./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.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/safe025_rmo.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/safe025_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_rmo.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 19:45:04,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:45:04,996 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:45:05,000 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:45:05,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:45:05,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:45:05,045 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:45:05,046 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:45:05,057 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:45:05,058 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:45:05,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:45:05,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:45:05,059 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:45:05,059 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:45:05,060 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:45:05,060 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:45:05,060 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:45:05,061 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:45:05,061 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:45:05,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:45:05,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:45:05,065 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:45:05,066 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:45:05,066 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:45:05,066 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:45:05,066 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:45:05,066 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:45:05,067 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:45:05,067 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:45:05,067 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:45:05,068 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:45:05,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:45:05,068 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:45:05,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:45:05,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:45:05,069 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:45:05,069 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:45:05,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:45:05,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:45:05,070 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:45:05,070 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:45:05,070 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:45:05,070 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:45:05,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:45:05,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:45:05,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:45:05,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:45:05,375 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:45:05,376 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:45:05,377 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_rmo.yml/witness.yml [2024-06-21 19:45:05,460 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:45:05,460 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:45:05,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-21 19:45:06,725 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:45:06,970 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:45:06,970 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-21 19:45:06,984 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c029453b9/9c2257ac1d2c455b9a49b614499f4e0f/FLAG9c45ce098 [2024-06-21 19:45:06,995 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c029453b9/9c2257ac1d2c455b9a49b614499f4e0f [2024-06-21 19:45:06,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:45:06,996 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:45:06,997 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:45:06,997 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:45:07,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:45:07,001 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:45:05" (1/2) ... [2024-06-21 19:45:07,002 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22a9312a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:45:07, skipping insertion in model container [2024-06-21 19:45:07,002 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:45:05" (1/2) ... [2024-06-21 19:45:07,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@58adf7e7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:45:07, skipping insertion in model container [2024-06-21 19:45:07,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:45:06" (2/2) ... [2024-06-21 19:45:07,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22a9312a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07, skipping insertion in model container [2024-06-21 19:45:07,006 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:45:06" (2/2) ... [2024-06-21 19:45:07,006 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:45:07,031 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:45:07,032 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) [2024-06-21 19:45:07,032 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) [2024-06-21 19:45:07,033 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) [2024-06-21 19:45:07,033 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:45:07,033 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-21 19:45:07,071 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:45:07,463 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:45:07,475 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:45:07,659 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:45:07,703 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:45:07,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07 WrapperNode [2024-06-21 19:45:07,704 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:45:07,705 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:45:07,705 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:45:07,706 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:45:07,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,777 INFO L138 Inliner]: procedures = 175, calls = 76, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 180 [2024-06-21 19:45:07,778 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:45:07,779 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:45:07,779 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:45:07,779 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:45:07,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,800 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,830 INFO L175 MemorySlicer]: Split 33 memory accesses to 2 slices as follows [2, 31]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-21 19:45:07,831 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,832 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,843 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,848 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,850 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,854 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:45:07,855 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:45:07,855 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:45:07,855 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:45:07,856 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (1/1) ... [2024-06-21 19:45:07,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:45:07,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:45:07,883 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 19:45:07,904 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 19:45:07,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 19:45:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 19:45:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 19:45:07,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 19:45:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:45:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:45:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:45:07,930 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:45:07,930 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:45:07,930 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:45:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:45:07,931 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:45:07,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:45:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 19:45:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:45:07,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:45:07,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:45:07,935 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 19:45:08,042 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:45:08,043 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:45:08,561 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:45:08,561 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:45:08,853 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:45:08,854 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:45:08,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:45:08 BoogieIcfgContainer [2024-06-21 19:45:08,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:45:08,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:45:08,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:45:08,860 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:45:08,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:45:05" (1/4) ... [2024-06-21 19:45:08,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5224fe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:45:08, skipping insertion in model container [2024-06-21 19:45:08,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:45:06" (2/4) ... [2024-06-21 19:45:08,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5224fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:45:08, skipping insertion in model container [2024-06-21 19:45:08,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:45:07" (3/4) ... [2024-06-21 19:45:08,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5224fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:45:08, skipping insertion in model container [2024-06-21 19:45:08,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:45:08" (4/4) ... [2024-06-21 19:45:08,866 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_rmo.i [2024-06-21 19:45:08,880 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:45:08,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:45:08,881 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:45:08,936 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:45:08,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 19:45:09,022 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 19:45:09,023 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:45:09,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:45:09,026 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 19:45:09,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 19:45:09,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:45:09,048 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;@7900d2b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:45:09,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:45:09,054 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:45:09,054 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 19:45:09,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:45:09,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:09,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:45:09,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:09,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash 721393202, now seen corresponding path program 1 times [2024-06-21 19:45:09,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:09,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787377452] [2024-06-21 19:45:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:09,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:10,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787377452] [2024-06-21 19:45:10,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787377452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:10,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:10,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:45:10,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808740400] [2024-06-21 19:45:10,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:10,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:45:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:45:10,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:45:10,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 19:45:10,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:10,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:10,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 19:45:10,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:11,314 INFO L124 PetriNetUnfolderBase]: 1205/1912 cut-off events. [2024-06-21 19:45:11,314 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 19:45:11,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1912 events. 1205/1912 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9433 event pairs, 800 based on Foata normal form. 1/1878 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-21 19:45:11,326 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 19:45:11,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-21 19:45:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:45:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:45:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 19:45:11,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-21 19:45:11,335 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-21 19:45:11,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-21 19:45:11,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:45:11,339 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 19:45:11,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 19:45:11,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 19:45:11,343 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 19:45:11,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:11,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:11,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:11,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:45:11,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:11,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:11,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1769248203, now seen corresponding path program 1 times [2024-06-21 19:45:11,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:11,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70089654] [2024-06-21 19:45:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:11,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:12,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:12,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70089654] [2024-06-21 19:45:12,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70089654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:12,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:12,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:45:12,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001200952] [2024-06-21 19:45:12,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:12,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:45:12,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:45:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:45:12,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 19:45:12,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 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 19:45:12,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:12,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 19:45:12,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:13,040 INFO L124 PetriNetUnfolderBase]: 1406/2140 cut-off events. [2024-06-21 19:45:13,041 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-21 19:45:13,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4899 conditions, 2140 events. 1406/2140 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10178 event pairs, 805 based on Foata normal form. 3/2142 useless extension candidates. Maximal degree in co-relation 4887. Up to 2087 conditions per place. [2024-06-21 19:45:13,050 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-21 19:45:13,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 262 flow [2024-06-21 19:45:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:45:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:45:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-21 19:45:13,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290697674418605 [2024-06-21 19:45:13,053 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 91 transitions. [2024-06-21 19:45:13,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 262 flow [2024-06-21 19:45:13,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:45:13,054 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 19:45:13,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 19:45:13,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 19:45:13,055 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 19:45:13,056 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 19:45:13,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:13,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:13,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:45:13,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:13,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash -559494902, now seen corresponding path program 1 times [2024-06-21 19:45:13,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:13,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498034365] [2024-06-21 19:45:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:13,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:15,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:15,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498034365] [2024-06-21 19:45:15,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498034365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:15,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:15,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:45:15,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325722060] [2024-06-21 19:45:15,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:15,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:45:15,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:45:15,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:45:15,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 19:45:15,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 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 19:45:15,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:15,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 19:45:15,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:15,964 INFO L124 PetriNetUnfolderBase]: 1399/2131 cut-off events. [2024-06-21 19:45:15,965 INFO L125 PetriNetUnfolderBase]: For 1149/1149 co-relation queries the response was YES. [2024-06-21 19:45:15,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 2131 events. 1399/2131 cut-off events. For 1149/1149 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10198 event pairs, 652 based on Foata normal form. 4/2134 useless extension candidates. Maximal degree in co-relation 5412. Up to 2041 conditions per place. [2024-06-21 19:45:15,979 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-21 19:45:15,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 404 flow [2024-06-21 19:45:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:45:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:45:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-21 19:45:15,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441860465116279 [2024-06-21 19:45:15,985 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 117 transitions. [2024-06-21 19:45:15,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 404 flow [2024-06-21 19:45:15,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 19:45:15,988 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 222 flow [2024-06-21 19:45:15,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-21 19:45:15,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-21 19:45:15,989 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 222 flow [2024-06-21 19:45:15,989 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 19:45:15,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:15,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:15,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:45:15,990 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:15,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:15,991 INFO L85 PathProgramCache]: Analyzing trace with hash 925391727, now seen corresponding path program 1 times [2024-06-21 19:45:15,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:15,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017530100] [2024-06-21 19:45:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:15,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:18,142 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 19:45:18,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:18,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017530100] [2024-06-21 19:45:18,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017530100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:18,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:18,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:45:18,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617796408] [2024-06-21 19:45:18,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:18,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:45:18,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:18,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:45:18,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:45:18,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 19:45:18,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:18,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:18,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 19:45:18,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:18,968 INFO L124 PetriNetUnfolderBase]: 1388/2114 cut-off events. [2024-06-21 19:45:18,968 INFO L125 PetriNetUnfolderBase]: For 2565/2565 co-relation queries the response was YES. [2024-06-21 19:45:18,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6220 conditions, 2114 events. 1388/2114 cut-off events. For 2565/2565 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10080 event pairs, 481 based on Foata normal form. 8/2121 useless extension candidates. Maximal degree in co-relation 6203. Up to 1974 conditions per place. [2024-06-21 19:45:18,980 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 65 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-21 19:45:18,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 496 flow [2024-06-21 19:45:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:45:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:45:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 19:45:18,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2024-06-21 19:45:18,982 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 222 flow. Second operand 6 states and 134 transitions. [2024-06-21 19:45:18,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 496 flow [2024-06-21 19:45:18,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 19:45:18,989 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 269 flow [2024-06-21 19:45:18,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 19:45:18,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-21 19:45:18,990 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 269 flow [2024-06-21 19:45:18,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:18,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:18,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:18,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:45:18,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:18,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash 368808262, now seen corresponding path program 1 times [2024-06-21 19:45:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:18,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939679439] [2024-06-21 19:45:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:18,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:20,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:20,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939679439] [2024-06-21 19:45:20,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939679439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:20,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:20,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:45:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884177589] [2024-06-21 19:45:20,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:20,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:45:20,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:20,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:45:20,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:45:20,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 19:45:20,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:20,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:20,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 19:45:20,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:21,673 INFO L124 PetriNetUnfolderBase]: 1292/2013 cut-off events. [2024-06-21 19:45:21,673 INFO L125 PetriNetUnfolderBase]: For 3963/3984 co-relation queries the response was YES. [2024-06-21 19:45:21,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6378 conditions, 2013 events. 1292/2013 cut-off events. For 3963/3984 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10133 event pairs, 732 based on Foata normal form. 4/1980 useless extension candidates. Maximal degree in co-relation 6357. Up to 1878 conditions per place. [2024-06-21 19:45:21,685 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 51 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-21 19:45:21,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 493 flow [2024-06-21 19:45:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:45:21,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:45:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-21 19:45:21,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 19:45:21,689 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 269 flow. Second operand 5 states and 99 transitions. [2024-06-21 19:45:21,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 493 flow [2024-06-21 19:45:21,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 458 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 19:45:21,697 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 333 flow [2024-06-21 19:45:21,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-21 19:45:21,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-21 19:45:21,699 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 333 flow [2024-06-21 19:45:21,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:21,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:21,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:21,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:45:21,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:21,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:21,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1410256414, now seen corresponding path program 1 times [2024-06-21 19:45:21,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:21,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648712371] [2024-06-21 19:45:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:21,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:23,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:23,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648712371] [2024-06-21 19:45:23,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648712371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:23,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:23,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:45:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092188305] [2024-06-21 19:45:23,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:23,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:45:23,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:45:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:45:23,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 19:45:23,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:23,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:23,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 19:45:23,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:24,155 INFO L124 PetriNetUnfolderBase]: 1287/2007 cut-off events. [2024-06-21 19:45:24,155 INFO L125 PetriNetUnfolderBase]: For 5339/5362 co-relation queries the response was YES. [2024-06-21 19:45:24,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6947 conditions, 2007 events. 1287/2007 cut-off events. For 5339/5362 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10121 event pairs, 731 based on Foata normal form. 6/1977 useless extension candidates. Maximal degree in co-relation 6921. Up to 1875 conditions per place. [2024-06-21 19:45:24,168 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 51 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-21 19:45:24,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 76 transitions, 541 flow [2024-06-21 19:45:24,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:45:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:45:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-21 19:45:24,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 19:45:24,169 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 333 flow. Second operand 5 states and 99 transitions. [2024-06-21 19:45:24,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 76 transitions, 541 flow [2024-06-21 19:45:24,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 539 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-21 19:45:24,175 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 393 flow [2024-06-21 19:45:24,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=393, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-21 19:45:24,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-21 19:45:24,177 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 393 flow [2024-06-21 19:45:24,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:24,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:24,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:24,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:45:24,178 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:24,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:24,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1608307455, now seen corresponding path program 1 times [2024-06-21 19:45:24,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:24,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453423785] [2024-06-21 19:45:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:24,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:25,713 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 19:45:25,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:25,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453423785] [2024-06-21 19:45:25,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453423785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:25,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:25,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:45:25,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967944327] [2024-06-21 19:45:25,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:25,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:45:25,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:45:25,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:45:25,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:45:25,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 393 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:25,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:25,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:45:25,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:27,142 INFO L124 PetriNetUnfolderBase]: 1454/2218 cut-off events. [2024-06-21 19:45:27,142 INFO L125 PetriNetUnfolderBase]: For 6468/6470 co-relation queries the response was YES. [2024-06-21 19:45:27,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8030 conditions, 2218 events. 1454/2218 cut-off events. For 6468/6470 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10558 event pairs, 540 based on Foata normal form. 2/2219 useless extension candidates. Maximal degree in co-relation 7999. Up to 2004 conditions per place. [2024-06-21 19:45:27,165 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 79 selfloop transitions, 28 changer transitions 0/112 dead transitions. [2024-06-21 19:45:27,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 854 flow [2024-06-21 19:45:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:45:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:45:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 19:45:27,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-21 19:45:27,166 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 393 flow. Second operand 7 states and 143 transitions. [2024-06-21 19:45:27,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 854 flow [2024-06-21 19:45:27,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 838 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:45:27,173 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 555 flow [2024-06-21 19:45:27,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=555, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-21 19:45:27,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-21 19:45:27,174 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 555 flow [2024-06-21 19:45:27,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:27,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:27,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:27,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:45:27,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:27,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:27,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2064169339, now seen corresponding path program 2 times [2024-06-21 19:45:27,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:27,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808646821] [2024-06-21 19:45:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:27,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:29,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:29,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808646821] [2024-06-21 19:45:29,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808646821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:29,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:29,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:45:29,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722228252] [2024-06-21 19:45:29,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:29,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:45:29,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:45:29,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:45:29,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:45:29,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 555 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:29,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:29,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:45:29,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:30,323 INFO L124 PetriNetUnfolderBase]: 1518/2317 cut-off events. [2024-06-21 19:45:30,324 INFO L125 PetriNetUnfolderBase]: For 9617/9621 co-relation queries the response was YES. [2024-06-21 19:45:30,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9371 conditions, 2317 events. 1518/2317 cut-off events. For 9617/9621 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11118 event pairs, 549 based on Foata normal form. 3/2317 useless extension candidates. Maximal degree in co-relation 9336. Up to 2051 conditions per place. [2024-06-21 19:45:30,340 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 41 changer transitions 0/116 dead transitions. [2024-06-21 19:45:30,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 116 transitions, 1050 flow [2024-06-21 19:45:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:45:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:45:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 19:45:30,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 19:45:30,341 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 555 flow. Second operand 6 states and 121 transitions. [2024-06-21 19:45:30,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 116 transitions, 1050 flow [2024-06-21 19:45:30,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 116 transitions, 983 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 19:45:30,353 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 751 flow [2024-06-21 19:45:30,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2024-06-21 19:45:30,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-21 19:45:30,354 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 751 flow [2024-06-21 19:45:30,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:30,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:30,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:30,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:45:30,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:30,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1911461255, now seen corresponding path program 3 times [2024-06-21 19:45:30,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:30,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911233079] [2024-06-21 19:45:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:30,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:32,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:32,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911233079] [2024-06-21 19:45:32,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911233079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:32,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:32,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:45:32,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961457305] [2024-06-21 19:45:32,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:32,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:45:32,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:32,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:45:32,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:45:32,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:45:32,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 751 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:32,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:32,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:45:32,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:33,415 INFO L124 PetriNetUnfolderBase]: 1510/2302 cut-off events. [2024-06-21 19:45:33,415 INFO L125 PetriNetUnfolderBase]: For 11610/11612 co-relation queries the response was YES. [2024-06-21 19:45:33,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9732 conditions, 2302 events. 1510/2302 cut-off events. For 11610/11612 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11001 event pairs, 553 based on Foata normal form. 3/2301 useless extension candidates. Maximal degree in co-relation 9694. Up to 2046 conditions per place. [2024-06-21 19:45:33,429 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 65 selfloop transitions, 47 changer transitions 0/117 dead transitions. [2024-06-21 19:45:33,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 117 transitions, 1129 flow [2024-06-21 19:45:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:45:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:45:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 19:45:33,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 19:45:33,430 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 751 flow. Second operand 6 states and 114 transitions. [2024-06-21 19:45:33,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 117 transitions, 1129 flow [2024-06-21 19:45:33,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 117 transitions, 1083 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-21 19:45:33,439 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 869 flow [2024-06-21 19:45:33,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=869, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-06-21 19:45:33,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-21 19:45:33,439 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 869 flow [2024-06-21 19:45:33,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:33,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:33,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:33,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:45:33,441 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:33,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -768274231, now seen corresponding path program 1 times [2024-06-21 19:45:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:33,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294474058] [2024-06-21 19:45:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:35,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:35,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294474058] [2024-06-21 19:45:35,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294474058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:35,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:35,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:45:35,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808518827] [2024-06-21 19:45:35,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:45:35,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:45:35,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:45:35,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 19:45:35,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 869 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:35,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:35,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 19:45:35,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:36,532 INFO L124 PetriNetUnfolderBase]: 1416/2204 cut-off events. [2024-06-21 19:45:36,533 INFO L125 PetriNetUnfolderBase]: For 14830/14872 co-relation queries the response was YES. [2024-06-21 19:45:36,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9774 conditions, 2204 events. 1416/2204 cut-off events. For 14830/14872 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11014 event pairs, 715 based on Foata normal form. 8/2176 useless extension candidates. Maximal degree in co-relation 9732. Up to 2068 conditions per place. [2024-06-21 19:45:36,545 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 84 selfloop transitions, 14 changer transitions 0/108 dead transitions. [2024-06-21 19:45:36,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 108 transitions, 1101 flow [2024-06-21 19:45:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:45:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:45:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-21 19:45:36,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-21 19:45:36,547 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 869 flow. Second operand 5 states and 97 transitions. [2024-06-21 19:45:36,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 108 transitions, 1101 flow [2024-06-21 19:45:36,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 108 transitions, 1037 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 19:45:36,557 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 845 flow [2024-06-21 19:45:36,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=845, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-21 19:45:36,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-21 19:45:36,558 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 845 flow [2024-06-21 19:45:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:45:36,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:36,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:36,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:45:36,559 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:36,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1682078059, now seen corresponding path program 1 times [2024-06-21 19:45:36,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:36,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182893703] [2024-06-21 19:45:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:36,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:38,168 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 19:45:38,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:38,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182893703] [2024-06-21 19:45:38,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182893703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:38,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:38,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:45:38,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861679643] [2024-06-21 19:45:38,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:38,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:45:38,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:38,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:45:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:45:38,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:45:38,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 845 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 19:45:38,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:38,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:45:38,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:39,154 INFO L124 PetriNetUnfolderBase]: 1509/2309 cut-off events. [2024-06-21 19:45:39,154 INFO L125 PetriNetUnfolderBase]: For 15936/15940 co-relation queries the response was YES. [2024-06-21 19:45:39,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10117 conditions, 2309 events. 1509/2309 cut-off events. For 15936/15940 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11046 event pairs, 541 based on Foata normal form. 5/2313 useless extension candidates. Maximal degree in co-relation 10072. Up to 2046 conditions per place. [2024-06-21 19:45:39,167 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 79 selfloop transitions, 51 changer transitions 0/135 dead transitions. [2024-06-21 19:45:39,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 135 transitions, 1346 flow [2024-06-21 19:45:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:45:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:45:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 19:45:39,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 19:45:39,169 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 845 flow. Second operand 7 states and 141 transitions. [2024-06-21 19:45:39,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 135 transitions, 1346 flow [2024-06-21 19:45:39,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 135 transitions, 1332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 19:45:39,184 INFO L231 Difference]: Finished difference. Result has 90 places, 102 transitions, 1048 flow [2024-06-21 19:45:39,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1048, PETRI_PLACES=90, PETRI_TRANSITIONS=102} [2024-06-21 19:45:39,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-21 19:45:39,185 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 102 transitions, 1048 flow [2024-06-21 19:45:39,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 19:45:39,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:39,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:39,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:45:39,185 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:39,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:39,186 INFO L85 PathProgramCache]: Analyzing trace with hash -419184269, now seen corresponding path program 2 times [2024-06-21 19:45:39,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:39,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592702038] [2024-06-21 19:45:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:39,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:41,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:41,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592702038] [2024-06-21 19:45:41,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592702038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:41,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:41,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:45:41,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571780574] [2024-06-21 19:45:41,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:41,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:45:41,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:41,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:45:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:45:41,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:45:41,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 102 transitions, 1048 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 19:45:41,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:41,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:45:41,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:42,207 INFO L124 PetriNetUnfolderBase]: 1531/2346 cut-off events. [2024-06-21 19:45:42,207 INFO L125 PetriNetUnfolderBase]: For 19529/19535 co-relation queries the response was YES. [2024-06-21 19:45:42,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10935 conditions, 2346 events. 1531/2346 cut-off events. For 19529/19535 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11235 event pairs, 545 based on Foata normal form. 4/2347 useless extension candidates. Maximal degree in co-relation 10887. Up to 2060 conditions per place. [2024-06-21 19:45:42,238 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 56 changer transitions 0/132 dead transitions. [2024-06-21 19:45:42,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 132 transitions, 1533 flow [2024-06-21 19:45:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:45:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:45:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 19:45:42,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 19:45:42,262 INFO L175 Difference]: Start difference. First operand has 90 places, 102 transitions, 1048 flow. Second operand 6 states and 121 transitions. [2024-06-21 19:45:42,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 132 transitions, 1533 flow [2024-06-21 19:45:42,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 132 transitions, 1438 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 19:45:42,282 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 1161 flow [2024-06-21 19:45:42,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1161, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-21 19:45:42,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-21 19:45:42,284 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 1161 flow [2024-06-21 19:45:42,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 19:45:42,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:42,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:42,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:45:42,285 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:42,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:42,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1911289059, now seen corresponding path program 3 times [2024-06-21 19:45:42,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:42,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406451361] [2024-06-21 19:45:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:42,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:44,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:44,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406451361] [2024-06-21 19:45:44,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406451361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:44,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:44,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:45:44,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663692635] [2024-06-21 19:45:44,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:44,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:45:44,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:44,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:45:44,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:45:44,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:45:44,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 1161 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 19:45:44,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:44,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:45:44,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:45,270 INFO L124 PetriNetUnfolderBase]: 1523/2330 cut-off events. [2024-06-21 19:45:45,270 INFO L125 PetriNetUnfolderBase]: For 22471/22483 co-relation queries the response was YES. [2024-06-21 19:45:45,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11178 conditions, 2330 events. 1523/2330 cut-off events. For 22471/22483 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11175 event pairs, 553 based on Foata normal form. 15/2341 useless extension candidates. Maximal degree in co-relation 11128. Up to 2055 conditions per place. [2024-06-21 19:45:45,300 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 67 selfloop transitions, 62 changer transitions 0/134 dead transitions. [2024-06-21 19:45:45,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1601 flow [2024-06-21 19:45:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:45:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:45:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 19:45:45,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 19:45:45,318 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 1161 flow. Second operand 6 states and 114 transitions. [2024-06-21 19:45:45,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1601 flow [2024-06-21 19:45:45,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 134 transitions, 1519 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 19:45:45,338 INFO L231 Difference]: Finished difference. Result has 95 places, 113 transitions, 1285 flow [2024-06-21 19:45:45,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1285, PETRI_PLACES=95, PETRI_TRANSITIONS=113} [2024-06-21 19:45:45,339 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-21 19:45:45,339 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 113 transitions, 1285 flow [2024-06-21 19:45:45,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 19:45:45,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:45,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:45,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:45:45,340 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:45,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1911298979, now seen corresponding path program 1 times [2024-06-21 19:45:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:45,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823195852] [2024-06-21 19:45:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:45,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:48,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:48,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823195852] [2024-06-21 19:45:48,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823195852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:48,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:48,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:45:48,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456342024] [2024-06-21 19:45:48,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:48,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:45:48,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:45:48,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:45:48,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 19:45:48,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 113 transitions, 1285 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 19:45:48,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:48,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 19:45:48,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:49,176 INFO L124 PetriNetUnfolderBase]: 1426/2226 cut-off events. [2024-06-21 19:45:49,176 INFO L125 PetriNetUnfolderBase]: For 26060/26102 co-relation queries the response was YES. [2024-06-21 19:45:49,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11227 conditions, 2226 events. 1426/2226 cut-off events. For 26060/26102 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11067 event pairs, 680 based on Foata normal form. 10/2201 useless extension candidates. Maximal degree in co-relation 11174. Up to 2061 conditions per place. [2024-06-21 19:45:49,189 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 108 selfloop transitions, 16 changer transitions 0/134 dead transitions. [2024-06-21 19:45:49,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 134 transitions, 1603 flow [2024-06-21 19:45:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:45:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:45:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 19:45:49,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-21 19:45:49,191 INFO L175 Difference]: Start difference. First operand has 95 places, 113 transitions, 1285 flow. Second operand 7 states and 123 transitions. [2024-06-21 19:45:49,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 134 transitions, 1603 flow [2024-06-21 19:45:49,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 134 transitions, 1529 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 19:45:49,214 INFO L231 Difference]: Finished difference. Result has 100 places, 115 transitions, 1272 flow [2024-06-21 19:45:49,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1272, PETRI_PLACES=100, PETRI_TRANSITIONS=115} [2024-06-21 19:45:49,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-21 19:45:49,215 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 115 transitions, 1272 flow [2024-06-21 19:45:49,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 19:45:49,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:49,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:49,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:45:49,216 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:49,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:49,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1707520640, now seen corresponding path program 1 times [2024-06-21 19:45:49,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:49,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291346455] [2024-06-21 19:45:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:49,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:51,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:51,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291346455] [2024-06-21 19:45:51,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291346455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:51,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:51,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:45:51,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408924094] [2024-06-21 19:45:51,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:51,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:45:51,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:45:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:45:51,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:45:51,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 115 transitions, 1272 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:45:51,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:51,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:45:51,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:52,925 INFO L124 PetriNetUnfolderBase]: 1637/2514 cut-off events. [2024-06-21 19:45:52,925 INFO L125 PetriNetUnfolderBase]: For 27516/27516 co-relation queries the response was YES. [2024-06-21 19:45:52,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12494 conditions, 2514 events. 1637/2514 cut-off events. For 27516/27516 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12253 event pairs, 425 based on Foata normal form. 3/2516 useless extension candidates. Maximal degree in co-relation 12439. Up to 2283 conditions per place. [2024-06-21 19:45:52,946 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 139 selfloop transitions, 39 changer transitions 0/183 dead transitions. [2024-06-21 19:45:52,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 183 transitions, 2072 flow [2024-06-21 19:45:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:45:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:45:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 19:45:52,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 19:45:52,948 INFO L175 Difference]: Start difference. First operand has 100 places, 115 transitions, 1272 flow. Second operand 9 states and 176 transitions. [2024-06-21 19:45:52,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 183 transitions, 2072 flow [2024-06-21 19:45:52,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 183 transitions, 2021 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:45:52,974 INFO L231 Difference]: Finished difference. Result has 107 places, 135 transitions, 1500 flow [2024-06-21 19:45:52,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1500, PETRI_PLACES=107, PETRI_TRANSITIONS=135} [2024-06-21 19:45:52,975 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-21 19:45:52,975 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 135 transitions, 1500 flow [2024-06-21 19:45:52,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:45:52,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:52,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:52,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:45:52,976 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:52,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:52,976 INFO L85 PathProgramCache]: Analyzing trace with hash -683057954, now seen corresponding path program 2 times [2024-06-21 19:45:52,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:52,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534062636] [2024-06-21 19:45:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:52,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534062636] [2024-06-21 19:45:55,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534062636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:55,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:55,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:45:55,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845644871] [2024-06-21 19:45:55,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:55,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:45:55,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:55,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:45:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:45:55,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:45:55,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 135 transitions, 1500 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:45:55,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:55,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:45:55,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:57,071 INFO L124 PetriNetUnfolderBase]: 1787/2729 cut-off events. [2024-06-21 19:45:57,072 INFO L125 PetriNetUnfolderBase]: For 35375/35377 co-relation queries the response was YES. [2024-06-21 19:45:57,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14738 conditions, 2729 events. 1787/2729 cut-off events. For 35375/35377 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13603 event pairs, 486 based on Foata normal form. 3/2730 useless extension candidates. Maximal degree in co-relation 14680. Up to 1927 conditions per place. [2024-06-21 19:45:57,090 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 142 selfloop transitions, 58 changer transitions 0/205 dead transitions. [2024-06-21 19:45:57,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 205 transitions, 2516 flow [2024-06-21 19:45:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:45:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:45:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 19:45:57,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 19:45:57,092 INFO L175 Difference]: Start difference. First operand has 107 places, 135 transitions, 1500 flow. Second operand 8 states and 168 transitions. [2024-06-21 19:45:57,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 205 transitions, 2516 flow [2024-06-21 19:45:57,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 205 transitions, 2471 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 19:45:57,125 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1775 flow [2024-06-21 19:45:57,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1775, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2024-06-21 19:45:57,126 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-21 19:45:57,126 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1775 flow [2024-06-21 19:45:57,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:45:57,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:45:57,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:45:57,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:45:57,127 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:45:57,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:45:57,127 INFO L85 PathProgramCache]: Analyzing trace with hash -902348258, now seen corresponding path program 3 times [2024-06-21 19:45:57,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:45:57,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343631413] [2024-06-21 19:45:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:45:57,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:45:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:45:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:45:58,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:45:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343631413] [2024-06-21 19:45:58,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343631413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:45:58,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:45:58,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:45:58,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728793697] [2024-06-21 19:45:58,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:45:58,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:45:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:45:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:45:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:45:58,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:45:58,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1775 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:45:58,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:45:58,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:45:58,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:45:59,932 INFO L124 PetriNetUnfolderBase]: 1991/3038 cut-off events. [2024-06-21 19:45:59,932 INFO L125 PetriNetUnfolderBase]: For 44661/44661 co-relation queries the response was YES. [2024-06-21 19:45:59,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18141 conditions, 3038 events. 1991/3038 cut-off events. For 44661/44661 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15109 event pairs, 490 based on Foata normal form. 2/3039 useless extension candidates. Maximal degree in co-relation 18078. Up to 2666 conditions per place. [2024-06-21 19:45:59,953 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 174 selfloop transitions, 58 changer transitions 0/237 dead transitions. [2024-06-21 19:45:59,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 237 transitions, 2980 flow [2024-06-21 19:45:59,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:45:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:45:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 19:45:59,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 19:45:59,956 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1775 flow. Second operand 8 states and 160 transitions. [2024-06-21 19:45:59,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 237 transitions, 2980 flow [2024-06-21 19:45:59,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 237 transitions, 2917 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:00,002 INFO L231 Difference]: Finished difference. Result has 124 places, 188 transitions, 2308 flow [2024-06-21 19:46:00,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2308, PETRI_PLACES=124, PETRI_TRANSITIONS=188} [2024-06-21 19:46:00,003 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 19:46:00,003 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 188 transitions, 2308 flow [2024-06-21 19:46:00,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:46:00,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:00,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:00,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:46:00,004 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:00,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:00,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2128781348, now seen corresponding path program 1 times [2024-06-21 19:46:00,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:00,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72068205] [2024-06-21 19:46:00,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:00,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:02,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:02,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72068205] [2024-06-21 19:46:02,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72068205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:02,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:02,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:46:02,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459646219] [2024-06-21 19:46:02,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:02,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:46:02,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:46:02,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:46:02,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:02,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 188 transitions, 2308 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:02,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:02,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:02,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:03,229 INFO L124 PetriNetUnfolderBase]: 1995/3053 cut-off events. [2024-06-21 19:46:03,229 INFO L125 PetriNetUnfolderBase]: For 51919/51925 co-relation queries the response was YES. [2024-06-21 19:46:03,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19101 conditions, 3053 events. 1995/3053 cut-off events. For 51919/51925 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15241 event pairs, 551 based on Foata normal form. 7/3059 useless extension candidates. Maximal degree in co-relation 19034. Up to 2727 conditions per place. [2024-06-21 19:46:03,253 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 62 changer transitions 0/223 dead transitions. [2024-06-21 19:46:03,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 223 transitions, 3007 flow [2024-06-21 19:46:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:46:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:46:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 19:46:03,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 19:46:03,255 INFO L175 Difference]: Start difference. First operand has 124 places, 188 transitions, 2308 flow. Second operand 7 states and 141 transitions. [2024-06-21 19:46:03,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 223 transitions, 3007 flow [2024-06-21 19:46:03,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 223 transitions, 2940 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 19:46:03,313 INFO L231 Difference]: Finished difference. Result has 128 places, 191 transitions, 2426 flow [2024-06-21 19:46:03,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2426, PETRI_PLACES=128, PETRI_TRANSITIONS=191} [2024-06-21 19:46:03,314 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-21 19:46:03,314 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 191 transitions, 2426 flow [2024-06-21 19:46:03,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:03,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:03,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:03,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:46:03,315 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:03,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:03,315 INFO L85 PathProgramCache]: Analyzing trace with hash -114577352, now seen corresponding path program 4 times [2024-06-21 19:46:03,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:03,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30009297] [2024-06-21 19:46:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:03,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:06,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:06,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30009297] [2024-06-21 19:46:06,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30009297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:06,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:06,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:06,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653445113] [2024-06-21 19:46:06,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:06,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:06,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:06,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:06,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:06,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:06,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 191 transitions, 2426 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:46:06,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:06,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:06,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:07,747 INFO L124 PetriNetUnfolderBase]: 2158/3267 cut-off events. [2024-06-21 19:46:07,747 INFO L125 PetriNetUnfolderBase]: For 57552/57552 co-relation queries the response was YES. [2024-06-21 19:46:07,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21063 conditions, 3267 events. 2158/3267 cut-off events. For 57552/57552 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16238 event pairs, 509 based on Foata normal form. 5/3267 useless extension candidates. Maximal degree in co-relation 20994. Up to 2913 conditions per place. [2024-06-21 19:46:07,782 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 186 selfloop transitions, 86 changer transitions 0/277 dead transitions. [2024-06-21 19:46:07,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 277 transitions, 3864 flow [2024-06-21 19:46:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:46:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:46:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 19:46:07,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 19:46:07,784 INFO L175 Difference]: Start difference. First operand has 128 places, 191 transitions, 2426 flow. Second operand 9 states and 165 transitions. [2024-06-21 19:46:07,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 277 transitions, 3864 flow [2024-06-21 19:46:07,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 277 transitions, 3764 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 19:46:07,848 INFO L231 Difference]: Finished difference. Result has 135 places, 239 transitions, 3210 flow [2024-06-21 19:46:07,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3210, PETRI_PLACES=135, PETRI_TRANSITIONS=239} [2024-06-21 19:46:07,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 19:46:07,849 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 239 transitions, 3210 flow [2024-06-21 19:46:07,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:46:07,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:07,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:07,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:46:07,849 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:07,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2114271284, now seen corresponding path program 5 times [2024-06-21 19:46:07,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:07,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528248044] [2024-06-21 19:46:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:07,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:10,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:10,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528248044] [2024-06-21 19:46:10,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528248044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:10,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:10,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:10,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835032645] [2024-06-21 19:46:10,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:10,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:10,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:10,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:10,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 239 transitions, 3210 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:46:10,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:10,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:10,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:12,547 INFO L124 PetriNetUnfolderBase]: 2338/3545 cut-off events. [2024-06-21 19:46:12,548 INFO L125 PetriNetUnfolderBase]: For 71254/71260 co-relation queries the response was YES. [2024-06-21 19:46:12,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24097 conditions, 3545 events. 2338/3545 cut-off events. For 71254/71260 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18183 event pairs, 589 based on Foata normal form. 6/3546 useless extension candidates. Maximal degree in co-relation 24025. Up to 2269 conditions per place. [2024-06-21 19:46:12,577 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 163 selfloop transitions, 140 changer transitions 0/308 dead transitions. [2024-06-21 19:46:12,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 308 transitions, 4636 flow [2024-06-21 19:46:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:46:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:46:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 19:46:12,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-21 19:46:12,579 INFO L175 Difference]: Start difference. First operand has 135 places, 239 transitions, 3210 flow. Second operand 7 states and 146 transitions. [2024-06-21 19:46:12,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 308 transitions, 4636 flow [2024-06-21 19:46:12,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 308 transitions, 4540 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:12,661 INFO L231 Difference]: Finished difference. Result has 141 places, 266 transitions, 3811 flow [2024-06-21 19:46:12,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3811, PETRI_PLACES=141, PETRI_TRANSITIONS=266} [2024-06-21 19:46:12,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-21 19:46:12,662 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 266 transitions, 3811 flow [2024-06-21 19:46:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:46:12,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:12,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:12,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:46:12,663 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:12,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:12,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1331781304, now seen corresponding path program 6 times [2024-06-21 19:46:12,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:12,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567659514] [2024-06-21 19:46:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:12,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:15,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:15,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567659514] [2024-06-21 19:46:15,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567659514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:15,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:15,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:15,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753209877] [2024-06-21 19:46:15,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:15,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:15,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:15,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:15,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:15,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:15,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 266 transitions, 3811 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:46:15,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:15,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:15,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:17,007 INFO L124 PetriNetUnfolderBase]: 2328/3518 cut-off events. [2024-06-21 19:46:17,007 INFO L125 PetriNetUnfolderBase]: For 80623/80625 co-relation queries the response was YES. [2024-06-21 19:46:17,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25322 conditions, 3518 events. 2328/3518 cut-off events. For 80623/80625 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17946 event pairs, 618 based on Foata normal form. 5/3515 useless extension candidates. Maximal degree in co-relation 25246. Up to 2266 conditions per place. [2024-06-21 19:46:17,034 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 150 selfloop transitions, 159 changer transitions 0/314 dead transitions. [2024-06-21 19:46:17,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 314 transitions, 5016 flow [2024-06-21 19:46:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:46:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:46:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 19:46:17,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 19:46:17,038 INFO L175 Difference]: Start difference. First operand has 141 places, 266 transitions, 3811 flow. Second operand 7 states and 139 transitions. [2024-06-21 19:46:17,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 314 transitions, 5016 flow [2024-06-21 19:46:17,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 314 transitions, 4866 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:17,144 INFO L231 Difference]: Finished difference. Result has 148 places, 278 transitions, 4286 flow [2024-06-21 19:46:17,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3668, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4286, PETRI_PLACES=148, PETRI_TRANSITIONS=278} [2024-06-21 19:46:17,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-21 19:46:17,145 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 278 transitions, 4286 flow [2024-06-21 19:46:17,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 19:46:17,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:17,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:17,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:46:17,146 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:17,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:17,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1754544810, now seen corresponding path program 2 times [2024-06-21 19:46:17,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:17,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509616888] [2024-06-21 19:46:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:17,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:19,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:19,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509616888] [2024-06-21 19:46:19,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509616888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:19,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:19,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:19,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117825346] [2024-06-21 19:46:19,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:19,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:19,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:19,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:19,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:19,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 278 transitions, 4286 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:19,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:19,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:19,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:21,539 INFO L124 PetriNetUnfolderBase]: 2350/3577 cut-off events. [2024-06-21 19:46:21,539 INFO L125 PetriNetUnfolderBase]: For 92381/92387 co-relation queries the response was YES. [2024-06-21 19:46:21,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26516 conditions, 3577 events. 2350/3577 cut-off events. For 92381/92387 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18459 event pairs, 598 based on Foata normal form. 4/3578 useless extension candidates. Maximal degree in co-relation 26435. Up to 3220 conditions per place. [2024-06-21 19:46:21,571 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 236 selfloop transitions, 69 changer transitions 0/310 dead transitions. [2024-06-21 19:46:21,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 310 transitions, 5161 flow [2024-06-21 19:46:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:46:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:46:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 19:46:21,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 19:46:21,597 INFO L175 Difference]: Start difference. First operand has 148 places, 278 transitions, 4286 flow. Second operand 7 states and 136 transitions. [2024-06-21 19:46:21,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 310 transitions, 5161 flow [2024-06-21 19:46:21,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 310 transitions, 5096 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-06-21 19:46:21,725 INFO L231 Difference]: Finished difference. Result has 154 places, 284 transitions, 4472 flow [2024-06-21 19:46:21,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4221, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4472, PETRI_PLACES=154, PETRI_TRANSITIONS=284} [2024-06-21 19:46:21,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-21 19:46:21,725 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 284 transitions, 4472 flow [2024-06-21 19:46:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:21,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:21,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:21,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:46:21,726 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:21,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:21,727 INFO L85 PathProgramCache]: Analyzing trace with hash -879579672, now seen corresponding path program 3 times [2024-06-21 19:46:21,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:21,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819371555] [2024-06-21 19:46:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:21,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:24,485 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 19:46:24,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:24,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819371555] [2024-06-21 19:46:24,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819371555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:24,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:24,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:46:24,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003678373] [2024-06-21 19:46:24,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:24,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:46:24,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:46:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:46:24,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:24,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 284 transitions, 4472 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:24,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:24,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:24,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:25,719 INFO L124 PetriNetUnfolderBase]: 2342/3563 cut-off events. [2024-06-21 19:46:25,719 INFO L125 PetriNetUnfolderBase]: For 97453/97465 co-relation queries the response was YES. [2024-06-21 19:46:25,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26760 conditions, 3563 events. 2342/3563 cut-off events. For 97453/97465 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18350 event pairs, 591 based on Foata normal form. 15/3574 useless extension candidates. Maximal degree in co-relation 26675. Up to 3212 conditions per place. [2024-06-21 19:46:25,750 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 231 selfloop transitions, 67 changer transitions 0/303 dead transitions. [2024-06-21 19:46:25,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 303 transitions, 5152 flow [2024-06-21 19:46:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:46:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:46:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 19:46:25,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-21 19:46:25,752 INFO L175 Difference]: Start difference. First operand has 154 places, 284 transitions, 4472 flow. Second operand 6 states and 113 transitions. [2024-06-21 19:46:25,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 303 transitions, 5152 flow [2024-06-21 19:46:25,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 303 transitions, 5020 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 19:46:25,885 INFO L231 Difference]: Finished difference. Result has 156 places, 284 transitions, 4492 flow [2024-06-21 19:46:25,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4492, PETRI_PLACES=156, PETRI_TRANSITIONS=284} [2024-06-21 19:46:25,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-21 19:46:25,886 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 284 transitions, 4492 flow [2024-06-21 19:46:25,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:25,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:25,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:25,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:46:25,887 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:25,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash 567601714, now seen corresponding path program 1 times [2024-06-21 19:46:25,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:25,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999551417] [2024-06-21 19:46:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:25,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:28,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999551417] [2024-06-21 19:46:28,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999551417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:28,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:28,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:46:28,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626316469] [2024-06-21 19:46:28,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:28,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:46:28,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:46:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:46:28,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 19:46:28,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 284 transitions, 4492 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:28,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:28,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 19:46:28,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:29,553 INFO L124 PetriNetUnfolderBase]: 2272/3482 cut-off events. [2024-06-21 19:46:29,554 INFO L125 PetriNetUnfolderBase]: For 104358/104419 co-relation queries the response was YES. [2024-06-21 19:46:29,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26567 conditions, 3482 events. 2272/3482 cut-off events. For 104358/104419 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18246 event pairs, 798 based on Foata normal form. 13/3442 useless extension candidates. Maximal degree in co-relation 26480. Up to 3188 conditions per place. [2024-06-21 19:46:29,589 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 237 selfloop transitions, 12 changer transitions 0/297 dead transitions. [2024-06-21 19:46:29,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 297 transitions, 5046 flow [2024-06-21 19:46:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:46:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:46:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 19:46:29,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-21 19:46:29,590 INFO L175 Difference]: Start difference. First operand has 156 places, 284 transitions, 4492 flow. Second operand 5 states and 91 transitions. [2024-06-21 19:46:29,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 297 transitions, 5046 flow [2024-06-21 19:46:29,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 297 transitions, 4973 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-21 19:46:29,727 INFO L231 Difference]: Finished difference. Result has 159 places, 287 transitions, 4483 flow [2024-06-21 19:46:29,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4419, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4483, PETRI_PLACES=159, PETRI_TRANSITIONS=287} [2024-06-21 19:46:29,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-21 19:46:29,728 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 287 transitions, 4483 flow [2024-06-21 19:46:29,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:29,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:29,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:29,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:46:29,728 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:29,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:29,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1393533900, now seen corresponding path program 1 times [2024-06-21 19:46:29,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:29,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064497383] [2024-06-21 19:46:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:29,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:32,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:32,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064497383] [2024-06-21 19:46:32,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064497383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:32,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:32,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:32,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090424240] [2024-06-21 19:46:32,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:32,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:32,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:32,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:32,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:32,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 287 transitions, 4483 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:32,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:32,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:32,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:33,719 INFO L124 PetriNetUnfolderBase]: 2307/3504 cut-off events. [2024-06-21 19:46:33,719 INFO L125 PetriNetUnfolderBase]: For 102705/102705 co-relation queries the response was YES. [2024-06-21 19:46:33,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26602 conditions, 3504 events. 2307/3504 cut-off events. For 102705/102705 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17814 event pairs, 497 based on Foata normal form. 12/3515 useless extension candidates. Maximal degree in co-relation 26512. Up to 3157 conditions per place. [2024-06-21 19:46:33,750 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 245 selfloop transitions, 81 changer transitions 0/331 dead transitions. [2024-06-21 19:46:33,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 331 transitions, 5430 flow [2024-06-21 19:46:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:46:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:46:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 19:46:33,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 19:46:33,752 INFO L175 Difference]: Start difference. First operand has 159 places, 287 transitions, 4483 flow. Second operand 9 states and 173 transitions. [2024-06-21 19:46:33,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 331 transitions, 5430 flow [2024-06-21 19:46:33,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 331 transitions, 5365 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 19:46:33,903 INFO L231 Difference]: Finished difference. Result has 164 places, 287 transitions, 4602 flow [2024-06-21 19:46:33,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4602, PETRI_PLACES=164, PETRI_TRANSITIONS=287} [2024-06-21 19:46:33,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-21 19:46:33,904 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 287 transitions, 4602 flow [2024-06-21 19:46:33,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:33,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:33,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:33,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:46:33,905 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:33,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:33,905 INFO L85 PathProgramCache]: Analyzing trace with hash 300041518, now seen corresponding path program 2 times [2024-06-21 19:46:33,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:33,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904872739] [2024-06-21 19:46:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:33,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:36,874 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 19:46:36,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:36,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904872739] [2024-06-21 19:46:36,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904872739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:36,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:36,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:46:36,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743223034] [2024-06-21 19:46:36,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:36,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:46:36,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:46:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:46:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:36,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 287 transitions, 4602 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 19:46:36,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:36,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:36,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:38,696 INFO L124 PetriNetUnfolderBase]: 2379/3616 cut-off events. [2024-06-21 19:46:38,696 INFO L125 PetriNetUnfolderBase]: For 112769/112771 co-relation queries the response was YES. [2024-06-21 19:46:38,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27843 conditions, 3616 events. 2379/3616 cut-off events. For 112769/112771 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18660 event pairs, 567 based on Foata normal form. 10/3625 useless extension candidates. Maximal degree in co-relation 27752. Up to 2312 conditions per place. [2024-06-21 19:46:38,733 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 188 selfloop transitions, 165 changer transitions 0/358 dead transitions. [2024-06-21 19:46:38,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 358 transitions, 6166 flow [2024-06-21 19:46:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:46:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:46:38,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 19:46:38,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-21 19:46:38,735 INFO L175 Difference]: Start difference. First operand has 164 places, 287 transitions, 4602 flow. Second operand 9 states and 185 transitions. [2024-06-21 19:46:38,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 358 transitions, 6166 flow [2024-06-21 19:46:38,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 358 transitions, 6034 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:46:38,928 INFO L231 Difference]: Finished difference. Result has 167 places, 294 transitions, 4927 flow [2024-06-21 19:46:38,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4470, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4927, PETRI_PLACES=167, PETRI_TRANSITIONS=294} [2024-06-21 19:46:38,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-21 19:46:38,929 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 294 transitions, 4927 flow [2024-06-21 19:46:38,929 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 19:46:38,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:38,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:38,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:46:38,930 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:38,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1611361384, now seen corresponding path program 3 times [2024-06-21 19:46:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:38,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111846772] [2024-06-21 19:46:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:38,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:41,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:41,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111846772] [2024-06-21 19:46:41,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111846772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:41,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:41,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:41,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873068447] [2024-06-21 19:46:41,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:41,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:41,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:41,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:41,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:41,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 294 transitions, 4927 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:41,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:41,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:43,050 INFO L124 PetriNetUnfolderBase]: 2495/3790 cut-off events. [2024-06-21 19:46:43,050 INFO L125 PetriNetUnfolderBase]: For 127878/127884 co-relation queries the response was YES. [2024-06-21 19:46:43,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30210 conditions, 3790 events. 2495/3790 cut-off events. For 127878/127884 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19768 event pairs, 542 based on Foata normal form. 14/3803 useless extension candidates. Maximal degree in co-relation 30118. Up to 2402 conditions per place. [2024-06-21 19:46:43,084 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 193 selfloop transitions, 171 changer transitions 0/369 dead transitions. [2024-06-21 19:46:43,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 369 transitions, 6677 flow [2024-06-21 19:46:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:46:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:46:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 19:46:43,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-06-21 19:46:43,086 INFO L175 Difference]: Start difference. First operand has 167 places, 294 transitions, 4927 flow. Second operand 8 states and 169 transitions. [2024-06-21 19:46:43,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 369 transitions, 6677 flow [2024-06-21 19:46:43,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 369 transitions, 6263 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 19:46:43,252 INFO L231 Difference]: Finished difference. Result has 170 places, 312 transitions, 5343 flow [2024-06-21 19:46:43,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4535, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5343, PETRI_PLACES=170, PETRI_TRANSITIONS=312} [2024-06-21 19:46:43,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-21 19:46:43,252 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 312 transitions, 5343 flow [2024-06-21 19:46:43,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:43,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:43,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:43,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:46:43,253 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:43,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:43,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2133520716, now seen corresponding path program 4 times [2024-06-21 19:46:43,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:43,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30725246] [2024-06-21 19:46:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:43,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:44,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30725246] [2024-06-21 19:46:44,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30725246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:44,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:44,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052000562] [2024-06-21 19:46:44,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:44,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:44,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:44,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:44,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:44,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:44,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 312 transitions, 5343 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:44,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:44,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:44,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:46,171 INFO L124 PetriNetUnfolderBase]: 2496/3796 cut-off events. [2024-06-21 19:46:46,171 INFO L125 PetriNetUnfolderBase]: For 130143/130143 co-relation queries the response was YES. [2024-06-21 19:46:46,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30967 conditions, 3796 events. 2496/3796 cut-off events. For 130143/130143 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 19723 event pairs, 529 based on Foata normal form. 3/3798 useless extension candidates. Maximal degree in co-relation 30872. Up to 3319 conditions per place. [2024-06-21 19:46:46,207 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 270 selfloop transitions, 96 changer transitions 0/371 dead transitions. [2024-06-21 19:46:46,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 371 transitions, 6810 flow [2024-06-21 19:46:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:46:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:46:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 19:46:46,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 19:46:46,209 INFO L175 Difference]: Start difference. First operand has 170 places, 312 transitions, 5343 flow. Second operand 8 states and 160 transitions. [2024-06-21 19:46:46,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 371 transitions, 6810 flow [2024-06-21 19:46:46,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 371 transitions, 6559 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 19:46:46,406 INFO L231 Difference]: Finished difference. Result has 175 places, 320 transitions, 5471 flow [2024-06-21 19:46:46,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5471, PETRI_PLACES=175, PETRI_TRANSITIONS=320} [2024-06-21 19:46:46,406 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-21 19:46:46,406 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 320 transitions, 5471 flow [2024-06-21 19:46:46,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:46,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:46,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:46,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:46:46,407 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:46,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1567714022, now seen corresponding path program 1 times [2024-06-21 19:46:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:46,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86056190] [2024-06-21 19:46:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:46,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:49,175 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 19:46:49,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:49,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86056190] [2024-06-21 19:46:49,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86056190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:49,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:49,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:46:49,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631444294] [2024-06-21 19:46:49,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:49,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:46:49,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:49,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:46:49,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:46:49,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:49,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 320 transitions, 5471 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:49,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:49,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:49,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:50,677 INFO L124 PetriNetUnfolderBase]: 2516/3840 cut-off events. [2024-06-21 19:46:50,678 INFO L125 PetriNetUnfolderBase]: For 137533/137539 co-relation queries the response was YES. [2024-06-21 19:46:50,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31126 conditions, 3840 events. 2516/3840 cut-off events. For 137533/137539 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20062 event pairs, 561 based on Foata normal form. 8/3847 useless extension candidates. Maximal degree in co-relation 31029. Up to 3442 conditions per place. [2024-06-21 19:46:50,719 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 282 selfloop transitions, 70 changer transitions 0/357 dead transitions. [2024-06-21 19:46:50,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 357 transitions, 6347 flow [2024-06-21 19:46:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:46:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:46:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 19:46:50,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 19:46:50,721 INFO L175 Difference]: Start difference. First operand has 175 places, 320 transitions, 5471 flow. Second operand 8 states and 154 transitions. [2024-06-21 19:46:50,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 357 transitions, 6347 flow [2024-06-21 19:46:51,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 357 transitions, 6171 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 19:46:51,059 INFO L231 Difference]: Finished difference. Result has 178 places, 322 transitions, 5485 flow [2024-06-21 19:46:51,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5295, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5485, PETRI_PLACES=178, PETRI_TRANSITIONS=322} [2024-06-21 19:46:51,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-21 19:46:51,061 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 322 transitions, 5485 flow [2024-06-21 19:46:51,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:46:51,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:51,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:51,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:46:51,062 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:51,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:51,063 INFO L85 PathProgramCache]: Analyzing trace with hash 743070996, now seen corresponding path program 5 times [2024-06-21 19:46:51,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:51,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859271725] [2024-06-21 19:46:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:51,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:54,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:54,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859271725] [2024-06-21 19:46:54,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859271725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:54,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:54,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:46:54,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252288109] [2024-06-21 19:46:54,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:54,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:46:54,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:46:54,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:46:54,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:54,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 322 transitions, 5485 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:54,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:54,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:54,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:46:55,733 INFO L124 PetriNetUnfolderBase]: 2489/3782 cut-off events. [2024-06-21 19:46:55,733 INFO L125 PetriNetUnfolderBase]: For 142623/142623 co-relation queries the response was YES. [2024-06-21 19:46:55,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30720 conditions, 3782 events. 2489/3782 cut-off events. For 142623/142623 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19607 event pairs, 526 based on Foata normal form. 11/3788 useless extension candidates. Maximal degree in co-relation 30622. Up to 3404 conditions per place. [2024-06-21 19:46:55,774 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 263 selfloop transitions, 91 changer transitions 0/359 dead transitions. [2024-06-21 19:46:55,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 359 transitions, 6499 flow [2024-06-21 19:46:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:46:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:46:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:46:55,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 19:46:55,776 INFO L175 Difference]: Start difference. First operand has 178 places, 322 transitions, 5485 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:46:55,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 359 transitions, 6499 flow [2024-06-21 19:46:55,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 359 transitions, 6315 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 19:46:55,998 INFO L231 Difference]: Finished difference. Result has 182 places, 322 transitions, 5514 flow [2024-06-21 19:46:55,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5301, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5514, PETRI_PLACES=182, PETRI_TRANSITIONS=322} [2024-06-21 19:46:55,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-21 19:46:55,999 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 322 transitions, 5514 flow [2024-06-21 19:46:55,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:46:55,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:46:55,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:46:55,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:46:55,999 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:46:55,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:46:56,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1117901976, now seen corresponding path program 6 times [2024-06-21 19:46:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:46:56,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161639364] [2024-06-21 19:46:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:46:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:46:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:46:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:46:59,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:46:59,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161639364] [2024-06-21 19:46:59,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161639364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:46:59,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:46:59,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:46:59,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768579999] [2024-06-21 19:46:59,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:46:59,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:46:59,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:46:59,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:46:59,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:46:59,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:46:59,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 322 transitions, 5514 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 19:46:59,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:46:59,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:46:59,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:01,427 INFO L124 PetriNetUnfolderBase]: 2579/3923 cut-off events. [2024-06-21 19:47:01,428 INFO L125 PetriNetUnfolderBase]: For 154219/154225 co-relation queries the response was YES. [2024-06-21 19:47:01,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31995 conditions, 3923 events. 2579/3923 cut-off events. For 154219/154225 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20625 event pairs, 635 based on Foata normal form. 13/3931 useless extension candidates. Maximal degree in co-relation 31896. Up to 2491 conditions per place. [2024-06-21 19:47:01,466 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 191 selfloop transitions, 183 changer transitions 0/379 dead transitions. [2024-06-21 19:47:01,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 379 transitions, 7051 flow [2024-06-21 19:47:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 19:47:01,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:47:01,467 INFO L175 Difference]: Start difference. First operand has 182 places, 322 transitions, 5514 flow. Second operand 9 states and 172 transitions. [2024-06-21 19:47:01,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 379 transitions, 7051 flow [2024-06-21 19:47:01,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 379 transitions, 6892 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 19:47:01,680 INFO L231 Difference]: Finished difference. Result has 184 places, 332 transitions, 5907 flow [2024-06-21 19:47:01,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5907, PETRI_PLACES=184, PETRI_TRANSITIONS=332} [2024-06-21 19:47:01,681 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-21 19:47:01,681 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 332 transitions, 5907 flow [2024-06-21 19:47:01,681 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 19:47:01,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:01,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:01,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:47:01,682 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:01,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:01,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1118109366, now seen corresponding path program 7 times [2024-06-21 19:47:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:01,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971633541] [2024-06-21 19:47:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:01,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:04,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:04,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971633541] [2024-06-21 19:47:04,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971633541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:04,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:04,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:04,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753373119] [2024-06-21 19:47:04,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:04,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:04,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:04,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:04,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:04,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 332 transitions, 5907 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:47:04,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:04,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:04,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:06,165 INFO L124 PetriNetUnfolderBase]: 2775/4227 cut-off events. [2024-06-21 19:47:06,166 INFO L125 PetriNetUnfolderBase]: For 178367/178373 co-relation queries the response was YES. [2024-06-21 19:47:06,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35915 conditions, 4227 events. 2775/4227 cut-off events. For 178367/178373 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22630 event pairs, 636 based on Foata normal form. 11/4233 useless extension candidates. Maximal degree in co-relation 35815. Up to 2638 conditions per place. [2024-06-21 19:47:06,213 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 194 changer transitions 0/391 dead transitions. [2024-06-21 19:47:06,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 391 transitions, 7660 flow [2024-06-21 19:47:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:47:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:47:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-21 19:47:06,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950166112956811 [2024-06-21 19:47:06,215 INFO L175 Difference]: Start difference. First operand has 184 places, 332 transitions, 5907 flow. Second operand 7 states and 149 transitions. [2024-06-21 19:47:06,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 391 transitions, 7660 flow [2024-06-21 19:47:06,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 391 transitions, 7216 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 19:47:06,482 INFO L231 Difference]: Finished difference. Result has 186 places, 347 transitions, 6230 flow [2024-06-21 19:47:06,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5487, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6230, PETRI_PLACES=186, PETRI_TRANSITIONS=347} [2024-06-21 19:47:06,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-21 19:47:06,483 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 347 transitions, 6230 flow [2024-06-21 19:47:06,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:47:06,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:06,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:06,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:47:06,484 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:06,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:06,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1429872314, now seen corresponding path program 8 times [2024-06-21 19:47:06,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:06,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577366262] [2024-06-21 19:47:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:06,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:09,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:09,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577366262] [2024-06-21 19:47:09,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577366262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:09,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:09,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:09,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952802320] [2024-06-21 19:47:09,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:09,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:09,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:09,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:09,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:09,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 347 transitions, 6230 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:47:09,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:09,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:09,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:10,893 INFO L124 PetriNetUnfolderBase]: 2755/4190 cut-off events. [2024-06-21 19:47:10,893 INFO L125 PetriNetUnfolderBase]: For 182048/182060 co-relation queries the response was YES. [2024-06-21 19:47:10,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35863 conditions, 4190 events. 2755/4190 cut-off events. For 182048/182060 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22429 event pairs, 601 based on Foata normal form. 22/4204 useless extension candidates. Maximal degree in co-relation 35761. Up to 2629 conditions per place. [2024-06-21 19:47:10,936 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 198 changer transitions 0/390 dead transitions. [2024-06-21 19:47:10,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 390 transitions, 7642 flow [2024-06-21 19:47:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:47:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:47:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 19:47:10,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 19:47:10,938 INFO L175 Difference]: Start difference. First operand has 186 places, 347 transitions, 6230 flow. Second operand 7 states and 141 transitions. [2024-06-21 19:47:10,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 390 transitions, 7642 flow [2024-06-21 19:47:11,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 390 transitions, 7385 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 19:47:11,196 INFO L231 Difference]: Finished difference. Result has 191 places, 352 transitions, 6502 flow [2024-06-21 19:47:11,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6502, PETRI_PLACES=191, PETRI_TRANSITIONS=352} [2024-06-21 19:47:11,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-21 19:47:11,197 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 352 transitions, 6502 flow [2024-06-21 19:47:11,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 19:47:11,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:11,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:11,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:47:11,197 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:11,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:11,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1437229544, now seen corresponding path program 9 times [2024-06-21 19:47:11,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:11,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963409765] [2024-06-21 19:47:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:11,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:14,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:14,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963409765] [2024-06-21 19:47:14,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963409765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:14,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:14,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:47:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174483896] [2024-06-21 19:47:14,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:14,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:47:14,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:14,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:47:14,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:47:14,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:14,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 352 transitions, 6502 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 19:47:14,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:14,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:14,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:16,482 INFO L124 PetriNetUnfolderBase]: 2761/4206 cut-off events. [2024-06-21 19:47:16,483 INFO L125 PetriNetUnfolderBase]: For 193120/193122 co-relation queries the response was YES. [2024-06-21 19:47:16,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36204 conditions, 4206 events. 2761/4206 cut-off events. For 193120/193122 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22512 event pairs, 702 based on Foata normal form. 12/4210 useless extension candidates. Maximal degree in co-relation 36098. Up to 2647 conditions per place. [2024-06-21 19:47:16,523 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 177 selfloop transitions, 220 changer transitions 0/402 dead transitions. [2024-06-21 19:47:16,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 402 transitions, 8025 flow [2024-06-21 19:47:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 19:47:16,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 19:47:16,525 INFO L175 Difference]: Start difference. First operand has 191 places, 352 transitions, 6502 flow. Second operand 9 states and 165 transitions. [2024-06-21 19:47:16,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 402 transitions, 8025 flow [2024-06-21 19:47:16,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 402 transitions, 7708 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 19:47:16,812 INFO L231 Difference]: Finished difference. Result has 197 places, 361 transitions, 6831 flow [2024-06-21 19:47:16,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6193, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6831, PETRI_PLACES=197, PETRI_TRANSITIONS=361} [2024-06-21 19:47:16,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-21 19:47:16,813 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 361 transitions, 6831 flow [2024-06-21 19:47:16,813 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 19:47:16,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:16,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:16,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:47:16,814 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:16,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:16,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1443684064, now seen corresponding path program 2 times [2024-06-21 19:47:16,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:16,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400698048] [2024-06-21 19:47:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:16,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:19,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:19,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400698048] [2024-06-21 19:47:19,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400698048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:19,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:19,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:19,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320837264] [2024-06-21 19:47:19,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:19,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:19,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:19,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 361 transitions, 6831 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:19,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:19,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:19,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:21,456 INFO L124 PetriNetUnfolderBase]: 2795/4281 cut-off events. [2024-06-21 19:47:21,456 INFO L125 PetriNetUnfolderBase]: For 205157/205163 co-relation queries the response was YES. [2024-06-21 19:47:21,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36642 conditions, 4281 events. 2795/4281 cut-off events. For 205157/205163 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22982 event pairs, 589 based on Foata normal form. 5/4283 useless extension candidates. Maximal degree in co-relation 36535. Up to 3838 conditions per place. [2024-06-21 19:47:21,503 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 314 selfloop transitions, 71 changer transitions 0/390 dead transitions. [2024-06-21 19:47:21,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 390 transitions, 7752 flow [2024-06-21 19:47:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 19:47:21,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 19:47:21,506 INFO L175 Difference]: Start difference. First operand has 197 places, 361 transitions, 6831 flow. Second operand 8 states and 142 transitions. [2024-06-21 19:47:21,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 390 transitions, 7752 flow [2024-06-21 19:47:21,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 390 transitions, 7118 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-21 19:47:21,881 INFO L231 Difference]: Finished difference. Result has 198 places, 365 transitions, 6418 flow [2024-06-21 19:47:21,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6197, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6418, PETRI_PLACES=198, PETRI_TRANSITIONS=365} [2024-06-21 19:47:21,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-21 19:47:21,882 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 365 transitions, 6418 flow [2024-06-21 19:47:21,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:21,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:21,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:21,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:47:21,883 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:21,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:21,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1657085758, now seen corresponding path program 3 times [2024-06-21 19:47:21,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:21,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267327861] [2024-06-21 19:47:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:21,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:25,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267327861] [2024-06-21 19:47:25,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267327861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:25,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:25,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:47:25,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391399088] [2024-06-21 19:47:25,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:25,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:47:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:25,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:47:25,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:47:25,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:25,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 365 transitions, 6418 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:25,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:25,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:25,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:26,758 INFO L124 PetriNetUnfolderBase]: 2815/4315 cut-off events. [2024-06-21 19:47:26,759 INFO L125 PetriNetUnfolderBase]: For 202690/202702 co-relation queries the response was YES. [2024-06-21 19:47:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35870 conditions, 4315 events. 2815/4315 cut-off events. For 202690/202702 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23285 event pairs, 591 based on Foata normal form. 16/4327 useless extension candidates. Maximal degree in co-relation 35763. Up to 3884 conditions per place. [2024-06-21 19:47:26,800 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 318 selfloop transitions, 69 changer transitions 0/392 dead transitions. [2024-06-21 19:47:26,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 392 transitions, 7356 flow [2024-06-21 19:47:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:47:26,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-21 19:47:26,803 INFO L175 Difference]: Start difference. First operand has 198 places, 365 transitions, 6418 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:47:26,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 392 transitions, 7356 flow [2024-06-21 19:47:27,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 392 transitions, 7105 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 19:47:27,112 INFO L231 Difference]: Finished difference. Result has 198 places, 367 transitions, 6371 flow [2024-06-21 19:47:27,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6167, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6371, PETRI_PLACES=198, PETRI_TRANSITIONS=367} [2024-06-21 19:47:27,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-21 19:47:27,113 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 367 transitions, 6371 flow [2024-06-21 19:47:27,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:27,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:27,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:47:27,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:47:27,114 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:27,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:27,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1487641182, now seen corresponding path program 4 times [2024-06-21 19:47:27,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:27,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827158081] [2024-06-21 19:47:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:27,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:30,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:30,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827158081] [2024-06-21 19:47:30,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827158081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:30,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:30,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:47:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744822980] [2024-06-21 19:47:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:30,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:47:30,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:47:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:47:30,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:30,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 367 transitions, 6371 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:30,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:30,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:30,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:31,815 INFO L124 PetriNetUnfolderBase]: 2807/4311 cut-off events. [2024-06-21 19:47:31,816 INFO L125 PetriNetUnfolderBase]: For 206198/206210 co-relation queries the response was YES. [2024-06-21 19:47:31,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35806 conditions, 4311 events. 2807/4311 cut-off events. For 206198/206210 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23301 event pairs, 551 based on Foata normal form. 16/4323 useless extension candidates. Maximal degree in co-relation 35699. Up to 3760 conditions per place. [2024-06-21 19:47:31,864 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 313 selfloop transitions, 77 changer transitions 0/395 dead transitions. [2024-06-21 19:47:31,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 395 transitions, 7316 flow [2024-06-21 19:47:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:47:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:47:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:47:31,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-21 19:47:31,871 INFO L175 Difference]: Start difference. First operand has 198 places, 367 transitions, 6371 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:47:31,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 395 transitions, 7316 flow [2024-06-21 19:47:32,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 395 transitions, 7132 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 19:47:32,231 INFO L231 Difference]: Finished difference. Result has 200 places, 369 transitions, 6410 flow [2024-06-21 19:47:32,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6410, PETRI_PLACES=200, PETRI_TRANSITIONS=369} [2024-06-21 19:47:32,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-21 19:47:32,232 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 369 transitions, 6410 flow [2024-06-21 19:47:32,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:47:32,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:32,232 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 19:47:32,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:47:32,232 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:32,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1149414295, now seen corresponding path program 1 times [2024-06-21 19:47:32,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:32,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491914526] [2024-06-21 19:47:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:32,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:35,347 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 19:47:35,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:35,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491914526] [2024-06-21 19:47:35,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491914526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:35,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:35,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:47:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995446615] [2024-06-21 19:47:35,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:35,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:47:35,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:35,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:47:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:47:35,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:35,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 369 transitions, 6410 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 19:47:35,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:35,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:35,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:37,304 INFO L124 PetriNetUnfolderBase]: 3095/4777 cut-off events. [2024-06-21 19:47:37,304 INFO L125 PetriNetUnfolderBase]: For 243556/243556 co-relation queries the response was YES. [2024-06-21 19:47:37,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39924 conditions, 4777 events. 3095/4777 cut-off events. For 243556/243556 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26588 event pairs, 537 based on Foata normal form. 6/4782 useless extension candidates. Maximal degree in co-relation 39817. Up to 3864 conditions per place. [2024-06-21 19:47:37,353 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 345 selfloop transitions, 87 changer transitions 0/437 dead transitions. [2024-06-21 19:47:37,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 437 transitions, 7983 flow [2024-06-21 19:47:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:47:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:47:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 19:47:37,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 19:47:37,355 INFO L175 Difference]: Start difference. First operand has 200 places, 369 transitions, 6410 flow. Second operand 10 states and 200 transitions. [2024-06-21 19:47:37,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 437 transitions, 7983 flow [2024-06-21 19:47:37,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 437 transitions, 7780 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 19:47:37,680 INFO L231 Difference]: Finished difference. Result has 205 places, 376 transitions, 6542 flow [2024-06-21 19:47:37,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6207, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6542, PETRI_PLACES=205, PETRI_TRANSITIONS=376} [2024-06-21 19:47:37,681 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-21 19:47:37,681 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 376 transitions, 6542 flow [2024-06-21 19:47:37,681 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 19:47:37,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:37,681 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 19:47:37,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:47:37,682 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:37,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash 430418845, now seen corresponding path program 2 times [2024-06-21 19:47:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:37,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793084172] [2024-06-21 19:47:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:37,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:40,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:40,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793084172] [2024-06-21 19:47:40,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793084172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:40,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:40,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:47:40,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535258598] [2024-06-21 19:47:40,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:40,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:47:40,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:40,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:47:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:47:40,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:40,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 376 transitions, 6542 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 19:47:40,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:40,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:40,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:42,619 INFO L124 PetriNetUnfolderBase]: 3085/4768 cut-off events. [2024-06-21 19:47:42,620 INFO L125 PetriNetUnfolderBase]: For 248081/248081 co-relation queries the response was YES. [2024-06-21 19:47:42,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40148 conditions, 4768 events. 3085/4768 cut-off events. For 248081/248081 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26466 event pairs, 568 based on Foata normal form. 6/4773 useless extension candidates. Maximal degree in co-relation 40039. Up to 4283 conditions per place. [2024-06-21 19:47:42,664 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 338 selfloop transitions, 87 changer transitions 0/430 dead transitions. [2024-06-21 19:47:42,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 430 transitions, 7853 flow [2024-06-21 19:47:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:47:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:47:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 19:47:42,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 19:47:42,666 INFO L175 Difference]: Start difference. First operand has 205 places, 376 transitions, 6542 flow. Second operand 10 states and 190 transitions. [2024-06-21 19:47:42,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 430 transitions, 7853 flow [2024-06-21 19:47:43,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 430 transitions, 7688 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 19:47:43,044 INFO L231 Difference]: Finished difference. Result has 209 places, 379 transitions, 6642 flow [2024-06-21 19:47:43,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6383, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6642, PETRI_PLACES=209, PETRI_TRANSITIONS=379} [2024-06-21 19:47:43,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-21 19:47:43,047 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 379 transitions, 6642 flow [2024-06-21 19:47:43,047 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 19:47:43,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:43,047 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 19:47:43,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:47:43,048 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:43,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:43,048 INFO L85 PathProgramCache]: Analyzing trace with hash 711349149, now seen corresponding path program 3 times [2024-06-21 19:47:43,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:43,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135891502] [2024-06-21 19:47:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:43,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:46,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:46,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135891502] [2024-06-21 19:47:46,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135891502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:46,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:46,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:47:46,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241490344] [2024-06-21 19:47:46,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:46,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:47:46,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:46,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:47:46,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:47:46,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:46,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 379 transitions, 6642 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 19:47:46,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:46,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:46,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:48,017 INFO L124 PetriNetUnfolderBase]: 3116/4816 cut-off events. [2024-06-21 19:47:48,017 INFO L125 PetriNetUnfolderBase]: For 261914/261916 co-relation queries the response was YES. [2024-06-21 19:47:48,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40920 conditions, 4816 events. 3116/4816 cut-off events. For 261914/261916 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26912 event pairs, 647 based on Foata normal form. 6/4821 useless extension candidates. Maximal degree in co-relation 40809. Up to 3175 conditions per place. [2024-06-21 19:47:48,069 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 223 selfloop transitions, 213 changer transitions 0/441 dead transitions. [2024-06-21 19:47:48,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 441 transitions, 8373 flow [2024-06-21 19:47:48,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 19:47:48,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-21 19:47:48,071 INFO L175 Difference]: Start difference. First operand has 209 places, 379 transitions, 6642 flow. Second operand 9 states and 183 transitions. [2024-06-21 19:47:48,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 441 transitions, 8373 flow [2024-06-21 19:47:48,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 441 transitions, 8154 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 19:47:48,546 INFO L231 Difference]: Finished difference. Result has 210 places, 381 transitions, 6899 flow [2024-06-21 19:47:48,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6423, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6899, PETRI_PLACES=210, PETRI_TRANSITIONS=381} [2024-06-21 19:47:48,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-21 19:47:48,547 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 381 transitions, 6899 flow [2024-06-21 19:47:48,547 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 19:47:48,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:48,547 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 19:47:48,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:47:48,547 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:48,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash -417429141, now seen corresponding path program 4 times [2024-06-21 19:47:48,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:48,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705884738] [2024-06-21 19:47:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:48,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:50,569 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 19:47:50,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:50,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705884738] [2024-06-21 19:47:50,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705884738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:50,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:50,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:47:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452376933] [2024-06-21 19:47:50,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:47:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:47:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:47:50,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:50,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 381 transitions, 6899 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 19:47:50,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:50,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:50,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:52,518 INFO L124 PetriNetUnfolderBase]: 3437/5346 cut-off events. [2024-06-21 19:47:52,518 INFO L125 PetriNetUnfolderBase]: For 309032/309032 co-relation queries the response was YES. [2024-06-21 19:47:52,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46476 conditions, 5346 events. 3437/5346 cut-off events. For 309032/309032 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30846 event pairs, 691 based on Foata normal form. 4/5349 useless extension candidates. Maximal degree in co-relation 46364. Up to 4272 conditions per place. [2024-06-21 19:47:52,570 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 352 selfloop transitions, 100 changer transitions 0/457 dead transitions. [2024-06-21 19:47:52,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 457 transitions, 8895 flow [2024-06-21 19:47:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 19:47:52,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-21 19:47:52,572 INFO L175 Difference]: Start difference. First operand has 210 places, 381 transitions, 6899 flow. Second operand 9 states and 184 transitions. [2024-06-21 19:47:52,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 457 transitions, 8895 flow [2024-06-21 19:47:53,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 457 transitions, 8431 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 19:47:53,014 INFO L231 Difference]: Finished difference. Result has 213 places, 390 transitions, 6870 flow [2024-06-21 19:47:53,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6870, PETRI_PLACES=213, PETRI_TRANSITIONS=390} [2024-06-21 19:47:53,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-21 19:47:53,016 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 390 transitions, 6870 flow [2024-06-21 19:47:53,016 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 19:47:53,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:53,016 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 19:47:53,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:47:53,016 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:53,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1714629439, now seen corresponding path program 5 times [2024-06-21 19:47:53,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:53,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057009823] [2024-06-21 19:47:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:53,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:47:55,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:55,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057009823] [2024-06-21 19:47:55,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057009823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:55,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:55,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:47:55,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821366788] [2024-06-21 19:47:55,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:55,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:47:55,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:47:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:47:55,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:47:55,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 390 transitions, 6870 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 19:47:55,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:55,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:47:55,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:47:56,966 INFO L124 PetriNetUnfolderBase]: 3462/5396 cut-off events. [2024-06-21 19:47:56,966 INFO L125 PetriNetUnfolderBase]: For 317417/317417 co-relation queries the response was YES. [2024-06-21 19:47:56,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46429 conditions, 5396 events. 3462/5396 cut-off events. For 317417/317417 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31375 event pairs, 785 based on Foata normal form. 4/5399 useless extension candidates. Maximal degree in co-relation 46315. Up to 4804 conditions per place. [2024-06-21 19:47:57,026 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 344 selfloop transitions, 101 changer transitions 0/450 dead transitions. [2024-06-21 19:47:57,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 450 transitions, 8526 flow [2024-06-21 19:47:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:47:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:47:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 19:47:57,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 19:47:57,029 INFO L175 Difference]: Start difference. First operand has 213 places, 390 transitions, 6870 flow. Second operand 9 states and 175 transitions. [2024-06-21 19:47:57,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 450 transitions, 8526 flow [2024-06-21 19:47:57,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 450 transitions, 8409 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 19:47:57,527 INFO L231 Difference]: Finished difference. Result has 218 places, 394 transitions, 7057 flow [2024-06-21 19:47:57,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6757, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7057, PETRI_PLACES=218, PETRI_TRANSITIONS=394} [2024-06-21 19:47:57,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-21 19:47:57,528 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 394 transitions, 7057 flow [2024-06-21 19:47:57,528 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 19:47:57,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:47:57,528 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 19:47:57,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:47:57,528 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:47:57,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:47:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash 715990949, now seen corresponding path program 6 times [2024-06-21 19:47:57,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:47:57,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460954502] [2024-06-21 19:47:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:47:57,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:47:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:47:59,092 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 19:47:59,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:47:59,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460954502] [2024-06-21 19:47:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460954502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:47:59,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:47:59,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:47:59,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690615749] [2024-06-21 19:47:59,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:47:59,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:47:59,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:47:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:47:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:47:59,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 19:47:59,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 394 transitions, 7057 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 19:47:59,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:47:59,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 19:47:59,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:01,096 INFO L124 PetriNetUnfolderBase]: 3297/5503 cut-off events. [2024-06-21 19:48:01,096 INFO L125 PetriNetUnfolderBase]: For 370368/370546 co-relation queries the response was YES. [2024-06-21 19:48:01,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48913 conditions, 5503 events. 3297/5503 cut-off events. For 370368/370546 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35895 event pairs, 543 based on Foata normal form. 90/5528 useless extension candidates. Maximal degree in co-relation 48797. Up to 3064 conditions per place. [2024-06-21 19:48:01,155 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 259 selfloop transitions, 93 changer transitions 0/469 dead transitions. [2024-06-21 19:48:01,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 469 transitions, 8922 flow [2024-06-21 19:48:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:48:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:48:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 19:48:01,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145348837209303 [2024-06-21 19:48:01,157 INFO L175 Difference]: Start difference. First operand has 218 places, 394 transitions, 7057 flow. Second operand 8 states and 177 transitions. [2024-06-21 19:48:01,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 469 transitions, 8922 flow [2024-06-21 19:48:01,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 469 transitions, 8685 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 19:48:01,741 INFO L231 Difference]: Finished difference. Result has 222 places, 408 transitions, 7418 flow [2024-06-21 19:48:01,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7418, PETRI_PLACES=222, PETRI_TRANSITIONS=408} [2024-06-21 19:48:01,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-21 19:48:01,742 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 408 transitions, 7418 flow [2024-06-21 19:48:01,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 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 19:48:01,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:01,742 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 19:48:01,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:48:01,743 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:01,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1715989409, now seen corresponding path program 1 times [2024-06-21 19:48:01,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:01,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322737865] [2024-06-21 19:48:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:01,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:04,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:04,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322737865] [2024-06-21 19:48:04,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322737865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:04,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:04,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:48:04,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138558784] [2024-06-21 19:48:04,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:04,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:48:04,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:04,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:48:04,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:48:04,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:48:04,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 408 transitions, 7418 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:04,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:04,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:48:04,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:06,782 INFO L124 PetriNetUnfolderBase]: 3990/6254 cut-off events. [2024-06-21 19:48:06,782 INFO L125 PetriNetUnfolderBase]: For 411474/411474 co-relation queries the response was YES. [2024-06-21 19:48:06,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56310 conditions, 6254 events. 3990/6254 cut-off events. For 411474/411474 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 37905 event pairs, 994 based on Foata normal form. 4/6257 useless extension candidates. Maximal degree in co-relation 56191. Up to 5583 conditions per place. [2024-06-21 19:48:06,851 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 320 selfloop transitions, 159 changer transitions 0/484 dead transitions. [2024-06-21 19:48:06,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 484 transitions, 9457 flow [2024-06-21 19:48:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:48:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:48:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 19:48:06,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 19:48:06,853 INFO L175 Difference]: Start difference. First operand has 222 places, 408 transitions, 7418 flow. Second operand 10 states and 198 transitions. [2024-06-21 19:48:06,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 484 transitions, 9457 flow [2024-06-21 19:48:07,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 484 transitions, 9355 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:07,588 INFO L231 Difference]: Finished difference. Result has 229 places, 430 transitions, 8166 flow [2024-06-21 19:48:07,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7322, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8166, PETRI_PLACES=229, PETRI_TRANSITIONS=430} [2024-06-21 19:48:07,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-21 19:48:07,589 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 430 transitions, 8166 flow [2024-06-21 19:48:07,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:07,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:07,589 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 19:48:07,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:48:07,589 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:07,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1442447733, now seen corresponding path program 1 times [2024-06-21 19:48:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:07,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327839227] [2024-06-21 19:48:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:09,826 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 19:48:09,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:09,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327839227] [2024-06-21 19:48:09,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327839227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:09,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:09,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:48:09,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747345173] [2024-06-21 19:48:09,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:09,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:48:09,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:09,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:48:09,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:48:09,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:48:09,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 430 transitions, 8166 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:09,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:09,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:48:09,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:11,896 INFO L124 PetriNetUnfolderBase]: 3959/6189 cut-off events. [2024-06-21 19:48:11,897 INFO L125 PetriNetUnfolderBase]: For 421031/421031 co-relation queries the response was YES. [2024-06-21 19:48:11,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56527 conditions, 6189 events. 3959/6189 cut-off events. For 421031/421031 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 37128 event pairs, 1008 based on Foata normal form. 2/6190 useless extension candidates. Maximal degree in co-relation 56406. Up to 5847 conditions per place. [2024-06-21 19:48:11,969 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 400 selfloop transitions, 56 changer transitions 0/461 dead transitions. [2024-06-21 19:48:11,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 461 transitions, 9305 flow [2024-06-21 19:48:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:11,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 19:48:11,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 19:48:11,971 INFO L175 Difference]: Start difference. First operand has 229 places, 430 transitions, 8166 flow. Second operand 7 states and 136 transitions. [2024-06-21 19:48:11,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 461 transitions, 9305 flow [2024-06-21 19:48:12,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 461 transitions, 9132 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 19:48:12,695 INFO L231 Difference]: Finished difference. Result has 234 places, 431 transitions, 8177 flow [2024-06-21 19:48:12,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7997, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8177, PETRI_PLACES=234, PETRI_TRANSITIONS=431} [2024-06-21 19:48:12,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-21 19:48:12,696 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 431 transitions, 8177 flow [2024-06-21 19:48:12,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:12,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:12,696 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 19:48:12,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:48:12,697 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:12,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:12,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1427214639, now seen corresponding path program 7 times [2024-06-21 19:48:12,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:12,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255887263] [2024-06-21 19:48:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:12,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:16,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:16,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255887263] [2024-06-21 19:48:16,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255887263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:16,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:16,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:48:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726429684] [2024-06-21 19:48:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:16,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:48:16,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:48:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:48:16,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:48:16,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 431 transitions, 8177 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 19:48:16,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:16,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:48:16,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:18,784 INFO L124 PetriNetUnfolderBase]: 4515/7062 cut-off events. [2024-06-21 19:48:18,784 INFO L125 PetriNetUnfolderBase]: For 509899/509899 co-relation queries the response was YES. [2024-06-21 19:48:18,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64510 conditions, 7062 events. 4515/7062 cut-off events. For 509899/509899 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43463 event pairs, 1089 based on Foata normal form. 8/7065 useless extension candidates. Maximal degree in co-relation 64387. Up to 5496 conditions per place. [2024-06-21 19:48:18,867 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 386 selfloop transitions, 117 changer transitions 0/508 dead transitions. [2024-06-21 19:48:18,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 508 transitions, 10180 flow [2024-06-21 19:48:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:48:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:48:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 19:48:18,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 19:48:18,869 INFO L175 Difference]: Start difference. First operand has 234 places, 431 transitions, 8177 flow. Second operand 10 states and 189 transitions. [2024-06-21 19:48:18,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 508 transitions, 10180 flow [2024-06-21 19:48:19,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 508 transitions, 10091 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:19,721 INFO L231 Difference]: Finished difference. Result has 241 places, 456 transitions, 8896 flow [2024-06-21 19:48:19,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8098, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8896, PETRI_PLACES=241, PETRI_TRANSITIONS=456} [2024-06-21 19:48:19,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-21 19:48:19,722 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 456 transitions, 8896 flow [2024-06-21 19:48:19,722 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 19:48:19,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:19,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:19,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:48:19,723 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:19,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:19,723 INFO L85 PathProgramCache]: Analyzing trace with hash 81586469, now seen corresponding path program 8 times [2024-06-21 19:48:19,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:19,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989971834] [2024-06-21 19:48:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:19,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:23,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:23,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989971834] [2024-06-21 19:48:23,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989971834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:23,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:23,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:48:23,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241796530] [2024-06-21 19:48:23,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:23,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:48:23,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:23,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:48:23,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:48:23,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:48:23,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 456 transitions, 8896 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 19:48:23,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:23,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:48:23,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:26,181 INFO L124 PetriNetUnfolderBase]: 4495/7030 cut-off events. [2024-06-21 19:48:26,181 INFO L125 PetriNetUnfolderBase]: For 527873/527873 co-relation queries the response was YES. [2024-06-21 19:48:26,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65417 conditions, 7030 events. 4495/7030 cut-off events. For 527873/527873 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43279 event pairs, 1151 based on Foata normal form. 10/7035 useless extension candidates. Maximal degree in co-relation 65292. Up to 6475 conditions per place. [2024-06-21 19:48:26,255 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 392 selfloop transitions, 106 changer transitions 0/503 dead transitions. [2024-06-21 19:48:26,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 503 transitions, 10360 flow [2024-06-21 19:48:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:48:26,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:48:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 19:48:26,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-21 19:48:26,256 INFO L175 Difference]: Start difference. First operand has 241 places, 456 transitions, 8896 flow. Second operand 10 states and 179 transitions. [2024-06-21 19:48:26,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 503 transitions, 10360 flow [2024-06-21 19:48:27,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 503 transitions, 10132 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 19:48:27,281 INFO L231 Difference]: Finished difference. Result has 245 places, 463 transitions, 9107 flow [2024-06-21 19:48:27,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8674, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9107, PETRI_PLACES=245, PETRI_TRANSITIONS=463} [2024-06-21 19:48:27,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-21 19:48:27,282 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 463 transitions, 9107 flow [2024-06-21 19:48:27,283 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 19:48:27,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:27,283 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 19:48:27,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:48:27,286 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:27,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash 365313283, now seen corresponding path program 9 times [2024-06-21 19:48:27,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:27,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057485681] [2024-06-21 19:48:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057485681] [2024-06-21 19:48:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057485681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:30,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:30,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:48:30,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96599261] [2024-06-21 19:48:30,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:30,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:48:30,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:48:30,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:48:30,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:48:30,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 463 transitions, 9107 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 19:48:30,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:30,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:48:30,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:33,488 INFO L124 PetriNetUnfolderBase]: 4551/7125 cut-off events. [2024-06-21 19:48:33,489 INFO L125 PetriNetUnfolderBase]: For 546740/546746 co-relation queries the response was YES. [2024-06-21 19:48:33,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66591 conditions, 7125 events. 4551/7125 cut-off events. For 546740/546746 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44220 event pairs, 1159 based on Foata normal form. 7/7127 useless extension candidates. Maximal degree in co-relation 66464. Up to 5421 conditions per place. [2024-06-21 19:48:33,578 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 281 selfloop transitions, 224 changer transitions 0/510 dead transitions. [2024-06-21 19:48:33,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 510 transitions, 10821 flow [2024-06-21 19:48:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:48:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:48:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 19:48:33,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 19:48:33,580 INFO L175 Difference]: Start difference. First operand has 245 places, 463 transitions, 9107 flow. Second operand 9 states and 169 transitions. [2024-06-21 19:48:33,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 510 transitions, 10821 flow [2024-06-21 19:48:34,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 510 transitions, 10540 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-21 19:48:34,587 INFO L231 Difference]: Finished difference. Result has 247 places, 467 transitions, 9361 flow [2024-06-21 19:48:34,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8826, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9361, PETRI_PLACES=247, PETRI_TRANSITIONS=467} [2024-06-21 19:48:34,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-21 19:48:34,588 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 467 transitions, 9361 flow [2024-06-21 19:48:34,588 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 19:48:34,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:34,588 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 19:48:34,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:48:34,588 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:34,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1464284773, now seen corresponding path program 10 times [2024-06-21 19:48:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663894391] [2024-06-21 19:48:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:37,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663894391] [2024-06-21 19:48:37,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663894391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:37,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:37,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:48:37,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840506809] [2024-06-21 19:48:37,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:37,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:48:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:48:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:48:37,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:48:37,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 467 transitions, 9361 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 19:48:37,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:37,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:48:37,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:40,359 INFO L124 PetriNetUnfolderBase]: 4554/7122 cut-off events. [2024-06-21 19:48:40,359 INFO L125 PetriNetUnfolderBase]: For 561167/561169 co-relation queries the response was YES. [2024-06-21 19:48:40,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67199 conditions, 7122 events. 4554/7122 cut-off events. For 561167/561169 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 44265 event pairs, 1205 based on Foata normal form. 6/7120 useless extension candidates. Maximal degree in co-relation 67071. Up to 5452 conditions per place. [2024-06-21 19:48:40,454 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 266 selfloop transitions, 239 changer transitions 0/510 dead transitions. [2024-06-21 19:48:40,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 510 transitions, 11066 flow [2024-06-21 19:48:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:48:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:48:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:48:40,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 19:48:40,476 INFO L175 Difference]: Start difference. First operand has 247 places, 467 transitions, 9361 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:48:40,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 510 transitions, 11066 flow [2024-06-21 19:48:41,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 510 transitions, 10583 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 19:48:41,696 INFO L231 Difference]: Finished difference. Result has 249 places, 469 transitions, 9428 flow [2024-06-21 19:48:41,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8878, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9428, PETRI_PLACES=249, PETRI_TRANSITIONS=469} [2024-06-21 19:48:41,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-21 19:48:41,697 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 469 transitions, 9428 flow [2024-06-21 19:48:41,697 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 19:48:41,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:41,698 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 19:48:41,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:48:41,698 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:41,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -237191185, now seen corresponding path program 2 times [2024-06-21 19:48:41,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:41,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040803435] [2024-06-21 19:48:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:41,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:44,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:44,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040803435] [2024-06-21 19:48:44,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040803435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:44,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:44,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:48:44,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707203358] [2024-06-21 19:48:44,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:44,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:48:44,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:44,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:48:44,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:48:44,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:48:44,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 469 transitions, 9428 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:44,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:44,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:48:44,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:46,732 INFO L124 PetriNetUnfolderBase]: 4551/7129 cut-off events. [2024-06-21 19:48:46,733 INFO L125 PetriNetUnfolderBase]: For 567940/567940 co-relation queries the response was YES. [2024-06-21 19:48:46,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67368 conditions, 7129 events. 4551/7129 cut-off events. For 567940/567940 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 44129 event pairs, 1198 based on Foata normal form. 1/7125 useless extension candidates. Maximal degree in co-relation 67239. Up to 6778 conditions per place. [2024-06-21 19:48:46,812 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 433 selfloop transitions, 54 changer transitions 0/492 dead transitions. [2024-06-21 19:48:46,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 492 transitions, 10601 flow [2024-06-21 19:48:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 19:48:46,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 19:48:46,814 INFO L175 Difference]: Start difference. First operand has 249 places, 469 transitions, 9428 flow. Second operand 6 states and 119 transitions. [2024-06-21 19:48:46,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 492 transitions, 10601 flow [2024-06-21 19:48:47,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 492 transitions, 10151 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 19:48:47,850 INFO L231 Difference]: Finished difference. Result has 248 places, 469 transitions, 9112 flow [2024-06-21 19:48:47,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8978, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9112, PETRI_PLACES=248, PETRI_TRANSITIONS=469} [2024-06-21 19:48:47,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-21 19:48:47,851 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 469 transitions, 9112 flow [2024-06-21 19:48:47,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:47,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:47,851 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 19:48:47,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:48:47,851 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:47,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:47,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2130632723, now seen corresponding path program 3 times [2024-06-21 19:48:47,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:47,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148656747] [2024-06-21 19:48:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:47,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148656747] [2024-06-21 19:48:50,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148656747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:50,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:50,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:48:50,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812945753] [2024-06-21 19:48:50,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:50,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:48:50,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:50,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:48:50,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:48:50,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:48:50,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 469 transitions, 9112 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:50,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:50,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:48:50,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:53,065 INFO L124 PetriNetUnfolderBase]: 4536/7108 cut-off events. [2024-06-21 19:48:53,066 INFO L125 PetriNetUnfolderBase]: For 573347/573347 co-relation queries the response was YES. [2024-06-21 19:48:53,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66069 conditions, 7108 events. 4536/7108 cut-off events. For 573347/573347 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 44036 event pairs, 1230 based on Foata normal form. 1/7103 useless extension candidates. Maximal degree in co-relation 65938. Up to 6755 conditions per place. [2024-06-21 19:48:53,146 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 424 selfloop transitions, 59 changer transitions 0/488 dead transitions. [2024-06-21 19:48:53,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 488 transitions, 10222 flow [2024-06-21 19:48:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 19:48:53,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 19:48:53,148 INFO L175 Difference]: Start difference. First operand has 248 places, 469 transitions, 9112 flow. Second operand 6 states and 112 transitions. [2024-06-21 19:48:53,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 488 transitions, 10222 flow [2024-06-21 19:48:54,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 488 transitions, 10122 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:54,175 INFO L231 Difference]: Finished difference. Result has 251 places, 473 transitions, 9257 flow [2024-06-21 19:48:54,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9015, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9257, PETRI_PLACES=251, PETRI_TRANSITIONS=473} [2024-06-21 19:48:54,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-21 19:48:54,176 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 473 transitions, 9257 flow [2024-06-21 19:48:54,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:54,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:54,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:54,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:48:54,176 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:54,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:54,177 INFO L85 PathProgramCache]: Analyzing trace with hash 316200325, now seen corresponding path program 1 times [2024-06-21 19:48:54,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:54,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159118109] [2024-06-21 19:48:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:54,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:56,877 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 19:48:56,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:56,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159118109] [2024-06-21 19:48:56,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159118109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:56,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:56,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:48:56,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360358245] [2024-06-21 19:48:56,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:56,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:48:56,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:56,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:48:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:48:56,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 19:48:56,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 473 transitions, 9257 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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 19:48:56,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:56,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 19:48:56,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:59,161 INFO L124 PetriNetUnfolderBase]: 4390/6975 cut-off events. [2024-06-21 19:48:59,161 INFO L125 PetriNetUnfolderBase]: For 606327/606358 co-relation queries the response was YES. [2024-06-21 19:48:59,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65695 conditions, 6975 events. 4390/6975 cut-off events. For 606327/606358 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44209 event pairs, 1757 based on Foata normal form. 5/6948 useless extension candidates. Maximal degree in co-relation 65560. Up to 6271 conditions per place. [2024-06-21 19:48:59,246 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 386 selfloop transitions, 32 changer transitions 0/504 dead transitions. [2024-06-21 19:48:59,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 504 transitions, 10564 flow [2024-06-21 19:48:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 19:48:59,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 19:48:59,248 INFO L175 Difference]: Start difference. First operand has 251 places, 473 transitions, 9257 flow. Second operand 6 states and 116 transitions. [2024-06-21 19:48:59,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 504 transitions, 10564 flow [2024-06-21 19:49:00,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 504 transitions, 10511 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:49:00,573 INFO L231 Difference]: Finished difference. Result has 256 places, 484 transitions, 9502 flow [2024-06-21 19:49:00,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9204, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9502, PETRI_PLACES=256, PETRI_TRANSITIONS=484} [2024-06-21 19:49:00,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-21 19:49:00,574 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 484 transitions, 9502 flow [2024-06-21 19:49:00,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 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 19:49:00,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:00,574 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 19:49:00,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:49:00,574 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:00,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash -586238115, now seen corresponding path program 1 times [2024-06-21 19:49:00,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:00,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923048673] [2024-06-21 19:49:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:00,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:04,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:04,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923048673] [2024-06-21 19:49:04,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923048673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:04,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:04,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:04,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712520323] [2024-06-21 19:49:04,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:04,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:04,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:49:04,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 484 transitions, 9502 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:04,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:04,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:49:04,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:06,852 INFO L124 PetriNetUnfolderBase]: 4571/7176 cut-off events. [2024-06-21 19:49:06,852 INFO L125 PetriNetUnfolderBase]: For 609977/609977 co-relation queries the response was YES. [2024-06-21 19:49:06,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67644 conditions, 7176 events. 4571/7176 cut-off events. For 609977/609977 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 44621 event pairs, 1320 based on Foata normal form. 4/7179 useless extension candidates. Maximal degree in co-relation 67505. Up to 6740 conditions per place. [2024-06-21 19:49:06,935 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 454 selfloop transitions, 69 changer transitions 0/528 dead transitions. [2024-06-21 19:49:06,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 528 transitions, 10990 flow [2024-06-21 19:49:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:49:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:49:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:49:06,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-21 19:49:06,938 INFO L175 Difference]: Start difference. First operand has 256 places, 484 transitions, 9502 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:49:06,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 528 transitions, 10990 flow [2024-06-21 19:49:08,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 528 transitions, 10906 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-21 19:49:08,244 INFO L231 Difference]: Finished difference. Result has 264 places, 493 transitions, 9682 flow [2024-06-21 19:49:08,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9418, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9682, PETRI_PLACES=264, PETRI_TRANSITIONS=493} [2024-06-21 19:49:08,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-21 19:49:08,245 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 493 transitions, 9682 flow [2024-06-21 19:49:08,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:08,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:08,245 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 19:49:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:49:08,246 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:08,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1521122483, now seen corresponding path program 2 times [2024-06-21 19:49:08,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:08,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871748242] [2024-06-21 19:49:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:11,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:11,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871748242] [2024-06-21 19:49:11,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871748242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:11,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:11,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:49:11,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615030029] [2024-06-21 19:49:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:11,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:49:11,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:11,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:49:11,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:49:11,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:49:11,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 493 transitions, 9682 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:11,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:11,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:49:11,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:13,567 INFO L124 PetriNetUnfolderBase]: 4626/7243 cut-off events. [2024-06-21 19:49:13,567 INFO L125 PetriNetUnfolderBase]: For 628827/628827 co-relation queries the response was YES. [2024-06-21 19:49:13,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69175 conditions, 7243 events. 4626/7243 cut-off events. For 628827/628827 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 44991 event pairs, 1813 based on Foata normal form. 3/7244 useless extension candidates. Maximal degree in co-relation 69033. Up to 6952 conditions per place. [2024-06-21 19:49:13,650 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 490 selfloop transitions, 24 changer transitions 0/519 dead transitions. [2024-06-21 19:49:13,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 519 transitions, 11027 flow [2024-06-21 19:49:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 19:49:13,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-21 19:49:13,652 INFO L175 Difference]: Start difference. First operand has 264 places, 493 transitions, 9682 flow. Second operand 8 states and 126 transitions. [2024-06-21 19:49:13,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 519 transitions, 11027 flow [2024-06-21 19:49:15,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 519 transitions, 10901 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 19:49:15,024 INFO L231 Difference]: Finished difference. Result has 270 places, 503 transitions, 9799 flow [2024-06-21 19:49:15,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9556, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9799, PETRI_PLACES=270, PETRI_TRANSITIONS=503} [2024-06-21 19:49:15,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-21 19:49:15,025 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 503 transitions, 9799 flow [2024-06-21 19:49:15,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:15,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:15,025 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 19:49:15,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:49:15,025 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:15,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash -428508285, now seen corresponding path program 1 times [2024-06-21 19:49:15,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:15,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128580186] [2024-06-21 19:49:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:18,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:18,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128580186] [2024-06-21 19:49:18,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128580186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:18,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:18,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:18,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637230076] [2024-06-21 19:49:18,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:18,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:18,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:18,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:18,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:49:18,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 503 transitions, 9799 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:18,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:18,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:49:18,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:21,368 INFO L124 PetriNetUnfolderBase]: 4894/7699 cut-off events. [2024-06-21 19:49:21,368 INFO L125 PetriNetUnfolderBase]: For 725803/725803 co-relation queries the response was YES. [2024-06-21 19:49:21,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72380 conditions, 7699 events. 4894/7699 cut-off events. For 725803/725803 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48462 event pairs, 1056 based on Foata normal form. 56/7754 useless extension candidates. Maximal degree in co-relation 72234. Up to 5796 conditions per place. [2024-06-21 19:49:21,469 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 432 selfloop transitions, 130 changer transitions 0/567 dead transitions. [2024-06-21 19:49:21,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 567 transitions, 11564 flow [2024-06-21 19:49:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:49:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:49:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 19:49:21,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 19:49:21,471 INFO L175 Difference]: Start difference. First operand has 270 places, 503 transitions, 9799 flow. Second operand 10 states and 200 transitions. [2024-06-21 19:49:21,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 567 transitions, 11564 flow [2024-06-21 19:49:23,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 567 transitions, 11442 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 19:49:23,190 INFO L231 Difference]: Finished difference. Result has 275 places, 509 transitions, 10139 flow [2024-06-21 19:49:23,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9677, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10139, PETRI_PLACES=275, PETRI_TRANSITIONS=509} [2024-06-21 19:49:23,191 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-21 19:49:23,191 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 509 transitions, 10139 flow [2024-06-21 19:49:23,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:23,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:23,191 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 19:49:23,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:49:23,192 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:23,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash 458231789, now seen corresponding path program 2 times [2024-06-21 19:49:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:23,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948418550] [2024-06-21 19:49:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:23,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:26,531 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 19:49:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948418550] [2024-06-21 19:49:26,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948418550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:26,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:26,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:26,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813648657] [2024-06-21 19:49:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:26,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:26,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:26,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:49:26,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 509 transitions, 10139 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:26,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:26,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:49:26,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:29,393 INFO L124 PetriNetUnfolderBase]: 4743/7475 cut-off events. [2024-06-21 19:49:29,393 INFO L125 PetriNetUnfolderBase]: For 671388/671388 co-relation queries the response was YES. [2024-06-21 19:49:29,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67994 conditions, 7475 events. 4743/7475 cut-off events. For 671388/671388 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 46938 event pairs, 1141 based on Foata normal form. 70/7544 useless extension candidates. Maximal degree in co-relation 67848. Up to 6466 conditions per place. [2024-06-21 19:49:29,495 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 452 selfloop transitions, 106 changer transitions 0/563 dead transitions. [2024-06-21 19:49:29,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 563 transitions, 11645 flow [2024-06-21 19:49:29,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:49:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:49:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 19:49:29,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-21 19:49:29,501 INFO L175 Difference]: Start difference. First operand has 275 places, 509 transitions, 10139 flow. Second operand 10 states and 191 transitions. [2024-06-21 19:49:29,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 563 transitions, 11645 flow [2024-06-21 19:49:31,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 563 transitions, 11066 flow, removed 148 selfloop flow, removed 8 redundant places. [2024-06-21 19:49:31,462 INFO L231 Difference]: Finished difference. Result has 277 places, 513 transitions, 9971 flow [2024-06-21 19:49:31,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9652, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9971, PETRI_PLACES=277, PETRI_TRANSITIONS=513} [2024-06-21 19:49:31,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-21 19:49:31,463 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 513 transitions, 9971 flow [2024-06-21 19:49:31,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:31,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:31,464 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 19:49:31,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:49:31,464 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:31,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:31,464 INFO L85 PathProgramCache]: Analyzing trace with hash 776438411, now seen corresponding path program 3 times [2024-06-21 19:49:31,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:31,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701414239] [2024-06-21 19:49:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:31,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:34,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:34,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701414239] [2024-06-21 19:49:34,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701414239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:34,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:34,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:34,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898523959] [2024-06-21 19:49:34,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:34,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:34,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:34,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:34,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:49:34,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 513 transitions, 9971 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:34,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:34,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:49:34,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:37,295 INFO L124 PetriNetUnfolderBase]: 4880/7703 cut-off events. [2024-06-21 19:49:37,295 INFO L125 PetriNetUnfolderBase]: For 621329/621335 co-relation queries the response was YES. [2024-06-21 19:49:37,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67676 conditions, 7703 events. 4880/7703 cut-off events. For 621329/621335 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 49117 event pairs, 1092 based on Foata normal form. 34/7735 useless extension candidates. Maximal degree in co-relation 67529. Up to 5786 conditions per place. [2024-06-21 19:49:37,425 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 343 selfloop transitions, 233 changer transitions 0/581 dead transitions. [2024-06-21 19:49:37,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 581 transitions, 12108 flow [2024-06-21 19:49:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:49:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:49:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 19:49:37,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-21 19:49:37,427 INFO L175 Difference]: Start difference. First operand has 277 places, 513 transitions, 9971 flow. Second operand 9 states and 187 transitions. [2024-06-21 19:49:37,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 581 transitions, 12108 flow [2024-06-21 19:49:39,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 581 transitions, 11901 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 19:49:39,140 INFO L231 Difference]: Finished difference. Result has 278 places, 514 transitions, 10261 flow [2024-06-21 19:49:39,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9764, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10261, PETRI_PLACES=278, PETRI_TRANSITIONS=514} [2024-06-21 19:49:39,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-21 19:49:39,141 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 514 transitions, 10261 flow [2024-06-21 19:49:39,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:39,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:39,142 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 19:49:39,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:49:39,142 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:39,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash 418411083, now seen corresponding path program 4 times [2024-06-21 19:49:39,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:39,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487268965] [2024-06-21 19:49:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:39,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:42,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:42,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487268965] [2024-06-21 19:49:42,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487268965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:42,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:42,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:49:42,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478212131] [2024-06-21 19:49:42,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:42,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:49:42,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:49:42,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:49:42,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:49:42,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 514 transitions, 10261 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:42,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:42,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:49:42,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:46,280 INFO L124 PetriNetUnfolderBase]: 5017/7921 cut-off events. [2024-06-21 19:49:46,280 INFO L125 PetriNetUnfolderBase]: For 647082/647084 co-relation queries the response was YES. [2024-06-21 19:49:46,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70132 conditions, 7921 events. 5017/7921 cut-off events. For 647082/647084 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 50751 event pairs, 1204 based on Foata normal form. 30/7949 useless extension candidates. Maximal degree in co-relation 69984. Up to 6033 conditions per place. [2024-06-21 19:49:46,399 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 340 selfloop transitions, 239 changer transitions 0/584 dead transitions. [2024-06-21 19:49:46,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 584 transitions, 12410 flow [2024-06-21 19:49:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:49:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:49:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 19:49:46,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-21 19:49:46,401 INFO L175 Difference]: Start difference. First operand has 278 places, 514 transitions, 10261 flow. Second operand 10 states and 203 transitions. [2024-06-21 19:49:46,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 584 transitions, 12410 flow [2024-06-21 19:49:48,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 584 transitions, 12021 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 19:49:48,984 INFO L231 Difference]: Finished difference. Result has 282 places, 516 transitions, 10422 flow [2024-06-21 19:49:48,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9872, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10422, PETRI_PLACES=282, PETRI_TRANSITIONS=516} [2024-06-21 19:49:48,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-21 19:49:48,985 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 516 transitions, 10422 flow [2024-06-21 19:49:48,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:48,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:48,985 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 19:49:48,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:49:48,986 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:48,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash 576988751, now seen corresponding path program 5 times [2024-06-21 19:49:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:48,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520767541] [2024-06-21 19:49:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:52,817 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 19:49:52,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:52,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520767541] [2024-06-21 19:49:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520767541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:52,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:52,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:49:52,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101496654] [2024-06-21 19:49:52,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:52,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:49:52,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:52,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:49:52,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:49:52,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:49:52,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 516 transitions, 10422 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:52,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:52,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:49:52,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:56,043 INFO L124 PetriNetUnfolderBase]: 5139/8127 cut-off events. [2024-06-21 19:49:56,044 INFO L125 PetriNetUnfolderBase]: For 662032/662034 co-relation queries the response was YES. [2024-06-21 19:49:56,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71846 conditions, 8127 events. 5139/8127 cut-off events. For 662032/662034 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 52363 event pairs, 1190 based on Foata normal form. 24/8149 useless extension candidates. Maximal degree in co-relation 71697. Up to 6013 conditions per place. [2024-06-21 19:49:56,147 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 349 selfloop transitions, 246 changer transitions 0/600 dead transitions. [2024-06-21 19:49:56,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 600 transitions, 12737 flow [2024-06-21 19:49:56,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:49:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:49:56,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-21 19:49:56,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-21 19:49:56,149 INFO L175 Difference]: Start difference. First operand has 282 places, 516 transitions, 10422 flow. Second operand 11 states and 223 transitions. [2024-06-21 19:49:56,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 600 transitions, 12737 flow [2024-06-21 19:49:58,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 600 transitions, 12272 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 19:49:58,107 INFO L231 Difference]: Finished difference. Result has 287 places, 523 transitions, 10616 flow [2024-06-21 19:49:58,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9957, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10616, PETRI_PLACES=287, PETRI_TRANSITIONS=523} [2024-06-21 19:49:58,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-21 19:49:58,107 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 523 transitions, 10616 flow [2024-06-21 19:49:58,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:58,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:58,108 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 19:49:58,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:49:58,108 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:58,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:58,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1957232665, now seen corresponding path program 1 times [2024-06-21 19:49:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:58,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455719793] [2024-06-21 19:49:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:01,259 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 19:50:01,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:01,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455719793] [2024-06-21 19:50:01,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455719793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:01,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:01,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412377641] [2024-06-21 19:50:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:01,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:01,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:50:01,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 523 transitions, 10616 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:01,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:01,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:50:01,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:04,090 INFO L124 PetriNetUnfolderBase]: 5624/8917 cut-off events. [2024-06-21 19:50:04,090 INFO L125 PetriNetUnfolderBase]: For 787861/787867 co-relation queries the response was YES. [2024-06-21 19:50:04,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81025 conditions, 8917 events. 5624/8917 cut-off events. For 787861/787867 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 58402 event pairs, 1262 based on Foata normal form. 22/8937 useless extension candidates. Maximal degree in co-relation 80874. Up to 5237 conditions per place. [2024-06-21 19:50:04,204 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 363 selfloop transitions, 236 changer transitions 0/604 dead transitions. [2024-06-21 19:50:04,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 604 transitions, 13337 flow [2024-06-21 19:50:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 19:50:04,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2024-06-21 19:50:04,206 INFO L175 Difference]: Start difference. First operand has 287 places, 523 transitions, 10616 flow. Second operand 9 states and 190 transitions. [2024-06-21 19:50:04,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 604 transitions, 13337 flow [2024-06-21 19:50:06,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 604 transitions, 12721 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-21 19:50:06,502 INFO L231 Difference]: Finished difference. Result has 288 places, 529 transitions, 10694 flow [2024-06-21 19:50:06,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10000, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10694, PETRI_PLACES=288, PETRI_TRANSITIONS=529} [2024-06-21 19:50:06,503 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 19:50:06,503 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 529 transitions, 10694 flow [2024-06-21 19:50:06,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:06,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:06,504 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 19:50:06,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:50:06,504 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:06,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash 256233743, now seen corresponding path program 6 times [2024-06-21 19:50:06,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:06,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353153547] [2024-06-21 19:50:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:06,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353153547] [2024-06-21 19:50:08,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353153547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:08,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:08,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800387381] [2024-06-21 19:50:08,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:08,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:08,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:08,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:08,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:08,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:50:08,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 529 transitions, 10694 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:08,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:08,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:50:08,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:11,788 INFO L124 PetriNetUnfolderBase]: 5630/8918 cut-off events. [2024-06-21 19:50:11,789 INFO L125 PetriNetUnfolderBase]: For 781747/781747 co-relation queries the response was YES. [2024-06-21 19:50:11,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81071 conditions, 8918 events. 5630/8918 cut-off events. For 781747/781747 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 58282 event pairs, 1425 based on Foata normal form. 6/8923 useless extension candidates. Maximal degree in co-relation 80918. Up to 7327 conditions per place. [2024-06-21 19:50:11,894 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 468 selfloop transitions, 124 changer transitions 0/597 dead transitions. [2024-06-21 19:50:11,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 597 transitions, 12846 flow [2024-06-21 19:50:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:11,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 19:50:11,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 19:50:11,896 INFO L175 Difference]: Start difference. First operand has 288 places, 529 transitions, 10694 flow. Second operand 9 states and 182 transitions. [2024-06-21 19:50:11,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 597 transitions, 12846 flow [2024-06-21 19:50:14,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 597 transitions, 12625 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:14,230 INFO L231 Difference]: Finished difference. Result has 294 places, 535 transitions, 10923 flow [2024-06-21 19:50:14,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10477, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10923, PETRI_PLACES=294, PETRI_TRANSITIONS=535} [2024-06-21 19:50:14,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-21 19:50:14,231 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 535 transitions, 10923 flow [2024-06-21 19:50:14,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:14,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:14,231 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 19:50:14,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:50:14,232 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:14,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1614054539, now seen corresponding path program 7 times [2024-06-21 19:50:14,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:14,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644748241] [2024-06-21 19:50:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:14,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:16,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:16,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644748241] [2024-06-21 19:50:16,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644748241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:16,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:16,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:16,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690585390] [2024-06-21 19:50:16,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:16,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:16,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:16,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:16,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:16,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:50:16,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 535 transitions, 10923 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:16,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:16,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:50:16,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:19,317 INFO L124 PetriNetUnfolderBase]: 5631/8953 cut-off events. [2024-06-21 19:50:19,317 INFO L125 PetriNetUnfolderBase]: For 795520/795520 co-relation queries the response was YES. [2024-06-21 19:50:19,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82198 conditions, 8953 events. 5631/8953 cut-off events. For 795520/795520 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 58982 event pairs, 1635 based on Foata normal form. 6/8958 useless extension candidates. Maximal degree in co-relation 82042. Up to 8292 conditions per place. [2024-06-21 19:50:19,445 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 478 selfloop transitions, 109 changer transitions 0/592 dead transitions. [2024-06-21 19:50:19,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 592 transitions, 12788 flow [2024-06-21 19:50:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 19:50:19,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 19:50:19,447 INFO L175 Difference]: Start difference. First operand has 294 places, 535 transitions, 10923 flow. Second operand 9 states and 173 transitions. [2024-06-21 19:50:19,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 592 transitions, 12788 flow [2024-06-21 19:50:21,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 592 transitions, 12520 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:21,995 INFO L231 Difference]: Finished difference. Result has 297 places, 539 transitions, 11016 flow [2024-06-21 19:50:21,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10658, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11016, PETRI_PLACES=297, PETRI_TRANSITIONS=539} [2024-06-21 19:50:21,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-21 19:50:21,995 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 539 transitions, 11016 flow [2024-06-21 19:50:21,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:21,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:21,996 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 19:50:21,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:50:21,996 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:21,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:21,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1829718739, now seen corresponding path program 8 times [2024-06-21 19:50:21,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:21,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309613526] [2024-06-21 19:50:21,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:21,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:23,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309613526] [2024-06-21 19:50:23,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309613526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:23,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:23,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:23,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228653130] [2024-06-21 19:50:23,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:23,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:23,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 19:50:23,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 539 transitions, 11016 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:23,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:23,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 19:50:23,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:26,427 INFO L124 PetriNetUnfolderBase]: 4612/7811 cut-off events. [2024-06-21 19:50:26,427 INFO L125 PetriNetUnfolderBase]: For 754134/754542 co-relation queries the response was YES. [2024-06-21 19:50:26,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73542 conditions, 7811 events. 4612/7811 cut-off events. For 754134/754542 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 55755 event pairs, 934 based on Foata normal form. 171/7817 useless extension candidates. Maximal degree in co-relation 73385. Up to 4466 conditions per place. [2024-06-21 19:50:26,552 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 329 selfloop transitions, 139 changer transitions 0/608 dead transitions. [2024-06-21 19:50:26,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 608 transitions, 13146 flow [2024-06-21 19:50:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 19:50:26,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145348837209303 [2024-06-21 19:50:26,554 INFO L175 Difference]: Start difference. First operand has 297 places, 539 transitions, 11016 flow. Second operand 8 states and 177 transitions. [2024-06-21 19:50:26,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 608 transitions, 13146 flow [2024-06-21 19:50:28,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 608 transitions, 12861 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:28,892 INFO L231 Difference]: Finished difference. Result has 299 places, 547 transitions, 11291 flow [2024-06-21 19:50:28,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10731, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11291, PETRI_PLACES=299, PETRI_TRANSITIONS=547} [2024-06-21 19:50:28,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-21 19:50:28,893 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 547 transitions, 11291 flow [2024-06-21 19:50:28,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:28,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:28,894 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 19:50:28,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:50:28,894 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:28,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:28,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1614060491, now seen corresponding path program 2 times [2024-06-21 19:50:28,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:28,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364212925] [2024-06-21 19:50:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:28,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:31,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:31,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364212925] [2024-06-21 19:50:31,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364212925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:31,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:31,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:50:31,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248700634] [2024-06-21 19:50:31,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:31,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:50:31,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:31,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:50:31,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:50:31,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:50:31,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 547 transitions, 11291 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 19:50:31,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:31,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:50:31,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:35,421 INFO L124 PetriNetUnfolderBase]: 5715/9091 cut-off events. [2024-06-21 19:50:35,422 INFO L125 PetriNetUnfolderBase]: For 851977/851977 co-relation queries the response was YES. [2024-06-21 19:50:35,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83156 conditions, 9091 events. 5715/9091 cut-off events. For 851977/851977 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 60093 event pairs, 1516 based on Foata normal form. 44/9134 useless extension candidates. Maximal degree in co-relation 82997. Up to 7918 conditions per place. [2024-06-21 19:50:35,561 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 438 selfloop transitions, 171 changer transitions 0/614 dead transitions. [2024-06-21 19:50:35,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 614 transitions, 13290 flow [2024-06-21 19:50:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:50:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:50:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-21 19:50:35,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-21 19:50:35,562 INFO L175 Difference]: Start difference. First operand has 299 places, 547 transitions, 11291 flow. Second operand 11 states and 216 transitions. [2024-06-21 19:50:35,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 614 transitions, 13290 flow [2024-06-21 19:50:38,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 614 transitions, 13018 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:38,198 INFO L231 Difference]: Finished difference. Result has 305 places, 552 transitions, 11587 flow [2024-06-21 19:50:38,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11046, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11587, PETRI_PLACES=305, PETRI_TRANSITIONS=552} [2024-06-21 19:50:38,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-21 19:50:38,199 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 552 transitions, 11587 flow [2024-06-21 19:50:38,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 19:50:38,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:38,200 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 19:50:38,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:50:38,200 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:38,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1767659095, now seen corresponding path program 9 times [2024-06-21 19:50:38,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:38,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917639117] [2024-06-21 19:50:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:38,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:42,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:42,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917639117] [2024-06-21 19:50:42,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917639117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:42,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:42,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835132991] [2024-06-21 19:50:42,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:42,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:42,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:42,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:50:42,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 552 transitions, 11587 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:42,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:42,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:50:42,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:45,677 INFO L124 PetriNetUnfolderBase]: 5893/9377 cut-off events. [2024-06-21 19:50:45,678 INFO L125 PetriNetUnfolderBase]: For 831144/831144 co-relation queries the response was YES. [2024-06-21 19:50:45,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84035 conditions, 9377 events. 5893/9377 cut-off events. For 831144/831144 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 62106 event pairs, 1470 based on Foata normal form. 38/9410 useless extension candidates. Maximal degree in co-relation 83875. Up to 7367 conditions per place. [2024-06-21 19:50:45,822 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 466 selfloop transitions, 138 changer transitions 0/609 dead transitions. [2024-06-21 19:50:45,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 609 transitions, 13451 flow [2024-06-21 19:50:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:50:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:50:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 19:50:45,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 19:50:45,823 INFO L175 Difference]: Start difference. First operand has 305 places, 552 transitions, 11587 flow. Second operand 10 states and 190 transitions. [2024-06-21 19:50:45,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 609 transitions, 13451 flow [2024-06-21 19:50:48,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 609 transitions, 13117 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 19:50:48,573 INFO L231 Difference]: Finished difference. Result has 307 places, 556 transitions, 11703 flow [2024-06-21 19:50:48,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11253, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11703, PETRI_PLACES=307, PETRI_TRANSITIONS=556} [2024-06-21 19:50:48,573 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-21 19:50:48,573 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 556 transitions, 11703 flow [2024-06-21 19:50:48,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:48,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:48,574 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 19:50:48,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:50:48,574 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:48,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:48,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1126702675, now seen corresponding path program 10 times [2024-06-21 19:50:48,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:48,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487312466] [2024-06-21 19:50:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:48,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:52,193 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 19:50:52,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:52,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487312466] [2024-06-21 19:50:52,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487312466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:52,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:52,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:52,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601226087] [2024-06-21 19:50:52,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:52,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:52,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:52,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:52,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:52,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:50:52,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 556 transitions, 11703 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:52,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:52,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:50:52,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:55,872 INFO L124 PetriNetUnfolderBase]: 5788/9216 cut-off events. [2024-06-21 19:50:55,872 INFO L125 PetriNetUnfolderBase]: For 776393/776393 co-relation queries the response was YES. [2024-06-21 19:50:55,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79624 conditions, 9216 events. 5788/9216 cut-off events. For 776393/776393 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 61016 event pairs, 1524 based on Foata normal form. 50/9261 useless extension candidates. Maximal degree in co-relation 79463. Up to 8077 conditions per place. [2024-06-21 19:50:56,011 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 489 selfloop transitions, 108 changer transitions 0/602 dead transitions. [2024-06-21 19:50:56,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 602 transitions, 13257 flow [2024-06-21 19:50:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:50:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:50:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 19:50:56,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-21 19:50:56,013 INFO L175 Difference]: Start difference. First operand has 307 places, 556 transitions, 11703 flow. Second operand 10 states and 181 transitions. [2024-06-21 19:50:56,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 602 transitions, 13257 flow [2024-06-21 19:50:58,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 602 transitions, 12831 flow, removed 115 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:58,369 INFO L231 Difference]: Finished difference. Result has 310 places, 559 transitions, 11666 flow [2024-06-21 19:50:58,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11346, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11666, PETRI_PLACES=310, PETRI_TRANSITIONS=559} [2024-06-21 19:50:58,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-21 19:50:58,370 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 559 transitions, 11666 flow [2024-06-21 19:50:58,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:58,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:58,370 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 19:50:58,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:50:58,370 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:58,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash 761323381, now seen corresponding path program 11 times [2024-06-21 19:50:58,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:58,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255028372] [2024-06-21 19:50:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:58,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:02,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:02,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255028372] [2024-06-21 19:51:02,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255028372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:02,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:02,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:02,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976754563] [2024-06-21 19:51:02,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:02,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:02,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:02,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:02,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:51:02,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 559 transitions, 11666 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:02,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:02,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:51:02,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:05,679 INFO L124 PetriNetUnfolderBase]: 6036/9624 cut-off events. [2024-06-21 19:51:05,679 INFO L125 PetriNetUnfolderBase]: For 751965/751971 co-relation queries the response was YES. [2024-06-21 19:51:05,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81203 conditions, 9624 events. 6036/9624 cut-off events. For 751965/751971 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 64597 event pairs, 1417 based on Foata normal form. 31/9650 useless extension candidates. Maximal degree in co-relation 81041. Up to 7526 conditions per place. [2024-06-21 19:51:05,833 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 376 selfloop transitions, 229 changer transitions 0/610 dead transitions. [2024-06-21 19:51:05,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 610 transitions, 13754 flow [2024-06-21 19:51:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:51:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:51:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 19:51:05,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 19:51:05,835 INFO L175 Difference]: Start difference. First operand has 310 places, 559 transitions, 11666 flow. Second operand 9 states and 174 transitions. [2024-06-21 19:51:05,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 610 transitions, 13754 flow [2024-06-21 19:51:08,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 610 transitions, 13550 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 19:51:08,136 INFO L231 Difference]: Finished difference. Result has 311 places, 561 transitions, 11977 flow [2024-06-21 19:51:08,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11462, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11977, PETRI_PLACES=311, PETRI_TRANSITIONS=561} [2024-06-21 19:51:08,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-21 19:51:08,137 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 561 transitions, 11977 flow [2024-06-21 19:51:08,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:08,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:08,137 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 19:51:08,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:51:08,138 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:51:08,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash -914153261, now seen corresponding path program 12 times [2024-06-21 19:51:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:08,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478534423] [2024-06-21 19:51:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:08,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:12,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:12,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478534423] [2024-06-21 19:51:12,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478534423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:12,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:12,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:51:12,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983276374] [2024-06-21 19:51:12,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:12,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:51:12,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:51:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:51:12,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:51:12,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 561 transitions, 11977 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:12,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:12,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:51:12,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:16,984 INFO L124 PetriNetUnfolderBase]: 6395/10204 cut-off events. [2024-06-21 19:51:16,984 INFO L125 PetriNetUnfolderBase]: For 833529/833535 co-relation queries the response was YES. [2024-06-21 19:51:17,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86109 conditions, 10204 events. 6395/10204 cut-off events. For 833529/833535 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 69385 event pairs, 1519 based on Foata normal form. 51/10250 useless extension candidates. Maximal degree in co-relation 85946. Up to 8012 conditions per place. [2024-06-21 19:51:17,176 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 377 selfloop transitions, 235 changer transitions 0/617 dead transitions. [2024-06-21 19:51:17,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 617 transitions, 14122 flow [2024-06-21 19:51:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:51:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:51:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 19:51:17,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 19:51:17,177 INFO L175 Difference]: Start difference. First operand has 311 places, 561 transitions, 11977 flow. Second operand 10 states and 190 transitions. [2024-06-21 19:51:17,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 617 transitions, 14122 flow [2024-06-21 19:51:19,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 617 transitions, 13734 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 19:51:19,785 INFO L231 Difference]: Finished difference. Result has 316 places, 566 transitions, 12210 flow [2024-06-21 19:51:19,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11589, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12210, PETRI_PLACES=316, PETRI_TRANSITIONS=566} [2024-06-21 19:51:19,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-21 19:51:19,786 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 566 transitions, 12210 flow [2024-06-21 19:51:19,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:19,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:19,787 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 19:51:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:51:19,787 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:51:19,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:19,787 INFO L85 PathProgramCache]: Analyzing trace with hash 561873721, now seen corresponding path program 13 times [2024-06-21 19:51:19,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:19,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901022235] [2024-06-21 19:51:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:23,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:23,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901022235] [2024-06-21 19:51:23,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901022235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:23,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:23,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:51:23,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095137183] [2024-06-21 19:51:23,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:23,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:51:23,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:23,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:51:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:51:23,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:51:23,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 566 transitions, 12210 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:23,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:23,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:51:23,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:28,236 INFO L124 PetriNetUnfolderBase]: 6595/10536 cut-off events. [2024-06-21 19:51:28,237 INFO L125 PetriNetUnfolderBase]: For 808726/808732 co-relation queries the response was YES. [2024-06-21 19:51:28,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88735 conditions, 10536 events. 6595/10536 cut-off events. For 808726/808732 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 72069 event pairs, 1501 based on Foata normal form. 25/10556 useless extension candidates. Maximal degree in co-relation 88571. Up to 8013 conditions per place. [2024-06-21 19:51:28,396 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 384 selfloop transitions, 245 changer transitions 0/634 dead transitions. [2024-06-21 19:51:28,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 634 transitions, 14489 flow [2024-06-21 19:51:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:51:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:51:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 19:51:28,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 19:51:28,397 INFO L175 Difference]: Start difference. First operand has 316 places, 566 transitions, 12210 flow. Second operand 11 states and 210 transitions. [2024-06-21 19:51:28,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 634 transitions, 14489 flow [2024-06-21 19:51:30,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 634 transitions, 14049 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 19:51:30,906 INFO L231 Difference]: Finished difference. Result has 321 places, 574 transitions, 12472 flow [2024-06-21 19:51:30,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11770, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12472, PETRI_PLACES=321, PETRI_TRANSITIONS=574} [2024-06-21 19:51:30,907 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-21 19:51:30,907 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 574 transitions, 12472 flow [2024-06-21 19:51:30,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:30,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:30,907 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 19:51:30,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:51:30,907 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:51:30,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 768947893, now seen corresponding path program 3 times [2024-06-21 19:51:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:30,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112885386] [2024-06-21 19:51:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:34,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:34,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112885386] [2024-06-21 19:51:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112885386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:34,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:34,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:51:34,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888758148] [2024-06-21 19:51:34,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:34,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:51:34,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:51:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:51:34,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:51:34,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 574 transitions, 12472 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 19:51:34,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:34,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:51:34,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:39,194 INFO L124 PetriNetUnfolderBase]: 7012/11237 cut-off events. [2024-06-21 19:51:39,194 INFO L125 PetriNetUnfolderBase]: For 929504/929510 co-relation queries the response was YES. [2024-06-21 19:51:39,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96749 conditions, 11237 events. 7012/11237 cut-off events. For 929504/929510 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 77987 event pairs, 1618 based on Foata normal form. 19/11251 useless extension candidates. Maximal degree in co-relation 96584. Up to 6927 conditions per place. [2024-06-21 19:51:39,383 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 396 selfloop transitions, 237 changer transitions 0/638 dead transitions. [2024-06-21 19:51:39,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 638 transitions, 15150 flow [2024-06-21 19:51:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:51:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:51:39,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 19:51:39,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 19:51:39,385 INFO L175 Difference]: Start difference. First operand has 321 places, 574 transitions, 12472 flow. Second operand 9 states and 177 transitions. [2024-06-21 19:51:39,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 638 transitions, 15150 flow [2024-06-21 19:51:42,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 638 transitions, 14592 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 19:51:42,354 INFO L231 Difference]: Finished difference. Result has 323 places, 582 transitions, 12689 flow [2024-06-21 19:51:42,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11914, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12689, PETRI_PLACES=323, PETRI_TRANSITIONS=582} [2024-06-21 19:51:42,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-21 19:51:42,355 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 582 transitions, 12689 flow [2024-06-21 19:51:42,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 19:51:42,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:42,355 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 19:51:42,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:51:42,355 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:51:42,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:42,356 INFO L85 PathProgramCache]: Analyzing trace with hash 31493217, now seen corresponding path program 14 times [2024-06-21 19:51:42,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:42,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24669505] [2024-06-21 19:51:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:45,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:45,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24669505] [2024-06-21 19:51:45,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24669505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:45,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:45,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:45,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127521919] [2024-06-21 19:51:45,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:45,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:45,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:45,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:51:45,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 582 transitions, 12689 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:45,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:45,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:51:45,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:50,011 INFO L124 PetriNetUnfolderBase]: 7149/11448 cut-off events. [2024-06-21 19:51:50,011 INFO L125 PetriNetUnfolderBase]: For 991231/991243 co-relation queries the response was YES. [2024-06-21 19:51:50,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98834 conditions, 11448 events. 7149/11448 cut-off events. For 991231/991243 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 80058 event pairs, 1658 based on Foata normal form. 42/11482 useless extension candidates. Maximal degree in co-relation 98667. Up to 9517 conditions per place. [2024-06-21 19:51:50,149 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 395 selfloop transitions, 230 changer transitions 0/630 dead transitions. [2024-06-21 19:51:50,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 630 transitions, 14853 flow [2024-06-21 19:51:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:51:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:51:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 19:51:50,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 19:51:50,151 INFO L175 Difference]: Start difference. First operand has 323 places, 582 transitions, 12689 flow. Second operand 9 states and 168 transitions. [2024-06-21 19:51:50,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 630 transitions, 14853 flow [2024-06-21 19:51:52,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 630 transitions, 14553 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 19:51:52,887 INFO L231 Difference]: Finished difference. Result has 327 places, 583 transitions, 12896 flow [2024-06-21 19:51:52,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12389, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12896, PETRI_PLACES=327, PETRI_TRANSITIONS=583} [2024-06-21 19:51:52,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-21 19:51:52,888 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 583 transitions, 12896 flow [2024-06-21 19:51:52,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:52,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:52,888 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 19:51:52,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:51:52,889 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:51:52,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:52,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1851662811, now seen corresponding path program 15 times [2024-06-21 19:51:52,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:52,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99714288] [2024-06-21 19:51:52,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:52,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:56,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:56,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99714288] [2024-06-21 19:51:56,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99714288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:56,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:56,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:51:56,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665878684] [2024-06-21 19:51:56,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:56,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:51:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:51:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:51:56,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:51:56,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 583 transitions, 12896 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:56,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:56,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:51:56,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:01,201 INFO L124 PetriNetUnfolderBase]: 7188/11519 cut-off events. [2024-06-21 19:52:01,201 INFO L125 PetriNetUnfolderBase]: For 998905/998907 co-relation queries the response was YES. [2024-06-21 19:52:01,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98840 conditions, 11519 events. 7188/11519 cut-off events. For 998905/998907 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 80598 event pairs, 1757 based on Foata normal form. 50/11561 useless extension candidates. Maximal degree in co-relation 98671. Up to 9463 conditions per place. [2024-06-21 19:52:01,368 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 382 selfloop transitions, 249 changer transitions 0/636 dead transitions. [2024-06-21 19:52:01,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 636 transitions, 15121 flow [2024-06-21 19:52:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:52:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:52:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 19:52:01,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-21 19:52:01,370 INFO L175 Difference]: Start difference. First operand has 327 places, 583 transitions, 12896 flow. Second operand 10 states and 184 transitions. [2024-06-21 19:52:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 636 transitions, 15121 flow [2024-06-21 19:52:04,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 636 transitions, 14677 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 19:52:04,263 INFO L231 Difference]: Finished difference. Result has 330 places, 586 transitions, 13086 flow [2024-06-21 19:52:04,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12452, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13086, PETRI_PLACES=330, PETRI_TRANSITIONS=586} [2024-06-21 19:52:04,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-21 19:52:04,264 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 586 transitions, 13086 flow [2024-06-21 19:52:04,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:52:04,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:04,264 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 19:52:04,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:52:04,264 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:52:04,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:04,265 INFO L85 PathProgramCache]: Analyzing trace with hash 359575977, now seen corresponding path program 16 times [2024-06-21 19:52:04,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:04,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899371469] [2024-06-21 19:52:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:04,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:08,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:08,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899371469] [2024-06-21 19:52:08,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899371469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:08,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:08,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:52:08,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628671065] [2024-06-21 19:52:08,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:08,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:52:08,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:52:08,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:52:08,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:52:08,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 586 transitions, 13086 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:52:08,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:08,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:52:08,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:13,250 INFO L124 PetriNetUnfolderBase]: 7246/11621 cut-off events. [2024-06-21 19:52:13,251 INFO L125 PetriNetUnfolderBase]: For 950845/950847 co-relation queries the response was YES. [2024-06-21 19:52:13,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99660 conditions, 11621 events. 7246/11621 cut-off events. For 950845/950847 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 81510 event pairs, 1737 based on Foata normal form. 24/11637 useless extension candidates. Maximal degree in co-relation 99491. Up to 9372 conditions per place. [2024-06-21 19:52:13,397 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 391 selfloop transitions, 254 changer transitions 0/650 dead transitions. [2024-06-21 19:52:13,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 650 transitions, 15434 flow [2024-06-21 19:52:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:52:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:52:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 19:52:13,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2024-06-21 19:52:13,398 INFO L175 Difference]: Start difference. First operand has 330 places, 586 transitions, 13086 flow. Second operand 11 states and 204 transitions. [2024-06-21 19:52:13,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 650 transitions, 15434 flow [2024-06-21 19:52:16,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 650 transitions, 14869 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 19:52:16,070 INFO L231 Difference]: Finished difference. Result has 335 places, 591 transitions, 13212 flow [2024-06-21 19:52:16,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12521, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13212, PETRI_PLACES=335, PETRI_TRANSITIONS=591} [2024-06-21 19:52:16,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-21 19:52:16,071 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 591 transitions, 13212 flow [2024-06-21 19:52:16,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:52:16,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:16,071 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 19:52:16,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:52:16,071 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:52:16,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1177948219, now seen corresponding path program 4 times [2024-06-21 19:52:16,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:16,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998898177] [2024-06-21 19:52:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:16,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:19,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:19,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998898177] [2024-06-21 19:52:19,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998898177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:19,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:19,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:52:19,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195261286] [2024-06-21 19:52:19,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:19,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:52:19,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:52:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:52:19,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:52:19,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 591 transitions, 13212 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:52:19,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:19,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:52:19,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:24,564 INFO L124 PetriNetUnfolderBase]: 7334/11776 cut-off events. [2024-06-21 19:52:24,564 INFO L125 PetriNetUnfolderBase]: For 956497/956509 co-relation queries the response was YES. [2024-06-21 19:52:24,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100505 conditions, 11776 events. 7334/11776 cut-off events. For 956497/956509 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 82808 event pairs, 1674 based on Foata normal form. 30/11798 useless extension candidates. Maximal degree in co-relation 100334. Up to 9664 conditions per place. [2024-06-21 19:52:24,714 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 229 changer transitions 0/646 dead transitions. [2024-06-21 19:52:24,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 646 transitions, 15738 flow [2024-06-21 19:52:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:52:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:52:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 19:52:24,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 19:52:24,716 INFO L175 Difference]: Start difference. First operand has 335 places, 591 transitions, 13212 flow. Second operand 9 states and 171 transitions. [2024-06-21 19:52:24,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 646 transitions, 15738 flow [2024-06-21 19:52:27,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 646 transitions, 15125 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-21 19:52:27,647 INFO L231 Difference]: Finished difference. Result has 337 places, 594 transitions, 13198 flow [2024-06-21 19:52:27,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12599, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13198, PETRI_PLACES=337, PETRI_TRANSITIONS=594} [2024-06-21 19:52:27,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-21 19:52:27,648 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 594 transitions, 13198 flow [2024-06-21 19:52:27,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:52:27,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:27,648 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 19:52:27,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:52:27,649 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:52:27,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash 600978337, now seen corresponding path program 5 times [2024-06-21 19:52:27,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:27,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571754686] [2024-06-21 19:52:27,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:27,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:32,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:32,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571754686] [2024-06-21 19:52:32,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571754686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:32,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:32,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:52:32,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373892807] [2024-06-21 19:52:32,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:32,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:52:32,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:32,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:52:32,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:52:32,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:52:32,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 594 transitions, 13198 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 19:52:32,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:32,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:52:32,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:36,743 INFO L124 PetriNetUnfolderBase]: 7328/11773 cut-off events. [2024-06-21 19:52:36,744 INFO L125 PetriNetUnfolderBase]: For 941127/941139 co-relation queries the response was YES. [2024-06-21 19:52:36,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99126 conditions, 11773 events. 7328/11773 cut-off events. For 941127/941139 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 82300 event pairs, 1605 based on Foata normal form. 30/11795 useless extension candidates. Maximal degree in co-relation 98953. Up to 5327 conditions per place. [2024-06-21 19:52:36,893 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 390 selfloop transitions, 254 changer transitions 0/649 dead transitions. [2024-06-21 19:52:36,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 649 transitions, 15672 flow [2024-06-21 19:52:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:52:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:52:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 19:52:36,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 19:52:36,895 INFO L175 Difference]: Start difference. First operand has 337 places, 594 transitions, 13198 flow. Second operand 9 states and 170 transitions. [2024-06-21 19:52:36,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 649 transitions, 15672 flow [2024-06-21 19:52:39,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 649 transitions, 15354 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 19:52:39,907 INFO L231 Difference]: Finished difference. Result has 343 places, 599 transitions, 13695 flow [2024-06-21 19:52:39,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12880, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13695, PETRI_PLACES=343, PETRI_TRANSITIONS=599} [2024-06-21 19:52:39,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-21 19:52:39,908 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 599 transitions, 13695 flow [2024-06-21 19:52:39,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 19:52:39,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:39,909 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 19:52:39,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:52:39,909 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:52:39,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash -54307159, now seen corresponding path program 2 times [2024-06-21 19:52:39,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:39,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667598600] [2024-06-21 19:52:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:39,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:43,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:43,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667598600] [2024-06-21 19:52:43,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667598600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:43,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:43,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:52:43,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472646926] [2024-06-21 19:52:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:43,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:52:43,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:43,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:52:43,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:52:43,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:52:43,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 599 transitions, 13695 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:52:43,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:43,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:52:43,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:47,616 INFO L124 PetriNetUnfolderBase]: 7358/11843 cut-off events. [2024-06-21 19:52:47,616 INFO L125 PetriNetUnfolderBase]: For 940875/940875 co-relation queries the response was YES. [2024-06-21 19:52:47,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101857 conditions, 11843 events. 7358/11843 cut-off events. For 940875/940875 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 83392 event pairs, 2437 based on Foata normal form. 4/11843 useless extension candidates. Maximal degree in co-relation 101680. Up to 11336 conditions per place. [2024-06-21 19:52:47,968 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 553 selfloop transitions, 75 changer transitions 0/633 dead transitions. [2024-06-21 19:52:47,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 633 transitions, 15287 flow [2024-06-21 19:52:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:52:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:52:47,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 19:52:47,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 19:52:47,969 INFO L175 Difference]: Start difference. First operand has 343 places, 599 transitions, 13695 flow. Second operand 8 states and 146 transitions. [2024-06-21 19:52:47,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 633 transitions, 15287 flow [2024-06-21 19:52:50,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 633 transitions, 14959 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 19:52:51,001 INFO L231 Difference]: Finished difference. Result has 347 places, 607 transitions, 13590 flow [2024-06-21 19:52:51,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13367, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13590, PETRI_PLACES=347, PETRI_TRANSITIONS=607} [2024-06-21 19:52:51,002 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-21 19:52:51,002 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 607 transitions, 13590 flow [2024-06-21 19:52:51,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:52:51,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:51,003 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 19:52:51,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:52:51,003 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:52:51,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:51,003 INFO L85 PathProgramCache]: Analyzing trace with hash -234542603, now seen corresponding path program 3 times [2024-06-21 19:52:51,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:51,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780500680] [2024-06-21 19:52:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:51,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:55,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780500680] [2024-06-21 19:52:55,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780500680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:55,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:55,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:52:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055912908] [2024-06-21 19:52:55,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:52:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:52:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:52:55,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 19:52:55,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 607 transitions, 13590 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:52:55,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:55,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 19:52:55,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand