./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_power.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_power.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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_power.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_power.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-7724a2d-m [2024-06-28 00:33:43,458 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:33:43,532 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:33:43,538 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:33:43,538 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:33:43,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:33:43,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:33:43,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:33:43,564 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:33:43,567 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:33:43,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:33:43,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:33:43,568 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:33:43,569 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:33:43,569 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:33:43,570 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:33:43,570 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:33:43,570 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:33:43,570 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:33:43,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:33:43,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:33:43,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:33:43,571 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:33:43,571 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:33:43,571 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:33:43,572 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:33:43,572 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:33:43,572 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:33:43,572 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:33:43,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:33:43,573 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:33:43,574 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:33:43,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:33:43,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:33:43,574 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:33:43,574 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:33:43,574 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:33:43,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:33:43,575 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:33:43,575 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:33:43,575 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:33:43,575 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:33:43,575 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:33:43,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:33:43,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:33:43,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:33:43,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:33:43,807 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:33:43,808 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:33:43,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_power.i [2024-06-28 00:33:44,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:33:45,165 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:33:45,166 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_power.i [2024-06-28 00:33:45,180 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd59d498b/13f4ac49234f44bba693a0aac010b321/FLAGbf7a37214 [2024-06-28 00:33:45,192 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd59d498b/13f4ac49234f44bba693a0aac010b321 [2024-06-28 00:33:45,194 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:33:45,195 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:33:45,195 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe025_power.yml/witness.yml [2024-06-28 00:33:45,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:33:45,272 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:33:45,273 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:33:45,273 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:33:45,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:33:45,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:33:45" (1/2) ... [2024-06-28 00:33:45,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65581eb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:33:45, skipping insertion in model container [2024-06-28 00:33:45,279 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:33:45" (1/2) ... [2024-06-28 00:33:45,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@379e236f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:33:45, skipping insertion in model container [2024-06-28 00:33:45,282 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:33:45" (2/2) ... [2024-06-28 00:33:45,283 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65581eb6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45, skipping insertion in model container [2024-06-28 00:33:45,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:33:45" (2/2) ... [2024-06-28 00:33:45,283 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:33:45,305 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:33:45,307 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 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_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_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 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) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:33:45,307 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 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$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$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_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 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) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:33:45,307 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff1 >= 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_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_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 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) && (long long )x$r_buff0_thd2 - (long long )x$r_buff1_thd2 >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff0_used >= 0LL) && (long long )x$r_buff0_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$r_buff1_thd2 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-28 00:33:45,308 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:33:45,308 INFO L106 edCorrectnessWitness]: ghost_update [L874-L874] multithreaded = 1; [2024-06-28 00:33:45,349 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:33:45,648 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:33:45,661 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:33:45,839 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:33:45,881 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:33:45,882 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45 WrapperNode [2024-06-28 00:33:45,882 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:33:45,883 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:33:45,883 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:33:45,883 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:33:45,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:45,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:45,943 INFO L138 Inliner]: procedures = 175, calls = 78, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 243 [2024-06-28 00:33:45,944 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:33:45,944 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:33:45,944 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:33:45,944 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:33:45,953 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:45,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:45,962 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:45,999 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 9 writes are split as follows [0, 9]. [2024-06-28 00:33:46,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:46,000 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:46,011 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:46,013 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:46,015 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:46,017 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:46,023 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:33:46,024 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:33:46,024 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:33:46,024 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:33:46,025 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (1/1) ... [2024-06-28 00:33:46,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:33:46,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:33:46,053 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) [2024-06-28 00:33:46,060 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 [2024-06-28 00:33:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:33:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:33:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:33:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:33:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:33:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:33:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:33:46,085 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:33:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:33:46,085 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:33:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:33:46,086 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:33:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:33:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:33:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:33:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:33:46,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:33:46,087 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:33:46,198 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:33:46,199 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:33:46,807 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:33:46,807 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:33:47,441 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:33:47,442 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:33:47,442 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:33:47 BoogieIcfgContainer [2024-06-28 00:33:47,442 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:33:47,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:33:47,444 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:33:47,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:33:47,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:33:45" (1/4) ... [2024-06-28 00:33:47,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49263e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:33:47, skipping insertion in model container [2024-06-28 00:33:47,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:33:45" (2/4) ... [2024-06-28 00:33:47,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49263e9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:33:47, skipping insertion in model container [2024-06-28 00:33:47,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:33:45" (3/4) ... [2024-06-28 00:33:47,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49263e9e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:33:47, skipping insertion in model container [2024-06-28 00:33:47,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:33:47" (4/4) ... [2024-06-28 00:33:47,466 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_power.i [2024-06-28 00:33:47,482 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:33:47,482 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:33:47,482 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:33:47,552 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:33:47,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 00:33:47,613 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-28 00:33:47,614 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:33:47,616 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 60 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. [2024-06-28 00:33:47,616 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-28 00:33:47,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-28 00:33:47,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:33:47,659 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;@50a02ee5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:33:47,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:33:47,665 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:33:47,665 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 00:33:47,665 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:33:47,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:47,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:33:47,668 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)] === [2024-06-28 00:33:47,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:47,673 INFO L85 PathProgramCache]: Analyzing trace with hash 897516751, now seen corresponding path program 1 times [2024-06-28 00:33:47,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:47,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049233144] [2024-06-28 00:33:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:47,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:49,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:49,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049233144] [2024-06-28 00:33:49,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049233144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:49,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:49,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:33:49,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067299300] [2024-06-28 00:33:49,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:49,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:33:49,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:33:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:33:49,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-28 00:33:49,953 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) [2024-06-28 00:33:49,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:49,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-28 00:33:49,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:50,521 INFO L124 PetriNetUnfolderBase]: 1205/1912 cut-off events. [2024-06-28 00:33:50,521 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 00:33:50,527 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 9452 event pairs, 800 based on Foata normal form. 1/1879 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-28 00:33:50,536 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 00:33:50,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-28 00:33:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:33:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:33:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 00:33:50,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-28 00:33:50,548 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-28 00:33:50,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-28 00:33:50,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:33:50,553 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-28 00:33:50,555 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} [2024-06-28 00:33:50,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-28 00:33:50,558 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-28 00:33:50,558 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) [2024-06-28 00:33:50,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:50,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:50,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:33:50,559 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)] === [2024-06-28 00:33:50,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash -773869234, now seen corresponding path program 1 times [2024-06-28 00:33:50,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:50,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129593213] [2024-06-28 00:33:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:50,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129593213] [2024-06-28 00:33:51,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129593213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:51,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:51,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:33:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332452679] [2024-06-28 00:33:51,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:51,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:33:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:33:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:33:51,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:33:51,864 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) [2024-06-28 00:33:51,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:51,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:33:51,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:52,390 INFO L124 PetriNetUnfolderBase]: 1406/2140 cut-off events. [2024-06-28 00:33:52,391 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-28 00:33:52,393 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 10279 event pairs, 805 based on Foata normal form. 3/2143 useless extension candidates. Maximal degree in co-relation 4887. Up to 2087 conditions per place. [2024-06-28 00:33:52,400 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-28 00:33:52,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 262 flow [2024-06-28 00:33:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:33:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:33:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-28 00:33:52,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290697674418605 [2024-06-28 00:33:52,402 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 91 transitions. [2024-06-28 00:33:52,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 262 flow [2024-06-28 00:33:52,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:33:52,404 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-28 00:33:52,405 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} [2024-06-28 00:33:52,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-28 00:33:52,405 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-28 00:33:52,405 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) [2024-06-28 00:33:52,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:52,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:52,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:33:52,406 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)] === [2024-06-28 00:33:52,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash -658952691, now seen corresponding path program 1 times [2024-06-28 00:33:52,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:52,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338434962] [2024-06-28 00:33:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:52,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:54,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:54,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338434962] [2024-06-28 00:33:54,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338434962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:54,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:54,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:33:54,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651478087] [2024-06-28 00:33:54,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:54,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:33:54,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:33:54,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:33:54,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:33:54,720 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) [2024-06-28 00:33:54,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:54,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:33:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:55,350 INFO L124 PetriNetUnfolderBase]: 1399/2131 cut-off events. [2024-06-28 00:33:55,351 INFO L125 PetriNetUnfolderBase]: For 1149/1149 co-relation queries the response was YES. [2024-06-28 00:33:55,354 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 10206 event pairs, 652 based on Foata normal form. 4/2135 useless extension candidates. Maximal degree in co-relation 5412. Up to 2041 conditions per place. [2024-06-28 00:33:55,364 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-28 00:33:55,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 79 transitions, 404 flow [2024-06-28 00:33:55,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:33:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:33:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-28 00:33:55,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441860465116279 [2024-06-28 00:33:55,370 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 117 transitions. [2024-06-28 00:33:55,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 79 transitions, 404 flow [2024-06-28 00:33:55,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 79 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:33:55,373 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 222 flow [2024-06-28 00:33:55,373 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} [2024-06-28 00:33:55,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-28 00:33:55,375 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 222 flow [2024-06-28 00:33:55,375 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) [2024-06-28 00:33:55,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:55,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:55,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:33:55,375 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)] === [2024-06-28 00:33:55,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash 801655564, now seen corresponding path program 1 times [2024-06-28 00:33:55,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:55,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662885934] [2024-06-28 00:33:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:55,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:33:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:33:57,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:33:57,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662885934] [2024-06-28 00:33:57,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662885934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:33:57,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:33:57,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:33:57,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082602021] [2024-06-28 00:33:57,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:33:57,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:33:57,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:33:57,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:33:57,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:33:57,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:33:57,956 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) [2024-06-28 00:33:57,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:33:57,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:33:57,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:33:58,656 INFO L124 PetriNetUnfolderBase]: 1388/2114 cut-off events. [2024-06-28 00:33:58,656 INFO L125 PetriNetUnfolderBase]: For 2565/2565 co-relation queries the response was YES. [2024-06-28 00:33:58,660 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 10072 event pairs, 481 based on Foata normal form. 8/2122 useless extension candidates. Maximal degree in co-relation 6203. Up to 1974 conditions per place. [2024-06-28 00:33:58,670 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 65 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-28 00:33:58,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 496 flow [2024-06-28 00:33:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:33:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:33:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-28 00:33:58,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2024-06-28 00:33:58,673 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 222 flow. Second operand 6 states and 134 transitions. [2024-06-28 00:33:58,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 496 flow [2024-06-28 00:33:58,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 00:33:58,680 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 269 flow [2024-06-28 00:33:58,680 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} [2024-06-28 00:33:58,682 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-28 00:33:58,682 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 269 flow [2024-06-28 00:33:58,682 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) [2024-06-28 00:33:58,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:33:58,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:33:58,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:33:58,683 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)] === [2024-06-28 00:33:58,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:33:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1439877066, now seen corresponding path program 1 times [2024-06-28 00:33:58,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:33:58,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712792434] [2024-06-28 00:33:58,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:33:58,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:33:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:00,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:00,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712792434] [2024-06-28 00:34:00,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712792434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:00,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:00,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:00,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059401365] [2024-06-28 00:34:00,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:00,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:00,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:00,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:00,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:00,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:34:00,441 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) [2024-06-28 00:34:00,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:00,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:34:00,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:01,072 INFO L124 PetriNetUnfolderBase]: 1222/1902 cut-off events. [2024-06-28 00:34:01,073 INFO L125 PetriNetUnfolderBase]: For 3861/3882 co-relation queries the response was YES. [2024-06-28 00:34:01,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6021 conditions, 1902 events. 1222/1902 cut-off events. For 3861/3882 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9475 event pairs, 745 based on Foata normal form. 10/1871 useless extension candidates. Maximal degree in co-relation 6000. Up to 1804 conditions per place. [2024-06-28 00:34:01,086 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2024-06-28 00:34:01,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 441 flow [2024-06-28 00:34:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:34:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:34:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-28 00:34:01,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 00:34:01,090 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 269 flow. Second operand 5 states and 95 transitions. [2024-06-28 00:34:01,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 441 flow [2024-06-28 00:34:01,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 406 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 00:34:01,097 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 296 flow [2024-06-28 00:34:01,097 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-28 00:34:01,099 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-28 00:34:01,099 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 296 flow [2024-06-28 00:34:01,100 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) [2024-06-28 00:34:01,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:01,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:01,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:34:01,100 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)] === [2024-06-28 00:34:01,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:01,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1822521431, now seen corresponding path program 1 times [2024-06-28 00:34:01,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:01,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737093080] [2024-06-28 00:34:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:01,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:02,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:02,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737093080] [2024-06-28 00:34:02,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737093080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:02,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792714580] [2024-06-28 00:34:02,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:02,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:02,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:02,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 296 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) [2024-06-28 00:34:02,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:02,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:02,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:03,826 INFO L124 PetriNetUnfolderBase]: 1398/2141 cut-off events. [2024-06-28 00:34:03,826 INFO L125 PetriNetUnfolderBase]: For 4616/4616 co-relation queries the response was YES. [2024-06-28 00:34:03,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7200 conditions, 2141 events. 1398/2141 cut-off events. For 4616/4616 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10220 event pairs, 556 based on Foata normal form. 6/2147 useless extension candidates. Maximal degree in co-relation 7176. Up to 1978 conditions per place. [2024-06-28 00:34:03,838 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 70 selfloop transitions, 27 changer transitions 0/102 dead transitions. [2024-06-28 00:34:03,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 706 flow [2024-06-28 00:34:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:34:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:34:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 00:34:03,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-28 00:34:03,840 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 296 flow. Second operand 7 states and 138 transitions. [2024-06-28 00:34:03,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 706 flow [2024-06-28 00:34:03,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 102 transitions, 687 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:03,844 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 444 flow [2024-06-28 00:34:03,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-28 00:34:03,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-28 00:34:03,845 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 444 flow [2024-06-28 00:34:03,846 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) [2024-06-28 00:34:03,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:03,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:03,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:34:03,846 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)] === [2024-06-28 00:34:03,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:03,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1540799459, now seen corresponding path program 2 times [2024-06-28 00:34:03,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:03,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795242631] [2024-06-28 00:34:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:03,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:05,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:05,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795242631] [2024-06-28 00:34:05,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795242631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:05,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:05,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:05,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648180180] [2024-06-28 00:34:05,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:05,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:05,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:05,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:05,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:05,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:05,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 444 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) [2024-06-28 00:34:05,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:05,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:05,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:06,505 INFO L124 PetriNetUnfolderBase]: 1419/2188 cut-off events. [2024-06-28 00:34:06,506 INFO L125 PetriNetUnfolderBase]: For 6575/6575 co-relation queries the response was YES. [2024-06-28 00:34:06,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8294 conditions, 2188 events. 1419/2188 cut-off events. For 6575/6575 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10382 event pairs, 562 based on Foata normal form. 12/2199 useless extension candidates. Maximal degree in co-relation 8267. Up to 2083 conditions per place. [2024-06-28 00:34:06,521 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 72 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-28 00:34:06,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 96 transitions, 758 flow [2024-06-28 00:34:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-28 00:34:06,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-28 00:34:06,522 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 444 flow. Second operand 6 states and 111 transitions. [2024-06-28 00:34:06,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 96 transitions, 758 flow [2024-06-28 00:34:06,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 697 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:06,528 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 524 flow [2024-06-28 00:34:06,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-06-28 00:34:06,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-28 00:34:06,529 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 524 flow [2024-06-28 00:34:06,529 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) [2024-06-28 00:34:06,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:06,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:06,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:34:06,529 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)] === [2024-06-28 00:34:06,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash 61118747, now seen corresponding path program 3 times [2024-06-28 00:34:06,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:06,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198696972] [2024-06-28 00:34:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:06,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:08,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:08,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198696972] [2024-06-28 00:34:08,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198696972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:08,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:08,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:34:08,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697002284] [2024-06-28 00:34:08,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:08,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:34:08,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:08,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:34:08,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:34:08,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:08,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 524 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) [2024-06-28 00:34:08,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:08,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:08,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:09,252 INFO L124 PetriNetUnfolderBase]: 1798/2798 cut-off events. [2024-06-28 00:34:09,252 INFO L125 PetriNetUnfolderBase]: For 12079/12079 co-relation queries the response was YES. [2024-06-28 00:34:09,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10319 conditions, 2798 events. 1798/2798 cut-off events. For 12079/12079 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14251 event pairs, 859 based on Foata normal form. 114/2911 useless extension candidates. Maximal degree in co-relation 10290. Up to 1935 conditions per place. [2024-06-28 00:34:09,267 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 70 selfloop transitions, 24 changer transitions 18/117 dead transitions. [2024-06-28 00:34:09,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 915 flow [2024-06-28 00:34:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:34:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:34:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 00:34:09,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 00:34:09,269 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 524 flow. Second operand 8 states and 144 transitions. [2024-06-28 00:34:09,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 915 flow [2024-06-28 00:34:09,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 892 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-28 00:34:09,274 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 618 flow [2024-06-28 00:34:09,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=618, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-28 00:34:09,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-28 00:34:09,275 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 618 flow [2024-06-28 00:34:09,275 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) [2024-06-28 00:34:09,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:09,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:09,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:34:09,276 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)] === [2024-06-28 00:34:09,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:09,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2089800764, now seen corresponding path program 1 times [2024-06-28 00:34:09,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:09,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413120787] [2024-06-28 00:34:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:09,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:12,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:12,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413120787] [2024-06-28 00:34:12,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413120787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:12,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:12,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:12,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272727258] [2024-06-28 00:34:12,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:12,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:12,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:12,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:12,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:12,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 618 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) [2024-06-28 00:34:12,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:12,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:12,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:13,385 INFO L124 PetriNetUnfolderBase]: 1864/2920 cut-off events. [2024-06-28 00:34:13,385 INFO L125 PetriNetUnfolderBase]: For 18667/18667 co-relation queries the response was YES. [2024-06-28 00:34:13,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11397 conditions, 2920 events. 1864/2920 cut-off events. For 18667/18667 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15278 event pairs, 827 based on Foata normal form. 107/3027 useless extension candidates. Maximal degree in co-relation 11363. Up to 1871 conditions per place. [2024-06-28 00:34:13,402 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 92 selfloop transitions, 37 changer transitions 6/140 dead transitions. [2024-06-28 00:34:13,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 140 transitions, 1196 flow [2024-06-28 00:34:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:34:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:34:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-28 00:34:13,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-28 00:34:13,405 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 618 flow. Second operand 9 states and 181 transitions. [2024-06-28 00:34:13,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 140 transitions, 1196 flow [2024-06-28 00:34:13,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 1144 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 00:34:13,415 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 711 flow [2024-06-28 00:34:13,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=711, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-28 00:34:13,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-28 00:34:13,415 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 711 flow [2024-06-28 00:34:13,416 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) [2024-06-28 00:34:13,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:13,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:13,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:34:13,416 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)] === [2024-06-28 00:34:13,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:13,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1750449460, now seen corresponding path program 2 times [2024-06-28 00:34:13,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:13,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549723397] [2024-06-28 00:34:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:13,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:15,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:15,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549723397] [2024-06-28 00:34:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549723397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:15,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:15,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774802871] [2024-06-28 00:34:15,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:15,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:16,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:16,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 711 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) [2024-06-28 00:34:16,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:16,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:16,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:17,386 INFO L124 PetriNetUnfolderBase]: 2244/3527 cut-off events. [2024-06-28 00:34:17,387 INFO L125 PetriNetUnfolderBase]: For 20470/20470 co-relation queries the response was YES. [2024-06-28 00:34:17,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14568 conditions, 3527 events. 2244/3527 cut-off events. For 20470/20470 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19303 event pairs, 1020 based on Foata normal form. 39/3564 useless extension candidates. Maximal degree in co-relation 14533. Up to 2871 conditions per place. [2024-06-28 00:34:17,404 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 93 selfloop transitions, 66 changer transitions 0/164 dead transitions. [2024-06-28 00:34:17,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 164 transitions, 1603 flow [2024-06-28 00:34:17,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:34:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:34:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-28 00:34:17,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164904862579281 [2024-06-28 00:34:17,406 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 711 flow. Second operand 11 states and 197 transitions. [2024-06-28 00:34:17,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 164 transitions, 1603 flow [2024-06-28 00:34:17,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 164 transitions, 1451 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 00:34:17,421 INFO L231 Difference]: Finished difference. Result has 91 places, 124 transitions, 1211 flow [2024-06-28 00:34:17,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1211, PETRI_PLACES=91, PETRI_TRANSITIONS=124} [2024-06-28 00:34:17,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-28 00:34:17,422 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 124 transitions, 1211 flow [2024-06-28 00:34:17,422 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) [2024-06-28 00:34:17,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:17,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:17,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:34:17,423 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)] === [2024-06-28 00:34:17,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:17,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1755211060, now seen corresponding path program 3 times [2024-06-28 00:34:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:17,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100499888] [2024-06-28 00:34:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:17,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:19,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:19,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100499888] [2024-06-28 00:34:19,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100499888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:19,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:19,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:19,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027329551] [2024-06-28 00:34:19,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:19,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:19,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:19,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:19,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:20,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:20,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 124 transitions, 1211 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) [2024-06-28 00:34:20,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:20,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:20,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:21,165 INFO L124 PetriNetUnfolderBase]: 1937/3063 cut-off events. [2024-06-28 00:34:21,166 INFO L125 PetriNetUnfolderBase]: For 21624/21624 co-relation queries the response was YES. [2024-06-28 00:34:21,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13565 conditions, 3063 events. 1937/3063 cut-off events. For 21624/21624 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16445 event pairs, 889 based on Foata normal form. 41/3102 useless extension candidates. Maximal degree in co-relation 13526. Up to 2797 conditions per place. [2024-06-28 00:34:21,180 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 83 selfloop transitions, 67 changer transitions 0/155 dead transitions. [2024-06-28 00:34:21,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 155 transitions, 1632 flow [2024-06-28 00:34:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:34:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:34:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 00:34:21,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-28 00:34:21,182 INFO L175 Difference]: Start difference. First operand has 91 places, 124 transitions, 1211 flow. Second operand 7 states and 138 transitions. [2024-06-28 00:34:21,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 155 transitions, 1632 flow [2024-06-28 00:34:21,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 155 transitions, 1506 flow, removed 63 selfloop flow, removed 1 redundant places. [2024-06-28 00:34:21,198 INFO L231 Difference]: Finished difference. Result has 97 places, 130 transitions, 1314 flow [2024-06-28 00:34:21,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=97, PETRI_TRANSITIONS=130} [2024-06-28 00:34:21,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-28 00:34:21,199 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 130 transitions, 1314 flow [2024-06-28 00:34:21,199 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) [2024-06-28 00:34:21,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:21,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:21,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:34:21,199 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)] === [2024-06-28 00:34:21,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash -428466892, now seen corresponding path program 4 times [2024-06-28 00:34:21,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:21,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360784941] [2024-06-28 00:34:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:21,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:23,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:23,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360784941] [2024-06-28 00:34:23,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360784941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:23,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:23,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:23,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607178339] [2024-06-28 00:34:23,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:23,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:23,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:23,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:23,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:23,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 130 transitions, 1314 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) [2024-06-28 00:34:23,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:23,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:23,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:24,898 INFO L124 PetriNetUnfolderBase]: 1349/2138 cut-off events. [2024-06-28 00:34:24,899 INFO L125 PetriNetUnfolderBase]: For 24093/24093 co-relation queries the response was YES. [2024-06-28 00:34:24,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11004 conditions, 2138 events. 1349/2138 cut-off events. For 24093/24093 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10715 event pairs, 579 based on Foata normal form. 39/2174 useless extension candidates. Maximal degree in co-relation 10961. Up to 1780 conditions per place. [2024-06-28 00:34:24,912 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 77 selfloop transitions, 78 changer transitions 0/160 dead transitions. [2024-06-28 00:34:24,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 160 transitions, 1814 flow [2024-06-28 00:34:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:34:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:34:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-28 00:34:24,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-28 00:34:24,913 INFO L175 Difference]: Start difference. First operand has 97 places, 130 transitions, 1314 flow. Second operand 7 states and 136 transitions. [2024-06-28 00:34:24,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 160 transitions, 1814 flow [2024-06-28 00:34:24,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 160 transitions, 1740 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 00:34:24,929 INFO L231 Difference]: Finished difference. Result has 102 places, 135 transitions, 1550 flow [2024-06-28 00:34:24,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1550, PETRI_PLACES=102, PETRI_TRANSITIONS=135} [2024-06-28 00:34:24,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-28 00:34:24,929 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 135 transitions, 1550 flow [2024-06-28 00:34:24,929 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) [2024-06-28 00:34:24,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:24,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:24,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:34:24,930 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:24,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1549974453, now seen corresponding path program 1 times [2024-06-28 00:34:24,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:24,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574094300] [2024-06-28 00:34:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:27,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:27,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574094300] [2024-06-28 00:34:27,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574094300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:27,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:27,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:34:27,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666636791] [2024-06-28 00:34:27,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:27,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:34:27,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:27,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:34:27,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:34:27,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:27,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 135 transitions, 1550 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:27,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:27,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:27,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:28,593 INFO L124 PetriNetUnfolderBase]: 1346/2147 cut-off events. [2024-06-28 00:34:28,594 INFO L125 PetriNetUnfolderBase]: For 29319/29319 co-relation queries the response was YES. [2024-06-28 00:34:28,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11952 conditions, 2147 events. 1346/2147 cut-off events. For 29319/29319 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10865 event pairs, 778 based on Foata normal form. 1/2148 useless extension candidates. Maximal degree in co-relation 11906. Up to 2051 conditions per place. [2024-06-28 00:34:28,607 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 126 selfloop transitions, 10 changer transitions 0/141 dead transitions. [2024-06-28 00:34:28,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 141 transitions, 1805 flow [2024-06-28 00:34:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:34:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:34:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-28 00:34:28,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-28 00:34:28,609 INFO L175 Difference]: Start difference. First operand has 102 places, 135 transitions, 1550 flow. Second operand 6 states and 94 transitions. [2024-06-28 00:34:28,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 141 transitions, 1805 flow [2024-06-28 00:34:28,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 141 transitions, 1703 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:28,629 INFO L231 Difference]: Finished difference. Result has 106 places, 132 transitions, 1433 flow [2024-06-28 00:34:28,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1433, PETRI_PLACES=106, PETRI_TRANSITIONS=132} [2024-06-28 00:34:28,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-28 00:34:28,630 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 132 transitions, 1433 flow [2024-06-28 00:34:28,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:28,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:28,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:28,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:34:28,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:28,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash -850722787, now seen corresponding path program 1 times [2024-06-28 00:34:28,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:28,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817408378] [2024-06-28 00:34:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:28,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:33,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817408378] [2024-06-28 00:34:33,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817408378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:33,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:33,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:33,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876382728] [2024-06-28 00:34:33,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:33,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:33,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:33,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:33,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:33,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:33,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 132 transitions, 1433 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:33,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:33,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:33,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:35,569 INFO L124 PetriNetUnfolderBase]: 1340/2139 cut-off events. [2024-06-28 00:34:35,569 INFO L125 PetriNetUnfolderBase]: For 27628/27628 co-relation queries the response was YES. [2024-06-28 00:34:35,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11751 conditions, 2139 events. 1340/2139 cut-off events. For 27628/27628 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10798 event pairs, 776 based on Foata normal form. 2/2141 useless extension candidates. Maximal degree in co-relation 11703. Up to 2037 conditions per place. [2024-06-28 00:34:35,601 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 128 selfloop transitions, 13 changer transitions 0/146 dead transitions. [2024-06-28 00:34:35,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 146 transitions, 1765 flow [2024-06-28 00:34:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:34:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:34:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 00:34:35,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554817275747508 [2024-06-28 00:34:35,617 INFO L175 Difference]: Start difference. First operand has 106 places, 132 transitions, 1433 flow. Second operand 7 states and 107 transitions. [2024-06-28 00:34:35,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 146 transitions, 1765 flow [2024-06-28 00:34:35,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 146 transitions, 1740 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 00:34:35,638 INFO L231 Difference]: Finished difference. Result has 108 places, 135 transitions, 1468 flow [2024-06-28 00:34:35,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1468, PETRI_PLACES=108, PETRI_TRANSITIONS=135} [2024-06-28 00:34:35,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-28 00:34:35,639 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 135 transitions, 1468 flow [2024-06-28 00:34:35,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:34:35,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:35,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:35,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:34:35,639 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)] === [2024-06-28 00:34:35,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash -721152811, now seen corresponding path program 1 times [2024-06-28 00:34:35,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:35,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194311271] [2024-06-28 00:34:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:35,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:39,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:39,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194311271] [2024-06-28 00:34:39,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194311271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:39,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:39,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:34:39,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709301517] [2024-06-28 00:34:39,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:39,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:34:39,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:39,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:34:39,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:34:39,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:39,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 135 transitions, 1468 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) [2024-06-28 00:34:39,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:39,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:39,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:40,881 INFO L124 PetriNetUnfolderBase]: 1544/2475 cut-off events. [2024-06-28 00:34:40,882 INFO L125 PetriNetUnfolderBase]: For 33784/33784 co-relation queries the response was YES. [2024-06-28 00:34:40,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13765 conditions, 2475 events. 1544/2475 cut-off events. For 33784/33784 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12936 event pairs, 406 based on Foata normal form. 30/2505 useless extension candidates. Maximal degree in co-relation 13718. Up to 1997 conditions per place. [2024-06-28 00:34:40,896 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 142 selfloop transitions, 66 changer transitions 0/213 dead transitions. [2024-06-28 00:34:40,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 213 transitions, 2354 flow [2024-06-28 00:34:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:34:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:34:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 00:34:40,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-28 00:34:40,898 INFO L175 Difference]: Start difference. First operand has 108 places, 135 transitions, 1468 flow. Second operand 10 states and 195 transitions. [2024-06-28 00:34:40,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 213 transitions, 2354 flow [2024-06-28 00:34:40,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 213 transitions, 2316 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:34:40,925 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1880 flow [2024-06-28 00:34:40,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1880, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2024-06-28 00:34:40,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-28 00:34:40,927 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1880 flow [2024-06-28 00:34:40,927 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) [2024-06-28 00:34:40,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:40,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:40,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:34:40,928 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)] === [2024-06-28 00:34:40,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash 772479595, now seen corresponding path program 2 times [2024-06-28 00:34:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:40,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962284252] [2024-06-28 00:34:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:40,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:43,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:43,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962284252] [2024-06-28 00:34:43,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962284252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:43,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:43,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:34:43,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945185943] [2024-06-28 00:34:43,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:34:43,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:43,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:34:43,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:34:43,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:43,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1880 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) [2024-06-28 00:34:43,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:43,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:43,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:44,883 INFO L124 PetriNetUnfolderBase]: 1699/2734 cut-off events. [2024-06-28 00:34:44,883 INFO L125 PetriNetUnfolderBase]: For 43077/43077 co-relation queries the response was YES. [2024-06-28 00:34:44,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16017 conditions, 2734 events. 1699/2734 cut-off events. For 43077/43077 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14537 event pairs, 561 based on Foata normal form. 30/2764 useless extension candidates. Maximal degree in co-relation 15966. Up to 2281 conditions per place. [2024-06-28 00:34:44,901 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 144 selfloop transitions, 70 changer transitions 0/219 dead transitions. [2024-06-28 00:34:44,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 219 transitions, 2650 flow [2024-06-28 00:34:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:34:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:34:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 00:34:44,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-28 00:34:44,903 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1880 flow. Second operand 10 states and 192 transitions. [2024-06-28 00:34:44,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 219 transitions, 2650 flow [2024-06-28 00:34:44,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 219 transitions, 2528 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 00:34:44,939 INFO L231 Difference]: Finished difference. Result has 124 places, 164 transitions, 2095 flow [2024-06-28 00:34:44,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2095, PETRI_PLACES=124, PETRI_TRANSITIONS=164} [2024-06-28 00:34:44,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-28 00:34:44,940 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 164 transitions, 2095 flow [2024-06-28 00:34:44,940 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) [2024-06-28 00:34:44,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:44,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:44,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:34:44,941 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)] === [2024-06-28 00:34:44,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash 276928115, now seen corresponding path program 3 times [2024-06-28 00:34:44,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:44,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466812340] [2024-06-28 00:34:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:44,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:48,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:48,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466812340] [2024-06-28 00:34:48,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466812340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:48,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:48,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:34:48,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947152189] [2024-06-28 00:34:48,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:48,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:34:48,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:48,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:34:48,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:34:48,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:48,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 164 transitions, 2095 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) [2024-06-28 00:34:48,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:48,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:48,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:49,233 INFO L124 PetriNetUnfolderBase]: 1730/2778 cut-off events. [2024-06-28 00:34:49,233 INFO L125 PetriNetUnfolderBase]: For 50961/50961 co-relation queries the response was YES. [2024-06-28 00:34:49,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17014 conditions, 2778 events. 1730/2778 cut-off events. For 50961/50961 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14790 event pairs, 605 based on Foata normal form. 6/2784 useless extension candidates. Maximal degree in co-relation 16959. Up to 2426 conditions per place. [2024-06-28 00:34:49,253 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 120 selfloop transitions, 83 changer transitions 0/208 dead transitions. [2024-06-28 00:34:49,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 208 transitions, 2697 flow [2024-06-28 00:34:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:34:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:34:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 00:34:49,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-28 00:34:49,254 INFO L175 Difference]: Start difference. First operand has 124 places, 164 transitions, 2095 flow. Second operand 9 states and 169 transitions. [2024-06-28 00:34:49,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 208 transitions, 2697 flow [2024-06-28 00:34:49,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 208 transitions, 2553 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 00:34:49,296 INFO L231 Difference]: Finished difference. Result has 128 places, 167 transitions, 2204 flow [2024-06-28 00:34:49,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2204, PETRI_PLACES=128, PETRI_TRANSITIONS=167} [2024-06-28 00:34:49,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-28 00:34:49,296 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 167 transitions, 2204 flow [2024-06-28 00:34:49,297 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) [2024-06-28 00:34:49,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:49,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:49,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:34:49,297 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)] === [2024-06-28 00:34:49,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:49,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2066299763, now seen corresponding path program 4 times [2024-06-28 00:34:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:49,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659141605] [2024-06-28 00:34:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:51,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:51,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659141605] [2024-06-28 00:34:51,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659141605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:51,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:51,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:34:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355700626] [2024-06-28 00:34:51,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:51,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:34:51,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:34:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:34:51,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:51,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 167 transitions, 2204 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) [2024-06-28 00:34:51,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:51,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:51,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:52,561 INFO L124 PetriNetUnfolderBase]: 2026/3269 cut-off events. [2024-06-28 00:34:52,561 INFO L125 PetriNetUnfolderBase]: For 61824/61824 co-relation queries the response was YES. [2024-06-28 00:34:52,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19790 conditions, 3269 events. 2026/3269 cut-off events. For 61824/61824 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18103 event pairs, 633 based on Foata normal form. 30/3299 useless extension candidates. Maximal degree in co-relation 19733. Up to 2627 conditions per place. [2024-06-28 00:34:52,583 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 161 selfloop transitions, 84 changer transitions 0/250 dead transitions. [2024-06-28 00:34:52,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 250 transitions, 3271 flow [2024-06-28 00:34:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:34:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:34:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-28 00:34:52,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-28 00:34:52,586 INFO L175 Difference]: Start difference. First operand has 128 places, 167 transitions, 2204 flow. Second operand 9 states and 188 transitions. [2024-06-28 00:34:52,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 250 transitions, 3271 flow [2024-06-28 00:34:52,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 250 transitions, 3024 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 00:34:52,638 INFO L231 Difference]: Finished difference. Result has 134 places, 193 transitions, 2637 flow [2024-06-28 00:34:52,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2637, PETRI_PLACES=134, PETRI_TRANSITIONS=193} [2024-06-28 00:34:52,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-28 00:34:52,639 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 193 transitions, 2637 flow [2024-06-28 00:34:52,639 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) [2024-06-28 00:34:52,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:52,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:52,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:34:52,639 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)] === [2024-06-28 00:34:52,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1395535403, now seen corresponding path program 5 times [2024-06-28 00:34:52,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:52,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767745773] [2024-06-28 00:34:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:52,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:55,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:55,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767745773] [2024-06-28 00:34:55,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767745773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:55,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:55,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:34:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050348014] [2024-06-28 00:34:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:55,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:34:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:34:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:34:55,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:34:55,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 193 transitions, 2637 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) [2024-06-28 00:34:55,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:55,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:34:55,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:56,429 INFO L124 PetriNetUnfolderBase]: 2256/3649 cut-off events. [2024-06-28 00:34:56,430 INFO L125 PetriNetUnfolderBase]: For 79588/79588 co-relation queries the response was YES. [2024-06-28 00:34:56,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22608 conditions, 3649 events. 2256/3649 cut-off events. For 79588/79588 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20774 event pairs, 846 based on Foata normal form. 30/3679 useless extension candidates. Maximal degree in co-relation 22547. Up to 3039 conditions per place. [2024-06-28 00:34:56,460 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 166 selfloop transitions, 88 changer transitions 0/259 dead transitions. [2024-06-28 00:34:56,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 259 transitions, 3528 flow [2024-06-28 00:34:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:34:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:34:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-28 00:34:56,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-28 00:34:56,464 INFO L175 Difference]: Start difference. First operand has 134 places, 193 transitions, 2637 flow. Second operand 9 states and 185 transitions. [2024-06-28 00:34:56,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 259 transitions, 3528 flow [2024-06-28 00:34:56,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 259 transitions, 3407 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-28 00:34:56,559 INFO L231 Difference]: Finished difference. Result has 143 places, 205 transitions, 2937 flow [2024-06-28 00:34:56,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2937, PETRI_PLACES=143, PETRI_TRANSITIONS=205} [2024-06-28 00:34:56,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-28 00:34:56,561 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 205 transitions, 2937 flow [2024-06-28 00:34:56,561 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) [2024-06-28 00:34:56,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:56,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:56,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:34:56,561 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)] === [2024-06-28 00:34:56,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:56,562 INFO L85 PathProgramCache]: Analyzing trace with hash 69971797, now seen corresponding path program 6 times [2024-06-28 00:34:56,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:56,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517179069] [2024-06-28 00:34:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:56,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:34:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:34:58,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:34:58,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517179069] [2024-06-28 00:34:58,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517179069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:34:58,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:34:58,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:34:58,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108035764] [2024-06-28 00:34:58,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:34:58,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:34:58,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:34:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:34:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:34:58,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-28 00:34:58,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 205 transitions, 2937 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) [2024-06-28 00:34:58,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:34:58,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-28 00:34:58,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:34:59,554 INFO L124 PetriNetUnfolderBase]: 1500/2666 cut-off events. [2024-06-28 00:34:59,554 INFO L125 PetriNetUnfolderBase]: For 68008/68042 co-relation queries the response was YES. [2024-06-28 00:34:59,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17280 conditions, 2666 events. 1500/2666 cut-off events. For 68008/68042 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16227 event pairs, 317 based on Foata normal form. 124/2748 useless extension candidates. Maximal degree in co-relation 17216. Up to 1808 conditions per place. [2024-06-28 00:34:59,578 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 123 selfloop transitions, 91 changer transitions 0/246 dead transitions. [2024-06-28 00:34:59,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 246 transitions, 3542 flow [2024-06-28 00:34:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:34:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:34:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 00:34:59,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502906976744186 [2024-06-28 00:34:59,580 INFO L175 Difference]: Start difference. First operand has 143 places, 205 transitions, 2937 flow. Second operand 8 states and 173 transitions. [2024-06-28 00:34:59,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 246 transitions, 3542 flow [2024-06-28 00:34:59,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 246 transitions, 3395 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 00:34:59,675 INFO L231 Difference]: Finished difference. Result has 144 places, 206 transitions, 3048 flow [2024-06-28 00:34:59,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2658, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3048, PETRI_PLACES=144, PETRI_TRANSITIONS=206} [2024-06-28 00:34:59,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-28 00:34:59,675 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 206 transitions, 3048 flow [2024-06-28 00:34:59,676 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) [2024-06-28 00:34:59,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:34:59,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:34:59,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:34:59,677 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:34:59,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:34:59,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1646035496, now seen corresponding path program 1 times [2024-06-28 00:34:59,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:34:59,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927765037] [2024-06-28 00:34:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:34:59,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:34:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:02,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:02,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927765037] [2024-06-28 00:35:02,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927765037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:02,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:02,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:02,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887690134] [2024-06-28 00:35:02,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:02,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:02,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:02,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:02,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 206 transitions, 3048 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) [2024-06-28 00:35:02,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:02,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:02,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:04,085 INFO L124 PetriNetUnfolderBase]: 1882/3081 cut-off events. [2024-06-28 00:35:04,086 INFO L125 PetriNetUnfolderBase]: For 75386/75386 co-relation queries the response was YES. [2024-06-28 00:35:04,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20599 conditions, 3081 events. 1882/3081 cut-off events. For 75386/75386 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17370 event pairs, 725 based on Foata normal form. 2/3083 useless extension candidates. Maximal degree in co-relation 20533. Up to 2894 conditions per place. [2024-06-28 00:35:04,112 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 186 selfloop transitions, 39 changer transitions 0/230 dead transitions. [2024-06-28 00:35:04,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 230 transitions, 3455 flow [2024-06-28 00:35:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:35:04,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-28 00:35:04,128 INFO L175 Difference]: Start difference. First operand has 144 places, 206 transitions, 3048 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:35:04,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 230 transitions, 3455 flow [2024-06-28 00:35:04,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 230 transitions, 3318 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:04,269 INFO L231 Difference]: Finished difference. Result has 147 places, 201 transitions, 2893 flow [2024-06-28 00:35:04,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2893, PETRI_PLACES=147, PETRI_TRANSITIONS=201} [2024-06-28 00:35:04,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-28 00:35:04,270 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 201 transitions, 2893 flow [2024-06-28 00:35:04,270 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) [2024-06-28 00:35:04,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:04,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:04,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:35:04,270 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)] === [2024-06-28 00:35:04,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:04,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2056196721, now seen corresponding path program 7 times [2024-06-28 00:35:04,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:04,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651672219] [2024-06-28 00:35:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:04,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:07,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:07,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:07,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651672219] [2024-06-28 00:35:07,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651672219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:07,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:07,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:35:07,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380595081] [2024-06-28 00:35:07,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:07,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:35:07,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:35:07,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:35:07,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:07,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 201 transitions, 2893 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) [2024-06-28 00:35:07,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:07,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:07,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:09,349 INFO L124 PetriNetUnfolderBase]: 2199/3592 cut-off events. [2024-06-28 00:35:09,349 INFO L125 PetriNetUnfolderBase]: For 82730/82730 co-relation queries the response was YES. [2024-06-28 00:35:09,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23107 conditions, 3592 events. 2199/3592 cut-off events. For 82730/82730 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20822 event pairs, 673 based on Foata normal form. 30/3620 useless extension candidates. Maximal degree in co-relation 23041. Up to 2873 conditions per place. [2024-06-28 00:35:09,375 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 170 selfloop transitions, 93 changer transitions 0/268 dead transitions. [2024-06-28 00:35:09,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 268 transitions, 3905 flow [2024-06-28 00:35:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:35:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:35:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 221 transitions. [2024-06-28 00:35:09,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 00:35:09,377 INFO L175 Difference]: Start difference. First operand has 147 places, 201 transitions, 2893 flow. Second operand 13 states and 221 transitions. [2024-06-28 00:35:09,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 268 transitions, 3905 flow [2024-06-28 00:35:09,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 268 transitions, 3829 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 00:35:09,458 INFO L231 Difference]: Finished difference. Result has 157 places, 221 transitions, 3396 flow [2024-06-28 00:35:09,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3396, PETRI_PLACES=157, PETRI_TRANSITIONS=221} [2024-06-28 00:35:09,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-28 00:35:09,458 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 221 transitions, 3396 flow [2024-06-28 00:35:09,459 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) [2024-06-28 00:35:09,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:09,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:09,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:35:09,459 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)] === [2024-06-28 00:35:09,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2053339761, now seen corresponding path program 8 times [2024-06-28 00:35:09,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:09,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132115072] [2024-06-28 00:35:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:13,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:13,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132115072] [2024-06-28 00:35:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132115072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:13,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:13,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:35:13,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876308899] [2024-06-28 00:35:13,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:13,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:35:13,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:35:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:35:13,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:13,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 221 transitions, 3396 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) [2024-06-28 00:35:13,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:13,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:13,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:15,444 INFO L124 PetriNetUnfolderBase]: 2444/4000 cut-off events. [2024-06-28 00:35:15,444 INFO L125 PetriNetUnfolderBase]: For 106433/106433 co-relation queries the response was YES. [2024-06-28 00:35:15,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26776 conditions, 4000 events. 2444/4000 cut-off events. For 106433/106433 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23716 event pairs, 802 based on Foata normal form. 30/4028 useless extension candidates. Maximal degree in co-relation 26707. Up to 3372 conditions per place. [2024-06-28 00:35:15,477 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 178 selfloop transitions, 92 changer transitions 0/275 dead transitions. [2024-06-28 00:35:15,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 275 transitions, 4283 flow [2024-06-28 00:35:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:35:15,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:35:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-06-28 00:35:15,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38998211091234347 [2024-06-28 00:35:15,479 INFO L175 Difference]: Start difference. First operand has 157 places, 221 transitions, 3396 flow. Second operand 13 states and 218 transitions. [2024-06-28 00:35:15,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 275 transitions, 4283 flow [2024-06-28 00:35:15,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 275 transitions, 4010 flow, removed 75 selfloop flow, removed 9 redundant places. [2024-06-28 00:35:15,621 INFO L231 Difference]: Finished difference. Result has 162 places, 231 transitions, 3537 flow [2024-06-28 00:35:15,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3131, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3537, PETRI_PLACES=162, PETRI_TRANSITIONS=231} [2024-06-28 00:35:15,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-28 00:35:15,622 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 231 transitions, 3537 flow [2024-06-28 00:35:15,622 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) [2024-06-28 00:35:15,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:15,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:15,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:35:15,623 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:15,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1772409457, now seen corresponding path program 9 times [2024-06-28 00:35:15,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:15,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801408498] [2024-06-28 00:35:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:15,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:18,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:18,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801408498] [2024-06-28 00:35:18,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801408498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:18,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:18,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:35:18,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196187126] [2024-06-28 00:35:18,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:18,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:35:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:35:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:35:19,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:19,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 231 transitions, 3537 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) [2024-06-28 00:35:19,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:19,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:19,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:20,691 INFO L124 PetriNetUnfolderBase]: 2497/4080 cut-off events. [2024-06-28 00:35:20,691 INFO L125 PetriNetUnfolderBase]: For 114385/114385 co-relation queries the response was YES. [2024-06-28 00:35:20,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27660 conditions, 4080 events. 2497/4080 cut-off events. For 114385/114385 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 24219 event pairs, 861 based on Foata normal form. 6/4084 useless extension candidates. Maximal degree in co-relation 27589. Up to 3713 conditions per place. [2024-06-28 00:35:20,720 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 177 selfloop transitions, 86 changer transitions 0/268 dead transitions. [2024-06-28 00:35:20,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 268 transitions, 4323 flow [2024-06-28 00:35:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:35:20,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-28 00:35:20,722 INFO L175 Difference]: Start difference. First operand has 162 places, 231 transitions, 3537 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:35:20,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 268 transitions, 4323 flow [2024-06-28 00:35:20,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 268 transitions, 4135 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-28 00:35:20,856 INFO L231 Difference]: Finished difference. Result has 162 places, 237 transitions, 3665 flow [2024-06-28 00:35:20,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3665, PETRI_PLACES=162, PETRI_TRANSITIONS=237} [2024-06-28 00:35:20,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-28 00:35:20,857 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 237 transitions, 3665 flow [2024-06-28 00:35:20,857 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) [2024-06-28 00:35:20,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:20,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:20,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:35:20,858 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)] === [2024-06-28 00:35:20,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash 32875289, now seen corresponding path program 10 times [2024-06-28 00:35:20,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:20,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55382307] [2024-06-28 00:35:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:20,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:24,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:24,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55382307] [2024-06-28 00:35:24,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55382307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:24,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:24,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:35:24,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774368144] [2024-06-28 00:35:24,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:24,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:35:24,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:35:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:35:24,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:24,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 237 transitions, 3665 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) [2024-06-28 00:35:24,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:24,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:24,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:26,290 INFO L124 PetriNetUnfolderBase]: 2505/4091 cut-off events. [2024-06-28 00:35:26,295 INFO L125 PetriNetUnfolderBase]: For 120451/120451 co-relation queries the response was YES. [2024-06-28 00:35:26,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27989 conditions, 4091 events. 2505/4091 cut-off events. For 120451/120451 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 24311 event pairs, 873 based on Foata normal form. 7/4095 useless extension candidates. Maximal degree in co-relation 27916. Up to 3628 conditions per place. [2024-06-28 00:35:26,329 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 165 selfloop transitions, 105 changer transitions 0/275 dead transitions. [2024-06-28 00:35:26,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 275 transitions, 4601 flow [2024-06-28 00:35:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:35:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:35:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-28 00:35:26,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-28 00:35:26,332 INFO L175 Difference]: Start difference. First operand has 162 places, 237 transitions, 3665 flow. Second operand 10 states and 171 transitions. [2024-06-28 00:35:26,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 275 transitions, 4601 flow [2024-06-28 00:35:26,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 275 transitions, 4341 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:26,467 INFO L231 Difference]: Finished difference. Result has 167 places, 243 transitions, 3838 flow [2024-06-28 00:35:26,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3405, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3838, PETRI_PLACES=167, PETRI_TRANSITIONS=243} [2024-06-28 00:35:26,468 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-28 00:35:26,468 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 243 transitions, 3838 flow [2024-06-28 00:35:26,468 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) [2024-06-28 00:35:26,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:26,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:26,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:35:26,469 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:26,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash -278375444, now seen corresponding path program 2 times [2024-06-28 00:35:26,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:26,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049476693] [2024-06-28 00:35:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:26,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:29,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:29,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049476693] [2024-06-28 00:35:29,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049476693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:29,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:29,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:29,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975391591] [2024-06-28 00:35:29,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:29,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:29,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:29,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:29,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:29,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 243 transitions, 3838 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) [2024-06-28 00:35:29,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:29,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:29,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:30,788 INFO L124 PetriNetUnfolderBase]: 2502/4092 cut-off events. [2024-06-28 00:35:30,788 INFO L125 PetriNetUnfolderBase]: For 125575/125575 co-relation queries the response was YES. [2024-06-28 00:35:30,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28276 conditions, 4092 events. 2502/4092 cut-off events. For 125575/125575 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 24386 event pairs, 874 based on Foata normal form. 1/4091 useless extension candidates. Maximal degree in co-relation 28201. Up to 3862 conditions per place. [2024-06-28 00:35:30,817 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 194 selfloop transitions, 61 changer transitions 0/260 dead transitions. [2024-06-28 00:35:30,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 260 transitions, 4337 flow [2024-06-28 00:35:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:35:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:35:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-28 00:35:30,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-28 00:35:30,818 INFO L175 Difference]: Start difference. First operand has 167 places, 243 transitions, 3838 flow. Second operand 6 states and 119 transitions. [2024-06-28 00:35:30,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 260 transitions, 4337 flow [2024-06-28 00:35:30,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 260 transitions, 4022 flow, removed 94 selfloop flow, removed 6 redundant places. [2024-06-28 00:35:30,944 INFO L231 Difference]: Finished difference. Result has 167 places, 240 transitions, 3608 flow [2024-06-28 00:35:30,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3608, PETRI_PLACES=167, PETRI_TRANSITIONS=240} [2024-06-28 00:35:30,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-28 00:35:30,945 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 240 transitions, 3608 flow [2024-06-28 00:35:30,945 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) [2024-06-28 00:35:30,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:30,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:30,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:35:30,946 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:30,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:30,946 INFO L85 PathProgramCache]: Analyzing trace with hash 828246090, now seen corresponding path program 3 times [2024-06-28 00:35:30,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:30,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109289072] [2024-06-28 00:35:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:30,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:34,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109289072] [2024-06-28 00:35:34,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109289072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:34,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:34,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:34,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711688309] [2024-06-28 00:35:34,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:34,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:34,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:34,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:34,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:34,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:34,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 240 transitions, 3608 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) [2024-06-28 00:35:34,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:34,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:34,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:35,942 INFO L124 PetriNetUnfolderBase]: 2472/4051 cut-off events. [2024-06-28 00:35:35,942 INFO L125 PetriNetUnfolderBase]: For 120152/120152 co-relation queries the response was YES. [2024-06-28 00:35:35,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27534 conditions, 4051 events. 2472/4051 cut-off events. For 120152/120152 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24227 event pairs, 933 based on Foata normal form. 1/4051 useless extension candidates. Maximal degree in co-relation 27456. Up to 3824 conditions per place. [2024-06-28 00:35:35,978 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 191 selfloop transitions, 58 changer transitions 0/254 dead transitions. [2024-06-28 00:35:35,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 254 transitions, 4124 flow [2024-06-28 00:35:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 00:35:35,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 00:35:35,980 INFO L175 Difference]: Start difference. First operand has 167 places, 240 transitions, 3608 flow. Second operand 8 states and 129 transitions. [2024-06-28 00:35:35,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 254 transitions, 4124 flow [2024-06-28 00:35:36,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 254 transitions, 3966 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 00:35:36,129 INFO L231 Difference]: Finished difference. Result has 166 places, 238 transitions, 3540 flow [2024-06-28 00:35:36,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3540, PETRI_PLACES=166, PETRI_TRANSITIONS=238} [2024-06-28 00:35:36,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-28 00:35:36,130 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 238 transitions, 3540 flow [2024-06-28 00:35:36,130 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) [2024-06-28 00:35:36,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:36,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:36,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:35:36,130 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:36,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 612241102, now seen corresponding path program 1 times [2024-06-28 00:35:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:36,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124811241] [2024-06-28 00:35:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:39,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:39,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124811241] [2024-06-28 00:35:39,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124811241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:39,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:39,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:39,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122462851] [2024-06-28 00:35:39,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:39,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:39,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:39,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:39,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 238 transitions, 3540 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) [2024-06-28 00:35:39,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:39,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:39,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:41,216 INFO L124 PetriNetUnfolderBase]: 2877/4756 cut-off events. [2024-06-28 00:35:41,217 INFO L125 PetriNetUnfolderBase]: For 150336/150336 co-relation queries the response was YES. [2024-06-28 00:35:41,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29880 conditions, 4756 events. 2877/4756 cut-off events. For 150336/150336 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 29249 event pairs, 1451 based on Foata normal form. 81/4837 useless extension candidates. Maximal degree in co-relation 29805. Up to 3914 conditions per place. [2024-06-28 00:35:41,257 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 252 selfloop transitions, 22 changer transitions 2/281 dead transitions. [2024-06-28 00:35:41,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 281 transitions, 4426 flow [2024-06-28 00:35:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:35:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:35:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 00:35:41,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-28 00:35:41,259 INFO L175 Difference]: Start difference. First operand has 166 places, 238 transitions, 3540 flow. Second operand 9 states and 152 transitions. [2024-06-28 00:35:41,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 281 transitions, 4426 flow [2024-06-28 00:35:41,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 281 transitions, 4347 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-28 00:35:41,404 INFO L231 Difference]: Finished difference. Result has 174 places, 248 transitions, 3726 flow [2024-06-28 00:35:41,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3726, PETRI_PLACES=174, PETRI_TRANSITIONS=248} [2024-06-28 00:35:41,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-28 00:35:41,405 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 248 transitions, 3726 flow [2024-06-28 00:35:41,405 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) [2024-06-28 00:35:41,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:41,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:41,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:35:41,405 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:41,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash 828253034, now seen corresponding path program 2 times [2024-06-28 00:35:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:41,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113270534] [2024-06-28 00:35:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:41,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:43,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:43,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113270534] [2024-06-28 00:35:43,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113270534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:43,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:43,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:43,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949358958] [2024-06-28 00:35:43,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:43,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:35:43,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:43,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:35:43,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:35:43,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:35:43,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 248 transitions, 3726 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) [2024-06-28 00:35:43,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:43,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:35:43,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:45,353 INFO L124 PetriNetUnfolderBase]: 2989/4931 cut-off events. [2024-06-28 00:35:45,353 INFO L125 PetriNetUnfolderBase]: For 183022/183098 co-relation queries the response was YES. [2024-06-28 00:35:45,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31300 conditions, 4931 events. 2989/4931 cut-off events. For 183022/183098 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30863 event pairs, 1665 based on Foata normal form. 85/4966 useless extension candidates. Maximal degree in co-relation 31220. Up to 3610 conditions per place. [2024-06-28 00:35:45,400 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 174 selfloop transitions, 17 changer transitions 14/273 dead transitions. [2024-06-28 00:35:45,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 273 transitions, 4306 flow [2024-06-28 00:35:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 00:35:45,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-28 00:35:45,402 INFO L175 Difference]: Start difference. First operand has 174 places, 248 transitions, 3726 flow. Second operand 8 states and 134 transitions. [2024-06-28 00:35:45,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 273 transitions, 4306 flow [2024-06-28 00:35:45,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 273 transitions, 4095 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-28 00:35:45,591 INFO L231 Difference]: Finished difference. Result has 180 places, 248 transitions, 3570 flow [2024-06-28 00:35:45,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3570, PETRI_PLACES=180, PETRI_TRANSITIONS=248} [2024-06-28 00:35:45,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-28 00:35:45,594 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 248 transitions, 3570 flow [2024-06-28 00:35:45,594 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) [2024-06-28 00:35:45,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:45,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:45,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:35:45,594 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:45,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:45,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1884998786, now seen corresponding path program 1 times [2024-06-28 00:35:45,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:45,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22763822] [2024-06-28 00:35:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:45,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:49,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:49,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22763822] [2024-06-28 00:35:49,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22763822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:49,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:49,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:35:49,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916419270] [2024-06-28 00:35:49,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:49,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:35:49,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:49,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:35:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:35:49,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:49,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 248 transitions, 3570 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) [2024-06-28 00:35:49,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:49,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:49,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:51,329 INFO L124 PetriNetUnfolderBase]: 2531/4131 cut-off events. [2024-06-28 00:35:51,330 INFO L125 PetriNetUnfolderBase]: For 147839/147839 co-relation queries the response was YES. [2024-06-28 00:35:51,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29232 conditions, 4131 events. 2531/4131 cut-off events. For 147839/147839 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24618 event pairs, 841 based on Foata normal form. 4/4133 useless extension candidates. Maximal degree in co-relation 29150. Up to 3811 conditions per place. [2024-06-28 00:35:51,370 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 208 selfloop transitions, 83 changer transitions 0/296 dead transitions. [2024-06-28 00:35:51,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 296 transitions, 4618 flow [2024-06-28 00:35:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:35:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:35:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 219 transitions. [2024-06-28 00:35:51,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3637873754152824 [2024-06-28 00:35:51,373 INFO L175 Difference]: Start difference. First operand has 180 places, 248 transitions, 3570 flow. Second operand 14 states and 219 transitions. [2024-06-28 00:35:51,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 296 transitions, 4618 flow [2024-06-28 00:35:51,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 296 transitions, 4541 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-28 00:35:51,576 INFO L231 Difference]: Finished difference. Result has 184 places, 260 transitions, 3852 flow [2024-06-28 00:35:51,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3852, PETRI_PLACES=184, PETRI_TRANSITIONS=260} [2024-06-28 00:35:51,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-28 00:35:51,577 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 260 transitions, 3852 flow [2024-06-28 00:35:51,577 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) [2024-06-28 00:35:51,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:51,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:51,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:35:51,577 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)] === [2024-06-28 00:35:51,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:51,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1705173867, now seen corresponding path program 1 times [2024-06-28 00:35:51,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:51,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388448432] [2024-06-28 00:35:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:51,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:51,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:51,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388448432] [2024-06-28 00:35:51,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388448432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:51,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:51,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:35:51,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730066391] [2024-06-28 00:35:51,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:51,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:35:51,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:35:51,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:35:51,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-28 00:35:51,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 260 transitions, 3852 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:51,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:51,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-28 00:35:51,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:52,528 INFO L124 PetriNetUnfolderBase]: 1383/2584 cut-off events. [2024-06-28 00:35:52,528 INFO L125 PetriNetUnfolderBase]: For 127422/127556 co-relation queries the response was YES. [2024-06-28 00:35:52,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20164 conditions, 2584 events. 1383/2584 cut-off events. For 127422/127556 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17056 event pairs, 414 based on Foata normal form. 284/2775 useless extension candidates. Maximal degree in co-relation 20084. Up to 1100 conditions per place. [2024-06-28 00:35:52,556 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 63 selfloop transitions, 80 changer transitions 0/255 dead transitions. [2024-06-28 00:35:52,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 255 transitions, 4020 flow [2024-06-28 00:35:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:35:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:35:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-28 00:35:52,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2024-06-28 00:35:52,557 INFO L175 Difference]: Start difference. First operand has 184 places, 260 transitions, 3852 flow. Second operand 4 states and 90 transitions. [2024-06-28 00:35:52,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 255 transitions, 4020 flow [2024-06-28 00:35:52,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 255 transitions, 3856 flow, removed 33 selfloop flow, removed 12 redundant places. [2024-06-28 00:35:52,689 INFO L231 Difference]: Finished difference. Result has 171 places, 246 transitions, 3721 flow [2024-06-28 00:35:52,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3721, PETRI_PLACES=171, PETRI_TRANSITIONS=246} [2024-06-28 00:35:52,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-28 00:35:52,690 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 246 transitions, 3721 flow [2024-06-28 00:35:52,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:35:52,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:52,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:52,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:35:52,691 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:52,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:52,691 INFO L85 PathProgramCache]: Analyzing trace with hash -466348516, now seen corresponding path program 2 times [2024-06-28 00:35:52,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:52,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007308630] [2024-06-28 00:35:52,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:52,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:35:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:35:56,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:35:56,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007308630] [2024-06-28 00:35:56,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007308630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:35:56,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:35:56,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:35:56,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970478005] [2024-06-28 00:35:56,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:35:56,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:35:56,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:35:56,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:35:56,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:35:56,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:35:56,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 246 transitions, 3721 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) [2024-06-28 00:35:56,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:35:56,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:35:56,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:35:58,171 INFO L124 PetriNetUnfolderBase]: 1950/3266 cut-off events. [2024-06-28 00:35:58,171 INFO L125 PetriNetUnfolderBase]: For 109662/109662 co-relation queries the response was YES. [2024-06-28 00:35:58,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25128 conditions, 3266 events. 1950/3266 cut-off events. For 109662/109662 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19490 event pairs, 709 based on Foata normal form. 4/3270 useless extension candidates. Maximal degree in co-relation 25051. Up to 3038 conditions per place. [2024-06-28 00:35:58,199 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 235 selfloop transitions, 44 changer transitions 0/284 dead transitions. [2024-06-28 00:35:58,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 284 transitions, 4448 flow [2024-06-28 00:35:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:35:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:35:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 00:35:58,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-28 00:35:58,200 INFO L175 Difference]: Start difference. First operand has 171 places, 246 transitions, 3721 flow. Second operand 8 states and 147 transitions. [2024-06-28 00:35:58,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 284 transitions, 4448 flow [2024-06-28 00:35:58,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 284 transitions, 4445 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-28 00:35:58,327 INFO L231 Difference]: Finished difference. Result has 178 places, 252 transitions, 3892 flow [2024-06-28 00:35:58,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3718, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3892, PETRI_PLACES=178, PETRI_TRANSITIONS=252} [2024-06-28 00:35:58,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-28 00:35:58,328 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 252 transitions, 3892 flow [2024-06-28 00:35:58,328 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) [2024-06-28 00:35:58,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:35:58,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:35:58,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:35:58,328 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:35:58,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:35:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1501213826, now seen corresponding path program 3 times [2024-06-28 00:35:58,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:35:58,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140911518] [2024-06-28 00:35:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:35:58,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:35:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:02,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:02,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140911518] [2024-06-28 00:36:02,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140911518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:02,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:02,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:02,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175996896] [2024-06-28 00:36:02,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:02,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:02,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:02,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:02,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 252 transitions, 3892 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) [2024-06-28 00:36:02,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:02,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:02,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:04,278 INFO L124 PetriNetUnfolderBase]: 1980/3315 cut-off events. [2024-06-28 00:36:04,279 INFO L125 PetriNetUnfolderBase]: For 115883/115883 co-relation queries the response was YES. [2024-06-28 00:36:04,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25765 conditions, 3315 events. 1980/3315 cut-off events. For 115883/115883 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19870 event pairs, 705 based on Foata normal form. 4/3318 useless extension candidates. Maximal degree in co-relation 25686. Up to 2974 conditions per place. [2024-06-28 00:36:04,311 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 195 selfloop transitions, 85 changer transitions 0/285 dead transitions. [2024-06-28 00:36:04,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 285 transitions, 4699 flow [2024-06-28 00:36:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:36:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:36:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-28 00:36:04,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-28 00:36:04,313 INFO L175 Difference]: Start difference. First operand has 178 places, 252 transitions, 3892 flow. Second operand 11 states and 172 transitions. [2024-06-28 00:36:04,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 285 transitions, 4699 flow [2024-06-28 00:36:04,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 285 transitions, 4619 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:04,465 INFO L231 Difference]: Finished difference. Result has 184 places, 260 transitions, 4086 flow [2024-06-28 00:36:04,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4086, PETRI_PLACES=184, PETRI_TRANSITIONS=260} [2024-06-28 00:36:04,465 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-28 00:36:04,465 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 260 transitions, 4086 flow [2024-06-28 00:36:04,465 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) [2024-06-28 00:36:04,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:04,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:04,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:36:04,466 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:04,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1500768356, now seen corresponding path program 4 times [2024-06-28 00:36:04,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:04,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580332495] [2024-06-28 00:36:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:04,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:08,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:08,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580332495] [2024-06-28 00:36:08,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580332495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:08,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:08,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:08,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661389399] [2024-06-28 00:36:08,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:08,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:08,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:08,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:08,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 260 transitions, 4086 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) [2024-06-28 00:36:08,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:08,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:08,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:10,648 INFO L124 PetriNetUnfolderBase]: 1968/3299 cut-off events. [2024-06-28 00:36:10,649 INFO L125 PetriNetUnfolderBase]: For 121545/121545 co-relation queries the response was YES. [2024-06-28 00:36:10,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25852 conditions, 3299 events. 1968/3299 cut-off events. For 121545/121545 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19892 event pairs, 990 based on Foata normal form. 4/3303 useless extension candidates. Maximal degree in co-relation 25771. Up to 3140 conditions per place. [2024-06-28 00:36:10,677 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 243 selfloop transitions, 24 changer transitions 0/272 dead transitions. [2024-06-28 00:36:10,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 272 transitions, 4667 flow [2024-06-28 00:36:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 00:36:10,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-28 00:36:10,678 INFO L175 Difference]: Start difference. First operand has 184 places, 260 transitions, 4086 flow. Second operand 7 states and 110 transitions. [2024-06-28 00:36:10,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 272 transitions, 4667 flow [2024-06-28 00:36:10,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 272 transitions, 4449 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:10,836 INFO L231 Difference]: Finished difference. Result has 185 places, 260 transitions, 3939 flow [2024-06-28 00:36:10,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3876, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3939, PETRI_PLACES=185, PETRI_TRANSITIONS=260} [2024-06-28 00:36:10,837 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-28 00:36:10,837 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 260 transitions, 3939 flow [2024-06-28 00:36:10,837 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) [2024-06-28 00:36:10,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:10,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:10,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:36:10,838 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:10,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1678130268, now seen corresponding path program 1 times [2024-06-28 00:36:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:10,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586422677] [2024-06-28 00:36:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:10,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:13,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:13,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586422677] [2024-06-28 00:36:13,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586422677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:13,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:13,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:13,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452108920] [2024-06-28 00:36:13,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:13,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:13,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:13,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:13,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:13,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:13,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 260 transitions, 3939 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:13,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:13,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:13,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:14,999 INFO L124 PetriNetUnfolderBase]: 2012/3367 cut-off events. [2024-06-28 00:36:14,999 INFO L125 PetriNetUnfolderBase]: For 127788/127788 co-relation queries the response was YES. [2024-06-28 00:36:15,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26179 conditions, 3367 events. 2012/3367 cut-off events. For 127788/127788 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20421 event pairs, 980 based on Foata normal form. 3/3370 useless extension candidates. Maximal degree in co-relation 26097. Up to 3178 conditions per place. [2024-06-28 00:36:15,034 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 264 selfloop transitions, 25 changer transitions 0/294 dead transitions. [2024-06-28 00:36:15,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 294 transitions, 4811 flow [2024-06-28 00:36:15,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 00:36:15,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-28 00:36:15,036 INFO L175 Difference]: Start difference. First operand has 185 places, 260 transitions, 3939 flow. Second operand 8 states and 133 transitions. [2024-06-28 00:36:15,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 294 transitions, 4811 flow [2024-06-28 00:36:15,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 294 transitions, 4759 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:15,206 INFO L231 Difference]: Finished difference. Result has 188 places, 271 transitions, 4107 flow [2024-06-28 00:36:15,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3887, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4107, PETRI_PLACES=188, PETRI_TRANSITIONS=271} [2024-06-28 00:36:15,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-28 00:36:15,207 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 271 transitions, 4107 flow [2024-06-28 00:36:15,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:15,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:15,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:15,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:36:15,208 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:15,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1678130082, now seen corresponding path program 1 times [2024-06-28 00:36:15,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:15,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920900534] [2024-06-28 00:36:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:15,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:19,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:19,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920900534] [2024-06-28 00:36:19,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920900534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:19,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:19,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:19,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73074662] [2024-06-28 00:36:19,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:19,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:19,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:19,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:19,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 271 transitions, 4107 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) [2024-06-28 00:36:19,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:19,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:19,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:20,570 INFO L124 PetriNetUnfolderBase]: 2006/3359 cut-off events. [2024-06-28 00:36:20,571 INFO L125 PetriNetUnfolderBase]: For 129207/129207 co-relation queries the response was YES. [2024-06-28 00:36:20,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26855 conditions, 3359 events. 2006/3359 cut-off events. For 129207/129207 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20232 event pairs, 973 based on Foata normal form. 2/3361 useless extension candidates. Maximal degree in co-relation 26771. Up to 3184 conditions per place. [2024-06-28 00:36:20,600 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 262 selfloop transitions, 24 changer transitions 0/291 dead transitions. [2024-06-28 00:36:20,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 291 transitions, 4817 flow [2024-06-28 00:36:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 00:36:20,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-28 00:36:20,601 INFO L175 Difference]: Start difference. First operand has 188 places, 271 transitions, 4107 flow. Second operand 7 states and 118 transitions. [2024-06-28 00:36:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 291 transitions, 4817 flow [2024-06-28 00:36:20,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 291 transitions, 4753 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 00:36:20,778 INFO L231 Difference]: Finished difference. Result has 191 places, 274 transitions, 4184 flow [2024-06-28 00:36:20,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4043, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4184, PETRI_PLACES=191, PETRI_TRANSITIONS=274} [2024-06-28 00:36:20,778 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-28 00:36:20,778 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 274 transitions, 4184 flow [2024-06-28 00:36:20,779 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) [2024-06-28 00:36:20,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:20,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:36:20,779 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:20,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -93711814, now seen corresponding path program 1 times [2024-06-28 00:36:20,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:20,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602649416] [2024-06-28 00:36:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:26,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:26,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602649416] [2024-06-28 00:36:26,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602649416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:26,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:26,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:36:26,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727284065] [2024-06-28 00:36:26,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:26,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:36:26,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:36:26,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:36:26,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:26,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 274 transitions, 4184 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:36:26,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:26,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:26,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:27,670 INFO L124 PetriNetUnfolderBase]: 2001/3352 cut-off events. [2024-06-28 00:36:27,670 INFO L125 PetriNetUnfolderBase]: For 135623/135623 co-relation queries the response was YES. [2024-06-28 00:36:27,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27134 conditions, 3352 events. 2001/3352 cut-off events. For 135623/135623 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20064 event pairs, 973 based on Foata normal form. 2/3354 useless extension candidates. Maximal degree in co-relation 27048. Up to 3203 conditions per place. [2024-06-28 00:36:27,706 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 266 selfloop transitions, 16 changer transitions 0/287 dead transitions. [2024-06-28 00:36:27,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 287 transitions, 4817 flow [2024-06-28 00:36:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:27,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 00:36:27,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554817275747508 [2024-06-28 00:36:27,708 INFO L175 Difference]: Start difference. First operand has 191 places, 274 transitions, 4184 flow. Second operand 7 states and 107 transitions. [2024-06-28 00:36:27,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 287 transitions, 4817 flow [2024-06-28 00:36:27,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 287 transitions, 4701 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:27,898 INFO L231 Difference]: Finished difference. Result has 193 places, 276 transitions, 4148 flow [2024-06-28 00:36:27,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4148, PETRI_PLACES=193, PETRI_TRANSITIONS=276} [2024-06-28 00:36:27,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-28 00:36:27,899 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 276 transitions, 4148 flow [2024-06-28 00:36:27,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:36:27,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:27,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:27,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:36:27,900 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:27,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -660743221, now seen corresponding path program 1 times [2024-06-28 00:36:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:27,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614959187] [2024-06-28 00:36:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:27,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:32,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:32,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614959187] [2024-06-28 00:36:32,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614959187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:32,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:32,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:32,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435016293] [2024-06-28 00:36:32,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:32,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:32,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:32,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:32,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:32,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:32,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 276 transitions, 4148 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) [2024-06-28 00:36:32,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:32,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:32,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:33,450 INFO L124 PetriNetUnfolderBase]: 2026/3383 cut-off events. [2024-06-28 00:36:33,451 INFO L125 PetriNetUnfolderBase]: For 138689/138689 co-relation queries the response was YES. [2024-06-28 00:36:33,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27700 conditions, 3383 events. 2026/3383 cut-off events. For 138689/138689 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20117 event pairs, 609 based on Foata normal form. 2/3385 useless extension candidates. Maximal degree in co-relation 27613. Up to 3035 conditions per place. [2024-06-28 00:36:33,489 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 222 selfloop transitions, 91 changer transitions 0/318 dead transitions. [2024-06-28 00:36:33,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 318 transitions, 5095 flow [2024-06-28 00:36:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:36:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:36:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 00:36:33,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-28 00:36:33,491 INFO L175 Difference]: Start difference. First operand has 193 places, 276 transitions, 4148 flow. Second operand 9 states and 159 transitions. [2024-06-28 00:36:33,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 318 transitions, 5095 flow [2024-06-28 00:36:33,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 318 transitions, 5034 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:33,706 INFO L231 Difference]: Finished difference. Result has 198 places, 287 transitions, 4554 flow [2024-06-28 00:36:33,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4087, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4554, PETRI_PLACES=198, PETRI_TRANSITIONS=287} [2024-06-28 00:36:33,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-28 00:36:33,707 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 287 transitions, 4554 flow [2024-06-28 00:36:33,707 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) [2024-06-28 00:36:33,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:33,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:33,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:36:33,707 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:33,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1132241351, now seen corresponding path program 2 times [2024-06-28 00:36:33,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:33,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690014542] [2024-06-28 00:36:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:33,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:36,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:36,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690014542] [2024-06-28 00:36:36,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690014542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:36,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:36,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:36,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691132481] [2024-06-28 00:36:36,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:36,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:36,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:36,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:36,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:36,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:36,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 287 transitions, 4554 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) [2024-06-28 00:36:36,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:36,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:36,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:38,084 INFO L124 PetriNetUnfolderBase]: 2036/3397 cut-off events. [2024-06-28 00:36:38,084 INFO L125 PetriNetUnfolderBase]: For 150466/150466 co-relation queries the response was YES. [2024-06-28 00:36:38,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28780 conditions, 3397 events. 2036/3397 cut-off events. For 150466/150466 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20163 event pairs, 580 based on Foata normal form. 2/3399 useless extension candidates. Maximal degree in co-relation 28691. Up to 3033 conditions per place. [2024-06-28 00:36:38,116 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 220 selfloop transitions, 94 changer transitions 0/319 dead transitions. [2024-06-28 00:36:38,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 319 transitions, 5406 flow [2024-06-28 00:36:38,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 00:36:38,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-28 00:36:38,117 INFO L175 Difference]: Start difference. First operand has 198 places, 287 transitions, 4554 flow. Second operand 8 states and 145 transitions. [2024-06-28 00:36:38,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 319 transitions, 5406 flow [2024-06-28 00:36:38,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 319 transitions, 5101 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:38,311 INFO L231 Difference]: Finished difference. Result has 200 places, 291 transitions, 4600 flow [2024-06-28 00:36:38,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4249, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4600, PETRI_PLACES=200, PETRI_TRANSITIONS=291} [2024-06-28 00:36:38,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-28 00:36:38,312 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 291 transitions, 4600 flow [2024-06-28 00:36:38,312 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) [2024-06-28 00:36:38,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:38,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:38,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:36:38,313 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:38,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1940455851, now seen corresponding path program 3 times [2024-06-28 00:36:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:38,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364894324] [2024-06-28 00:36:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:41,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:41,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364894324] [2024-06-28 00:36:41,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364894324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:41,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:41,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:41,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115732013] [2024-06-28 00:36:41,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:41,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:41,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:41,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:41,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:41,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:41,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 291 transitions, 4600 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:41,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:41,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:41,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:42,952 INFO L124 PetriNetUnfolderBase]: 2056/3423 cut-off events. [2024-06-28 00:36:42,952 INFO L125 PetriNetUnfolderBase]: For 160612/160612 co-relation queries the response was YES. [2024-06-28 00:36:42,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29656 conditions, 3423 events. 2056/3423 cut-off events. For 160612/160612 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20309 event pairs, 580 based on Foata normal form. 2/3423 useless extension candidates. Maximal degree in co-relation 29566. Up to 3099 conditions per place. [2024-06-28 00:36:42,991 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 235 selfloop transitions, 80 changer transitions 0/320 dead transitions. [2024-06-28 00:36:42,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 320 transitions, 5652 flow [2024-06-28 00:36:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 00:36:42,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:36:42,993 INFO L175 Difference]: Start difference. First operand has 200 places, 291 transitions, 4600 flow. Second operand 7 states and 129 transitions. [2024-06-28 00:36:42,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 320 transitions, 5652 flow [2024-06-28 00:36:43,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 320 transitions, 5226 flow, removed 126 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:43,246 INFO L231 Difference]: Finished difference. Result has 201 places, 299 transitions, 4657 flow [2024-06-28 00:36:43,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4304, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4657, PETRI_PLACES=201, PETRI_TRANSITIONS=299} [2024-06-28 00:36:43,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-28 00:36:43,247 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 299 transitions, 4657 flow [2024-06-28 00:36:43,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:43,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:43,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:43,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:36:43,247 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:43,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1694573703, now seen corresponding path program 4 times [2024-06-28 00:36:43,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:43,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944433157] [2024-06-28 00:36:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:43,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:47,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:47,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944433157] [2024-06-28 00:36:47,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944433157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:47,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:47,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:47,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129269832] [2024-06-28 00:36:47,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:47,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:47,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:47,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:47,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:47,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:47,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 299 transitions, 4657 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:47,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:47,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:47,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:48,663 INFO L124 PetriNetUnfolderBase]: 2059/3433 cut-off events. [2024-06-28 00:36:48,663 INFO L125 PetriNetUnfolderBase]: For 159561/159561 co-relation queries the response was YES. [2024-06-28 00:36:48,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29299 conditions, 3433 events. 2059/3433 cut-off events. For 159561/159561 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20431 event pairs, 591 based on Foata normal form. 1/3432 useless extension candidates. Maximal degree in co-relation 29208. Up to 3139 conditions per place. [2024-06-28 00:36:48,701 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 248 selfloop transitions, 73 changer transitions 0/326 dead transitions. [2024-06-28 00:36:48,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 326 transitions, 5409 flow [2024-06-28 00:36:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 00:36:48,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-28 00:36:48,702 INFO L175 Difference]: Start difference. First operand has 201 places, 299 transitions, 4657 flow. Second operand 8 states and 142 transitions. [2024-06-28 00:36:48,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 326 transitions, 5409 flow [2024-06-28 00:36:48,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 326 transitions, 5134 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:48,967 INFO L231 Difference]: Finished difference. Result has 204 places, 301 transitions, 4590 flow [2024-06-28 00:36:48,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4386, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4590, PETRI_PLACES=204, PETRI_TRANSITIONS=301} [2024-06-28 00:36:48,967 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-28 00:36:48,968 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 301 transitions, 4590 flow [2024-06-28 00:36:48,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:48,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:48,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:48,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:36:48,968 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:48,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:48,969 INFO L85 PathProgramCache]: Analyzing trace with hash -494818169, now seen corresponding path program 5 times [2024-06-28 00:36:48,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:48,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233590527] [2024-06-28 00:36:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:48,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:52,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:52,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233590527] [2024-06-28 00:36:52,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233590527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:52,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:52,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:36:52,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723424244] [2024-06-28 00:36:52,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:52,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:36:52,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:36:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:36:52,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:52,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 301 transitions, 4590 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:52,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:52,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:52,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:53,754 INFO L124 PetriNetUnfolderBase]: 2064/3435 cut-off events. [2024-06-28 00:36:53,755 INFO L125 PetriNetUnfolderBase]: For 166513/166513 co-relation queries the response was YES. [2024-06-28 00:36:53,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29421 conditions, 3435 events. 2064/3435 cut-off events. For 166513/166513 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20440 event pairs, 594 based on Foata normal form. 1/3433 useless extension candidates. Maximal degree in co-relation 29329. Up to 3031 conditions per place. [2024-06-28 00:36:53,791 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 218 selfloop transitions, 102 changer transitions 0/325 dead transitions. [2024-06-28 00:36:53,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 325 transitions, 5559 flow [2024-06-28 00:36:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:36:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:36:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 00:36:53,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 00:36:53,796 INFO L175 Difference]: Start difference. First operand has 204 places, 301 transitions, 4590 flow. Second operand 7 states and 126 transitions. [2024-06-28 00:36:53,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 325 transitions, 5559 flow [2024-06-28 00:36:54,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 325 transitions, 5421 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 00:36:54,143 INFO L231 Difference]: Finished difference. Result has 205 places, 304 transitions, 4789 flow [2024-06-28 00:36:54,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4789, PETRI_PLACES=205, PETRI_TRANSITIONS=304} [2024-06-28 00:36:54,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-28 00:36:54,144 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 304 transitions, 4789 flow [2024-06-28 00:36:54,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:36:54,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:54,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:54,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:36:54,145 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:54,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:54,146 INFO L85 PathProgramCache]: Analyzing trace with hash -46776819, now seen corresponding path program 6 times [2024-06-28 00:36:54,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:54,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096218904] [2024-06-28 00:36:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:54,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:36:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:36:58,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:36:58,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096218904] [2024-06-28 00:36:58,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096218904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:36:58,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:36:58,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:36:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805052367] [2024-06-28 00:36:58,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:36:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:36:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:36:58,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:36:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:36:58,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:36:58,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 304 transitions, 4789 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) [2024-06-28 00:36:58,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:36:58,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:36:58,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:36:59,286 INFO L124 PetriNetUnfolderBase]: 2061/3431 cut-off events. [2024-06-28 00:36:59,286 INFO L125 PetriNetUnfolderBase]: For 170540/170540 co-relation queries the response was YES. [2024-06-28 00:36:59,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29859 conditions, 3431 events. 2061/3431 cut-off events. For 170540/170540 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20458 event pairs, 594 based on Foata normal form. 1/3429 useless extension candidates. Maximal degree in co-relation 29766. Up to 2989 conditions per place. [2024-06-28 00:36:59,324 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 196 selfloop transitions, 122 changer transitions 0/323 dead transitions. [2024-06-28 00:36:59,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 323 transitions, 5674 flow [2024-06-28 00:36:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:36:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:36:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 00:36:59,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-28 00:36:59,326 INFO L175 Difference]: Start difference. First operand has 205 places, 304 transitions, 4789 flow. Second operand 8 states and 131 transitions. [2024-06-28 00:36:59,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 323 transitions, 5674 flow [2024-06-28 00:36:59,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 323 transitions, 5361 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-28 00:36:59,584 INFO L231 Difference]: Finished difference. Result has 208 places, 307 transitions, 4859 flow [2024-06-28 00:36:59,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4476, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4859, PETRI_PLACES=208, PETRI_TRANSITIONS=307} [2024-06-28 00:36:59,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-28 00:36:59,585 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 307 transitions, 4859 flow [2024-06-28 00:36:59,585 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) [2024-06-28 00:36:59,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:36:59,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:36:59,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:36:59,586 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:36:59,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:36:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1693659951, now seen corresponding path program 7 times [2024-06-28 00:36:59,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:36:59,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333508125] [2024-06-28 00:36:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:36:59,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:36:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:02,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:02,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333508125] [2024-06-28 00:37:02,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333508125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:02,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:02,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:02,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474362252] [2024-06-28 00:37:02,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:02,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:02,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:02,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:02,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:02,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:02,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 307 transitions, 4859 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:02,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:02,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:02,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:04,038 INFO L124 PetriNetUnfolderBase]: 2057/3443 cut-off events. [2024-06-28 00:37:04,038 INFO L125 PetriNetUnfolderBase]: For 177350/177350 co-relation queries the response was YES. [2024-06-28 00:37:04,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30175 conditions, 3443 events. 2057/3443 cut-off events. For 177350/177350 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20687 event pairs, 657 based on Foata normal form. 1/3443 useless extension candidates. Maximal degree in co-relation 30081. Up to 3108 conditions per place. [2024-06-28 00:37:04,072 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 241 selfloop transitions, 83 changer transitions 0/329 dead transitions. [2024-06-28 00:37:04,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 329 transitions, 5650 flow [2024-06-28 00:37:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 00:37:04,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-28 00:37:04,073 INFO L175 Difference]: Start difference. First operand has 208 places, 307 transitions, 4859 flow. Second operand 8 states and 134 transitions. [2024-06-28 00:37:04,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 329 transitions, 5650 flow [2024-06-28 00:37:04,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 329 transitions, 5278 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-28 00:37:04,312 INFO L231 Difference]: Finished difference. Result has 210 places, 307 transitions, 4658 flow [2024-06-28 00:37:04,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4487, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4658, PETRI_PLACES=210, PETRI_TRANSITIONS=307} [2024-06-28 00:37:04,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-28 00:37:04,313 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 307 transitions, 4658 flow [2024-06-28 00:37:04,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:04,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:04,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:04,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:37:04,313 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)] === [2024-06-28 00:37:04,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:04,314 INFO L85 PathProgramCache]: Analyzing trace with hash 707005575, now seen corresponding path program 8 times [2024-06-28 00:37:04,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:04,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666947548] [2024-06-28 00:37:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:04,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:07,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:07,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666947548] [2024-06-28 00:37:07,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666947548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:07,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:07,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:37:07,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567907539] [2024-06-28 00:37:07,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:07,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:37:07,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:07,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:37:07,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:37:07,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:07,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 307 transitions, 4658 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:07,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:07,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:07,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:08,947 INFO L124 PetriNetUnfolderBase]: 2056/3437 cut-off events. [2024-06-28 00:37:08,947 INFO L125 PetriNetUnfolderBase]: For 181632/181632 co-relation queries the response was YES. [2024-06-28 00:37:08,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30073 conditions, 3437 events. 2056/3437 cut-off events. For 181632/181632 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20581 event pairs, 667 based on Foata normal form. 1/3437 useless extension candidates. Maximal degree in co-relation 29978. Up to 3181 conditions per place. [2024-06-28 00:37:08,985 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 261 selfloop transitions, 59 changer transitions 0/325 dead transitions. [2024-06-28 00:37:08,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 325 transitions, 5381 flow [2024-06-28 00:37:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:37:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:37:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 00:37:08,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 00:37:08,987 INFO L175 Difference]: Start difference. First operand has 210 places, 307 transitions, 4658 flow. Second operand 8 states and 129 transitions. [2024-06-28 00:37:08,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 325 transitions, 5381 flow [2024-06-28 00:37:09,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 325 transitions, 5157 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 00:37:09,278 INFO L231 Difference]: Finished difference. Result has 210 places, 309 transitions, 4601 flow [2024-06-28 00:37:09,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4438, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4601, PETRI_PLACES=210, PETRI_TRANSITIONS=309} [2024-06-28 00:37:09,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-28 00:37:09,279 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 309 transitions, 4601 flow [2024-06-28 00:37:09,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:09,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:09,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:09,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:37:09,280 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:09,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:09,280 INFO L85 PathProgramCache]: Analyzing trace with hash -46767891, now seen corresponding path program 1 times [2024-06-28 00:37:09,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:09,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781370344] [2024-06-28 00:37:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:09,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:12,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:12,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781370344] [2024-06-28 00:37:12,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781370344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:12,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:12,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:12,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179873672] [2024-06-28 00:37:12,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:12,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:12,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:12,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:12,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 309 transitions, 4601 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:12,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:12,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:12,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:14,378 INFO L124 PetriNetUnfolderBase]: 2063/3448 cut-off events. [2024-06-28 00:37:14,378 INFO L125 PetriNetUnfolderBase]: For 190911/190911 co-relation queries the response was YES. [2024-06-28 00:37:14,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30109 conditions, 3448 events. 2063/3448 cut-off events. For 190911/190911 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20732 event pairs, 928 based on Foata normal form. 3/3451 useless extension candidates. Maximal degree in co-relation 30014. Up to 3255 conditions per place. [2024-06-28 00:37:14,483 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 307 selfloop transitions, 27 changer transitions 0/339 dead transitions. [2024-06-28 00:37:14,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 339 transitions, 5583 flow [2024-06-28 00:37:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:14,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 00:37:14,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-28 00:37:14,485 INFO L175 Difference]: Start difference. First operand has 210 places, 309 transitions, 4601 flow. Second operand 9 states and 145 transitions. [2024-06-28 00:37:14,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 339 transitions, 5583 flow [2024-06-28 00:37:14,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 339 transitions, 5424 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 00:37:14,770 INFO L231 Difference]: Finished difference. Result has 213 places, 315 transitions, 4602 flow [2024-06-28 00:37:14,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4602, PETRI_PLACES=213, PETRI_TRANSITIONS=315} [2024-06-28 00:37:14,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-28 00:37:14,771 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 315 transitions, 4602 flow [2024-06-28 00:37:14,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:14,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:14,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:14,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:37:14,771 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:14,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:14,773 INFO L85 PathProgramCache]: Analyzing trace with hash -46762156, now seen corresponding path program 1 times [2024-06-28 00:37:14,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:14,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036309359] [2024-06-28 00:37:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:14,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:18,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:18,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036309359] [2024-06-28 00:37:18,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036309359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:18,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:18,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:37:18,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642554599] [2024-06-28 00:37:18,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:18,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:37:18,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:18,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:37:18,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:37:18,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:18,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 315 transitions, 4602 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:18,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:18,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:18,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:19,769 INFO L124 PetriNetUnfolderBase]: 2253/3763 cut-off events. [2024-06-28 00:37:19,770 INFO L125 PetriNetUnfolderBase]: For 223397/223397 co-relation queries the response was YES. [2024-06-28 00:37:19,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33909 conditions, 3763 events. 2253/3763 cut-off events. For 223397/223397 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22980 event pairs, 576 based on Foata normal form. 1/3764 useless extension candidates. Maximal degree in co-relation 33811. Up to 2754 conditions per place. [2024-06-28 00:37:19,815 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 222 selfloop transitions, 126 changer transitions 0/353 dead transitions. [2024-06-28 00:37:19,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 353 transitions, 5724 flow [2024-06-28 00:37:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:37:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:37:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 00:37:19,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-28 00:37:19,828 INFO L175 Difference]: Start difference. First operand has 213 places, 315 transitions, 4602 flow. Second operand 7 states and 126 transitions. [2024-06-28 00:37:19,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 353 transitions, 5724 flow [2024-06-28 00:37:20,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 353 transitions, 5662 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 00:37:20,178 INFO L231 Difference]: Finished difference. Result has 216 places, 329 transitions, 5121 flow [2024-06-28 00:37:20,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4540, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5121, PETRI_PLACES=216, PETRI_TRANSITIONS=329} [2024-06-28 00:37:20,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-28 00:37:20,178 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 329 transitions, 5121 flow [2024-06-28 00:37:20,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:20,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:20,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:20,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:37:20,179 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:20,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash 536964995, now seen corresponding path program 1 times [2024-06-28 00:37:20,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:20,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847296801] [2024-06-28 00:37:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:20,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:24,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:24,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847296801] [2024-06-28 00:37:24,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847296801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:24,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:24,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:37:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187163706] [2024-06-28 00:37:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:24,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:37:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:37:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:37:24,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:24,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 329 transitions, 5121 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:24,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:24,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:24,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:25,919 INFO L124 PetriNetUnfolderBase]: 2251/3764 cut-off events. [2024-06-28 00:37:25,919 INFO L125 PetriNetUnfolderBase]: For 236527/236527 co-relation queries the response was YES. [2024-06-28 00:37:25,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35664 conditions, 3764 events. 2251/3764 cut-off events. For 236527/236527 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22933 event pairs, 1016 based on Foata normal form. 1/3765 useless extension candidates. Maximal degree in co-relation 35564. Up to 3581 conditions per place. [2024-06-28 00:37:25,967 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 314 selfloop transitions, 23 changer transitions 0/342 dead transitions. [2024-06-28 00:37:25,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 342 transitions, 5885 flow [2024-06-28 00:37:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:37:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:37:25,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 00:37:25,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-28 00:37:25,969 INFO L175 Difference]: Start difference. First operand has 216 places, 329 transitions, 5121 flow. Second operand 7 states and 108 transitions. [2024-06-28 00:37:25,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 342 transitions, 5885 flow [2024-06-28 00:37:26,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 342 transitions, 5823 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 00:37:26,398 INFO L231 Difference]: Finished difference. Result has 220 places, 331 transitions, 5173 flow [2024-06-28 00:37:26,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5065, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5173, PETRI_PLACES=220, PETRI_TRANSITIONS=331} [2024-06-28 00:37:26,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-28 00:37:26,399 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 331 transitions, 5173 flow [2024-06-28 00:37:26,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:26,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:26,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:26,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:37:26,400 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:37:26,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:26,400 INFO L85 PathProgramCache]: Analyzing trace with hash 840141821, now seen corresponding path program 1 times [2024-06-28 00:37:26,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:26,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487672068] [2024-06-28 00:37:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:26,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:30,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:30,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487672068] [2024-06-28 00:37:30,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487672068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:30,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:30,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:37:30,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994828048] [2024-06-28 00:37:30,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:30,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:37:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:37:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:37:30,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:30,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 331 transitions, 5173 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:30,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:30,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:30,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:32,760 INFO L124 PetriNetUnfolderBase]: 2280/3810 cut-off events. [2024-06-28 00:37:32,760 INFO L125 PetriNetUnfolderBase]: For 237777/237777 co-relation queries the response was YES. [2024-06-28 00:37:32,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35785 conditions, 3810 events. 2280/3810 cut-off events. For 237777/237777 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23144 event pairs, 676 based on Foata normal form. 2/3812 useless extension candidates. Maximal degree in co-relation 35683. Up to 3503 conditions per place. [2024-06-28 00:37:32,807 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 288 selfloop transitions, 88 changer transitions 0/381 dead transitions. [2024-06-28 00:37:32,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 381 transitions, 6384 flow [2024-06-28 00:37:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:37:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:37:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 00:37:32,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-28 00:37:32,809 INFO L175 Difference]: Start difference. First operand has 220 places, 331 transitions, 5173 flow. Second operand 9 states and 159 transitions. [2024-06-28 00:37:32,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 381 transitions, 6384 flow [2024-06-28 00:37:33,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 381 transitions, 6310 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 00:37:33,200 INFO L231 Difference]: Finished difference. Result has 224 places, 348 transitions, 5654 flow [2024-06-28 00:37:33,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5099, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5654, PETRI_PLACES=224, PETRI_TRANSITIONS=348} [2024-06-28 00:37:33,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-28 00:37:33,201 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 348 transitions, 5654 flow [2024-06-28 00:37:33,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:33,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:33,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:33,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:37:33,201 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)] === [2024-06-28 00:37:33,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:33,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1396985763, now seen corresponding path program 1 times [2024-06-28 00:37:33,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:33,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757730264] [2024-06-28 00:37:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:33,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:36,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:36,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757730264] [2024-06-28 00:37:36,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757730264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:36,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:36,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:37:36,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335879144] [2024-06-28 00:37:36,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:36,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:37:36,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:37:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:37:36,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:36,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 348 transitions, 5654 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:36,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:36,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:36,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:38,430 INFO L124 PetriNetUnfolderBase]: 2331/3896 cut-off events. [2024-06-28 00:37:38,430 INFO L125 PetriNetUnfolderBase]: For 252100/252100 co-relation queries the response was YES. [2024-06-28 00:37:38,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37289 conditions, 3896 events. 2331/3896 cut-off events. For 252100/252100 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23683 event pairs, 708 based on Foata normal form. 2/3898 useless extension candidates. Maximal degree in co-relation 37186. Up to 3538 conditions per place. [2024-06-28 00:37:38,472 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 359 selfloop transitions, 65 changer transitions 0/429 dead transitions. [2024-06-28 00:37:38,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 429 transitions, 7391 flow [2024-06-28 00:37:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:37:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:37:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 233 transitions. [2024-06-28 00:37:38,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38704318936877075 [2024-06-28 00:37:38,474 INFO L175 Difference]: Start difference. First operand has 224 places, 348 transitions, 5654 flow. Second operand 14 states and 233 transitions. [2024-06-28 00:37:38,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 429 transitions, 7391 flow [2024-06-28 00:37:38,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 429 transitions, 7223 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-28 00:37:38,871 INFO L231 Difference]: Finished difference. Result has 237 places, 376 transitions, 6342 flow [2024-06-28 00:37:38,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5486, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6342, PETRI_PLACES=237, PETRI_TRANSITIONS=376} [2024-06-28 00:37:38,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-28 00:37:38,872 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 376 transitions, 6342 flow [2024-06-28 00:37:38,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:37:38,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:38,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:38,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:37:38,873 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)] === [2024-06-28 00:37:38,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:38,873 INFO L85 PathProgramCache]: Analyzing trace with hash 739745343, now seen corresponding path program 1 times [2024-06-28 00:37:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:38,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208231407] [2024-06-28 00:37:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:38,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:43,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:43,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208231407] [2024-06-28 00:37:43,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208231407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:43,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:43,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:37:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419523674] [2024-06-28 00:37:43,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:43,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:37:43,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:43,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:37:43,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:37:43,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:43,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 376 transitions, 6342 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:43,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:43,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:43,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:45,517 INFO L124 PetriNetUnfolderBase]: 2900/4815 cut-off events. [2024-06-28 00:37:45,518 INFO L125 PetriNetUnfolderBase]: For 417234/417234 co-relation queries the response was YES. [2024-06-28 00:37:45,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44717 conditions, 4815 events. 2900/4815 cut-off events. For 417234/417234 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 29578 event pairs, 859 based on Foata normal form. 127/4942 useless extension candidates. Maximal degree in co-relation 44609. Up to 3312 conditions per place. [2024-06-28 00:37:45,573 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 304 selfloop transitions, 166 changer transitions 14/489 dead transitions. [2024-06-28 00:37:45,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 489 transitions, 9104 flow [2024-06-28 00:37:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:37:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:37:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 235 transitions. [2024-06-28 00:37:45,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4203935599284436 [2024-06-28 00:37:45,575 INFO L175 Difference]: Start difference. First operand has 237 places, 376 transitions, 6342 flow. Second operand 13 states and 235 transitions. [2024-06-28 00:37:45,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 489 transitions, 9104 flow [2024-06-28 00:37:46,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 489 transitions, 8690 flow, removed 186 selfloop flow, removed 6 redundant places. [2024-06-28 00:37:46,223 INFO L231 Difference]: Finished difference. Result has 251 places, 420 transitions, 7530 flow [2024-06-28 00:37:46,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5954, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7530, PETRI_PLACES=251, PETRI_TRANSITIONS=420} [2024-06-28 00:37:46,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-28 00:37:46,223 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 420 transitions, 7530 flow [2024-06-28 00:37:46,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:46,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:46,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:46,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:37:46,224 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)] === [2024-06-28 00:37:46,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:46,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1970812613, now seen corresponding path program 2 times [2024-06-28 00:37:46,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:46,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838382891] [2024-06-28 00:37:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:46,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:49,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838382891] [2024-06-28 00:37:49,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838382891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:49,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:49,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:37:49,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761774270] [2024-06-28 00:37:49,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:49,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:37:49,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:37:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:37:49,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:49,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 420 transitions, 7530 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:49,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:49,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:49,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:51,493 INFO L124 PetriNetUnfolderBase]: 2790/4649 cut-off events. [2024-06-28 00:37:51,493 INFO L125 PetriNetUnfolderBase]: For 356133/356133 co-relation queries the response was YES. [2024-06-28 00:37:51,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46113 conditions, 4649 events. 2790/4649 cut-off events. For 356133/356133 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28905 event pairs, 888 based on Foata normal form. 2/4651 useless extension candidates. Maximal degree in co-relation 45997. Up to 4360 conditions per place. [2024-06-28 00:37:51,554 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 396 selfloop transitions, 58 changer transitions 0/459 dead transitions. [2024-06-28 00:37:51,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 459 transitions, 8678 flow [2024-06-28 00:37:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:37:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:37:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-28 00:37:51,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-28 00:37:51,556 INFO L175 Difference]: Start difference. First operand has 251 places, 420 transitions, 7530 flow. Second operand 10 states and 171 transitions. [2024-06-28 00:37:51,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 459 transitions, 8678 flow [2024-06-28 00:37:52,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 459 transitions, 8240 flow, removed 176 selfloop flow, removed 4 redundant places. [2024-06-28 00:37:52,417 INFO L231 Difference]: Finished difference. Result has 257 places, 427 transitions, 7377 flow [2024-06-28 00:37:52,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7132, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7377, PETRI_PLACES=257, PETRI_TRANSITIONS=427} [2024-06-28 00:37:52,417 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-28 00:37:52,417 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 427 transitions, 7377 flow [2024-06-28 00:37:52,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:52,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:52,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:52,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:37:52,418 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)] === [2024-06-28 00:37:52,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1397468579, now seen corresponding path program 3 times [2024-06-28 00:37:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985638409] [2024-06-28 00:37:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:37:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:37:55,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:37:55,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985638409] [2024-06-28 00:37:55,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985638409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:37:55,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:37:55,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:37:55,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414952756] [2024-06-28 00:37:55,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:37:55,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:37:55,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:37:55,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:37:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:37:55,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:37:55,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 427 transitions, 7377 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:55,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:37:55,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:37:55,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:37:58,068 INFO L124 PetriNetUnfolderBase]: 3228/5416 cut-off events. [2024-06-28 00:37:58,069 INFO L125 PetriNetUnfolderBase]: For 367277/367277 co-relation queries the response was YES. [2024-06-28 00:37:58,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49643 conditions, 5416 events. 3228/5416 cut-off events. For 367277/367277 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 34326 event pairs, 1117 based on Foata normal form. 6/5422 useless extension candidates. Maximal degree in co-relation 49526. Up to 4338 conditions per place. [2024-06-28 00:37:58,137 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 412 selfloop transitions, 81 changer transitions 3/501 dead transitions. [2024-06-28 00:37:58,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 501 transitions, 9348 flow [2024-06-28 00:37:58,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:37:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:37:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-28 00:37:58,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226215644820297 [2024-06-28 00:37:58,138 INFO L175 Difference]: Start difference. First operand has 257 places, 427 transitions, 7377 flow. Second operand 11 states and 195 transitions. [2024-06-28 00:37:58,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 501 transitions, 9348 flow [2024-06-28 00:37:58,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 501 transitions, 9178 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 00:37:58,945 INFO L231 Difference]: Finished difference. Result has 263 places, 440 transitions, 7771 flow [2024-06-28 00:37:58,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7231, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7771, PETRI_PLACES=263, PETRI_TRANSITIONS=440} [2024-06-28 00:37:58,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 219 predicate places. [2024-06-28 00:37:58,946 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 440 transitions, 7771 flow [2024-06-28 00:37:58,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:37:58,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:37:58,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:37:58,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:37:58,946 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)] === [2024-06-28 00:37:58,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:37:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash 911176481, now seen corresponding path program 1 times [2024-06-28 00:37:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:37:58,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433977492] [2024-06-28 00:37:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:37:58,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:37:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:05,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:05,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433977492] [2024-06-28 00:38:05,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433977492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:05,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:05,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:38:05,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346938476] [2024-06-28 00:38:05,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:05,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:38:05,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:05,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:38:05,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:38:05,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:05,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 440 transitions, 7771 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:05,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:05,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:05,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:07,795 INFO L124 PetriNetUnfolderBase]: 3266/5447 cut-off events. [2024-06-28 00:38:07,796 INFO L125 PetriNetUnfolderBase]: For 386577/386577 co-relation queries the response was YES. [2024-06-28 00:38:07,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50341 conditions, 5447 events. 3266/5447 cut-off events. For 386577/386577 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 34875 event pairs, 1119 based on Foata normal form. 12/5459 useless extension candidates. Maximal degree in co-relation 50222. Up to 5080 conditions per place. [2024-06-28 00:38:07,861 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 412 selfloop transitions, 62 changer transitions 0/479 dead transitions. [2024-06-28 00:38:07,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 479 transitions, 8951 flow [2024-06-28 00:38:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-28 00:38:07,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-28 00:38:07,862 INFO L175 Difference]: Start difference. First operand has 263 places, 440 transitions, 7771 flow. Second operand 10 states and 171 transitions. [2024-06-28 00:38:07,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 479 transitions, 8951 flow [2024-06-28 00:38:08,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 479 transitions, 8832 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 00:38:08,691 INFO L231 Difference]: Finished difference. Result has 267 places, 441 transitions, 7812 flow [2024-06-28 00:38:08,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7652, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7812, PETRI_PLACES=267, PETRI_TRANSITIONS=441} [2024-06-28 00:38:08,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-28 00:38:08,692 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 441 transitions, 7812 flow [2024-06-28 00:38:08,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:08,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:08,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:08,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:38:08,692 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:08,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:08,693 INFO L85 PathProgramCache]: Analyzing trace with hash -929460765, now seen corresponding path program 2 times [2024-06-28 00:38:08,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:08,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452835586] [2024-06-28 00:38:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:08,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:11,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452835586] [2024-06-28 00:38:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452835586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:11,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:11,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772068996] [2024-06-28 00:38:11,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:11,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:11,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:11,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:11,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:11,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 441 transitions, 7812 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:11,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:11,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:11,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:14,062 INFO L124 PetriNetUnfolderBase]: 3324/5532 cut-off events. [2024-06-28 00:38:14,063 INFO L125 PetriNetUnfolderBase]: For 393186/393186 co-relation queries the response was YES. [2024-06-28 00:38:14,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51856 conditions, 5532 events. 3324/5532 cut-off events. For 393186/393186 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 35297 event pairs, 1137 based on Foata normal form. 2/5533 useless extension candidates. Maximal degree in co-relation 51736. Up to 5149 conditions per place. [2024-06-28 00:38:14,141 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 432 selfloop transitions, 60 changer transitions 0/497 dead transitions. [2024-06-28 00:38:14,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 497 transitions, 9432 flow [2024-06-28 00:38:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 00:38:14,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-28 00:38:14,143 INFO L175 Difference]: Start difference. First operand has 267 places, 441 transitions, 7812 flow. Second operand 10 states and 174 transitions. [2024-06-28 00:38:14,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 497 transitions, 9432 flow [2024-06-28 00:38:14,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 497 transitions, 9310 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 00:38:14,865 INFO L231 Difference]: Finished difference. Result has 271 places, 459 transitions, 8296 flow [2024-06-28 00:38:14,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7690, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8296, PETRI_PLACES=271, PETRI_TRANSITIONS=459} [2024-06-28 00:38:14,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-28 00:38:14,866 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 459 transitions, 8296 flow [2024-06-28 00:38:14,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:14,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:14,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:14,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:38:14,866 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:14,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:14,867 INFO L85 PathProgramCache]: Analyzing trace with hash 152544113, now seen corresponding path program 4 times [2024-06-28 00:38:14,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:14,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417469366] [2024-06-28 00:38:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:14,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:18,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:18,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417469366] [2024-06-28 00:38:18,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417469366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:18,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:18,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:18,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51586055] [2024-06-28 00:38:18,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:18,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:18,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:18,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:18,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:18,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 459 transitions, 8296 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:38:18,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:18,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:18,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:21,656 INFO L124 PetriNetUnfolderBase]: 4642/7744 cut-off events. [2024-06-28 00:38:21,657 INFO L125 PetriNetUnfolderBase]: For 509385/509385 co-relation queries the response was YES. [2024-06-28 00:38:21,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66299 conditions, 7744 events. 4642/7744 cut-off events. For 509385/509385 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 52258 event pairs, 1699 based on Foata normal form. 42/7785 useless extension candidates. Maximal degree in co-relation 66176. Up to 5175 conditions per place. [2024-06-28 00:38:21,783 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 415 selfloop transitions, 145 changer transitions 18/583 dead transitions. [2024-06-28 00:38:21,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 583 transitions, 11295 flow [2024-06-28 00:38:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-28 00:38:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-28 00:38:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 255 transitions. [2024-06-28 00:38:21,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 00:38:21,784 INFO L175 Difference]: Start difference. First operand has 271 places, 459 transitions, 8296 flow. Second operand 15 states and 255 transitions. [2024-06-28 00:38:21,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 583 transitions, 11295 flow [2024-06-28 00:38:22,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 583 transitions, 11158 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:22,752 INFO L231 Difference]: Finished difference. Result has 287 places, 502 transitions, 9546 flow [2024-06-28 00:38:22,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8159, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9546, PETRI_PLACES=287, PETRI_TRANSITIONS=502} [2024-06-28 00:38:22,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-28 00:38:22,753 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 502 transitions, 9546 flow [2024-06-28 00:38:22,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:38:22,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:22,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:22,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:38:22,753 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:22,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1008554783, now seen corresponding path program 2 times [2024-06-28 00:38:22,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:22,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272131192] [2024-06-28 00:38:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:22,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:27,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:27,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272131192] [2024-06-28 00:38:27,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272131192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:27,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:27,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913670996] [2024-06-28 00:38:27,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:27,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:27,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:27,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:27,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:27,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 502 transitions, 9546 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:38:27,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:27,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:27,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:31,180 INFO L124 PetriNetUnfolderBase]: 4445/7442 cut-off events. [2024-06-28 00:38:31,181 INFO L125 PetriNetUnfolderBase]: For 500842/500842 co-relation queries the response was YES. [2024-06-28 00:38:31,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66172 conditions, 7442 events. 4445/7442 cut-off events. For 500842/500842 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 50469 event pairs, 1584 based on Foata normal form. 12/7453 useless extension candidates. Maximal degree in co-relation 66044. Up to 6863 conditions per place. [2024-06-28 00:38:31,267 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 122 changer transitions 0/546 dead transitions. [2024-06-28 00:38:31,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 546 transitions, 10924 flow [2024-06-28 00:38:31,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:38:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:38:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 225 transitions. [2024-06-28 00:38:31,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37375415282392027 [2024-06-28 00:38:31,269 INFO L175 Difference]: Start difference. First operand has 287 places, 502 transitions, 9546 flow. Second operand 14 states and 225 transitions. [2024-06-28 00:38:31,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 546 transitions, 10924 flow [2024-06-28 00:38:32,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 546 transitions, 10782 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-28 00:38:32,203 INFO L231 Difference]: Finished difference. Result has 296 places, 504 transitions, 9708 flow [2024-06-28 00:38:32,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9404, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9708, PETRI_PLACES=296, PETRI_TRANSITIONS=504} [2024-06-28 00:38:32,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-28 00:38:32,203 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 504 transitions, 9708 flow [2024-06-28 00:38:32,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:38:32,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:32,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:32,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:38:32,204 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:32,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:32,204 INFO L85 PathProgramCache]: Analyzing trace with hash -700606303, now seen corresponding path program 5 times [2024-06-28 00:38:32,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:32,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351202820] [2024-06-28 00:38:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:32,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:36,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:36,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351202820] [2024-06-28 00:38:36,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351202820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:36,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:36,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:38:36,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486569440] [2024-06-28 00:38:36,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:36,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:38:36,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:38:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:38:36,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:36,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 504 transitions, 9708 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:38:36,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:36,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:36,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:38,458 INFO L124 PetriNetUnfolderBase]: 2800/4640 cut-off events. [2024-06-28 00:38:38,458 INFO L125 PetriNetUnfolderBase]: For 486540/486540 co-relation queries the response was YES. [2024-06-28 00:38:38,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51130 conditions, 4640 events. 2800/4640 cut-off events. For 486540/486540 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29021 event pairs, 644 based on Foata normal form. 59/4696 useless extension candidates. Maximal degree in co-relation 51000. Up to 3726 conditions per place. [2024-06-28 00:38:38,521 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 332 selfloop transitions, 202 changer transitions 0/539 dead transitions. [2024-06-28 00:38:38,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 539 transitions, 10979 flow [2024-06-28 00:38:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:38:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:38:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 00:38:38,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-28 00:38:38,522 INFO L175 Difference]: Start difference. First operand has 296 places, 504 transitions, 9708 flow. Second operand 10 states and 184 transitions. [2024-06-28 00:38:38,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 539 transitions, 10979 flow [2024-06-28 00:38:39,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 539 transitions, 10698 flow, removed 16 selfloop flow, removed 15 redundant places. [2024-06-28 00:38:39,315 INFO L231 Difference]: Finished difference. Result has 291 places, 501 transitions, 9680 flow [2024-06-28 00:38:39,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8754, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9680, PETRI_PLACES=291, PETRI_TRANSITIONS=501} [2024-06-28 00:38:39,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-28 00:38:39,316 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 501 transitions, 9680 flow [2024-06-28 00:38:39,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:38:39,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:39,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:39,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:38:39,316 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:39,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -700606489, now seen corresponding path program 3 times [2024-06-28 00:38:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:39,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583483756] [2024-06-28 00:38:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:39,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:42,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:42,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583483756] [2024-06-28 00:38:42,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583483756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:42,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:42,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:42,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805009892] [2024-06-28 00:38:42,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:42,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:42,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:42,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:42,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:42,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:42,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 501 transitions, 9680 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:42,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:42,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:42,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:44,615 INFO L124 PetriNetUnfolderBase]: 2894/4812 cut-off events. [2024-06-28 00:38:44,615 INFO L125 PetriNetUnfolderBase]: For 496669/496669 co-relation queries the response was YES. [2024-06-28 00:38:44,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54335 conditions, 4812 events. 2894/4812 cut-off events. For 496669/496669 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30452 event pairs, 394 based on Foata normal form. 2/4813 useless extension candidates. Maximal degree in co-relation 54205. Up to 3473 conditions per place. [2024-06-28 00:38:44,686 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 331 selfloop transitions, 224 changer transitions 0/560 dead transitions. [2024-06-28 00:38:44,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 560 transitions, 11553 flow [2024-06-28 00:38:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:38:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:38:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-28 00:38:44,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38477801268498946 [2024-06-28 00:38:44,688 INFO L175 Difference]: Start difference. First operand has 291 places, 501 transitions, 9680 flow. Second operand 11 states and 182 transitions. [2024-06-28 00:38:44,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 560 transitions, 11553 flow [2024-06-28 00:38:45,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 560 transitions, 11230 flow, removed 105 selfloop flow, removed 3 redundant places. [2024-06-28 00:38:45,600 INFO L231 Difference]: Finished difference. Result has 301 places, 521 transitions, 10539 flow [2024-06-28 00:38:45,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9361, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10539, PETRI_PLACES=301, PETRI_TRANSITIONS=521} [2024-06-28 00:38:45,601 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-28 00:38:45,601 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 521 transitions, 10539 flow [2024-06-28 00:38:45,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:45,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:45,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:45,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:38:45,602 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:45,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1641256677, now seen corresponding path program 4 times [2024-06-28 00:38:45,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:45,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675125455] [2024-06-28 00:38:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:45,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:38:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:38:48,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:38:48,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675125455] [2024-06-28 00:38:48,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675125455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:38:48,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:38:48,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:38:48,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137939131] [2024-06-28 00:38:48,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:38:48,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:38:48,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:38:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:38:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:38:48,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:38:48,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 521 transitions, 10539 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:48,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:38:48,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:38:48,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:38:51,628 INFO L124 PetriNetUnfolderBase]: 2901/4815 cut-off events. [2024-06-28 00:38:51,628 INFO L125 PetriNetUnfolderBase]: For 512290/512290 co-relation queries the response was YES. [2024-06-28 00:38:51,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56365 conditions, 4815 events. 2901/4815 cut-off events. For 512290/512290 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 30224 event pairs, 493 based on Foata normal form. 1/4815 useless extension candidates. Maximal degree in co-relation 56230. Up to 3374 conditions per place. [2024-06-28 00:38:51,703 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 287 selfloop transitions, 277 changer transitions 0/569 dead transitions. [2024-06-28 00:38:51,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 569 transitions, 12599 flow [2024-06-28 00:38:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:38:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:38:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-28 00:38:51,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.374031007751938 [2024-06-28 00:38:51,704 INFO L175 Difference]: Start difference. First operand has 301 places, 521 transitions, 10539 flow. Second operand 12 states and 193 transitions. [2024-06-28 00:38:51,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 569 transitions, 12599 flow [2024-06-28 00:38:52,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 569 transitions, 12435 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-28 00:38:52,982 INFO L231 Difference]: Finished difference. Result has 311 places, 539 transitions, 11939 flow [2024-06-28 00:38:52,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10383, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11939, PETRI_PLACES=311, PETRI_TRANSITIONS=539} [2024-06-28 00:38:52,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-28 00:38:52,983 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 539 transitions, 11939 flow [2024-06-28 00:38:52,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:38:52,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:38:52,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:38:52,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:38:52,984 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:38:52,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:38:52,985 INFO L85 PathProgramCache]: Analyzing trace with hash -2070229091, now seen corresponding path program 6 times [2024-06-28 00:38:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:38:52,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172861291] [2024-06-28 00:38:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:38:52,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:38:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:01,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:01,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172861291] [2024-06-28 00:39:01,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172861291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:01,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:01,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:39:01,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590734934] [2024-06-28 00:39:01,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:01,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:39:01,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:01,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:39:01,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:39:01,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:01,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 539 transitions, 11939 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:01,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:01,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:01,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:04,080 INFO L124 PetriNetUnfolderBase]: 2911/4835 cut-off events. [2024-06-28 00:39:04,081 INFO L125 PetriNetUnfolderBase]: For 580130/580130 co-relation queries the response was YES. [2024-06-28 00:39:04,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59412 conditions, 4835 events. 2911/4835 cut-off events. For 580130/580130 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 30731 event pairs, 1092 based on Foata normal form. 2/4837 useless extension candidates. Maximal degree in co-relation 59272. Up to 4573 conditions per place. [2024-06-28 00:39:04,152 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 525 selfloop transitions, 31 changer transitions 0/561 dead transitions. [2024-06-28 00:39:04,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 561 transitions, 13291 flow [2024-06-28 00:39:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:39:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:39:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-28 00:39:04,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35917312661498707 [2024-06-28 00:39:04,169 INFO L175 Difference]: Start difference. First operand has 311 places, 539 transitions, 11939 flow. Second operand 9 states and 139 transitions. [2024-06-28 00:39:04,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 561 transitions, 13291 flow [2024-06-28 00:39:05,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 561 transitions, 12714 flow, removed 263 selfloop flow, removed 4 redundant places. [2024-06-28 00:39:05,506 INFO L231 Difference]: Finished difference. Result has 316 places, 542 transitions, 11577 flow [2024-06-28 00:39:05,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11362, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11577, PETRI_PLACES=316, PETRI_TRANSITIONS=542} [2024-06-28 00:39:05,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-28 00:39:05,506 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 542 transitions, 11577 flow [2024-06-28 00:39:05,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:05,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:05,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:05,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:39:05,507 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:05,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2070674747, now seen corresponding path program 5 times [2024-06-28 00:39:05,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:05,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829770893] [2024-06-28 00:39:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:05,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:08,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:08,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829770893] [2024-06-28 00:39:08,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829770893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:08,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:08,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:39:08,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133880945] [2024-06-28 00:39:08,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:08,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:39:08,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:08,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:39:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:39:08,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:08,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 542 transitions, 11577 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:08,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:08,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:08,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:11,055 INFO L124 PetriNetUnfolderBase]: 2914/4833 cut-off events. [2024-06-28 00:39:11,055 INFO L125 PetriNetUnfolderBase]: For 581025/581025 co-relation queries the response was YES. [2024-06-28 00:39:11,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59497 conditions, 4833 events. 2914/4833 cut-off events. For 581025/581025 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30494 event pairs, 709 based on Foata normal form. 1/4833 useless extension candidates. Maximal degree in co-relation 59354. Up to 4323 conditions per place. [2024-06-28 00:39:11,127 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 463 selfloop transitions, 107 changer transitions 0/575 dead transitions. [2024-06-28 00:39:11,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 575 transitions, 12992 flow [2024-06-28 00:39:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:39:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:39:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-28 00:39:11,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35852713178294576 [2024-06-28 00:39:11,129 INFO L175 Difference]: Start difference. First operand has 316 places, 542 transitions, 11577 flow. Second operand 12 states and 185 transitions. [2024-06-28 00:39:11,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 575 transitions, 12992 flow [2024-06-28 00:39:12,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 575 transitions, 12793 flow, removed 68 selfloop flow, removed 8 redundant places. [2024-06-28 00:39:12,258 INFO L231 Difference]: Finished difference. Result has 320 places, 546 transitions, 11702 flow [2024-06-28 00:39:12,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11335, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11702, PETRI_PLACES=320, PETRI_TRANSITIONS=546} [2024-06-28 00:39:12,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-28 00:39:12,259 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 546 transitions, 11702 flow [2024-06-28 00:39:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:39:12,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:12,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:12,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:39:12,260 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:12,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2070674561, now seen corresponding path program 7 times [2024-06-28 00:39:12,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:12,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535517927] [2024-06-28 00:39:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:16,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:16,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535517927] [2024-06-28 00:39:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535517927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:16,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:16,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:16,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512606079] [2024-06-28 00:39:16,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:16,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:16,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:16,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:16,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:16,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:16,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 546 transitions, 11702 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:16,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:16,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:16,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:18,188 INFO L124 PetriNetUnfolderBase]: 2908/4809 cut-off events. [2024-06-28 00:39:18,189 INFO L125 PetriNetUnfolderBase]: For 552399/552399 co-relation queries the response was YES. [2024-06-28 00:39:18,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58800 conditions, 4809 events. 2908/4809 cut-off events. For 552399/552399 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30259 event pairs, 607 based on Foata normal form. 2/4808 useless extension candidates. Maximal degree in co-relation 58656. Up to 3762 conditions per place. [2024-06-28 00:39:18,264 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 338 selfloop transitions, 233 changer transitions 0/576 dead transitions. [2024-06-28 00:39:18,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 576 transitions, 13436 flow [2024-06-28 00:39:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:39:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:39:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 00:39:18,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-28 00:39:18,266 INFO L175 Difference]: Start difference. First operand has 320 places, 546 transitions, 11702 flow. Second operand 8 states and 146 transitions. [2024-06-28 00:39:18,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 576 transitions, 13436 flow [2024-06-28 00:39:19,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 576 transitions, 13264 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 00:39:19,672 INFO L231 Difference]: Finished difference. Result has 322 places, 549 transitions, 12154 flow [2024-06-28 00:39:19,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11530, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12154, PETRI_PLACES=322, PETRI_TRANSITIONS=549} [2024-06-28 00:39:19,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-28 00:39:19,673 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 549 transitions, 12154 flow [2024-06-28 00:39:19,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:19,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:19,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:19,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:39:19,674 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:19,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash -99609735, now seen corresponding path program 8 times [2024-06-28 00:39:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:19,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547350825] [2024-06-28 00:39:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:23,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:23,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547350825] [2024-06-28 00:39:23,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547350825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:23,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:23,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:23,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534160041] [2024-06-28 00:39:23,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:23,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:23,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:23,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:23,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:23,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:23,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 549 transitions, 12154 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:23,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:23,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:23,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:25,910 INFO L124 PetriNetUnfolderBase]: 2912/4837 cut-off events. [2024-06-28 00:39:25,911 INFO L125 PetriNetUnfolderBase]: For 572127/572127 co-relation queries the response was YES. [2024-06-28 00:39:25,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59801 conditions, 4837 events. 2912/4837 cut-off events. For 572127/572127 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30705 event pairs, 1114 based on Foata normal form. 3/4840 useless extension candidates. Maximal degree in co-relation 59657. Up to 4586 conditions per place. [2024-06-28 00:39:25,986 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 536 selfloop transitions, 24 changer transitions 0/565 dead transitions. [2024-06-28 00:39:25,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 565 transitions, 13402 flow [2024-06-28 00:39:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:39:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:39:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 00:39:25,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-28 00:39:25,988 INFO L175 Difference]: Start difference. First operand has 322 places, 549 transitions, 12154 flow. Second operand 8 states and 120 transitions. [2024-06-28 00:39:25,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 565 transitions, 13402 flow [2024-06-28 00:39:27,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 565 transitions, 12814 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-28 00:39:27,245 INFO L231 Difference]: Finished difference. Result has 324 places, 551 transitions, 11679 flow [2024-06-28 00:39:27,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11568, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11679, PETRI_PLACES=324, PETRI_TRANSITIONS=551} [2024-06-28 00:39:27,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-28 00:39:27,247 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 551 transitions, 11679 flow [2024-06-28 00:39:27,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:27,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:27,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:39:27,247 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:27,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1905035427, now seen corresponding path program 9 times [2024-06-28 00:39:27,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:27,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472163364] [2024-06-28 00:39:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:27,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:31,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:31,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472163364] [2024-06-28 00:39:31,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472163364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:31,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:31,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557609355] [2024-06-28 00:39:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:31,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:31,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:31,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:31,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 551 transitions, 11679 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:31,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:31,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:31,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:33,412 INFO L124 PetriNetUnfolderBase]: 2915/4846 cut-off events. [2024-06-28 00:39:33,412 INFO L125 PetriNetUnfolderBase]: For 575196/575196 co-relation queries the response was YES. [2024-06-28 00:39:33,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59285 conditions, 4846 events. 2915/4846 cut-off events. For 575196/575196 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30723 event pairs, 662 based on Foata normal form. 1/4846 useless extension candidates. Maximal degree in co-relation 59139. Up to 4201 conditions per place. [2024-06-28 00:39:33,484 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 422 selfloop transitions, 161 changer transitions 0/588 dead transitions. [2024-06-28 00:39:33,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 588 transitions, 13484 flow [2024-06-28 00:39:33,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:39:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:39:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 00:39:33,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-28 00:39:33,486 INFO L175 Difference]: Start difference. First operand has 324 places, 551 transitions, 11679 flow. Second operand 10 states and 165 transitions. [2024-06-28 00:39:33,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 588 transitions, 13484 flow [2024-06-28 00:39:34,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 588 transitions, 13370 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-28 00:39:34,751 INFO L231 Difference]: Finished difference. Result has 329 places, 562 transitions, 12290 flow [2024-06-28 00:39:34,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11588, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12290, PETRI_PLACES=329, PETRI_TRANSITIONS=562} [2024-06-28 00:39:34,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-28 00:39:34,752 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 562 transitions, 12290 flow [2024-06-28 00:39:34,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:34,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:34,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:34,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:39:34,753 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:34,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:34,753 INFO L85 PathProgramCache]: Analyzing trace with hash 442338175, now seen corresponding path program 10 times [2024-06-28 00:39:34,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:34,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006880533] [2024-06-28 00:39:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:34,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:38,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:38,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006880533] [2024-06-28 00:39:38,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006880533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:38,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:38,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:38,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062096112] [2024-06-28 00:39:38,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:38,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:38,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:38,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:38,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 562 transitions, 12290 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:38,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:38,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:38,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:40,974 INFO L124 PetriNetUnfolderBase]: 2953/4906 cut-off events. [2024-06-28 00:39:40,974 INFO L125 PetriNetUnfolderBase]: For 595269/595269 co-relation queries the response was YES. [2024-06-28 00:39:41,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61062 conditions, 4906 events. 2953/4906 cut-off events. For 595269/595269 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31192 event pairs, 689 based on Foata normal form. 4/4909 useless extension candidates. Maximal degree in co-relation 60914. Up to 4352 conditions per place. [2024-06-28 00:39:41,055 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 458 selfloop transitions, 144 changer transitions 0/607 dead transitions. [2024-06-28 00:39:41,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 607 transitions, 14336 flow [2024-06-28 00:39:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:39:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:39:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 174 transitions. [2024-06-28 00:39:41,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3678646934460888 [2024-06-28 00:39:41,060 INFO L175 Difference]: Start difference. First operand has 329 places, 562 transitions, 12290 flow. Second operand 11 states and 174 transitions. [2024-06-28 00:39:41,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 607 transitions, 14336 flow [2024-06-28 00:39:42,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 607 transitions, 14113 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 00:39:42,449 INFO L231 Difference]: Finished difference. Result has 336 places, 576 transitions, 12818 flow [2024-06-28 00:39:42,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12079, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12818, PETRI_PLACES=336, PETRI_TRANSITIONS=576} [2024-06-28 00:39:42,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-28 00:39:42,450 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 576 transitions, 12818 flow [2024-06-28 00:39:42,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:42,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:42,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:42,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:39:42,451 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:42,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:42,451 INFO L85 PathProgramCache]: Analyzing trace with hash -548908769, now seen corresponding path program 11 times [2024-06-28 00:39:42,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:42,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649209676] [2024-06-28 00:39:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:42,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:46,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:46,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649209676] [2024-06-28 00:39:46,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649209676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:46,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:46,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:46,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703521126] [2024-06-28 00:39:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:46,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:46,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:46,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:46,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:46,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 576 transitions, 12818 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:46,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:46,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:46,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:48,339 INFO L124 PetriNetUnfolderBase]: 2949/4906 cut-off events. [2024-06-28 00:39:48,339 INFO L125 PetriNetUnfolderBase]: For 606922/606922 co-relation queries the response was YES. [2024-06-28 00:39:48,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61651 conditions, 4906 events. 2949/4906 cut-off events. For 606922/606922 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31281 event pairs, 1086 based on Foata normal form. 2/4908 useless extension candidates. Maximal degree in co-relation 61500. Up to 4665 conditions per place. [2024-06-28 00:39:48,419 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 564 selfloop transitions, 23 changer transitions 0/592 dead transitions. [2024-06-28 00:39:48,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 592 transitions, 14154 flow [2024-06-28 00:39:48,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:39:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:39:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 00:39:48,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-28 00:39:48,421 INFO L175 Difference]: Start difference. First operand has 336 places, 576 transitions, 12818 flow. Second operand 8 states and 120 transitions. [2024-06-28 00:39:48,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 592 transitions, 14154 flow [2024-06-28 00:39:50,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 592 transitions, 13926 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-28 00:39:50,075 INFO L231 Difference]: Finished difference. Result has 338 places, 580 transitions, 12770 flow [2024-06-28 00:39:50,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12594, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12770, PETRI_PLACES=338, PETRI_TRANSITIONS=580} [2024-06-28 00:39:50,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-28 00:39:50,076 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 580 transitions, 12770 flow [2024-06-28 00:39:50,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:50,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:50,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:50,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:39:50,076 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:50,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash 442575325, now seen corresponding path program 12 times [2024-06-28 00:39:50,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:50,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814630372] [2024-06-28 00:39:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:50,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:39:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:39:53,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:39:53,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814630372] [2024-06-28 00:39:53,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814630372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:39:53,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:39:53,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:39:53,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112386520] [2024-06-28 00:39:53,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:39:53,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:39:53,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:39:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:39:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:39:53,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:39:53,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 580 transitions, 12770 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:53,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:39:53,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:39:53,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:39:55,840 INFO L124 PetriNetUnfolderBase]: 2945/4895 cut-off events. [2024-06-28 00:39:55,840 INFO L125 PetriNetUnfolderBase]: For 615335/615335 co-relation queries the response was YES. [2024-06-28 00:39:55,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61668 conditions, 4895 events. 2945/4895 cut-off events. For 615335/615335 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31123 event pairs, 683 based on Foata normal form. 2/4896 useless extension candidates. Maximal degree in co-relation 61515. Up to 4504 conditions per place. [2024-06-28 00:39:55,921 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 499 selfloop transitions, 97 changer transitions 0/601 dead transitions. [2024-06-28 00:39:55,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 601 transitions, 14046 flow [2024-06-28 00:39:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:39:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:39:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-28 00:39:55,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3572938689217759 [2024-06-28 00:39:55,922 INFO L175 Difference]: Start difference. First operand has 338 places, 580 transitions, 12770 flow. Second operand 11 states and 169 transitions. [2024-06-28 00:39:55,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 601 transitions, 14046 flow [2024-06-28 00:39:57,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 601 transitions, 13947 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 00:39:57,773 INFO L231 Difference]: Finished difference. Result has 344 places, 582 transitions, 12905 flow [2024-06-28 00:39:57,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12671, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12905, PETRI_PLACES=344, PETRI_TRANSITIONS=582} [2024-06-28 00:39:57,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-28 00:39:57,774 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 582 transitions, 12905 flow [2024-06-28 00:39:57,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:39:57,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:39:57,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:39:57,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:39:57,775 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:39:57,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:39:57,775 INFO L85 PathProgramCache]: Analyzing trace with hash -976996511, now seen corresponding path program 3 times [2024-06-28 00:39:57,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:39:57,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136428116] [2024-06-28 00:39:57,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:39:57,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:39:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:02,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:02,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136428116] [2024-06-28 00:40:02,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136428116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:02,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:02,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:40:02,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854457436] [2024-06-28 00:40:02,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:02,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:40:02,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:02,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:40:02,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:40:02,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:02,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 582 transitions, 12905 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:40:02,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:02,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:02,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:04,731 INFO L124 PetriNetUnfolderBase]: 3025/5019 cut-off events. [2024-06-28 00:40:04,732 INFO L125 PetriNetUnfolderBase]: For 656795/656795 co-relation queries the response was YES. [2024-06-28 00:40:04,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63196 conditions, 5019 events. 3025/5019 cut-off events. For 656795/656795 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31931 event pairs, 638 based on Foata normal form. 12/5029 useless extension candidates. Maximal degree in co-relation 63042. Up to 4468 conditions per place. [2024-06-28 00:40:04,805 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 476 selfloop transitions, 130 changer transitions 0/611 dead transitions. [2024-06-28 00:40:04,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 611 transitions, 14396 flow [2024-06-28 00:40:04,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:40:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:40:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-28 00:40:04,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763213530655391 [2024-06-28 00:40:04,806 INFO L175 Difference]: Start difference. First operand has 344 places, 582 transitions, 12905 flow. Second operand 11 states and 178 transitions. [2024-06-28 00:40:04,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 611 transitions, 14396 flow [2024-06-28 00:40:06,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 611 transitions, 14201 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 00:40:06,158 INFO L231 Difference]: Finished difference. Result has 349 places, 584 transitions, 13041 flow [2024-06-28 00:40:06,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12710, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13041, PETRI_PLACES=349, PETRI_TRANSITIONS=584} [2024-06-28 00:40:06,158 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-28 00:40:06,158 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 584 transitions, 13041 flow [2024-06-28 00:40:06,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:40:06,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:06,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:06,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 00:40:06,159 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:06,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash 885918043, now seen corresponding path program 4 times [2024-06-28 00:40:06,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:06,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368510442] [2024-06-28 00:40:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:12,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:12,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368510442] [2024-06-28 00:40:12,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368510442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:12,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:12,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:40:12,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010895342] [2024-06-28 00:40:12,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:12,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:40:12,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:12,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:40:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:40:12,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:12,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 584 transitions, 13041 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:12,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:12,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:12,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:15,270 INFO L124 PetriNetUnfolderBase]: 3120/5183 cut-off events. [2024-06-28 00:40:15,270 INFO L125 PetriNetUnfolderBase]: For 695454/695454 co-relation queries the response was YES. [2024-06-28 00:40:15,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65661 conditions, 5183 events. 3120/5183 cut-off events. For 695454/695454 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 33363 event pairs, 1106 based on Foata normal form. 8/5191 useless extension candidates. Maximal degree in co-relation 65506. Up to 4794 conditions per place. [2024-06-28 00:40:15,347 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 574 selfloop transitions, 33 changer transitions 0/612 dead transitions. [2024-06-28 00:40:15,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 612 transitions, 14735 flow [2024-06-28 00:40:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 00:40:15,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-28 00:40:15,349 INFO L175 Difference]: Start difference. First operand has 349 places, 584 transitions, 13041 flow. Second operand 9 states and 143 transitions. [2024-06-28 00:40:15,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 612 transitions, 14735 flow [2024-06-28 00:40:16,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 612 transitions, 14487 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 00:40:17,004 INFO L231 Difference]: Finished difference. Result has 351 places, 588 transitions, 12987 flow [2024-06-28 00:40:17,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12793, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12987, PETRI_PLACES=351, PETRI_TRANSITIONS=588} [2024-06-28 00:40:17,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-28 00:40:17,005 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 588 transitions, 12987 flow [2024-06-28 00:40:17,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:17,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:17,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 00:40:17,006 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:17,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash 885413053, now seen corresponding path program 5 times [2024-06-28 00:40:17,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:17,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158189648] [2024-06-28 00:40:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:23,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:23,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158189648] [2024-06-28 00:40:23,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158189648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:23,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:23,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:40:23,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873131944] [2024-06-28 00:40:23,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:40:23,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:23,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:40:23,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:40:23,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:23,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 588 transitions, 12987 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:23,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:23,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:23,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:26,201 INFO L124 PetriNetUnfolderBase]: 3092/5141 cut-off events. [2024-06-28 00:40:26,201 INFO L125 PetriNetUnfolderBase]: For 693332/693332 co-relation queries the response was YES. [2024-06-28 00:40:26,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64502 conditions, 5141 events. 3092/5141 cut-off events. For 693332/693332 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33074 event pairs, 1108 based on Foata normal form. 12/5153 useless extension candidates. Maximal degree in co-relation 64345. Up to 4820 conditions per place. [2024-06-28 00:40:26,280 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 571 selfloop transitions, 30 changer transitions 0/606 dead transitions. [2024-06-28 00:40:26,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 606 transitions, 14352 flow [2024-06-28 00:40:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:40:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:40:26,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 00:40:26,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-28 00:40:26,281 INFO L175 Difference]: Start difference. First operand has 351 places, 588 transitions, 12987 flow. Second operand 8 states and 127 transitions. [2024-06-28 00:40:26,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 606 transitions, 14352 flow [2024-06-28 00:40:28,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 606 transitions, 14289 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 00:40:28,175 INFO L231 Difference]: Finished difference. Result has 355 places, 588 transitions, 12994 flow [2024-06-28 00:40:28,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12924, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12994, PETRI_PLACES=355, PETRI_TRANSITIONS=588} [2024-06-28 00:40:28,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-28 00:40:28,177 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 588 transitions, 12994 flow [2024-06-28 00:40:28,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:28,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:28,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:28,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 00:40:28,178 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:28,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:28,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2070213467, now seen corresponding path program 1 times [2024-06-28 00:40:28,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:28,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420980732] [2024-06-28 00:40:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:28,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:32,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:32,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420980732] [2024-06-28 00:40:32,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420980732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:32,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:32,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:40:32,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358949070] [2024-06-28 00:40:32,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:32,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:40:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:40:32,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:40:32,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:32,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 588 transitions, 12994 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:32,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:32,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:32,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:34,781 INFO L124 PetriNetUnfolderBase]: 3105/5151 cut-off events. [2024-06-28 00:40:34,782 INFO L125 PetriNetUnfolderBase]: For 682645/682645 co-relation queries the response was YES. [2024-06-28 00:40:34,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64909 conditions, 5151 events. 3105/5151 cut-off events. For 682645/682645 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 32979 event pairs, 807 based on Foata normal form. 1/5152 useless extension candidates. Maximal degree in co-relation 64750. Up to 3915 conditions per place. [2024-06-28 00:40:34,867 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 382 selfloop transitions, 236 changer transitions 0/623 dead transitions. [2024-06-28 00:40:34,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 623 transitions, 14788 flow [2024-06-28 00:40:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:40:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:40:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 00:40:34,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-28 00:40:34,869 INFO L175 Difference]: Start difference. First operand has 355 places, 588 transitions, 12994 flow. Second operand 8 states and 140 transitions. [2024-06-28 00:40:34,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 623 transitions, 14788 flow [2024-06-28 00:40:37,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 623 transitions, 14719 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 00:40:37,023 INFO L231 Difference]: Finished difference. Result has 356 places, 600 transitions, 13994 flow [2024-06-28 00:40:37,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12925, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13994, PETRI_PLACES=356, PETRI_TRANSITIONS=600} [2024-06-28 00:40:37,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-28 00:40:37,024 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 600 transitions, 13994 flow [2024-06-28 00:40:37,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:37,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:37,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:37,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 00:40:37,025 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:37,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:37,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2070213219, now seen corresponding path program 1 times [2024-06-28 00:40:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:37,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127892247] [2024-06-28 00:40:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:37,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:43,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:43,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127892247] [2024-06-28 00:40:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127892247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:43,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:43,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:40:43,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376399756] [2024-06-28 00:40:43,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:43,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:40:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:40:43,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:40:43,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:43,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 600 transitions, 13994 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:43,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:43,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:43,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:45,210 INFO L124 PetriNetUnfolderBase]: 3113/5173 cut-off events. [2024-06-28 00:40:45,211 INFO L125 PetriNetUnfolderBase]: For 730729/730729 co-relation queries the response was YES. [2024-06-28 00:40:45,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67236 conditions, 5173 events. 3113/5173 cut-off events. For 730729/730729 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 33321 event pairs, 1122 based on Foata normal form. 2/5175 useless extension candidates. Maximal degree in co-relation 67075. Up to 4892 conditions per place. [2024-06-28 00:40:45,291 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 586 selfloop transitions, 30 changer transitions 0/621 dead transitions. [2024-06-28 00:40:45,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 621 transitions, 15440 flow [2024-06-28 00:40:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:40:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:40:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-28 00:40:45,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35658914728682173 [2024-06-28 00:40:45,293 INFO L175 Difference]: Start difference. First operand has 356 places, 600 transitions, 13994 flow. Second operand 9 states and 138 transitions. [2024-06-28 00:40:45,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 621 transitions, 15440 flow [2024-06-28 00:40:47,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 621 transitions, 15366 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 00:40:47,333 INFO L231 Difference]: Finished difference. Result has 361 places, 602 transitions, 14106 flow [2024-06-28 00:40:47,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13920, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14106, PETRI_PLACES=361, PETRI_TRANSITIONS=602} [2024-06-28 00:40:47,333 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-28 00:40:47,334 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 602 transitions, 14106 flow [2024-06-28 00:40:47,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:47,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:47,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 00:40:47,334 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:47,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2070219977, now seen corresponding path program 2 times [2024-06-28 00:40:47,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:47,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679365066] [2024-06-28 00:40:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:40:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:40:51,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:40:51,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679365066] [2024-06-28 00:40:51,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679365066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:40:51,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:40:51,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:40:51,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555500880] [2024-06-28 00:40:51,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:40:51,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:40:51,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:40:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:40:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:40:51,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:40:51,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 602 transitions, 14106 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:51,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:40:51,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:40:51,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:40:54,181 INFO L124 PetriNetUnfolderBase]: 3118/5176 cut-off events. [2024-06-28 00:40:54,182 INFO L125 PetriNetUnfolderBase]: For 743225/743225 co-relation queries the response was YES. [2024-06-28 00:40:54,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67702 conditions, 5176 events. 3118/5176 cut-off events. For 743225/743225 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 33259 event pairs, 786 based on Foata normal form. 1/5177 useless extension candidates. Maximal degree in co-relation 67539. Up to 3781 conditions per place. [2024-06-28 00:40:54,266 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 389 selfloop transitions, 237 changer transitions 0/631 dead transitions. [2024-06-28 00:40:54,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 631 transitions, 15750 flow [2024-06-28 00:40:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:40:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:40:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 00:40:54,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-28 00:40:54,268 INFO L175 Difference]: Start difference. First operand has 361 places, 602 transitions, 14106 flow. Second operand 8 states and 135 transitions. [2024-06-28 00:40:54,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 631 transitions, 15750 flow [2024-06-28 00:40:56,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 631 transitions, 15595 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-28 00:40:56,378 INFO L231 Difference]: Finished difference. Result has 363 places, 609 transitions, 14854 flow [2024-06-28 00:40:56,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13951, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14854, PETRI_PLACES=363, PETRI_TRANSITIONS=609} [2024-06-28 00:40:56,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-28 00:40:56,379 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 609 transitions, 14854 flow [2024-06-28 00:40:56,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:40:56,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:40:56,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:40:56,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 00:40:56,379 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:40:56,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:40:56,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1449625161, now seen corresponding path program 1 times [2024-06-28 00:40:56,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:40:56,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472895830] [2024-06-28 00:40:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:40:56,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:40:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:00,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:00,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472895830] [2024-06-28 00:41:00,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472895830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:00,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:00,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:41:00,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637095213] [2024-06-28 00:41:00,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:00,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:41:00,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:41:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:41:00,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:00,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 609 transitions, 14854 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:00,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:00,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:00,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:03,033 INFO L124 PetriNetUnfolderBase]: 3120/5185 cut-off events. [2024-06-28 00:41:03,034 INFO L125 PetriNetUnfolderBase]: For 790235/790235 co-relation queries the response was YES. [2024-06-28 00:41:03,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69870 conditions, 5185 events. 3120/5185 cut-off events. For 790235/790235 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33432 event pairs, 1089 based on Foata normal form. 2/5187 useless extension candidates. Maximal degree in co-relation 69705. Up to 4903 conditions per place. [2024-06-28 00:41:03,119 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 602 selfloop transitions, 30 changer transitions 0/637 dead transitions. [2024-06-28 00:41:03,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 637 transitions, 16335 flow [2024-06-28 00:41:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:41:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:41:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 00:41:03,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-28 00:41:03,120 INFO L175 Difference]: Start difference. First operand has 363 places, 609 transitions, 14854 flow. Second operand 9 states and 143 transitions. [2024-06-28 00:41:03,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 637 transitions, 16335 flow [2024-06-28 00:41:05,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 637 transitions, 16245 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 00:41:05,215 INFO L231 Difference]: Finished difference. Result has 366 places, 615 transitions, 14982 flow [2024-06-28 00:41:05,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14764, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14982, PETRI_PLACES=366, PETRI_TRANSITIONS=615} [2024-06-28 00:41:05,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-28 00:41:05,216 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 615 transitions, 14982 flow [2024-06-28 00:41:05,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:05,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:05,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:05,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 00:41:05,216 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)] === [2024-06-28 00:41:05,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:05,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1449802915, now seen corresponding path program 1 times [2024-06-28 00:41:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:05,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769094669] [2024-06-28 00:41:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:05,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:09,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769094669] [2024-06-28 00:41:09,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769094669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:09,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:09,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:09,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005157539] [2024-06-28 00:41:09,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:09,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:09,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:09,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:09,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-28 00:41:09,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 615 transitions, 14982 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:09,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:09,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-28 00:41:09,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:11,244 INFO L124 PetriNetUnfolderBase]: 3025/5089 cut-off events. [2024-06-28 00:41:11,245 INFO L125 PetriNetUnfolderBase]: For 788206/788208 co-relation queries the response was YES. [2024-06-28 00:41:11,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68790 conditions, 5089 events. 3025/5089 cut-off events. For 788206/788208 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33355 event pairs, 719 based on Foata normal form. 12/5064 useless extension candidates. Maximal degree in co-relation 68625. Up to 3508 conditions per place. [2024-06-28 00:41:11,327 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 311 selfloop transitions, 234 changer transitions 0/646 dead transitions. [2024-06-28 00:41:11,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 646 transitions, 16394 flow [2024-06-28 00:41:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:41:11,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:41:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:41:11,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-28 00:41:11,328 INFO L175 Difference]: Start difference. First operand has 366 places, 615 transitions, 14982 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:41:11,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 646 transitions, 16394 flow [2024-06-28 00:41:13,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 646 transitions, 16232 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-28 00:41:13,303 INFO L231 Difference]: Finished difference. Result has 369 places, 616 transitions, 15334 flow [2024-06-28 00:41:13,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14820, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15334, PETRI_PLACES=369, PETRI_TRANSITIONS=616} [2024-06-28 00:41:13,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-28 00:41:13,304 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 616 transitions, 15334 flow [2024-06-28 00:41:13,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:13,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:13,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:13,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 00:41:13,304 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)] === [2024-06-28 00:41:13,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash -770127807, now seen corresponding path program 2 times [2024-06-28 00:41:13,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:13,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295961098] [2024-06-28 00:41:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:13,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:18,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:18,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295961098] [2024-06-28 00:41:18,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295961098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:18,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:18,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:41:18,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822952015] [2024-06-28 00:41:18,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:18,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:41:18,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:18,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:41:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:41:18,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:18,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 616 transitions, 15334 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:18,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:18,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:18,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:20,840 INFO L124 PetriNetUnfolderBase]: 3257/5436 cut-off events. [2024-06-28 00:41:20,840 INFO L125 PetriNetUnfolderBase]: For 878788/878788 co-relation queries the response was YES. [2024-06-28 00:41:20,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72539 conditions, 5436 events. 3257/5436 cut-off events. For 878788/878788 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35290 event pairs, 1127 based on Foata normal form. 42/5478 useless extension candidates. Maximal degree in co-relation 72373. Up to 4939 conditions per place. [2024-06-28 00:41:21,080 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 606 selfloop transitions, 20 changer transitions 14/645 dead transitions. [2024-06-28 00:41:21,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 645 transitions, 17106 flow [2024-06-28 00:41:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:41:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:41:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-28 00:41:21,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35400516795865633 [2024-06-28 00:41:21,082 INFO L175 Difference]: Start difference. First operand has 369 places, 616 transitions, 15334 flow. Second operand 9 states and 137 transitions. [2024-06-28 00:41:21,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 645 transitions, 17106 flow [2024-06-28 00:41:22,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 645 transitions, 17055 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 00:41:22,929 INFO L231 Difference]: Finished difference. Result has 374 places, 617 transitions, 15372 flow [2024-06-28 00:41:22,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15283, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15372, PETRI_PLACES=374, PETRI_TRANSITIONS=617} [2024-06-28 00:41:22,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-28 00:41:22,930 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 617 transitions, 15372 flow [2024-06-28 00:41:22,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:22,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:22,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:22,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 00:41:22,931 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:22,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:22,931 INFO L85 PathProgramCache]: Analyzing trace with hash -533655777, now seen corresponding path program 3 times [2024-06-28 00:41:22,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:22,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343285583] [2024-06-28 00:41:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:22,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:27,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:27,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343285583] [2024-06-28 00:41:27,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343285583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:27,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:27,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:41:27,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765903293] [2024-06-28 00:41:27,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:27,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:41:27,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:27,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:41:27,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:41:27,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:27,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 617 transitions, 15372 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:27,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:27,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:27,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:29,837 INFO L124 PetriNetUnfolderBase]: 3126/5201 cut-off events. [2024-06-28 00:41:29,837 INFO L125 PetriNetUnfolderBase]: For 811640/811640 co-relation queries the response was YES. [2024-06-28 00:41:29,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71028 conditions, 5201 events. 3126/5201 cut-off events. For 811640/811640 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33553 event pairs, 1078 based on Foata normal form. 2/5203 useless extension candidates. Maximal degree in co-relation 70859. Up to 4940 conditions per place. [2024-06-28 00:41:29,917 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 609 selfloop transitions, 17 changer transitions 0/631 dead transitions. [2024-06-28 00:41:29,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 631 transitions, 16699 flow [2024-06-28 00:41:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:41:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:41:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-28 00:41:29,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3430232558139535 [2024-06-28 00:41:29,920 INFO L175 Difference]: Start difference. First operand has 374 places, 617 transitions, 15372 flow. Second operand 8 states and 118 transitions. [2024-06-28 00:41:29,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 631 transitions, 16699 flow [2024-06-28 00:41:31,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 631 transitions, 16624 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 00:41:32,002 INFO L231 Difference]: Finished difference. Result has 374 places, 618 transitions, 15374 flow [2024-06-28 00:41:32,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15297, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15374, PETRI_PLACES=374, PETRI_TRANSITIONS=618} [2024-06-28 00:41:32,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-28 00:41:32,005 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 618 transitions, 15374 flow [2024-06-28 00:41:32,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:32,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:32,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:32,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 00:41:32,006 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:32,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash 885628317, now seen corresponding path program 4 times [2024-06-28 00:41:32,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:32,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398053432] [2024-06-28 00:41:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:32,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:37,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:37,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398053432] [2024-06-28 00:41:37,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398053432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:37,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:37,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:41:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226287862] [2024-06-28 00:41:37,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:41:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:41:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:41:37,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:37,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 618 transitions, 15374 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:37,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:37,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:37,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:40,221 INFO L124 PetriNetUnfolderBase]: 3123/5194 cut-off events. [2024-06-28 00:41:40,221 INFO L125 PetriNetUnfolderBase]: For 805526/805526 co-relation queries the response was YES. [2024-06-28 00:41:40,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70776 conditions, 5194 events. 3123/5194 cut-off events. For 805526/805526 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33476 event pairs, 1091 based on Foata normal form. 2/5196 useless extension candidates. Maximal degree in co-relation 70607. Up to 4931 conditions per place. [2024-06-28 00:41:40,308 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 606 selfloop transitions, 23 changer transitions 0/634 dead transitions. [2024-06-28 00:41:40,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 634 transitions, 16761 flow [2024-06-28 00:41:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:41:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:41:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-28 00:41:40,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3359173126614987 [2024-06-28 00:41:40,309 INFO L175 Difference]: Start difference. First operand has 374 places, 618 transitions, 15374 flow. Second operand 9 states and 130 transitions. [2024-06-28 00:41:40,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 634 transitions, 16761 flow [2024-06-28 00:41:42,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 634 transitions, 16705 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 00:41:42,653 INFO L231 Difference]: Finished difference. Result has 378 places, 621 transitions, 15475 flow [2024-06-28 00:41:42,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15318, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15475, PETRI_PLACES=378, PETRI_TRANSITIONS=621} [2024-06-28 00:41:42,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-28 00:41:42,654 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 621 transitions, 15475 flow [2024-06-28 00:41:42,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:42,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:42,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:42,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 00:41:42,655 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:42,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1738594138, now seen corresponding path program 1 times [2024-06-28 00:41:42,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:42,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779335157] [2024-06-28 00:41:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:42,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:46,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:46,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779335157] [2024-06-28 00:41:46,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779335157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:46,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:46,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:41:46,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437679898] [2024-06-28 00:41:46,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:46,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:41:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:41:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:41:46,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:46,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 621 transitions, 15475 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:41:46,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:46,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:46,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:49,459 INFO L124 PetriNetUnfolderBase]: 3143/5211 cut-off events. [2024-06-28 00:41:49,459 INFO L125 PetriNetUnfolderBase]: For 820828/820828 co-relation queries the response was YES. [2024-06-28 00:41:49,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71576 conditions, 5211 events. 3143/5211 cut-off events. For 820828/820828 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33363 event pairs, 617 based on Foata normal form. 2/5213 useless extension candidates. Maximal degree in co-relation 71405. Up to 4717 conditions per place. [2024-06-28 00:41:49,550 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 544 selfloop transitions, 116 changer transitions 0/665 dead transitions. [2024-06-28 00:41:49,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 665 transitions, 17339 flow [2024-06-28 00:41:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:41:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:41:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-28 00:41:49,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 00:41:49,552 INFO L175 Difference]: Start difference. First operand has 378 places, 621 transitions, 15475 flow. Second operand 10 states and 172 transitions. [2024-06-28 00:41:49,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 665 transitions, 17339 flow [2024-06-28 00:41:52,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 665 transitions, 17255 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 00:41:52,421 INFO L231 Difference]: Finished difference. Result has 383 places, 632 transitions, 16144 flow [2024-06-28 00:41:52,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15391, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16144, PETRI_PLACES=383, PETRI_TRANSITIONS=632} [2024-06-28 00:41:52,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-28 00:41:52,422 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 632 transitions, 16144 flow [2024-06-28 00:41:52,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:41:52,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:41:52,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:41:52,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 00:41:52,422 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:41:52,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:41:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1446782598, now seen corresponding path program 2 times [2024-06-28 00:41:52,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:41:52,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612790015] [2024-06-28 00:41:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:41:52,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:41:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:41:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:41:57,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:41:57,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612790015] [2024-06-28 00:41:57,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612790015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:41:57,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:41:57,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:41:57,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848671150] [2024-06-28 00:41:57,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:41:57,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:41:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:41:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:41:57,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:41:57,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:41:57,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 632 transitions, 16144 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:41:57,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:41:57,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:41:57,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:41:59,752 INFO L124 PetriNetUnfolderBase]: 3133/5195 cut-off events. [2024-06-28 00:41:59,752 INFO L125 PetriNetUnfolderBase]: For 839785/839785 co-relation queries the response was YES. [2024-06-28 00:41:59,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71986 conditions, 5195 events. 3133/5195 cut-off events. For 839785/839785 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 33274 event pairs, 615 based on Foata normal form. 2/5197 useless extension candidates. Maximal degree in co-relation 71813. Up to 4708 conditions per place. [2024-06-28 00:41:59,836 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 542 selfloop transitions, 116 changer transitions 0/663 dead transitions. [2024-06-28 00:41:59,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 663 transitions, 17558 flow [2024-06-28 00:41:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:41:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:41:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 00:41:59,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-28 00:41:59,838 INFO L175 Difference]: Start difference. First operand has 383 places, 632 transitions, 16144 flow. Second operand 9 states and 160 transitions. [2024-06-28 00:41:59,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 663 transitions, 17558 flow [2024-06-28 00:42:02,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 663 transitions, 17184 flow, removed 120 selfloop flow, removed 4 redundant places. [2024-06-28 00:42:02,348 INFO L231 Difference]: Finished difference. Result has 388 places, 632 transitions, 16021 flow [2024-06-28 00:42:02,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15774, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16021, PETRI_PLACES=388, PETRI_TRANSITIONS=632} [2024-06-28 00:42:02,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-28 00:42:02,349 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 632 transitions, 16021 flow [2024-06-28 00:42:02,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:02,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:02,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:02,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 00:42:02,350 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:02,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1457258118, now seen corresponding path program 3 times [2024-06-28 00:42:02,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:02,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316722088] [2024-06-28 00:42:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:02,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:06,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:06,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316722088] [2024-06-28 00:42:06,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316722088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:06,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:06,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:42:06,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181379386] [2024-06-28 00:42:06,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:06,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:42:06,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:06,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:42:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:42:06,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:06,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 632 transitions, 16021 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:06,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:06,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:06,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:09,193 INFO L124 PetriNetUnfolderBase]: 3138/5204 cut-off events. [2024-06-28 00:42:09,193 INFO L125 PetriNetUnfolderBase]: For 848511/848511 co-relation queries the response was YES. [2024-06-28 00:42:09,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72261 conditions, 5204 events. 3138/5204 cut-off events. For 848511/848511 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 33265 event pairs, 613 based on Foata normal form. 1/5205 useless extension candidates. Maximal degree in co-relation 72087. Up to 4681 conditions per place. [2024-06-28 00:42:09,426 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 522 selfloop transitions, 140 changer transitions 0/667 dead transitions. [2024-06-28 00:42:09,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 667 transitions, 17633 flow [2024-06-28 00:42:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-28 00:42:09,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-28 00:42:09,428 INFO L175 Difference]: Start difference. First operand has 388 places, 632 transitions, 16021 flow. Second operand 10 states and 173 transitions. [2024-06-28 00:42:09,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 667 transitions, 17633 flow [2024-06-28 00:42:12,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 667 transitions, 17244 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-28 00:42:12,163 INFO L231 Difference]: Finished difference. Result has 391 places, 635 transitions, 16121 flow [2024-06-28 00:42:12,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15632, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16121, PETRI_PLACES=391, PETRI_TRANSITIONS=635} [2024-06-28 00:42:12,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-28 00:42:12,164 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 635 transitions, 16121 flow [2024-06-28 00:42:12,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:12,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:12,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:12,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 00:42:12,165 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:12,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash -639920511, now seen corresponding path program 1 times [2024-06-28 00:42:12,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:12,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318261383] [2024-06-28 00:42:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:15,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:15,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318261383] [2024-06-28 00:42:15,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318261383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:15,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:15,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:42:15,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003859297] [2024-06-28 00:42:15,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:15,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:42:15,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:15,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:42:15,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:42:15,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:15,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 635 transitions, 16121 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:15,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:15,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:15,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:17,819 INFO L124 PetriNetUnfolderBase]: 3195/5306 cut-off events. [2024-06-28 00:42:17,820 INFO L125 PetriNetUnfolderBase]: For 877188/877188 co-relation queries the response was YES. [2024-06-28 00:42:17,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73927 conditions, 5306 events. 3195/5306 cut-off events. For 877188/877188 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34016 event pairs, 474 based on Foata normal form. 2/5308 useless extension candidates. Maximal degree in co-relation 73752. Up to 3641 conditions per place. [2024-06-28 00:42:17,919 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 415 selfloop transitions, 289 changer transitions 0/709 dead transitions. [2024-06-28 00:42:17,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 709 transitions, 18829 flow [2024-06-28 00:42:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:42:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:42:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 208 transitions. [2024-06-28 00:42:17,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-28 00:42:17,920 INFO L175 Difference]: Start difference. First operand has 391 places, 635 transitions, 16121 flow. Second operand 12 states and 208 transitions. [2024-06-28 00:42:17,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 709 transitions, 18829 flow [2024-06-28 00:42:20,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 709 transitions, 18376 flow, removed 91 selfloop flow, removed 8 redundant places. [2024-06-28 00:42:20,667 INFO L231 Difference]: Finished difference. Result has 397 places, 667 transitions, 17549 flow [2024-06-28 00:42:20,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15668, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17549, PETRI_PLACES=397, PETRI_TRANSITIONS=667} [2024-06-28 00:42:20,668 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-28 00:42:20,668 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 667 transitions, 17549 flow [2024-06-28 00:42:20,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:20,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:20,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:20,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 00:42:20,669 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:20,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:20,669 INFO L85 PathProgramCache]: Analyzing trace with hash -639920666, now seen corresponding path program 1 times [2024-06-28 00:42:20,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:20,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640509025] [2024-06-28 00:42:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:20,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:24,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:24,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640509025] [2024-06-28 00:42:24,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640509025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:24,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:24,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:42:24,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219071516] [2024-06-28 00:42:24,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:24,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:42:24,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:24,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:42:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:42:24,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:24,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 667 transitions, 17549 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:42:24,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:24,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:24,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:27,022 INFO L124 PetriNetUnfolderBase]: 3205/5318 cut-off events. [2024-06-28 00:42:27,022 INFO L125 PetriNetUnfolderBase]: For 943853/943853 co-relation queries the response was YES. [2024-06-28 00:42:27,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76732 conditions, 5318 events. 3205/5318 cut-off events. For 943853/943853 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34155 event pairs, 705 based on Foata normal form. 2/5320 useless extension candidates. Maximal degree in co-relation 76555. Up to 4850 conditions per place. [2024-06-28 00:42:27,116 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 633 selfloop transitions, 85 changer transitions 0/723 dead transitions. [2024-06-28 00:42:27,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 723 transitions, 19455 flow [2024-06-28 00:42:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:42:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:42:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 230 transitions. [2024-06-28 00:42:27,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-28 00:42:27,118 INFO L175 Difference]: Start difference. First operand has 397 places, 667 transitions, 17549 flow. Second operand 14 states and 230 transitions. [2024-06-28 00:42:27,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 723 transitions, 19455 flow [2024-06-28 00:42:30,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 723 transitions, 18878 flow, removed 267 selfloop flow, removed 5 redundant places. [2024-06-28 00:42:30,085 INFO L231 Difference]: Finished difference. Result has 406 places, 671 transitions, 17308 flow [2024-06-28 00:42:30,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16972, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17308, PETRI_PLACES=406, PETRI_TRANSITIONS=671} [2024-06-28 00:42:30,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-28 00:42:30,086 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 671 transitions, 17308 flow [2024-06-28 00:42:30,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:42:30,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:30,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:30,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 00:42:30,087 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:30,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1457270797, now seen corresponding path program 2 times [2024-06-28 00:42:30,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:30,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729554086] [2024-06-28 00:42:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:30,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:33,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:33,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729554086] [2024-06-28 00:42:33,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729554086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:33,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:33,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:42:33,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436335701] [2024-06-28 00:42:33,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:33,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:42:33,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:42:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:42:33,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:33,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 671 transitions, 17308 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:33,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:33,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:33,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:35,539 INFO L124 PetriNetUnfolderBase]: 3195/5298 cut-off events. [2024-06-28 00:42:35,540 INFO L125 PetriNetUnfolderBase]: For 952666/952666 co-relation queries the response was YES. [2024-06-28 00:42:35,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77022 conditions, 5298 events. 3195/5298 cut-off events. For 952666/952666 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33903 event pairs, 473 based on Foata normal form. 2/5300 useless extension candidates. Maximal degree in co-relation 76842. Up to 3686 conditions per place. [2024-06-28 00:42:35,631 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 417 selfloop transitions, 276 changer transitions 0/698 dead transitions. [2024-06-28 00:42:35,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 698 transitions, 18899 flow [2024-06-28 00:42:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 00:42:35,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-28 00:42:35,633 INFO L175 Difference]: Start difference. First operand has 406 places, 671 transitions, 17308 flow. Second operand 10 states and 182 transitions. [2024-06-28 00:42:35,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 698 transitions, 18899 flow [2024-06-28 00:42:38,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 698 transitions, 18642 flow, removed 75 selfloop flow, removed 9 redundant places. [2024-06-28 00:42:38,881 INFO L231 Difference]: Finished difference. Result has 405 places, 655 transitions, 17584 flow [2024-06-28 00:42:38,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16754, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17584, PETRI_PLACES=405, PETRI_TRANSITIONS=655} [2024-06-28 00:42:38,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-28 00:42:38,882 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 655 transitions, 17584 flow [2024-06-28 00:42:38,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:38,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:38,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:38,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 00:42:38,883 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:38,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1634234808, now seen corresponding path program 1 times [2024-06-28 00:42:38,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:38,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430941104] [2024-06-28 00:42:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:38,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:43,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430941104] [2024-06-28 00:42:43,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430941104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:43,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:43,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:42:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505203781] [2024-06-28 00:42:43,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:43,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:42:43,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:43,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:42:43,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:42:43,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:43,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 655 transitions, 17584 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:43,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:43,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:43,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:46,181 INFO L124 PetriNetUnfolderBase]: 3179/5270 cut-off events. [2024-06-28 00:42:46,181 INFO L125 PetriNetUnfolderBase]: For 979216/979216 co-relation queries the response was YES. [2024-06-28 00:42:46,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77695 conditions, 5270 events. 3179/5270 cut-off events. For 979216/979216 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33833 event pairs, 695 based on Foata normal form. 8/5278 useless extension candidates. Maximal degree in co-relation 77515. Up to 4901 conditions per place. [2024-06-28 00:42:46,272 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 616 selfloop transitions, 64 changer transitions 0/685 dead transitions. [2024-06-28 00:42:46,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 685 transitions, 19132 flow [2024-06-28 00:42:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:42:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:42:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-28 00:42:46,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-28 00:42:46,275 INFO L175 Difference]: Start difference. First operand has 405 places, 655 transitions, 17584 flow. Second operand 10 states and 163 transitions. [2024-06-28 00:42:46,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 685 transitions, 19132 flow [2024-06-28 00:42:49,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 685 transitions, 18895 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-28 00:42:49,124 INFO L231 Difference]: Finished difference. Result has 408 places, 657 transitions, 17559 flow [2024-06-28 00:42:49,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17347, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17559, PETRI_PLACES=408, PETRI_TRANSITIONS=657} [2024-06-28 00:42:49,125 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-28 00:42:49,126 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 657 transitions, 17559 flow [2024-06-28 00:42:49,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:49,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:49,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:49,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 00:42:49,126 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:49,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 563813670, now seen corresponding path program 2 times [2024-06-28 00:42:49,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:49,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881469240] [2024-06-28 00:42:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:42:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:42:53,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:42:53,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881469240] [2024-06-28 00:42:53,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881469240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:42:53,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:42:53,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:42:53,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716920483] [2024-06-28 00:42:53,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:42:53,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:42:53,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:42:53,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:42:53,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:42:53,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:42:53,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 657 transitions, 17559 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:53,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:42:53,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:42:53,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:42:56,637 INFO L124 PetriNetUnfolderBase]: 3177/5273 cut-off events. [2024-06-28 00:42:56,638 INFO L125 PetriNetUnfolderBase]: For 998883/998883 co-relation queries the response was YES. [2024-06-28 00:42:56,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77918 conditions, 5273 events. 3177/5273 cut-off events. For 998883/998883 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 33880 event pairs, 706 based on Foata normal form. 6/5279 useless extension candidates. Maximal degree in co-relation 77734. Up to 4840 conditions per place. [2024-06-28 00:42:56,722 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 611 selfloop transitions, 86 changer transitions 0/702 dead transitions. [2024-06-28 00:42:56,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 702 transitions, 19495 flow [2024-06-28 00:42:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:42:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:42:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-28 00:42:56,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.374031007751938 [2024-06-28 00:42:56,724 INFO L175 Difference]: Start difference. First operand has 408 places, 657 transitions, 17559 flow. Second operand 12 states and 193 transitions. [2024-06-28 00:42:56,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 702 transitions, 19495 flow [2024-06-28 00:42:59,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 702 transitions, 19311 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-28 00:42:59,490 INFO L231 Difference]: Finished difference. Result has 413 places, 665 transitions, 17900 flow [2024-06-28 00:42:59,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17375, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17900, PETRI_PLACES=413, PETRI_TRANSITIONS=665} [2024-06-28 00:42:59,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-28 00:42:59,491 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 665 transitions, 17900 flow [2024-06-28 00:42:59,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:42:59,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:42:59,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:42:59,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 00:42:59,492 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:42:59,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:42:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1872964358, now seen corresponding path program 4 times [2024-06-28 00:42:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:42:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246671140] [2024-06-28 00:42:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:42:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:42:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:03,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:03,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246671140] [2024-06-28 00:43:03,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246671140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:03,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:03,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:03,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767815113] [2024-06-28 00:43:03,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:03,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:03,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:03,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:43:03,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 665 transitions, 17900 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:43:03,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:03,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:43:03,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:06,263 INFO L124 PetriNetUnfolderBase]: 3164/5240 cut-off events. [2024-06-28 00:43:06,264 INFO L125 PetriNetUnfolderBase]: For 1002797/1002797 co-relation queries the response was YES. [2024-06-28 00:43:06,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78135 conditions, 5240 events. 3164/5240 cut-off events. For 1002797/1002797 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33473 event pairs, 614 based on Foata normal form. 1/5239 useless extension candidates. Maximal degree in co-relation 77949. Up to 4784 conditions per place. [2024-06-28 00:43:06,512 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 583 selfloop transitions, 103 changer transitions 0/691 dead transitions. [2024-06-28 00:43:06,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 691 transitions, 19364 flow [2024-06-28 00:43:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:43:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:43:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 00:43:06,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-28 00:43:06,513 INFO L175 Difference]: Start difference. First operand has 413 places, 665 transitions, 17900 flow. Second operand 9 states and 151 transitions. [2024-06-28 00:43:06,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 691 transitions, 19364 flow [2024-06-28 00:43:09,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 691 transitions, 19021 flow, removed 111 selfloop flow, removed 8 redundant places. [2024-06-28 00:43:09,130 INFO L231 Difference]: Finished difference. Result has 414 places, 665 transitions, 17773 flow [2024-06-28 00:43:09,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17557, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17773, PETRI_PLACES=414, PETRI_TRANSITIONS=665} [2024-06-28 00:43:09,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-28 00:43:09,131 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 665 transitions, 17773 flow [2024-06-28 00:43:09,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:43:09,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:09,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:09,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 00:43:09,131 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:09,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:09,132 INFO L85 PathProgramCache]: Analyzing trace with hash -503340730, now seen corresponding path program 5 times [2024-06-28 00:43:09,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:09,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002993571] [2024-06-28 00:43:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:09,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:13,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002993571] [2024-06-28 00:43:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002993571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:13,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:13,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:43:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871526392] [2024-06-28 00:43:13,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:13,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:43:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:43:13,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:43:13,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:43:13,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 665 transitions, 17773 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:13,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:13,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:43:13,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:16,184 INFO L124 PetriNetUnfolderBase]: 3174/5258 cut-off events. [2024-06-28 00:43:16,184 INFO L125 PetriNetUnfolderBase]: For 1006852/1006852 co-relation queries the response was YES. [2024-06-28 00:43:16,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78240 conditions, 5258 events. 3174/5258 cut-off events. For 1006852/1006852 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33676 event pairs, 614 based on Foata normal form. 1/5257 useless extension candidates. Maximal degree in co-relation 78054. Up to 4776 conditions per place. [2024-06-28 00:43:16,269 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 572 selfloop transitions, 121 changer transitions 0/698 dead transitions. [2024-06-28 00:43:16,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 698 transitions, 19509 flow [2024-06-28 00:43:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:43:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:43:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 00:43:16,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-28 00:43:16,271 INFO L175 Difference]: Start difference. First operand has 414 places, 665 transitions, 17773 flow. Second operand 9 states and 156 transitions. [2024-06-28 00:43:16,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 698 transitions, 19509 flow [2024-06-28 00:43:18,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 698 transitions, 19299 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 00:43:18,898 INFO L231 Difference]: Finished difference. Result has 416 places, 671 transitions, 18083 flow [2024-06-28 00:43:18,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17563, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18083, PETRI_PLACES=416, PETRI_TRANSITIONS=671} [2024-06-28 00:43:18,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-28 00:43:18,899 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 671 transitions, 18083 flow [2024-06-28 00:43:18,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:18,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:18,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:18,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 00:43:18,899 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:18,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:18,900 INFO L85 PathProgramCache]: Analyzing trace with hash -165910296, now seen corresponding path program 6 times [2024-06-28 00:43:18,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:18,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159068241] [2024-06-28 00:43:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:22,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:22,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159068241] [2024-06-28 00:43:22,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159068241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:22,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:22,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:43:22,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438983679] [2024-06-28 00:43:22,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:22,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:43:22,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:22,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:43:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:43:22,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:43:22,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 671 transitions, 18083 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:22,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:22,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:43:22,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:25,267 INFO L124 PetriNetUnfolderBase]: 3179/5265 cut-off events. [2024-06-28 00:43:25,267 INFO L125 PetriNetUnfolderBase]: For 1034158/1034158 co-relation queries the response was YES. [2024-06-28 00:43:25,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78963 conditions, 5265 events. 3179/5265 cut-off events. For 1034158/1034158 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33760 event pairs, 627 based on Foata normal form. 1/5263 useless extension candidates. Maximal degree in co-relation 78776. Up to 4664 conditions per place. [2024-06-28 00:43:25,370 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 558 selfloop transitions, 136 changer transitions 0/699 dead transitions. [2024-06-28 00:43:25,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 699 transitions, 19777 flow [2024-06-28 00:43:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:43:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:43:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 00:43:25,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 00:43:25,371 INFO L175 Difference]: Start difference. First operand has 416 places, 671 transitions, 18083 flow. Second operand 9 states and 153 transitions. [2024-06-28 00:43:25,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 699 transitions, 19777 flow [2024-06-28 00:43:28,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 699 transitions, 19363 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-28 00:43:28,759 INFO L231 Difference]: Finished difference. Result has 418 places, 674 transitions, 18171 flow [2024-06-28 00:43:28,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17669, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18171, PETRI_PLACES=418, PETRI_TRANSITIONS=674} [2024-06-28 00:43:28,760 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-28 00:43:28,760 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 674 transitions, 18171 flow [2024-06-28 00:43:28,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:28,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:28,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:28,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 00:43:28,760 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:28,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2002804404, now seen corresponding path program 7 times [2024-06-28 00:43:28,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:28,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650176149] [2024-06-28 00:43:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:28,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:34,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:34,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650176149] [2024-06-28 00:43:34,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650176149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:34,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:34,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:34,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308254054] [2024-06-28 00:43:34,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:34,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:34,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:34,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:43:34,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 674 transitions, 18171 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:43:34,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:34,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:43:34,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:37,489 INFO L124 PetriNetUnfolderBase]: 3176/5261 cut-off events. [2024-06-28 00:43:37,490 INFO L125 PetriNetUnfolderBase]: For 1051391/1051391 co-relation queries the response was YES. [2024-06-28 00:43:37,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79114 conditions, 5261 events. 3176/5261 cut-off events. For 1051391/1051391 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33731 event pairs, 627 based on Foata normal form. 1/5259 useless extension candidates. Maximal degree in co-relation 78926. Up to 4591 conditions per place. [2024-06-28 00:43:37,577 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 509 selfloop transitions, 189 changer transitions 0/703 dead transitions. [2024-06-28 00:43:37,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 703 transitions, 19881 flow [2024-06-28 00:43:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:43:37,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:43:37,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-28 00:43:37,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699788583509514 [2024-06-28 00:43:37,578 INFO L175 Difference]: Start difference. First operand has 418 places, 674 transitions, 18171 flow. Second operand 11 states and 175 transitions. [2024-06-28 00:43:37,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 703 transitions, 19881 flow [2024-06-28 00:43:40,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 703 transitions, 19427 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-28 00:43:40,612 INFO L231 Difference]: Finished difference. Result has 422 places, 677 transitions, 18335 flow [2024-06-28 00:43:40,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17717, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18335, PETRI_PLACES=422, PETRI_TRANSITIONS=677} [2024-06-28 00:43:40,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-28 00:43:40,613 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 677 transitions, 18335 flow [2024-06-28 00:43:40,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-28 00:43:40,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:40,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:40,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 00:43:40,613 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:40,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:40,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1411413676, now seen corresponding path program 2 times [2024-06-28 00:43:40,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:40,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573912691] [2024-06-28 00:43:40,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:40,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:44,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:44,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573912691] [2024-06-28 00:43:44,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573912691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:44,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:44,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:43:44,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148187830] [2024-06-28 00:43:44,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:44,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:43:44,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:43:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:43:44,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:43:44,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 677 transitions, 18335 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:43:44,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:44,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:43:44,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:47,007 INFO L124 PetriNetUnfolderBase]: 3206/5326 cut-off events. [2024-06-28 00:43:47,007 INFO L125 PetriNetUnfolderBase]: For 1082289/1082289 co-relation queries the response was YES. [2024-06-28 00:43:47,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80002 conditions, 5326 events. 3206/5326 cut-off events. For 1082289/1082289 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34381 event pairs, 414 based on Foata normal form. 2/5327 useless extension candidates. Maximal degree in co-relation 79813. Up to 3908 conditions per place. [2024-06-28 00:43:47,102 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 445 selfloop transitions, 283 changer transitions 0/733 dead transitions. [2024-06-28 00:43:47,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 733 transitions, 20380 flow [2024-06-28 00:43:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 00:43:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 00:43:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-28 00:43:47,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39728682170542634 [2024-06-28 00:43:47,103 INFO L175 Difference]: Start difference. First operand has 422 places, 677 transitions, 18335 flow. Second operand 12 states and 205 transitions. [2024-06-28 00:43:47,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 733 transitions, 20380 flow [2024-06-28 00:43:49,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 733 transitions, 19810 flow, removed 100 selfloop flow, removed 9 redundant places. [2024-06-28 00:43:49,959 INFO L231 Difference]: Finished difference. Result has 426 places, 689 transitions, 18883 flow [2024-06-28 00:43:49,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=17771, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18883, PETRI_PLACES=426, PETRI_TRANSITIONS=689} [2024-06-28 00:43:49,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-28 00:43:49,959 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 689 transitions, 18883 flow [2024-06-28 00:43:49,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:43:49,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:49,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:49,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 00:43:49,960 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:49,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1221167821, now seen corresponding path program 3 times [2024-06-28 00:43:49,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:49,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503715025] [2024-06-28 00:43:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:49,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:43:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:43:52,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:43:52,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503715025] [2024-06-28 00:43:52,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503715025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:43:52,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:43:52,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:43:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581535872] [2024-06-28 00:43:52,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:43:52,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:43:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:43:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:43:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:43:52,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:43:52,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 689 transitions, 18883 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:52,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:43:52,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:43:52,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:43:55,375 INFO L124 PetriNetUnfolderBase]: 3237/5361 cut-off events. [2024-06-28 00:43:55,375 INFO L125 PetriNetUnfolderBase]: For 1101320/1101320 co-relation queries the response was YES. [2024-06-28 00:43:55,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82246 conditions, 5361 events. 3237/5361 cut-off events. For 1101320/1101320 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 34300 event pairs, 481 based on Foata normal form. 2/5362 useless extension candidates. Maximal degree in co-relation 82055. Up to 3748 conditions per place. [2024-06-28 00:43:55,462 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 446 selfloop transitions, 279 changer transitions 0/730 dead transitions. [2024-06-28 00:43:55,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 730 transitions, 20945 flow [2024-06-28 00:43:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:43:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:43:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 00:43:55,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-28 00:43:55,464 INFO L175 Difference]: Start difference. First operand has 426 places, 689 transitions, 18883 flow. Second operand 8 states and 149 transitions. [2024-06-28 00:43:55,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 730 transitions, 20945 flow [2024-06-28 00:43:58,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 730 transitions, 20721 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-06-28 00:43:58,503 INFO L231 Difference]: Finished difference. Result has 427 places, 700 transitions, 19815 flow [2024-06-28 00:43:58,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18659, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19815, PETRI_PLACES=427, PETRI_TRANSITIONS=700} [2024-06-28 00:43:58,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-28 00:43:58,504 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 700 transitions, 19815 flow [2024-06-28 00:43:58,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:43:58,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:43:58,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:43:58,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 00:43:58,504 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:43:58,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:43:58,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1221162086, now seen corresponding path program 3 times [2024-06-28 00:43:58,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:43:58,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576982406] [2024-06-28 00:43:58,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:43:58,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:43:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:02,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:02,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576982406] [2024-06-28 00:44:02,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576982406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:02,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:02,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:44:02,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610497228] [2024-06-28 00:44:02,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:02,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:44:02,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:02,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:44:02,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:44:02,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:44:02,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 700 transitions, 19815 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:44:02,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:02,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:44:02,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:04,687 INFO L124 PetriNetUnfolderBase]: 3247/5393 cut-off events. [2024-06-28 00:44:04,688 INFO L125 PetriNetUnfolderBase]: For 1164945/1164945 co-relation queries the response was YES. [2024-06-28 00:44:04,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84752 conditions, 5393 events. 3247/5393 cut-off events. For 1164945/1164945 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 34859 event pairs, 422 based on Foata normal form. 2/5394 useless extension candidates. Maximal degree in co-relation 84559. Up to 3899 conditions per place. [2024-06-28 00:44:04,780 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 451 selfloop transitions, 287 changer transitions 0/743 dead transitions. [2024-06-28 00:44:04,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 743 transitions, 21783 flow [2024-06-28 00:44:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:44:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:44:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-28 00:44:04,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-28 00:44:04,781 INFO L175 Difference]: Start difference. First operand has 427 places, 700 transitions, 19815 flow. Second operand 11 states and 187 transitions. [2024-06-28 00:44:04,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 743 transitions, 21783 flow [2024-06-28 00:44:07,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 743 transitions, 21663 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 00:44:07,882 INFO L231 Difference]: Finished difference. Result has 434 places, 704 transitions, 20464 flow [2024-06-28 00:44:07,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19695, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20464, PETRI_PLACES=434, PETRI_TRANSITIONS=704} [2024-06-28 00:44:07,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-28 00:44:07,883 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 704 transitions, 20464 flow [2024-06-28 00:44:07,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:44:07,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:07,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:07,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 00:44:07,883 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:07,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:07,883 INFO L85 PathProgramCache]: Analyzing trace with hash -243962849, now seen corresponding path program 4 times [2024-06-28 00:44:07,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:07,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606512084] [2024-06-28 00:44:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:07,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:11,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:11,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606512084] [2024-06-28 00:44:11,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606512084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:11,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:11,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:44:11,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472889008] [2024-06-28 00:44:11,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:11,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:44:11,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:44:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:44:11,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:44:11,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 704 transitions, 20464 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:11,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:11,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:44:11,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:13,623 INFO L124 PetriNetUnfolderBase]: 3286/5447 cut-off events. [2024-06-28 00:44:13,624 INFO L125 PetriNetUnfolderBase]: For 1219401/1219401 co-relation queries the response was YES. [2024-06-28 00:44:13,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87368 conditions, 5447 events. 3286/5447 cut-off events. For 1219401/1219401 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35184 event pairs, 417 based on Foata normal form. 2/5448 useless extension candidates. Maximal degree in co-relation 87172. Up to 3772 conditions per place. [2024-06-28 00:44:13,714 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 453 selfloop transitions, 289 changer transitions 0/747 dead transitions. [2024-06-28 00:44:13,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 747 transitions, 22528 flow [2024-06-28 00:44:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:44:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:44:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-28 00:44:13,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-28 00:44:13,716 INFO L175 Difference]: Start difference. First operand has 434 places, 704 transitions, 20464 flow. Second operand 8 states and 150 transitions. [2024-06-28 00:44:13,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 747 transitions, 22528 flow [2024-06-28 00:44:16,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 747 transitions, 22291 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-28 00:44:16,835 INFO L231 Difference]: Finished difference. Result has 436 places, 714 transitions, 21338 flow [2024-06-28 00:44:16,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20227, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21338, PETRI_PLACES=436, PETRI_TRANSITIONS=714} [2024-06-28 00:44:16,836 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-28 00:44:16,836 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 714 transitions, 21338 flow [2024-06-28 00:44:16,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:16,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:16,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 00:44:16,836 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:16,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash 100532401, now seen corresponding path program 5 times [2024-06-28 00:44:16,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:16,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726604013] [2024-06-28 00:44:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:16,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:20,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:20,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726604013] [2024-06-28 00:44:20,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726604013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:20,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:20,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:44:20,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272472013] [2024-06-28 00:44:20,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:20,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:44:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:20,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:44:20,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:44:20,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:44:20,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 714 transitions, 21338 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:20,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:20,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:44:20,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:23,325 INFO L124 PetriNetUnfolderBase]: 3456/5720 cut-off events. [2024-06-28 00:44:23,325 INFO L125 PetriNetUnfolderBase]: For 1395933/1395933 co-relation queries the response was YES. [2024-06-28 00:44:23,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96110 conditions, 5720 events. 3456/5720 cut-off events. For 1395933/1395933 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36954 event pairs, 706 based on Foata normal form. 1/5721 useless extension candidates. Maximal degree in co-relation 95912. Up to 3735 conditions per place. [2024-06-28 00:44:23,434 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 491 selfloop transitions, 270 changer transitions 0/766 dead transitions. [2024-06-28 00:44:23,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 766 transitions, 24279 flow [2024-06-28 00:44:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:44:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:44:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-28 00:44:23,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-28 00:44:23,435 INFO L175 Difference]: Start difference. First operand has 436 places, 714 transitions, 21338 flow. Second operand 10 states and 163 transitions. [2024-06-28 00:44:23,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 766 transitions, 24279 flow [2024-06-28 00:44:27,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 766 transitions, 23875 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-28 00:44:27,327 INFO L231 Difference]: Finished difference. Result has 443 places, 737 transitions, 22600 flow [2024-06-28 00:44:27,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20946, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22600, PETRI_PLACES=443, PETRI_TRANSITIONS=737} [2024-06-28 00:44:27,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-28 00:44:27,328 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 737 transitions, 22600 flow [2024-06-28 00:44:27,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:27,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:27,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:27,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 00:44:27,329 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:27,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash 247676173, now seen corresponding path program 6 times [2024-06-28 00:44:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:27,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293143235] [2024-06-28 00:44:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:27,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:31,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:31,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293143235] [2024-06-28 00:44:31,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293143235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:31,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:31,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:44:31,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148089756] [2024-06-28 00:44:31,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:44:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:44:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:44:31,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:44:31,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 737 transitions, 22600 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:31,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:31,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:44:31,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:33,986 INFO L124 PetriNetUnfolderBase]: 3461/5740 cut-off events. [2024-06-28 00:44:33,987 INFO L125 PetriNetUnfolderBase]: For 1441794/1441794 co-relation queries the response was YES. [2024-06-28 00:44:34,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98155 conditions, 5740 events. 3461/5740 cut-off events. For 1441794/1441794 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37294 event pairs, 834 based on Foata normal form. 1/5741 useless extension candidates. Maximal degree in co-relation 97953. Up to 4271 conditions per place. [2024-06-28 00:44:34,098 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 466 selfloop transitions, 297 changer transitions 0/768 dead transitions. [2024-06-28 00:44:34,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 768 transitions, 24742 flow [2024-06-28 00:44:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:44:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:44:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 00:44:34,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-28 00:44:34,100 INFO L175 Difference]: Start difference. First operand has 443 places, 737 transitions, 22600 flow. Second operand 10 states and 166 transitions. [2024-06-28 00:44:34,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 768 transitions, 24742 flow [2024-06-28 00:44:38,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 768 transitions, 24632 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-28 00:44:38,761 INFO L231 Difference]: Finished difference. Result has 450 places, 742 transitions, 23330 flow [2024-06-28 00:44:38,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=22496, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23330, PETRI_PLACES=450, PETRI_TRANSITIONS=742} [2024-06-28 00:44:38,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 406 predicate places. [2024-06-28 00:44:38,762 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 742 transitions, 23330 flow [2024-06-28 00:44:38,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:38,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:38,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:38,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 00:44:38,763 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:38,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:38,764 INFO L85 PathProgramCache]: Analyzing trace with hash 233593958, now seen corresponding path program 4 times [2024-06-28 00:44:38,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:38,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264341075] [2024-06-28 00:44:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:38,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:42,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:42,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264341075] [2024-06-28 00:44:42,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264341075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:42,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:42,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:44:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683808374] [2024-06-28 00:44:42,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:44:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:44:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:44:42,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:44:42,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 742 transitions, 23330 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:42,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:42,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:44:42,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:45,552 INFO L124 PetriNetUnfolderBase]: 3466/5735 cut-off events. [2024-06-28 00:44:45,552 INFO L125 PetriNetUnfolderBase]: For 1482623/1482623 co-relation queries the response was YES. [2024-06-28 00:44:45,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100096 conditions, 5735 events. 3466/5735 cut-off events. For 1482623/1482623 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36976 event pairs, 592 based on Foata normal form. 1/5735 useless extension candidates. Maximal degree in co-relation 99891. Up to 4462 conditions per place. [2024-06-28 00:44:45,663 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 538 selfloop transitions, 233 changer transitions 0/776 dead transitions. [2024-06-28 00:44:45,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 776 transitions, 25633 flow [2024-06-28 00:44:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:44:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:44:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-28 00:44:45,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-28 00:44:45,664 INFO L175 Difference]: Start difference. First operand has 450 places, 742 transitions, 23330 flow. Second operand 10 states and 162 transitions. [2024-06-28 00:44:45,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 776 transitions, 25633 flow [2024-06-28 00:44:49,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 776 transitions, 25543 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 00:44:49,998 INFO L231 Difference]: Finished difference. Result has 455 places, 751 transitions, 24392 flow [2024-06-28 00:44:49,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=23242, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24392, PETRI_PLACES=455, PETRI_TRANSITIONS=751} [2024-06-28 00:44:49,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-28 00:44:49,998 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 751 transitions, 24392 flow [2024-06-28 00:44:49,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:49,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:44:49,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:44:49,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 00:44:49,999 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:44:50,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:44:50,000 INFO L85 PathProgramCache]: Analyzing trace with hash 233599693, now seen corresponding path program 7 times [2024-06-28 00:44:50,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:44:50,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354256477] [2024-06-28 00:44:50,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:44:50,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:44:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:44:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:44:53,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:44:53,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354256477] [2024-06-28 00:44:53,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354256477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:44:53,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:44:53,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:44:53,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856978091] [2024-06-28 00:44:53,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:44:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:44:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:44:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:44:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:44:53,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:44:53,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 751 transitions, 24392 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:44:53,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:44:53,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:44:53,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:44:56,824 INFO L124 PetriNetUnfolderBase]: 3533/5843 cut-off events. [2024-06-28 00:44:56,825 INFO L125 PetriNetUnfolderBase]: For 1565580/1565580 co-relation queries the response was YES. [2024-06-28 00:44:56,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103558 conditions, 5843 events. 3533/5843 cut-off events. For 1565580/1565580 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37801 event pairs, 768 based on Foata normal form. 4/5846 useless extension candidates. Maximal degree in co-relation 103351. Up to 5104 conditions per place. [2024-06-28 00:44:56,942 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 645 selfloop transitions, 174 changer transitions 0/824 dead transitions. [2024-06-28 00:44:56,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 824 transitions, 27605 flow [2024-06-28 00:44:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-28 00:44:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-28 00:44:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 244 transitions. [2024-06-28 00:44:56,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-28 00:44:56,945 INFO L175 Difference]: Start difference. First operand has 455 places, 751 transitions, 24392 flow. Second operand 14 states and 244 transitions. [2024-06-28 00:44:56,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 824 transitions, 27605 flow [2024-06-28 00:45:01,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 824 transitions, 27359 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-28 00:45:01,989 INFO L231 Difference]: Finished difference. Result has 464 places, 772 transitions, 25399 flow [2024-06-28 00:45:01,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24146, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=25399, PETRI_PLACES=464, PETRI_TRANSITIONS=772} [2024-06-28 00:45:01,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2024-06-28 00:45:01,990 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 772 transitions, 25399 flow [2024-06-28 00:45:01,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:01,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:01,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:01,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 00:45:01,990 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:01,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:01,991 INFO L85 PathProgramCache]: Analyzing trace with hash 233594113, now seen corresponding path program 8 times [2024-06-28 00:45:01,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:01,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231748034] [2024-06-28 00:45:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:01,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:05,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:05,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231748034] [2024-06-28 00:45:05,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231748034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:05,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:05,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:45:05,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862428071] [2024-06-28 00:45:05,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:05,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:45:05,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:45:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:45:05,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:45:05,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 772 transitions, 25399 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:05,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:05,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:45:05,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:08,497 INFO L124 PetriNetUnfolderBase]: 3546/5865 cut-off events. [2024-06-28 00:45:08,497 INFO L125 PetriNetUnfolderBase]: For 1583887/1583887 co-relation queries the response was YES. [2024-06-28 00:45:08,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105336 conditions, 5865 events. 3546/5865 cut-off events. For 1583887/1583887 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37897 event pairs, 521 based on Foata normal form. 1/5865 useless extension candidates. Maximal degree in co-relation 105125. Up to 4140 conditions per place. [2024-06-28 00:45:08,605 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 469 selfloop transitions, 331 changer transitions 0/805 dead transitions. [2024-06-28 00:45:08,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 805 transitions, 27615 flow [2024-06-28 00:45:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:45:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:45:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 00:45:08,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-28 00:45:08,606 INFO L175 Difference]: Start difference. First operand has 464 places, 772 transitions, 25399 flow. Second operand 8 states and 147 transitions. [2024-06-28 00:45:08,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 805 transitions, 27615 flow [2024-06-28 00:45:13,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 805 transitions, 27055 flow, removed 230 selfloop flow, removed 7 redundant places. [2024-06-28 00:45:13,355 INFO L231 Difference]: Finished difference. Result has 466 places, 780 transitions, 26153 flow [2024-06-28 00:45:13,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=24853, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=26153, PETRI_PLACES=466, PETRI_TRANSITIONS=780} [2024-06-28 00:45:13,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-28 00:45:13,356 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 780 transitions, 26153 flow [2024-06-28 00:45:13,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:13,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:13,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:13,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 00:45:13,356 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:13,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash 241868168, now seen corresponding path program 5 times [2024-06-28 00:45:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:13,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016031355] [2024-06-28 00:45:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:13,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:17,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:17,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016031355] [2024-06-28 00:45:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016031355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:17,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:17,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:45:17,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001886098] [2024-06-28 00:45:17,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:17,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:45:17,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:17,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:45:17,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:45:17,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:45:17,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 780 transitions, 26153 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:45:17,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:17,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:45:17,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:20,260 INFO L124 PetriNetUnfolderBase]: 3551/5867 cut-off events. [2024-06-28 00:45:20,260 INFO L125 PetriNetUnfolderBase]: For 1634867/1634867 co-relation queries the response was YES. [2024-06-28 00:45:20,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107147 conditions, 5867 events. 3551/5867 cut-off events. For 1634867/1634867 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37876 event pairs, 537 based on Foata normal form. 1/5867 useless extension candidates. Maximal degree in co-relation 106935. Up to 4273 conditions per place. [2024-06-28 00:45:20,375 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 461 selfloop transitions, 347 changer transitions 0/813 dead transitions. [2024-06-28 00:45:20,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 813 transitions, 28207 flow [2024-06-28 00:45:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:45:20,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:45:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-28 00:45:20,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37420718816067655 [2024-06-28 00:45:20,377 INFO L175 Difference]: Start difference. First operand has 466 places, 780 transitions, 26153 flow. Second operand 11 states and 177 transitions. [2024-06-28 00:45:20,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 813 transitions, 28207 flow [2024-06-28 00:45:25,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 813 transitions, 28098 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-28 00:45:25,513 INFO L231 Difference]: Finished difference. Result has 475 places, 783 transitions, 26900 flow [2024-06-28 00:45:25,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=26044, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=26900, PETRI_PLACES=475, PETRI_TRANSITIONS=783} [2024-06-28 00:45:25,514 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 431 predicate places. [2024-06-28 00:45:25,514 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 783 transitions, 26900 flow [2024-06-28 00:45:25,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-28 00:45:25,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:25,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:25,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 00:45:25,515 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:25,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:25,515 INFO L85 PathProgramCache]: Analyzing trace with hash 242164838, now seen corresponding path program 6 times [2024-06-28 00:45:25,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:25,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262518033] [2024-06-28 00:45:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:25,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:29,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:29,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262518033] [2024-06-28 00:45:29,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262518033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:29,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:29,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:45:29,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856179114] [2024-06-28 00:45:29,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:29,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:45:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:45:29,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:45:29,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:45:29,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 783 transitions, 26900 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:29,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:29,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:45:29,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:33,180 INFO L124 PetriNetUnfolderBase]: 3548/5869 cut-off events. [2024-06-28 00:45:33,180 INFO L125 PetriNetUnfolderBase]: For 1693066/1693066 co-relation queries the response was YES. [2024-06-28 00:45:33,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108838 conditions, 5869 events. 3548/5869 cut-off events. For 1693066/1693066 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 38133 event pairs, 773 based on Foata normal form. 1/5869 useless extension candidates. Maximal degree in co-relation 108623. Up to 5224 conditions per place. [2024-06-28 00:45:33,300 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 653 selfloop transitions, 152 changer transitions 0/810 dead transitions. [2024-06-28 00:45:33,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 810 transitions, 28752 flow [2024-06-28 00:45:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:45:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:45:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-28 00:45:33,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-28 00:45:33,301 INFO L175 Difference]: Start difference. First operand has 475 places, 783 transitions, 26900 flow. Second operand 11 states and 176 transitions. [2024-06-28 00:45:33,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 810 transitions, 28752 flow [2024-06-28 00:45:39,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 810 transitions, 28543 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-28 00:45:39,076 INFO L231 Difference]: Finished difference. Result has 480 places, 786 transitions, 27163 flow [2024-06-28 00:45:39,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=26691, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=27163, PETRI_PLACES=480, PETRI_TRANSITIONS=786} [2024-06-28 00:45:39,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-28 00:45:39,077 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 786 transitions, 27163 flow [2024-06-28 00:45:39,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:39,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:39,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:39,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 00:45:39,078 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:39,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash 242313793, now seen corresponding path program 9 times [2024-06-28 00:45:39,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:39,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102994591] [2024-06-28 00:45:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:39,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:43,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:43,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102994591] [2024-06-28 00:45:43,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102994591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:43,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:43,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:45:43,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043027978] [2024-06-28 00:45:43,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:43,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:45:43,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:43,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:45:43,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:45:43,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:45:43,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 786 transitions, 27163 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:43,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:43,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:45:43,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:46,959 INFO L124 PetriNetUnfolderBase]: 3545/5867 cut-off events. [2024-06-28 00:45:46,959 INFO L125 PetriNetUnfolderBase]: For 1727476/1727476 co-relation queries the response was YES. [2024-06-28 00:45:47,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109324 conditions, 5867 events. 3545/5867 cut-off events. For 1727476/1727476 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 38226 event pairs, 1169 based on Foata normal form. 1/5868 useless extension candidates. Maximal degree in co-relation 109107. Up to 5555 conditions per place. [2024-06-28 00:45:47,072 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 768 selfloop transitions, 32 changer transitions 0/805 dead transitions. [2024-06-28 00:45:47,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 805 transitions, 28823 flow [2024-06-28 00:45:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:45:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:45:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 162 transitions. [2024-06-28 00:45:47,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34249471458773784 [2024-06-28 00:45:47,074 INFO L175 Difference]: Start difference. First operand has 480 places, 786 transitions, 27163 flow. Second operand 11 states and 162 transitions. [2024-06-28 00:45:47,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 805 transitions, 28823 flow [2024-06-28 00:45:51,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 805 transitions, 28424 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-28 00:45:51,422 INFO L231 Difference]: Finished difference. Result has 484 places, 786 transitions, 26834 flow [2024-06-28 00:45:51,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=26764, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=26834, PETRI_PLACES=484, PETRI_TRANSITIONS=786} [2024-06-28 00:45:51,423 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-28 00:45:51,423 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 786 transitions, 26834 flow [2024-06-28 00:45:51,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:51,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:45:51,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:45:51,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 00:45:51,424 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:45:51,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:45:51,424 INFO L85 PathProgramCache]: Analyzing trace with hash 241868323, now seen corresponding path program 10 times [2024-06-28 00:45:51,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:45:51,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610275888] [2024-06-28 00:45:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:45:51,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:45:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:45:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:45:54,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:45:54,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610275888] [2024-06-28 00:45:54,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610275888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:45:54,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:45:54,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:45:54,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911982928] [2024-06-28 00:45:54,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:45:54,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:45:54,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:45:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:45:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:45:54,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:45:54,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 786 transitions, 26834 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:45:54,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:45:54,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:45:54,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:45:58,014 INFO L124 PetriNetUnfolderBase]: 3550/5874 cut-off events. [2024-06-28 00:45:58,015 INFO L125 PetriNetUnfolderBase]: For 1720805/1720805 co-relation queries the response was YES. [2024-06-28 00:45:58,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109291 conditions, 5874 events. 3550/5874 cut-off events. For 1720805/1720805 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37977 event pairs, 524 based on Foata normal form. 1/5874 useless extension candidates. Maximal degree in co-relation 109073. Up to 3951 conditions per place. [2024-06-28 00:45:58,392 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 424 selfloop transitions, 396 changer transitions 0/825 dead transitions. [2024-06-28 00:45:58,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 825 transitions, 29222 flow [2024-06-28 00:45:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:45:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:45:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-28 00:45:58,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-28 00:45:58,393 INFO L175 Difference]: Start difference. First operand has 484 places, 786 transitions, 26834 flow. Second operand 11 states and 186 transitions. [2024-06-28 00:45:58,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 825 transitions, 29222 flow [2024-06-28 00:46:03,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 825 transitions, 29081 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-28 00:46:03,687 INFO L231 Difference]: Finished difference. Result has 486 places, 793 transitions, 27862 flow [2024-06-28 00:46:03,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=26693, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=27862, PETRI_PLACES=486, PETRI_TRANSITIONS=793} [2024-06-28 00:46:03,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 442 predicate places. [2024-06-28 00:46:03,688 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 793 transitions, 27862 flow [2024-06-28 00:46:03,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:03,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:03,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:03,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 00:46:03,688 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:03,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:03,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1881542018, now seen corresponding path program 3 times [2024-06-28 00:46:03,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:03,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568226314] [2024-06-28 00:46:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:03,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:08,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:08,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568226314] [2024-06-28 00:46:08,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568226314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:08,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:08,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 00:46:08,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620454195] [2024-06-28 00:46:08,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 00:46:08,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 00:46:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 00:46:08,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:46:08,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 793 transitions, 27862 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:08,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:08,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:46:08,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:46:11,238 INFO L124 PetriNetUnfolderBase]: 3554/5874 cut-off events. [2024-06-28 00:46:11,238 INFO L125 PetriNetUnfolderBase]: For 1794289/1794289 co-relation queries the response was YES. [2024-06-28 00:46:11,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111693 conditions, 5874 events. 3554/5874 cut-off events. For 1794289/1794289 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 38023 event pairs, 711 based on Foata normal form. 3/5875 useless extension candidates. Maximal degree in co-relation 111473. Up to 5090 conditions per place. [2024-06-28 00:46:11,348 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 634 selfloop transitions, 179 changer transitions 0/818 dead transitions. [2024-06-28 00:46:11,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 818 transitions, 30412 flow [2024-06-28 00:46:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:46:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:46:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-28 00:46:11,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-28 00:46:11,350 INFO L175 Difference]: Start difference. First operand has 486 places, 793 transitions, 27862 flow. Second operand 10 states and 156 transitions. [2024-06-28 00:46:11,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 818 transitions, 30412 flow [2024-06-28 00:46:17,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 818 transitions, 28744 flow, removed 198 selfloop flow, removed 10 redundant places. [2024-06-28 00:46:17,408 INFO L231 Difference]: Finished difference. Result has 487 places, 800 transitions, 27096 flow [2024-06-28 00:46:17,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=26214, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=27096, PETRI_PLACES=487, PETRI_TRANSITIONS=800} [2024-06-28 00:46:17,408 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-28 00:46:17,409 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 800 transitions, 27096 flow [2024-06-28 00:46:17,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:17,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:46:17,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:46:17,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 00:46:17,409 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:46:17,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:46:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1684659110, now seen corresponding path program 4 times [2024-06-28 00:46:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:46:17,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846518665] [2024-06-28 00:46:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:46:17,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:46:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:46:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:46:22,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:46:22,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846518665] [2024-06-28 00:46:22,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846518665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:46:22,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:46:22,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:46:22,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829722607] [2024-06-28 00:46:22,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:46:22,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:46:22,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:46:22,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:46:22,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:46:22,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-28 00:46:22,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 800 transitions, 27096 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:46:22,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:46:22,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-28 00:46:22,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand