2024-06-21 19:26:07,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 158 transitions, 1694 flow [2024-06-21 19:26:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:07,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 19:26:07,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 19:26:07,111 INFO L175 Difference]: Start difference. First operand has 238 places, 143 transitions, 1344 flow. Second operand 12 states and 133 transitions. [2024-06-21 19:26:07,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 158 transitions, 1694 flow [2024-06-21 19:26:07,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 158 transitions, 1604 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-21 19:26:07,209 INFO L231 Difference]: Finished difference. Result has 231 places, 135 transitions, 1254 flow [2024-06-21 19:26:07,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1254, PETRI_PLACES=231, PETRI_TRANSITIONS=135} [2024-06-21 19:26:07,209 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2024-06-21 19:26:07,209 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 135 transitions, 1254 flow [2024-06-21 19:26:07,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:07,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:07,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:07,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297 [2024-06-21 19:26:07,210 INFO L420 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:07,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:07,210 INFO L85 PathProgramCache]: Analyzing trace with hash -751008545, now seen corresponding path program 5 times [2024-06-21 19:26:07,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:07,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354496249] [2024-06-21 19:26:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:07,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:09,348 INFO 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 19:26:09,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:09,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354496249] [2024-06-21 19:26:09,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354496249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:09,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:09,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:26:09,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167148664] [2024-06-21 19:26:09,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:09,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:26:09,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:26:09,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:26:09,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:09,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 135 transitions, 1254 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:09,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:09,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:09,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:09,920 INFO L124 PetriNetUnfolderBase]: 288/620 cut-off events. [2024-06-21 19:26:09,920 INFO L125 PetriNetUnfolderBase]: For 48065/48065 co-relation queries the response was YES. [2024-06-21 19:26:09,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3383 conditions, 620 events. 288/620 cut-off events. For 48065/48065 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3135 event pairs, 83 based on Foata normal form. 6/624 useless extension candidates. Maximal degree in co-relation 3286. Up to 437 conditions per place. [2024-06-21 19:26:09,924 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 23 changer transitions 16/150 dead transitions. [2024-06-21 19:26:09,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 150 transitions, 1588 flow [2024-06-21 19:26:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 19:26:09,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 19:26:09,925 INFO L175 Difference]: Start difference. First operand has 231 places, 135 transitions, 1254 flow. Second operand 12 states and 133 transitions. [2024-06-21 19:26:09,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 150 transitions, 1588 flow [2024-06-21 19:26:10,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 150 transitions, 1505 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 19:26:10,009 INFO L231 Difference]: Finished difference. Result has 221 places, 128 transitions, 1163 flow [2024-06-21 19:26:10,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1163, PETRI_PLACES=221, PETRI_TRANSITIONS=128} [2024-06-21 19:26:10,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-06-21 19:26:10,009 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 128 transitions, 1163 flow [2024-06-21 19:26:10,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:10,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:10,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:10,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298 [2024-06-21 19:26:10,010 INFO L420 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:10,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:10,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1196122779, now seen corresponding path program 6 times [2024-06-21 19:26:10,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:10,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615461971] [2024-06-21 19:26:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:10,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:12,476 INFO 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 19:26:12,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:12,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615461971] [2024-06-21 19:26:12,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615461971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:12,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:12,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:12,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734816108] [2024-06-21 19:26:12,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:12,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:12,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:12,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:12,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:12,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 128 transitions, 1163 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:12,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:12,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:12,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:13,027 INFO L124 PetriNetUnfolderBase]: 276/596 cut-off events. [2024-06-21 19:26:13,027 INFO L125 PetriNetUnfolderBase]: For 43983/43983 co-relation queries the response was YES. [2024-06-21 19:26:13,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3212 conditions, 596 events. 276/596 cut-off events. For 43983/43983 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2963 event pairs, 81 based on Foata normal form. 6/600 useless extension candidates. Maximal degree in co-relation 3118. Up to 409 conditions per place. [2024-06-21 19:26:13,030 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 98 selfloop transitions, 17 changer transitions 27/144 dead transitions. [2024-06-21 19:26:13,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 144 transitions, 1487 flow [2024-06-21 19:26:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 19:26:13,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 19:26:13,031 INFO L175 Difference]: Start difference. First operand has 221 places, 128 transitions, 1163 flow. Second operand 12 states and 130 transitions. [2024-06-21 19:26:13,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 144 transitions, 1487 flow [2024-06-21 19:26:13,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 144 transitions, 1429 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 19:26:13,114 INFO L231 Difference]: Finished difference. Result has 212 places, 113 transitions, 1021 flow [2024-06-21 19:26:13,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1021, PETRI_PLACES=212, PETRI_TRANSITIONS=113} [2024-06-21 19:26:13,114 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2024-06-21 19:26:13,114 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 113 transitions, 1021 flow [2024-06-21 19:26:13,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:13,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:13,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:13,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299 [2024-06-21 19:26:13,115 INFO L420 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:13,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1836631629, now seen corresponding path program 7 times [2024-06-21 19:26:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:13,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961198599] [2024-06-21 19:26:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:15,435 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 19:26:15,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:15,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961198599] [2024-06-21 19:26:15,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961198599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:15,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:15,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:26:15,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224002780] [2024-06-21 19:26:15,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:15,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:26:15,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:15,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:26:15,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:26:15,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:15,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 113 transitions, 1021 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:15,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:15,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:15,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:15,968 INFO L124 PetriNetUnfolderBase]: 248/533 cut-off events. [2024-06-21 19:26:15,968 INFO L125 PetriNetUnfolderBase]: For 39981/39981 co-relation queries the response was YES. [2024-06-21 19:26:15,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2903 conditions, 533 events. 248/533 cut-off events. For 39981/39981 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2564 event pairs, 78 based on Foata normal form. 6/537 useless extension candidates. Maximal degree in co-relation 2812. Up to 440 conditions per place. [2024-06-21 19:26:15,971 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 98 selfloop transitions, 18 changer transitions 12/130 dead transitions. [2024-06-21 19:26:15,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 130 transitions, 1341 flow [2024-06-21 19:26:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 126 transitions. [2024-06-21 19:26:15,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 19:26:15,972 INFO L175 Difference]: Start difference. First operand has 212 places, 113 transitions, 1021 flow. Second operand 12 states and 126 transitions. [2024-06-21 19:26:15,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 130 transitions, 1341 flow [2024-06-21 19:26:16,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 130 transitions, 1240 flow, removed 11 selfloop flow, removed 21 redundant places. [2024-06-21 19:26:16,023 INFO L231 Difference]: Finished difference. Result has 185 places, 109 transitions, 929 flow [2024-06-21 19:26:16,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=929, PETRI_PLACES=185, PETRI_TRANSITIONS=109} [2024-06-21 19:26:16,023 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-21 19:26:16,023 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 109 transitions, 929 flow [2024-06-21 19:26:16,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:16,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:16,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:16,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable300 [2024-06-21 19:26:16,024 INFO L420 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:16,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:16,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1614986589, now seen corresponding path program 8 times [2024-06-21 19:26:16,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:16,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742530847] [2024-06-21 19:26:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:16,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:18,116 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 19:26:18,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:18,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742530847] [2024-06-21 19:26:18,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742530847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:18,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:18,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:18,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785585032] [2024-06-21 19:26:18,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:18,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:18,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:18,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:18,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:18,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:18,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 109 transitions, 929 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:18,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:18,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:18,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:18,723 INFO L124 PetriNetUnfolderBase]: 239/514 cut-off events. [2024-06-21 19:26:18,723 INFO L125 PetriNetUnfolderBase]: For 29381/29381 co-relation queries the response was YES. [2024-06-21 19:26:18,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2651 conditions, 514 events. 239/514 cut-off events. For 29381/29381 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2437 event pairs, 78 based on Foata normal form. 6/518 useless extension candidates. Maximal degree in co-relation 2570. Up to 430 conditions per place. [2024-06-21 19:26:18,726 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 97 selfloop transitions, 14 changer transitions 12/125 dead transitions. [2024-06-21 19:26:18,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 125 transitions, 1227 flow [2024-06-21 19:26:18,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:26:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:26:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 19:26:18,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 19:26:18,727 INFO L175 Difference]: Start difference. First operand has 185 places, 109 transitions, 929 flow. Second operand 11 states and 120 transitions. [2024-06-21 19:26:18,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 125 transitions, 1227 flow [2024-06-21 19:26:18,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 125 transitions, 1181 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:26:18,778 INFO L231 Difference]: Finished difference. Result has 179 places, 105 transitions, 881 flow [2024-06-21 19:26:18,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=881, PETRI_PLACES=179, PETRI_TRANSITIONS=105} [2024-06-21 19:26:18,778 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-21 19:26:18,778 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 105 transitions, 881 flow [2024-06-21 19:26:18,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:18,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:18,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:18,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301 [2024-06-21 19:26:18,779 INFO L420 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:18,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1606654719, now seen corresponding path program 9 times [2024-06-21 19:26:18,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:18,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500351167] [2024-06-21 19:26:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:18,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:20,722 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 19:26:20,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:20,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500351167] [2024-06-21 19:26:20,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500351167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:20,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:20,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:20,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558037582] [2024-06-21 19:26:20,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:20,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:20,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:20,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:20,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:20,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:20,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 105 transitions, 881 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:20,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:20,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:20,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:21,293 INFO L124 PetriNetUnfolderBase]: 229/496 cut-off events. [2024-06-21 19:26:21,294 INFO L125 PetriNetUnfolderBase]: For 28275/28275 co-relation queries the response was YES. [2024-06-21 19:26:21,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2550 conditions, 496 events. 229/496 cut-off events. For 28275/28275 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2327 event pairs, 76 based on Foata normal form. 6/500 useless extension candidates. Maximal degree in co-relation 2470. Up to 412 conditions per place. [2024-06-21 19:26:21,298 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 93 selfloop transitions, 11 changer transitions 15/121 dead transitions. [2024-06-21 19:26:21,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 121 transitions, 1164 flow [2024-06-21 19:26:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:21,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 19:26:21,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 19:26:21,299 INFO L175 Difference]: Start difference. First operand has 179 places, 105 transitions, 881 flow. Second operand 12 states and 125 transitions. [2024-06-21 19:26:21,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 121 transitions, 1164 flow [2024-06-21 19:26:21,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 121 transitions, 1130 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 19:26:21,368 INFO L231 Difference]: Finished difference. Result has 176 places, 100 transitions, 831 flow [2024-06-21 19:26:21,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=831, PETRI_PLACES=176, PETRI_TRANSITIONS=100} [2024-06-21 19:26:21,369 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-06-21 19:26:21,369 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 100 transitions, 831 flow [2024-06-21 19:26:21,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:21,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:21,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:21,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302 [2024-06-21 19:26:21,369 INFO L420 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:21,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2115136085, now seen corresponding path program 10 times [2024-06-21 19:26:21,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:21,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348510056] [2024-06-21 19:26:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:21,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:23,486 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 19:26:23,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:23,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348510056] [2024-06-21 19:26:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348510056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:23,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:26:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659716693] [2024-06-21 19:26:23,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:23,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:26:23,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:26:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:26:23,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:23,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 100 transitions, 831 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:23,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:23,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:23,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:23,956 INFO L124 PetriNetUnfolderBase]: 216/469 cut-off events. [2024-06-21 19:26:23,956 INFO L125 PetriNetUnfolderBase]: For 26175/26175 co-relation queries the response was YES. [2024-06-21 19:26:23,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2414 conditions, 469 events. 216/469 cut-off events. For 26175/26175 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2143 event pairs, 72 based on Foata normal form. 6/473 useless extension candidates. Maximal degree in co-relation 2336. Up to 397 conditions per place. [2024-06-21 19:26:23,959 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 90 selfloop transitions, 10 changer transitions 14/116 dead transitions. [2024-06-21 19:26:23,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 116 transitions, 1097 flow [2024-06-21 19:26:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-06-21 19:26:23,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32526881720430106 [2024-06-21 19:26:23,959 INFO L175 Difference]: Start difference. First operand has 176 places, 100 transitions, 831 flow. Second operand 12 states and 121 transitions. [2024-06-21 19:26:23,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 116 transitions, 1097 flow [2024-06-21 19:26:24,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 116 transitions, 1067 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 19:26:24,002 INFO L231 Difference]: Finished difference. Result has 169 places, 96 transitions, 800 flow [2024-06-21 19:26:24,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=800, PETRI_PLACES=169, PETRI_TRANSITIONS=96} [2024-06-21 19:26:24,002 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2024-06-21 19:26:24,002 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 96 transitions, 800 flow [2024-06-21 19:26:24,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:24,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:24,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:24,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2024-06-21 19:26:24,002 INFO L420 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:24,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:24,002 INFO L85 PathProgramCache]: Analyzing trace with hash -304675907, now seen corresponding path program 11 times [2024-06-21 19:26:24,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:24,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995540845] [2024-06-21 19:26:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:24,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:25,903 INFO 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 19:26:25,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:25,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995540845] [2024-06-21 19:26:25,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995540845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:25,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:25,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:26:25,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808654663] [2024-06-21 19:26:25,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:25,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:26:25,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:26:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:26:26,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:26,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 96 transitions, 800 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:26,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:26,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:26,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:26,382 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2024-06-21 19:26:26,382 INFO L125 PetriNetUnfolderBase]: For 23199/23199 co-relation queries the response was YES. [2024-06-21 19:26:26,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 443 events. 202/443 cut-off events. For 23199/23199 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1984 event pairs, 70 based on Foata normal form. 6/447 useless extension candidates. Maximal degree in co-relation 2214. Up to 341 conditions per place. [2024-06-21 19:26:26,384 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 84 selfloop transitions, 15 changer transitions 11/112 dead transitions. [2024-06-21 19:26:26,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 112 transitions, 1058 flow [2024-06-21 19:26:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 19:26:26,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 19:26:26,385 INFO L175 Difference]: Start difference. First operand has 169 places, 96 transitions, 800 flow. Second operand 12 states and 125 transitions. [2024-06-21 19:26:26,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 112 transitions, 1058 flow [2024-06-21 19:26:26,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 112 transitions, 1030 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 19:26:26,421 INFO L231 Difference]: Finished difference. Result has 163 places, 91 transitions, 762 flow [2024-06-21 19:26:26,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=762, PETRI_PLACES=163, PETRI_TRANSITIONS=91} [2024-06-21 19:26:26,421 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 19:26:26,421 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 91 transitions, 762 flow [2024-06-21 19:26:26,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:26,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:26,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:26,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304 [2024-06-21 19:26:26,422 INFO L420 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:26,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1798461841, now seen corresponding path program 12 times [2024-06-21 19:26:26,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:26,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100552651] [2024-06-21 19:26:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:26,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:28,565 INFO 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 19:26:28,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:28,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100552651] [2024-06-21 19:26:28,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100552651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:28,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:28,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:28,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056107840] [2024-06-21 19:26:28,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:28,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:28,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:28,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:28,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:28,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:28,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 91 transitions, 762 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:28,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:28,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:28,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:29,083 INFO L124 PetriNetUnfolderBase]: 186/415 cut-off events. [2024-06-21 19:26:29,084 INFO L125 PetriNetUnfolderBase]: For 20407/20407 co-relation queries the response was YES. [2024-06-21 19:26:29,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 415 events. 186/415 cut-off events. For 20407/20407 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1843 event pairs, 70 based on Foata normal form. 6/419 useless extension candidates. Maximal degree in co-relation 2095. Up to 307 conditions per place. [2024-06-21 19:26:29,086 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 77 selfloop transitions, 16 changer transitions 12/107 dead transitions. [2024-06-21 19:26:29,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 107 transitions, 1024 flow [2024-06-21 19:26:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-21 19:26:29,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467741935483871 [2024-06-21 19:26:29,086 INFO L175 Difference]: Start difference. First operand has 163 places, 91 transitions, 762 flow. Second operand 12 states and 129 transitions. [2024-06-21 19:26:29,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 107 transitions, 1024 flow [2024-06-21 19:26:29,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 107 transitions, 982 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 19:26:29,117 INFO L231 Difference]: Finished difference. Result has 158 places, 87 transitions, 728 flow [2024-06-21 19:26:29,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=728, PETRI_PLACES=158, PETRI_TRANSITIONS=87} [2024-06-21 19:26:29,118 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-21 19:26:29,118 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 87 transitions, 728 flow [2024-06-21 19:26:29,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:29,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:29,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:29,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305 [2024-06-21 19:26:29,118 INFO L420 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:29,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:29,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1072806463, now seen corresponding path program 13 times [2024-06-21 19:26:29,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:29,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10681889] [2024-06-21 19:26:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:29,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:31,239 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 19:26:31,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:31,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10681889] [2024-06-21 19:26:31,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10681889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:31,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:31,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:31,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300896396] [2024-06-21 19:26:31,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:31,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:31,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:31,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:31,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:31,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 87 transitions, 728 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:31,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:31,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:31,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:31,830 INFO L124 PetriNetUnfolderBase]: 177/396 cut-off events. [2024-06-21 19:26:31,830 INFO L125 PetriNetUnfolderBase]: For 18667/18667 co-relation queries the response was YES. [2024-06-21 19:26:31,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2046 conditions, 396 events. 177/396 cut-off events. For 18667/18667 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1717 event pairs, 70 based on Foata normal form. 6/400 useless extension candidates. Maximal degree in co-relation 1992. Up to 318 conditions per place. [2024-06-21 19:26:31,832 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 74 selfloop transitions, 12 changer transitions 14/102 dead transitions. [2024-06-21 19:26:31,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 102 transitions, 964 flow [2024-06-21 19:26:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:26:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:26:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 129 transitions. [2024-06-21 19:26:31,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3200992555831266 [2024-06-21 19:26:31,832 INFO L175 Difference]: Start difference. First operand has 158 places, 87 transitions, 728 flow. Second operand 13 states and 129 transitions. [2024-06-21 19:26:31,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 102 transitions, 964 flow [2024-06-21 19:26:31,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 102 transitions, 928 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:26:31,861 INFO L231 Difference]: Finished difference. Result has 155 places, 79 transitions, 636 flow [2024-06-21 19:26:31,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=636, PETRI_PLACES=155, PETRI_TRANSITIONS=79} [2024-06-21 19:26:31,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-21 19:26:31,863 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 79 transitions, 636 flow [2024-06-21 19:26:31,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:31,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:31,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:31,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306 [2024-06-21 19:26:31,863 INFO L420 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:31,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1369141973, now seen corresponding path program 1 times [2024-06-21 19:26:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:31,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019648189] [2024-06-21 19:26:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:33,744 INFO 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 19:26:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019648189] [2024-06-21 19:26:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019648189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:33,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069979126] [2024-06-21 19:26:33,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:33,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:33,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:33,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:33,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:33,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:33,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 79 transitions, 636 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:33,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:33,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:33,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:34,280 INFO L124 PetriNetUnfolderBase]: 145/332 cut-off events. [2024-06-21 19:26:34,280 INFO L125 PetriNetUnfolderBase]: For 12463/12463 co-relation queries the response was YES. [2024-06-21 19:26:34,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 332 events. 145/332 cut-off events. For 12463/12463 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1362 event pairs, 62 based on Foata normal form. 8/338 useless extension candidates. Maximal degree in co-relation 1414. Up to 265 conditions per place. [2024-06-21 19:26:34,282 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 66 selfloop transitions, 6 changer transitions 19/93 dead transitions. [2024-06-21 19:26:34,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 93 transitions, 852 flow [2024-06-21 19:26:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:26:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:26:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 126 transitions. [2024-06-21 19:26:34,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31265508684863524 [2024-06-21 19:26:34,282 INFO L175 Difference]: Start difference. First operand has 155 places, 79 transitions, 636 flow. Second operand 13 states and 126 transitions. [2024-06-21 19:26:34,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 93 transitions, 852 flow [2024-06-21 19:26:34,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 93 transitions, 786 flow, removed 8 selfloop flow, removed 18 redundant places. [2024-06-21 19:26:34,294 INFO L231 Difference]: Finished difference. Result has 143 places, 70 transitions, 527 flow [2024-06-21 19:26:34,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=527, PETRI_PLACES=143, PETRI_TRANSITIONS=70} [2024-06-21 19:26:34,295 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-21 19:26:34,295 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 70 transitions, 527 flow [2024-06-21 19:26:34,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:34,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:34,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:34,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307 [2024-06-21 19:26:34,295 INFO L420 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:34,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -622659221, now seen corresponding path program 14 times [2024-06-21 19:26:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73890562] [2024-06-21 19:26:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15