./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 19:48:05,549 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:48:05,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:48:05,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:48:05,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:48:05,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:48:05,619 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:48:05,619 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:48:05,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:48:05,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:48:05,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:48:05,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:48:05,621 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:48:05,621 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:48:05,622 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:48:05,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:48:05,622 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:48:05,622 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:48:05,623 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:48:05,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:48:05,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:48:05,636 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:48:05,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:48:05,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:48:05,636 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:48:05,637 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:48:05,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:48:05,637 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:48:05,637 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:48:05,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:48:05,637 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:48:05,637 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:48:05,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:48:05,638 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:48:05,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:48:05,638 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:48:05,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:48:05,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:48:05,638 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:48:05,638 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:48:05,639 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:48:05,640 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:48:05,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:48:05,640 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:48:05,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:48:05,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:48:05,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:48:05,850 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:48:05,851 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:48:05,852 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe028_rmo.yml/witness.yml [2024-06-21 19:48:05,954 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:48:05,955 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:48:05,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-21 19:48:06,940 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:48:07,185 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:48:07,186 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-21 19:48:07,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c1840b1/9068c77f8e744ffca487c3a9d9404094/FLAG530009646 [2024-06-21 19:48:07,208 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c1840b1/9068c77f8e744ffca487c3a9d9404094 [2024-06-21 19:48:07,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:48:07,212 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:48:07,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:48:07,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:48:07,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:48:07,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:48:05" (1/2) ... [2024-06-21 19:48:07,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba1a26b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:48:07, skipping insertion in model container [2024-06-21 19:48:07,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:48:05" (1/2) ... [2024-06-21 19:48:07,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5597798e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:48:07, skipping insertion in model container [2024-06-21 19:48:07,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:48:07" (2/2) ... [2024-06-21 19:48:07,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba1a26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07, skipping insertion in model container [2024-06-21 19:48:07,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:48:07" (2/2) ... [2024-06-21 19:48:07,224 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:48:07,247 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:48:07,248 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-21 19:48:07,248 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-21 19:48:07,249 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p0_EAX) + (long long )x$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$read_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$flush_delayed) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$mem_tmp) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff0_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd2) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$r_buff1_thd3) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff0_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX$w_buff1_used) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )x$w_buff1_used >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice0 >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )weak$$choice2 >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-21 19:48:07,249 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:48:07,249 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-21 19:48:07,289 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:48:07,627 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:48:07,635 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:48:07,786 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:48:07,833 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:48:07,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07 WrapperNode [2024-06-21 19:48:07,834 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:48:07,835 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:48:07,835 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:48:07,835 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:48:07,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,865 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,899 INFO L138 Inliner]: procedures = 175, calls = 73, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 163 [2024-06-21 19:48:07,900 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:48:07,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:48:07,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:48:07,901 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:48:07,909 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,914 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,931 INFO L175 MemorySlicer]: Split 32 memory accesses to 2 slices as follows [2, 30]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-21 19:48:07,931 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,932 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,950 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,961 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,972 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:48:07,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:48:07,973 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:48:07,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:48:07,973 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (1/1) ... [2024-06-21 19:48:07,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:48:07,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:48:08,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 19:48:08,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 19:48:08,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 19:48:08,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 19:48:08,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 19:48:08,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 19:48:08,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:48:08,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:48:08,042 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:48:08,042 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:48:08,042 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:48:08,042 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:48:08,043 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 19:48:08,043 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 19:48:08,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:48:08,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 19:48:08,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:48:08,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:48:08,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:48:08,047 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:48:08,199 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:48:08,201 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:48:08,666 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:48:08,667 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:48:08,915 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:48:08,915 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:48:08,915 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:48:08 BoogieIcfgContainer [2024-06-21 19:48:08,915 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:48:08,917 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:48:08,917 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:48:08,919 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:48:08,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:48:05" (1/4) ... [2024-06-21 19:48:08,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744dd6a0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:48:08, skipping insertion in model container [2024-06-21 19:48:08,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:48:07" (2/4) ... [2024-06-21 19:48:08,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744dd6a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:48:08, skipping insertion in model container [2024-06-21 19:48:08,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:48:07" (3/4) ... [2024-06-21 19:48:08,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@744dd6a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:48:08, skipping insertion in model container [2024-06-21 19:48:08,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:48:08" (4/4) ... [2024-06-21 19:48:08,923 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_rmo.i [2024-06-21 19:48:08,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:48:08,936 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 19:48:08,936 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:48:08,990 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:48:09,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:48:09,049 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 19:48:09,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:48:09,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:48:09,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 19:48:09,066 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 19:48:09,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:48:09,105 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;@375ff533, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:48:09,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 19:48:09,110 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:48:09,110 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 19:48:09,110 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:48:09,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:09,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:48:09,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:09,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash 673374852, now seen corresponding path program 1 times [2024-06-21 19:48:09,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:09,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658722393] [2024-06-21 19:48:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:10,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:10,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658722393] [2024-06-21 19:48:10,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658722393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:10,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:10,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:48:10,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343227567] [2024-06-21 19:48:10,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:10,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:48:10,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:48:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:48:10,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:48:10,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:10,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:10,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:48:10,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:11,425 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-21 19:48:11,426 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 19:48:11,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7678 event pairs, 650 based on Foata normal form. 1/1556 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-21 19:48:11,438 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 19:48:11,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-21 19:48:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:48:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:48:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-21 19:48:11,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-21 19:48:11,449 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-21 19:48:11,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-21 19:48:11,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:48:11,455 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 19:48:11,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 19:48:11,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 19:48:11,459 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 19:48:11,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:11,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:11,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:11,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:48:11,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:11,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:11,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1426790781, now seen corresponding path program 1 times [2024-06-21 19:48:11,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:11,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320349946] [2024-06-21 19:48:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:11,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:12,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:12,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320349946] [2024-06-21 19:48:12,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320349946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:12,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:12,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:48:12,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729408099] [2024-06-21 19:48:12,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:12,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:48:12,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:12,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:48:12,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:48:12,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:48:12,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:12,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:12,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:48:12,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:13,221 INFO L124 PetriNetUnfolderBase]: 1154/1773 cut-off events. [2024-06-21 19:48:13,221 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-21 19:48:13,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4082 conditions, 1773 events. 1154/1773 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8315 event pairs, 649 based on Foata normal form. 3/1773 useless extension candidates. Maximal degree in co-relation 4070. Up to 1720 conditions per place. [2024-06-21 19:48:13,232 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 44 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 19:48:13,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 258 flow [2024-06-21 19:48:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:48:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:48:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-21 19:48:13,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 19:48:13,234 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 90 transitions. [2024-06-21 19:48:13,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 258 flow [2024-06-21 19:48:13,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:48:13,236 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 19:48:13,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 19:48:13,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 19:48:13,237 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 19:48:13,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:13,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:13,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:13,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:48:13,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:13,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1051332990, now seen corresponding path program 1 times [2024-06-21 19:48:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:13,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996146484] [2024-06-21 19:48:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:13,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:15,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996146484] [2024-06-21 19:48:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996146484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:15,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:15,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:48:15,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275129209] [2024-06-21 19:48:15,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:48:15,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:48:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:48:15,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:48:15,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:15,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:15,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:48:15,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:15,716 INFO L124 PetriNetUnfolderBase]: 1147/1764 cut-off events. [2024-06-21 19:48:15,717 INFO L125 PetriNetUnfolderBase]: For 991/991 co-relation queries the response was YES. [2024-06-21 19:48:15,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 1764 events. 1147/1764 cut-off events. For 991/991 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8290 event pairs, 519 based on Foata normal form. 4/1765 useless extension candidates. Maximal degree in co-relation 4522. Up to 1674 conditions per place. [2024-06-21 19:48:15,726 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-21 19:48:15,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 400 flow [2024-06-21 19:48:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:48:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:48:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-21 19:48:15,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-21 19:48:15,729 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 116 transitions. [2024-06-21 19:48:15,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 400 flow [2024-06-21 19:48:15,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 19:48:15,731 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 220 flow [2024-06-21 19:48:15,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-21 19:48:15,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 19:48:15,732 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 220 flow [2024-06-21 19:48:15,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:15,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:15,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:15,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:48:15,733 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:15,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1515405191, now seen corresponding path program 1 times [2024-06-21 19:48:15,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:15,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683179376] [2024-06-21 19:48:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:15,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:17,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:17,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683179376] [2024-06-21 19:48:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683179376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:17,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:17,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:48:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117553114] [2024-06-21 19:48:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:17,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:48:17,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:17,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:48:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:48:17,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:48:17,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:17,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:17,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:48:17,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:18,419 INFO L124 PetriNetUnfolderBase]: 1136/1747 cut-off events. [2024-06-21 19:48:18,419 INFO L125 PetriNetUnfolderBase]: For 2202/2202 co-relation queries the response was YES. [2024-06-21 19:48:18,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5211 conditions, 1747 events. 1136/1747 cut-off events. For 2202/2202 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8221 event pairs, 371 based on Foata normal form. 8/1752 useless extension candidates. Maximal degree in co-relation 5194. Up to 1607 conditions per place. [2024-06-21 19:48:18,429 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-21 19:48:18,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 492 flow [2024-06-21 19:48:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-21 19:48:18,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-21 19:48:18,433 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 220 flow. Second operand 6 states and 133 transitions. [2024-06-21 19:48:18,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 492 flow [2024-06-21 19:48:18,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 492 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 19:48:18,441 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 267 flow [2024-06-21 19:48:18,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 19:48:18,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 19:48:18,442 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 267 flow [2024-06-21 19:48:18,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:18,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:18,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:18,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:48:18,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:18,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:18,443 INFO L85 PathProgramCache]: Analyzing trace with hash 923630510, now seen corresponding path program 1 times [2024-06-21 19:48:18,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:18,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395378424] [2024-06-21 19:48:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:18,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:20,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:20,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395378424] [2024-06-21 19:48:20,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395378424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:20,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:20,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:48:20,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718435070] [2024-06-21 19:48:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:48:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:20,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:48:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:48:20,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:48:20,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:20,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:20,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:48:20,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:21,139 INFO L124 PetriNetUnfolderBase]: 1010/1620 cut-off events. [2024-06-21 19:48:21,139 INFO L125 PetriNetUnfolderBase]: For 3151/3160 co-relation queries the response was YES. [2024-06-21 19:48:21,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5207 conditions, 1620 events. 1010/1620 cut-off events. For 3151/3160 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7880 event pairs, 399 based on Foata normal form. 3/1616 useless extension candidates. Maximal degree in co-relation 5186. Up to 1487 conditions per place. [2024-06-21 19:48:21,149 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 49 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2024-06-21 19:48:21,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 485 flow [2024-06-21 19:48:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:48:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:48:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-21 19:48:21,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 19:48:21,153 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 267 flow. Second operand 5 states and 97 transitions. [2024-06-21 19:48:21,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 485 flow [2024-06-21 19:48:21,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 450 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:21,161 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 331 flow [2024-06-21 19:48:21,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-21 19:48:21,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 19:48:21,163 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 331 flow [2024-06-21 19:48:21,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:21,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:21,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:21,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:48:21,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:21,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1403565212, now seen corresponding path program 1 times [2024-06-21 19:48:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:21,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801405078] [2024-06-21 19:48:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:21,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:23,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:23,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801405078] [2024-06-21 19:48:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801405078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:23,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:23,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:48:23,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990871190] [2024-06-21 19:48:23,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:23,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:48:23,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:48:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:48:23,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:23,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:23,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:23,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:23,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:24,529 INFO L124 PetriNetUnfolderBase]: 1126/1733 cut-off events. [2024-06-21 19:48:24,530 INFO L125 PetriNetUnfolderBase]: For 4138/4138 co-relation queries the response was YES. [2024-06-21 19:48:24,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6077 conditions, 1733 events. 1126/1733 cut-off events. For 4138/4138 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8064 event pairs, 450 based on Foata normal form. 2/1732 useless extension candidates. Maximal degree in co-relation 6051. Up to 1676 conditions per place. [2024-06-21 19:48:24,541 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-21 19:48:24,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 493 flow [2024-06-21 19:48:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:48:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:48:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 19:48:24,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 19:48:24,544 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 331 flow. Second operand 5 states and 91 transitions. [2024-06-21 19:48:24,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 493 flow [2024-06-21 19:48:24,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 70 transitions, 489 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 19:48:24,550 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 363 flow [2024-06-21 19:48:24,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-06-21 19:48:24,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 19:48:24,553 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 363 flow [2024-06-21 19:48:24,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:24,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:24,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:24,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:48:24,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:24,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:24,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1449518769, now seen corresponding path program 1 times [2024-06-21 19:48:24,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:24,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258405132] [2024-06-21 19:48:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:26,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:26,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258405132] [2024-06-21 19:48:26,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258405132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:26,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:48:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014068273] [2024-06-21 19:48:26,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:26,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:48:26,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:48:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:48:26,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:26,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 363 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:26,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:26,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:26,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:27,680 INFO L124 PetriNetUnfolderBase]: 1190/1837 cut-off events. [2024-06-21 19:48:27,681 INFO L125 PetriNetUnfolderBase]: For 5438/5441 co-relation queries the response was YES. [2024-06-21 19:48:27,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6665 conditions, 1837 events. 1190/1837 cut-off events. For 5438/5441 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8581 event pairs, 436 based on Foata normal form. 4/1831 useless extension candidates. Maximal degree in co-relation 6634. Up to 1665 conditions per place. [2024-06-21 19:48:27,692 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-21 19:48:27,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 746 flow [2024-06-21 19:48:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 19:48:27,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 19:48:27,694 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 363 flow. Second operand 6 states and 118 transitions. [2024-06-21 19:48:27,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 746 flow [2024-06-21 19:48:27,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 729 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 19:48:27,699 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 519 flow [2024-06-21 19:48:27,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-21 19:48:27,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-21 19:48:27,700 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 519 flow [2024-06-21 19:48:27,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:27,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:27,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:27,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:48:27,701 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:27,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash -561807729, now seen corresponding path program 2 times [2024-06-21 19:48:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:27,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719410349] [2024-06-21 19:48:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:27,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:29,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:29,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719410349] [2024-06-21 19:48:29,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719410349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:29,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:29,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:48:29,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211556529] [2024-06-21 19:48:29,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:29,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:48:29,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:48:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:48:29,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:29,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 519 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:29,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:29,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:29,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:30,680 INFO L124 PetriNetUnfolderBase]: 1185/1826 cut-off events. [2024-06-21 19:48:30,680 INFO L125 PetriNetUnfolderBase]: For 7381/7387 co-relation queries the response was YES. [2024-06-21 19:48:30,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7313 conditions, 1826 events. 1185/1826 cut-off events. For 7381/7387 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8515 event pairs, 437 based on Foata normal form. 6/1821 useless extension candidates. Maximal degree in co-relation 7278. Up to 1662 conditions per place. [2024-06-21 19:48:30,694 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 61 selfloop transitions, 33 changer transitions 0/99 dead transitions. [2024-06-21 19:48:30,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 99 transitions, 865 flow [2024-06-21 19:48:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 19:48:30,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:48:30,696 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 519 flow. Second operand 6 states and 114 transitions. [2024-06-21 19:48:30,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 99 transitions, 865 flow [2024-06-21 19:48:30,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 849 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-21 19:48:30,705 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 631 flow [2024-06-21 19:48:30,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=631, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-21 19:48:30,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 19:48:30,706 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 631 flow [2024-06-21 19:48:30,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:30,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:30,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:48:30,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:30,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:30,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2045444657, now seen corresponding path program 3 times [2024-06-21 19:48:30,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:30,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483335514] [2024-06-21 19:48:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:30,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:32,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:32,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483335514] [2024-06-21 19:48:32,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483335514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:32,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:32,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:48:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095648020] [2024-06-21 19:48:32,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:32,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:48:32,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:32,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:48:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:48:32,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:32,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 631 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:32,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:32,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:32,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:33,121 INFO L124 PetriNetUnfolderBase]: 1228/1897 cut-off events. [2024-06-21 19:48:33,121 INFO L125 PetriNetUnfolderBase]: For 9380/9386 co-relation queries the response was YES. [2024-06-21 19:48:33,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7968 conditions, 1897 events. 1228/1897 cut-off events. For 9380/9386 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8883 event pairs, 429 based on Foata normal form. 6/1898 useless extension candidates. Maximal degree in co-relation 7928. Up to 1696 conditions per place. [2024-06-21 19:48:33,133 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 43 changer transitions 0/124 dead transitions. [2024-06-21 19:48:33,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1164 flow [2024-06-21 19:48:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:33,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-21 19:48:33,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-21 19:48:33,135 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 631 flow. Second operand 6 states and 129 transitions. [2024-06-21 19:48:33,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1164 flow [2024-06-21 19:48:33,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1128 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-21 19:48:33,144 INFO L231 Difference]: Finished difference. Result has 82 places, 91 transitions, 871 flow [2024-06-21 19:48:33,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=871, PETRI_PLACES=82, PETRI_TRANSITIONS=91} [2024-06-21 19:48:33,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 19:48:33,145 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 91 transitions, 871 flow [2024-06-21 19:48:33,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:33,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:33,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:33,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:48:33,146 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:33,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:33,146 INFO L85 PathProgramCache]: Analyzing trace with hash -561798801, now seen corresponding path program 1 times [2024-06-21 19:48:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:33,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001568620] [2024-06-21 19:48:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:36,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001568620] [2024-06-21 19:48:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001568620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:36,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26345961] [2024-06-21 19:48:36,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:36,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:36,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:36,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:36,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:36,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 91 transitions, 871 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:36,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:36,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:36,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:36,912 INFO L124 PetriNetUnfolderBase]: 1220/1885 cut-off events. [2024-06-21 19:48:36,912 INFO L125 PetriNetUnfolderBase]: For 11186/11186 co-relation queries the response was YES. [2024-06-21 19:48:36,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8358 conditions, 1885 events. 1220/1885 cut-off events. For 11186/11186 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8802 event pairs, 415 based on Foata normal form. 4/1886 useless extension candidates. Maximal degree in co-relation 8314. Up to 1791 conditions per place. [2024-06-21 19:48:36,924 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 93 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-21 19:48:36,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 112 transitions, 1155 flow [2024-06-21 19:48:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 19:48:36,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 19:48:36,926 INFO L175 Difference]: Start difference. First operand has 82 places, 91 transitions, 871 flow. Second operand 7 states and 115 transitions. [2024-06-21 19:48:36,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 112 transitions, 1155 flow [2024-06-21 19:48:36,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 1084 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:36,937 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 857 flow [2024-06-21 19:48:36,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=857, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-06-21 19:48:36,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-21 19:48:36,937 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 857 flow [2024-06-21 19:48:36,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:36,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:36,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:36,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:48:36,938 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:36,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:36,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2110257797, now seen corresponding path program 1 times [2024-06-21 19:48:36,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:36,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496683446] [2024-06-21 19:48:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:36,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:39,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:39,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496683446] [2024-06-21 19:48:39,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496683446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:39,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:39,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:39,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967896117] [2024-06-21 19:48:39,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:39,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:39,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:39,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:39,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 857 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:39,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:39,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:39,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:40,801 INFO L124 PetriNetUnfolderBase]: 1242/1917 cut-off events. [2024-06-21 19:48:40,801 INFO L125 PetriNetUnfolderBase]: For 13188/13197 co-relation queries the response was YES. [2024-06-21 19:48:40,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8704 conditions, 1917 events. 1242/1917 cut-off events. For 13188/13197 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8979 event pairs, 439 based on Foata normal form. 7/1915 useless extension candidates. Maximal degree in co-relation 8660. Up to 1708 conditions per place. [2024-06-21 19:48:40,812 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 70 selfloop transitions, 47 changer transitions 0/122 dead transitions. [2024-06-21 19:48:40,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 122 transitions, 1303 flow [2024-06-21 19:48:40,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 19:48:40,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 19:48:40,814 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 857 flow. Second operand 6 states and 119 transitions. [2024-06-21 19:48:40,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 122 transitions, 1303 flow [2024-06-21 19:48:40,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 122 transitions, 1256 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:48:40,825 INFO L231 Difference]: Finished difference. Result has 86 places, 99 transitions, 994 flow [2024-06-21 19:48:40,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=994, PETRI_PLACES=86, PETRI_TRANSITIONS=99} [2024-06-21 19:48:40,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-21 19:48:40,826 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 99 transitions, 994 flow [2024-06-21 19:48:40,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:40,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:40,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:40,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:48:40,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:40,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:40,827 INFO L85 PathProgramCache]: Analyzing trace with hash -236169245, now seen corresponding path program 2 times [2024-06-21 19:48:40,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:40,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75362265] [2024-06-21 19:48:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:40,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:43,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:43,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75362265] [2024-06-21 19:48:43,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75362265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:43,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:43,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:43,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280690292] [2024-06-21 19:48:43,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:43,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:43,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:43,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:43,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 99 transitions, 994 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:43,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:43,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:43,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:44,709 INFO L124 PetriNetUnfolderBase]: 1234/1899 cut-off events. [2024-06-21 19:48:44,709 INFO L125 PetriNetUnfolderBase]: For 14690/14690 co-relation queries the response was YES. [2024-06-21 19:48:44,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8864 conditions, 1899 events. 1234/1899 cut-off events. For 14690/14690 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8808 event pairs, 421 based on Foata normal form. 3/1893 useless extension candidates. Maximal degree in co-relation 8819. Up to 1700 conditions per place. [2024-06-21 19:48:44,720 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 48 changer transitions 0/120 dead transitions. [2024-06-21 19:48:44,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1330 flow [2024-06-21 19:48:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:48:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:48:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 19:48:44,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 19:48:44,722 INFO L175 Difference]: Start difference. First operand has 86 places, 99 transitions, 994 flow. Second operand 6 states and 113 transitions. [2024-06-21 19:48:44,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1330 flow [2024-06-21 19:48:44,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 120 transitions, 1247 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 19:48:44,735 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 1025 flow [2024-06-21 19:48:44,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1025, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-21 19:48:44,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 19:48:44,736 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 1025 flow [2024-06-21 19:48:44,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:44,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:44,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:44,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:48:44,737 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:44,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1015726243, now seen corresponding path program 3 times [2024-06-21 19:48:44,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:44,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705344596] [2024-06-21 19:48:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:44,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:47,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:47,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705344596] [2024-06-21 19:48:47,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705344596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:47,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:47,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:47,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276891183] [2024-06-21 19:48:47,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:47,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:47,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:47,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:47,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:47,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:47,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 1025 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:47,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:47,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:47,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:48,083 INFO L124 PetriNetUnfolderBase]: 1238/1912 cut-off events. [2024-06-21 19:48:48,084 INFO L125 PetriNetUnfolderBase]: For 16840/16846 co-relation queries the response was YES. [2024-06-21 19:48:48,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9086 conditions, 1912 events. 1238/1912 cut-off events. For 16840/16846 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8922 event pairs, 420 based on Foata normal form. 6/1913 useless extension candidates. Maximal degree in co-relation 9038. Up to 1705 conditions per place. [2024-06-21 19:48:48,095 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 51 changer transitions 0/131 dead transitions. [2024-06-21 19:48:48,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 1411 flow [2024-06-21 19:48:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 19:48:48,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 19:48:48,097 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 1025 flow. Second operand 7 states and 134 transitions. [2024-06-21 19:48:48,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 1411 flow [2024-06-21 19:48:48,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 1332 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 19:48:48,110 INFO L231 Difference]: Finished difference. Result has 93 places, 102 transitions, 1104 flow [2024-06-21 19:48:48,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1104, PETRI_PLACES=93, PETRI_TRANSITIONS=102} [2024-06-21 19:48:48,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 19:48:48,111 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 102 transitions, 1104 flow [2024-06-21 19:48:48,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:48,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:48,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:48,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:48:48,112 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:48,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1121875440, now seen corresponding path program 1 times [2024-06-21 19:48:48,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:48,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100986115] [2024-06-21 19:48:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:48,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:51,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:51,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100986115] [2024-06-21 19:48:51,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100986115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:51,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:51,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:51,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000571822] [2024-06-21 19:48:51,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:51,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:51,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:51,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:51,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:51,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 102 transitions, 1104 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:51,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:51,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:51,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:52,243 INFO L124 PetriNetUnfolderBase]: 1308/2021 cut-off events. [2024-06-21 19:48:52,243 INFO L125 PetriNetUnfolderBase]: For 17883/17883 co-relation queries the response was YES. [2024-06-21 19:48:52,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9530 conditions, 2021 events. 1308/2021 cut-off events. For 17883/17883 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9643 event pairs, 355 based on Foata normal form. 6/2018 useless extension candidates. Maximal degree in co-relation 9482. Up to 1838 conditions per place. [2024-06-21 19:48:52,255 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 110 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-06-21 19:48:52,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 146 transitions, 1630 flow [2024-06-21 19:48:52,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:48:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:48:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 19:48:52,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 19:48:52,256 INFO L175 Difference]: Start difference. First operand has 93 places, 102 transitions, 1104 flow. Second operand 8 states and 145 transitions. [2024-06-21 19:48:52,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 146 transitions, 1630 flow [2024-06-21 19:48:52,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 146 transitions, 1557 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 19:48:52,273 INFO L231 Difference]: Finished difference. Result has 99 places, 114 transitions, 1209 flow [2024-06-21 19:48:52,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1209, PETRI_PLACES=99, PETRI_TRANSITIONS=114} [2024-06-21 19:48:52,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-21 19:48:52,274 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 114 transitions, 1209 flow [2024-06-21 19:48:52,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:52,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:52,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:52,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:48:52,274 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:52,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:52,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1117113840, now seen corresponding path program 2 times [2024-06-21 19:48:52,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:52,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855908765] [2024-06-21 19:48:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:52,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:54,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:54,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855908765] [2024-06-21 19:48:54,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855908765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:54,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:54,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:48:54,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42447963] [2024-06-21 19:48:54,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:54,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:48:54,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:54,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:48:54,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:48:54,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:54,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 114 transitions, 1209 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:54,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:54,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:54,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:48:56,190 INFO L124 PetriNetUnfolderBase]: 1448/2236 cut-off events. [2024-06-21 19:48:56,190 INFO L125 PetriNetUnfolderBase]: For 22023/22032 co-relation queries the response was YES. [2024-06-21 19:48:56,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11057 conditions, 2236 events. 1448/2236 cut-off events. For 22023/22032 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11033 event pairs, 395 based on Foata normal form. 10/2234 useless extension candidates. Maximal degree in co-relation 11006. Up to 1644 conditions per place. [2024-06-21 19:48:56,202 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 51 changer transitions 0/168 dead transitions. [2024-06-21 19:48:56,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 168 transitions, 1940 flow [2024-06-21 19:48:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:48:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:48:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 19:48:56,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-21 19:48:56,204 INFO L175 Difference]: Start difference. First operand has 99 places, 114 transitions, 1209 flow. Second operand 7 states and 145 transitions. [2024-06-21 19:48:56,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 168 transitions, 1940 flow [2024-06-21 19:48:56,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 168 transitions, 1865 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 19:48:56,224 INFO L231 Difference]: Finished difference. Result has 105 places, 128 transitions, 1397 flow [2024-06-21 19:48:56,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1397, PETRI_PLACES=105, PETRI_TRANSITIONS=128} [2024-06-21 19:48:56,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-21 19:48:56,225 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 128 transitions, 1397 flow [2024-06-21 19:48:56,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:56,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:48:56,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:48:56,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:48:56,225 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:48:56,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:48:56,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1418095634, now seen corresponding path program 1 times [2024-06-21 19:48:56,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:48:56,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844967186] [2024-06-21 19:48:56,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:48:56,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:48:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:48:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:48:59,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:48:59,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844967186] [2024-06-21 19:48:59,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844967186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:48:59,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:48:59,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:48:59,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227128352] [2024-06-21 19:48:59,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:48:59,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:48:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:48:59,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:48:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:48:59,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:48:59,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 128 transitions, 1397 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:48:59,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:48:59,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:48:59,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:00,708 INFO L124 PetriNetUnfolderBase]: 1468/2273 cut-off events. [2024-06-21 19:49:00,708 INFO L125 PetriNetUnfolderBase]: For 26231/26240 co-relation queries the response was YES. [2024-06-21 19:49:00,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12070 conditions, 2273 events. 1468/2273 cut-off events. For 26231/26240 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11120 event pairs, 425 based on Foata normal form. 8/2272 useless extension candidates. Maximal degree in co-relation 12015. Up to 2007 conditions per place. [2024-06-21 19:49:00,720 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 52 changer transitions 0/155 dead transitions. [2024-06-21 19:49:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 155 transitions, 1792 flow [2024-06-21 19:49:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:49:00,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 19:49:00,723 INFO L175 Difference]: Start difference. First operand has 105 places, 128 transitions, 1397 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:49:00,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 155 transitions, 1792 flow [2024-06-21 19:49:00,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1779 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 19:49:00,749 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 1525 flow [2024-06-21 19:49:00,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1525, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2024-06-21 19:49:00,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 19:49:00,749 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 1525 flow [2024-06-21 19:49:00,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:00,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:00,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:00,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:49:00,750 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:00,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:00,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1933617374, now seen corresponding path program 3 times [2024-06-21 19:49:00,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:00,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559019957] [2024-06-21 19:49:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:00,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:00,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:03,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:03,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559019957] [2024-06-21 19:49:03,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559019957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:03,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:03,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409920937] [2024-06-21 19:49:03,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:03,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:03,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:03,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:03,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:03,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 1525 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:03,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:03,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:03,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:04,668 INFO L124 PetriNetUnfolderBase]: 1456/2242 cut-off events. [2024-06-21 19:49:04,668 INFO L125 PetriNetUnfolderBase]: For 30102/30102 co-relation queries the response was YES. [2024-06-21 19:49:04,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12391 conditions, 2242 events. 1456/2242 cut-off events. For 30102/30102 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11037 event pairs, 367 based on Foata normal form. 6/2232 useless extension candidates. Maximal degree in co-relation 12333. Up to 1670 conditions per place. [2024-06-21 19:49:04,681 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 54 changer transitions 0/168 dead transitions. [2024-06-21 19:49:04,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 168 transitions, 2167 flow [2024-06-21 19:49:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:49:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:49:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 19:49:04,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-21 19:49:04,683 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 1525 flow. Second operand 7 states and 139 transitions. [2024-06-21 19:49:04,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 168 transitions, 2167 flow [2024-06-21 19:49:04,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 168 transitions, 2017 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 19:49:04,706 INFO L231 Difference]: Finished difference. Result has 113 places, 133 transitions, 1541 flow [2024-06-21 19:49:04,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1541, PETRI_PLACES=113, PETRI_TRANSITIONS=133} [2024-06-21 19:49:04,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-21 19:49:04,706 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 133 transitions, 1541 flow [2024-06-21 19:49:04,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:04,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:04,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:04,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:49:04,707 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:04,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:04,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1190194484, now seen corresponding path program 2 times [2024-06-21 19:49:04,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:04,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902366642] [2024-06-21 19:49:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:08,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:08,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902366642] [2024-06-21 19:49:08,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902366642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:08,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:08,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718475780] [2024-06-21 19:49:08,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:08,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:08,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:08,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:08,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 133 transitions, 1541 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:08,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:08,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:08,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:09,330 INFO L124 PetriNetUnfolderBase]: 1476/2297 cut-off events. [2024-06-21 19:49:09,331 INFO L125 PetriNetUnfolderBase]: For 32882/32882 co-relation queries the response was YES. [2024-06-21 19:49:09,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12987 conditions, 2297 events. 1476/2297 cut-off events. For 32882/32882 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11278 event pairs, 417 based on Foata normal form. 4/2292 useless extension candidates. Maximal degree in co-relation 12927. Up to 2027 conditions per place. [2024-06-21 19:49:09,344 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 53 changer transitions 0/160 dead transitions. [2024-06-21 19:49:09,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 160 transitions, 1957 flow [2024-06-21 19:49:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 19:49:09,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 19:49:09,349 INFO L175 Difference]: Start difference. First operand has 113 places, 133 transitions, 1541 flow. Second operand 8 states and 135 transitions. [2024-06-21 19:49:09,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 160 transitions, 1957 flow [2024-06-21 19:49:09,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 160 transitions, 1884 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 19:49:09,380 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 1616 flow [2024-06-21 19:49:09,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1616, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-06-21 19:49:09,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 19:49:09,380 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 1616 flow [2024-06-21 19:49:09,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:09,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:09,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:09,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:49:09,381 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:09,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1181623604, now seen corresponding path program 3 times [2024-06-21 19:49:09,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:09,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920226445] [2024-06-21 19:49:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:12,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:12,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920226445] [2024-06-21 19:49:12,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920226445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:12,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:12,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:12,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93799922] [2024-06-21 19:49:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:12,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:12,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:12,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:12,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:12,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:12,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 1616 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:12,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:12,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:12,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:13,712 INFO L124 PetriNetUnfolderBase]: 1496/2329 cut-off events. [2024-06-21 19:49:13,713 INFO L125 PetriNetUnfolderBase]: For 37307/37307 co-relation queries the response was YES. [2024-06-21 19:49:13,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13361 conditions, 2329 events. 1496/2329 cut-off events. For 37307/37307 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11507 event pairs, 381 based on Foata normal form. 4/2324 useless extension candidates. Maximal degree in co-relation 13299. Up to 1951 conditions per place. [2024-06-21 19:49:13,733 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 103 selfloop transitions, 59 changer transitions 0/167 dead transitions. [2024-06-21 19:49:13,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 2155 flow [2024-06-21 19:49:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:49:13,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:49:13,735 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 1616 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:49:13,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 2155 flow [2024-06-21 19:49:13,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 167 transitions, 2025 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 19:49:13,764 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 1683 flow [2024-06-21 19:49:13,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1683, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-06-21 19:49:13,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 19:49:13,765 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 1683 flow [2024-06-21 19:49:13,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:13,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:13,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:13,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:49:13,765 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:13,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:13,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1141489096, now seen corresponding path program 4 times [2024-06-21 19:49:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:13,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797217577] [2024-06-21 19:49:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:13,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:16,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:16,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797217577] [2024-06-21 19:49:16,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797217577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:16,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:16,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:16,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913890591] [2024-06-21 19:49:16,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:16,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:16,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:16,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:16,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:16,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:16,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 1683 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:16,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:16,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:16,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:17,253 INFO L124 PetriNetUnfolderBase]: 1626/2547 cut-off events. [2024-06-21 19:49:17,254 INFO L125 PetriNetUnfolderBase]: For 42277/42277 co-relation queries the response was YES. [2024-06-21 19:49:17,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14728 conditions, 2547 events. 1626/2547 cut-off events. For 42277/42277 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12985 event pairs, 366 based on Foata normal form. 6/2550 useless extension candidates. Maximal degree in co-relation 14666. Up to 2255 conditions per place. [2024-06-21 19:49:17,269 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 149 selfloop transitions, 48 changer transitions 0/202 dead transitions. [2024-06-21 19:49:17,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2576 flow [2024-06-21 19:49:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:49:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:49:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-21 19:49:17,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-21 19:49:17,271 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 1683 flow. Second operand 7 states and 148 transitions. [2024-06-21 19:49:17,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2576 flow [2024-06-21 19:49:17,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2478 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 19:49:17,309 INFO L231 Difference]: Finished difference. Result has 125 places, 161 transitions, 1974 flow [2024-06-21 19:49:17,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1974, PETRI_PLACES=125, PETRI_TRANSITIONS=161} [2024-06-21 19:49:17,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 19:49:17,310 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 161 transitions, 1974 flow [2024-06-21 19:49:17,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:17,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:17,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:17,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:49:17,311 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:17,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1940937102, now seen corresponding path program 5 times [2024-06-21 19:49:17,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:17,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125852051] [2024-06-21 19:49:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:17,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:19,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:19,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125852051] [2024-06-21 19:49:19,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125852051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:19,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:19,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:19,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197836355] [2024-06-21 19:49:19,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:19,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:19,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:19,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:19,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 161 transitions, 1974 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:19,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:19,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:19,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:21,104 INFO L124 PetriNetUnfolderBase]: 1888/2938 cut-off events. [2024-06-21 19:49:21,104 INFO L125 PetriNetUnfolderBase]: For 49441/49447 co-relation queries the response was YES. [2024-06-21 19:49:21,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17502 conditions, 2938 events. 1888/2938 cut-off events. For 49441/49447 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15320 event pairs, 385 based on Foata normal form. 10/2943 useless extension candidates. Maximal degree in co-relation 17437. Up to 2032 conditions per place. [2024-06-21 19:49:21,126 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 138 selfloop transitions, 100 changer transitions 0/243 dead transitions. [2024-06-21 19:49:21,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 243 transitions, 3231 flow [2024-06-21 19:49:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 19:49:21,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 19:49:21,127 INFO L175 Difference]: Start difference. First operand has 125 places, 161 transitions, 1974 flow. Second operand 8 states and 164 transitions. [2024-06-21 19:49:21,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 243 transitions, 3231 flow [2024-06-21 19:49:21,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 243 transitions, 3165 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 19:49:21,178 INFO L231 Difference]: Finished difference. Result has 133 places, 191 transitions, 2497 flow [2024-06-21 19:49:21,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2497, PETRI_PLACES=133, PETRI_TRANSITIONS=191} [2024-06-21 19:49:21,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 19:49:21,178 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 191 transitions, 2497 flow [2024-06-21 19:49:21,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:21,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:21,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:21,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:49:21,179 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:21,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1056641324, now seen corresponding path program 6 times [2024-06-21 19:49:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:21,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496821949] [2024-06-21 19:49:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:22,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:22,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496821949] [2024-06-21 19:49:22,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496821949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:22,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:22,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:49:22,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559723771] [2024-06-21 19:49:22,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:22,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:49:22,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:22,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:49:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:49:22,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:22,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 191 transitions, 2497 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:22,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:22,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:22,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:24,069 INFO L124 PetriNetUnfolderBase]: 2003/3097 cut-off events. [2024-06-21 19:49:24,069 INFO L125 PetriNetUnfolderBase]: For 58713/58713 co-relation queries the response was YES. [2024-06-21 19:49:24,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19846 conditions, 3097 events. 2003/3097 cut-off events. For 58713/58713 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16139 event pairs, 379 based on Foata normal form. 3/3097 useless extension candidates. Maximal degree in co-relation 19777. Up to 2629 conditions per place. [2024-06-21 19:49:24,092 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 181 selfloop transitions, 96 changer transitions 0/282 dead transitions. [2024-06-21 19:49:24,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 282 transitions, 3987 flow [2024-06-21 19:49:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:49:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:49:24,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 19:49:24,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 19:49:24,094 INFO L175 Difference]: Start difference. First operand has 133 places, 191 transitions, 2497 flow. Second operand 10 states and 196 transitions. [2024-06-21 19:49:24,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 282 transitions, 3987 flow [2024-06-21 19:49:24,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 282 transitions, 3820 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 19:49:24,157 INFO L231 Difference]: Finished difference. Result has 144 places, 228 transitions, 3166 flow [2024-06-21 19:49:24,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3166, PETRI_PLACES=144, PETRI_TRANSITIONS=228} [2024-06-21 19:49:24,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 19:49:24,157 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 228 transitions, 3166 flow [2024-06-21 19:49:24,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:24,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:24,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:24,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:49:24,158 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:24,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:24,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1209569396, now seen corresponding path program 4 times [2024-06-21 19:49:24,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:24,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503282903] [2024-06-21 19:49:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:24,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:27,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:27,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503282903] [2024-06-21 19:49:27,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503282903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:27,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:27,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:27,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90237152] [2024-06-21 19:49:27,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:27,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:27,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:27,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:27,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:27,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 228 transitions, 3166 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:27,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:27,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:27,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:28,532 INFO L124 PetriNetUnfolderBase]: 2009/3118 cut-off events. [2024-06-21 19:49:28,533 INFO L125 PetriNetUnfolderBase]: For 66671/66677 co-relation queries the response was YES. [2024-06-21 19:49:28,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20560 conditions, 3118 events. 2009/3118 cut-off events. For 66671/66677 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16278 event pairs, 462 based on Foata normal form. 8/3121 useless extension candidates. Maximal degree in co-relation 20486. Up to 2780 conditions per place. [2024-06-21 19:49:28,559 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 204 selfloop transitions, 56 changer transitions 0/265 dead transitions. [2024-06-21 19:49:28,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 265 transitions, 3823 flow [2024-06-21 19:49:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 19:49:28,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 19:49:28,561 INFO L175 Difference]: Start difference. First operand has 144 places, 228 transitions, 3166 flow. Second operand 8 states and 150 transitions. [2024-06-21 19:49:28,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 265 transitions, 3823 flow [2024-06-21 19:49:28,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 265 transitions, 3746 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 19:49:28,640 INFO L231 Difference]: Finished difference. Result has 149 places, 230 transitions, 3227 flow [2024-06-21 19:49:28,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3089, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3227, PETRI_PLACES=149, PETRI_TRANSITIONS=230} [2024-06-21 19:49:28,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 19:49:28,641 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 230 transitions, 3227 flow [2024-06-21 19:49:28,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:28,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:28,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:28,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:49:28,641 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:28,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash -852633206, now seen corresponding path program 1 times [2024-06-21 19:49:28,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:28,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13655743] [2024-06-21 19:49:28,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:28,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:30,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13655743] [2024-06-21 19:49:30,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13655743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:30,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:30,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:49:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366136460] [2024-06-21 19:49:30,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:30,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:49:30,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:49:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:49:30,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:30,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 230 transitions, 3227 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) [2024-06-21 19:49:30,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:30,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:30,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:31,755 INFO L124 PetriNetUnfolderBase]: 2000/3098 cut-off events. [2024-06-21 19:49:31,755 INFO L125 PetriNetUnfolderBase]: For 70399/70399 co-relation queries the response was YES. [2024-06-21 19:49:31,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20686 conditions, 3098 events. 2000/3098 cut-off events. For 70399/70399 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16093 event pairs, 566 based on Foata normal form. 3/3098 useless extension candidates. Maximal degree in co-relation 20611. Up to 2952 conditions per place. [2024-06-21 19:49:31,779 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 226 selfloop transitions, 12 changer transitions 0/243 dead transitions. [2024-06-21 19:49:31,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 243 transitions, 3757 flow [2024-06-21 19:49:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:49:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:49:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 19:49:31,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 19:49:31,780 INFO L175 Difference]: Start difference. First operand has 149 places, 230 transitions, 3227 flow. Second operand 5 states and 87 transitions. [2024-06-21 19:49:31,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 243 transitions, 3757 flow [2024-06-21 19:49:31,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 243 transitions, 3626 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:49:31,862 INFO L231 Difference]: Finished difference. Result has 147 places, 233 transitions, 3160 flow [2024-06-21 19:49:31,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3096, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3160, PETRI_PLACES=147, PETRI_TRANSITIONS=233} [2024-06-21 19:49:31,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-21 19:49:31,863 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 233 transitions, 3160 flow [2024-06-21 19:49:31,863 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) [2024-06-21 19:49:31,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:31,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:31,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:49:31,863 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:31,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1575227964, now seen corresponding path program 1 times [2024-06-21 19:49:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:31,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107343346] [2024-06-21 19:49:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:34,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:34,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107343346] [2024-06-21 19:49:34,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107343346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:34,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:34,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841221363] [2024-06-21 19:49:34,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:34,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:34,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:34,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:34,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 233 transitions, 3160 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:34,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:34,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:34,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:35,957 INFO L124 PetriNetUnfolderBase]: 2001/3096 cut-off events. [2024-06-21 19:49:35,957 INFO L125 PetriNetUnfolderBase]: For 70825/70825 co-relation queries the response was YES. [2024-06-21 19:49:35,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20745 conditions, 3096 events. 2001/3096 cut-off events. For 70825/70825 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16055 event pairs, 377 based on Foata normal form. 3/3096 useless extension candidates. Maximal degree in co-relation 20668. Up to 2661 conditions per place. [2024-06-21 19:49:35,983 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 189 selfloop transitions, 90 changer transitions 0/284 dead transitions. [2024-06-21 19:49:35,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 284 transitions, 4016 flow [2024-06-21 19:49:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:49:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:49:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 19:49:35,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-21 19:49:35,984 INFO L175 Difference]: Start difference. First operand has 147 places, 233 transitions, 3160 flow. Second operand 10 states and 187 transitions. [2024-06-21 19:49:35,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 284 transitions, 4016 flow [2024-06-21 19:49:36,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 284 transitions, 3984 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 19:49:36,081 INFO L231 Difference]: Finished difference. Result has 155 places, 237 transitions, 3384 flow [2024-06-21 19:49:36,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3128, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3384, PETRI_PLACES=155, PETRI_TRANSITIONS=237} [2024-06-21 19:49:36,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 19:49:36,082 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 237 transitions, 3384 flow [2024-06-21 19:49:36,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:36,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:36,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:36,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:49:36,083 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:36,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash 964445099, now seen corresponding path program 1 times [2024-06-21 19:49:36,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:36,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166362425] [2024-06-21 19:49:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:36,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:39,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:39,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166362425] [2024-06-21 19:49:39,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166362425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:39,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:39,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:39,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380723473] [2024-06-21 19:49:39,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:39,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:39,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:39,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 237 transitions, 3384 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:39,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:39,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:39,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:41,391 INFO L124 PetriNetUnfolderBase]: 2323/3617 cut-off events. [2024-06-21 19:49:41,391 INFO L125 PetriNetUnfolderBase]: For 94924/94924 co-relation queries the response was YES. [2024-06-21 19:49:41,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24453 conditions, 3617 events. 2323/3617 cut-off events. For 94924/94924 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19633 event pairs, 410 based on Foata normal form. 24/3629 useless extension candidates. Maximal degree in co-relation 24374. Up to 2757 conditions per place. [2024-06-21 19:49:41,417 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 69 changer transitions 0/296 dead transitions. [2024-06-21 19:49:41,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 296 transitions, 4478 flow [2024-06-21 19:49:41,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:49:41,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:49:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 19:49:41,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 19:49:41,419 INFO L175 Difference]: Start difference. First operand has 155 places, 237 transitions, 3384 flow. Second operand 10 states and 189 transitions. [2024-06-21 19:49:41,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 296 transitions, 4478 flow [2024-06-21 19:49:41,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 296 transitions, 4341 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:49:41,507 INFO L231 Difference]: Finished difference. Result has 160 places, 243 transitions, 3502 flow [2024-06-21 19:49:41,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3502, PETRI_PLACES=160, PETRI_TRANSITIONS=243} [2024-06-21 19:49:41,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 19:49:41,508 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 243 transitions, 3502 flow [2024-06-21 19:49:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:41,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:41,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:41,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:49:41,508 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:41,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:41,509 INFO L85 PathProgramCache]: Analyzing trace with hash -85474033, now seen corresponding path program 2 times [2024-06-21 19:49:41,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:41,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414507040] [2024-06-21 19:49:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:44,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:44,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414507040] [2024-06-21 19:49:44,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414507040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:44,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:44,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:44,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33188913] [2024-06-21 19:49:44,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:44,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:44,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:44,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:44,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:44,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:44,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 243 transitions, 3502 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:44,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:44,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:44,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:46,310 INFO L124 PetriNetUnfolderBase]: 2277/3551 cut-off events. [2024-06-21 19:49:46,310 INFO L125 PetriNetUnfolderBase]: For 94861/94861 co-relation queries the response was YES. [2024-06-21 19:49:46,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23978 conditions, 3551 events. 2277/3551 cut-off events. For 94861/94861 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19126 event pairs, 453 based on Foata normal form. 30/3569 useless extension candidates. Maximal degree in co-relation 23897. Up to 2954 conditions per place. [2024-06-21 19:49:46,340 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 65 changer transitions 0/284 dead transitions. [2024-06-21 19:49:46,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 284 transitions, 4385 flow [2024-06-21 19:49:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:49:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:49:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 19:49:46,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 19:49:46,341 INFO L175 Difference]: Start difference. First operand has 160 places, 243 transitions, 3502 flow. Second operand 9 states and 165 transitions. [2024-06-21 19:49:46,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 284 transitions, 4385 flow [2024-06-21 19:49:46,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 284 transitions, 4279 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 19:49:46,446 INFO L231 Difference]: Finished difference. Result has 165 places, 244 transitions, 3572 flow [2024-06-21 19:49:46,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3572, PETRI_PLACES=165, PETRI_TRANSITIONS=244} [2024-06-21 19:49:46,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 19:49:46,447 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 244 transitions, 3572 flow [2024-06-21 19:49:46,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:46,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:46,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:49:46,447 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:46,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1248232363, now seen corresponding path program 3 times [2024-06-21 19:49:46,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:46,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578133317] [2024-06-21 19:49:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:46,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:49,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:49,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578133317] [2024-06-21 19:49:49,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578133317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:49,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:49,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:49,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016435060] [2024-06-21 19:49:49,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:49,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:49,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:49,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:49,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:49,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:49,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 244 transitions, 3572 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:49,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:49,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:49,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:51,247 INFO L124 PetriNetUnfolderBase]: 2414/3792 cut-off events. [2024-06-21 19:49:51,247 INFO L125 PetriNetUnfolderBase]: For 103178/103184 co-relation queries the response was YES. [2024-06-21 19:49:51,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25166 conditions, 3792 events. 2414/3792 cut-off events. For 103178/103184 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21049 event pairs, 532 based on Foata normal form. 32/3806 useless extension candidates. Maximal degree in co-relation 25083. Up to 2550 conditions per place. [2024-06-21 19:49:51,276 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 161 selfloop transitions, 125 changer transitions 0/291 dead transitions. [2024-06-21 19:49:51,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 291 transitions, 4616 flow [2024-06-21 19:49:51,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:49:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:49:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 19:49:51,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-21 19:49:51,277 INFO L175 Difference]: Start difference. First operand has 165 places, 244 transitions, 3572 flow. Second operand 8 states and 163 transitions. [2024-06-21 19:49:51,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 291 transitions, 4616 flow [2024-06-21 19:49:51,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 291 transitions, 4480 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 19:49:51,388 INFO L231 Difference]: Finished difference. Result has 165 places, 246 transitions, 3744 flow [2024-06-21 19:49:51,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3744, PETRI_PLACES=165, PETRI_TRANSITIONS=246} [2024-06-21 19:49:51,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 19:49:51,388 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 246 transitions, 3744 flow [2024-06-21 19:49:51,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:51,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:51,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:51,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:49:51,389 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:49:51,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:51,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1129987529, now seen corresponding path program 1 times [2024-06-21 19:49:51,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:51,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080266908] [2024-06-21 19:49:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:51,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:55,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:55,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080266908] [2024-06-21 19:49:55,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080266908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:55,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:55,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:49:55,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356057678] [2024-06-21 19:49:55,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:55,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:49:55,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:55,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:49:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:49:55,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:55,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 246 transitions, 3744 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:55,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:55,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:55,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:49:57,048 INFO L124 PetriNetUnfolderBase]: 2561/4041 cut-off events. [2024-06-21 19:49:57,049 INFO L125 PetriNetUnfolderBase]: For 111495/111501 co-relation queries the response was YES. [2024-06-21 19:49:57,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27503 conditions, 4041 events. 2561/4041 cut-off events. For 111495/111501 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22840 event pairs, 571 based on Foata normal form. 20/4043 useless extension candidates. Maximal degree in co-relation 27419. Up to 2199 conditions per place. [2024-06-21 19:49:57,084 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 120 changer transitions 0/299 dead transitions. [2024-06-21 19:49:57,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 299 transitions, 4920 flow [2024-06-21 19:49:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:49:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:49:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 19:49:57,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 19:49:57,085 INFO L175 Difference]: Start difference. First operand has 165 places, 246 transitions, 3744 flow. Second operand 9 states and 173 transitions. [2024-06-21 19:49:57,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 299 transitions, 4920 flow [2024-06-21 19:49:57,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 299 transitions, 4648 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:49:57,226 INFO L231 Difference]: Finished difference. Result has 169 places, 249 transitions, 3804 flow [2024-06-21 19:49:57,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3804, PETRI_PLACES=169, PETRI_TRANSITIONS=249} [2024-06-21 19:49:57,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 19:49:57,227 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 249 transitions, 3804 flow [2024-06-21 19:49:57,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:57,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:49:57,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:49:57,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:49:57,228 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)] === [2024-06-21 19:49:57,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:49:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash 946840393, now seen corresponding path program 1 times [2024-06-21 19:49:57,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:49:57,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419245453] [2024-06-21 19:49:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:49:57,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:49:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:49:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:49:59,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:49:59,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419245453] [2024-06-21 19:49:59,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419245453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:49:59,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:49:59,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:49:59,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485953653] [2024-06-21 19:49:59,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:49:59,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:49:59,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:49:59,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:49:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:49:59,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:49:59,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 249 transitions, 3804 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:49:59,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:49:59,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:49:59,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:01,021 INFO L124 PetriNetUnfolderBase]: 2549/4033 cut-off events. [2024-06-21 19:50:01,022 INFO L125 PetriNetUnfolderBase]: For 110163/110163 co-relation queries the response was YES. [2024-06-21 19:50:01,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27500 conditions, 4033 events. 2549/4033 cut-off events. For 110163/110163 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22809 event pairs, 582 based on Foata normal form. 2/4023 useless extension candidates. Maximal degree in co-relation 27415. Up to 3742 conditions per place. [2024-06-21 19:50:01,051 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 223 selfloop transitions, 45 changer transitions 0/273 dead transitions. [2024-06-21 19:50:01,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 273 transitions, 4578 flow [2024-06-21 19:50:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 19:50:01,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 19:50:01,052 INFO L175 Difference]: Start difference. First operand has 169 places, 249 transitions, 3804 flow. Second operand 6 states and 119 transitions. [2024-06-21 19:50:01,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 273 transitions, 4578 flow [2024-06-21 19:50:01,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 273 transitions, 4432 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:01,186 INFO L231 Difference]: Finished difference. Result has 170 places, 249 transitions, 3770 flow [2024-06-21 19:50:01,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3770, PETRI_PLACES=170, PETRI_TRANSITIONS=249} [2024-06-21 19:50:01,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 19:50:01,187 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 249 transitions, 3770 flow [2024-06-21 19:50:01,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:01,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:01,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:01,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:50:01,188 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:01,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1372290381, now seen corresponding path program 4 times [2024-06-21 19:50:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:01,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535813065] [2024-06-21 19:50:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:01,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:04,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:04,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535813065] [2024-06-21 19:50:04,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535813065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:04,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:04,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:04,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154909562] [2024-06-21 19:50:04,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:04,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:04,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:04,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 249 transitions, 3770 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:04,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:04,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:04,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:06,494 INFO L124 PetriNetUnfolderBase]: 2686/4250 cut-off events. [2024-06-21 19:50:06,495 INFO L125 PetriNetUnfolderBase]: For 125594/125594 co-relation queries the response was YES. [2024-06-21 19:50:06,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28915 conditions, 4250 events. 2686/4250 cut-off events. For 125594/125594 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24400 event pairs, 571 based on Foata normal form. 30/4261 useless extension candidates. Maximal degree in co-relation 28827. Up to 3006 conditions per place. [2024-06-21 19:50:06,524 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 124 changer transitions 0/293 dead transitions. [2024-06-21 19:50:06,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 293 transitions, 4834 flow [2024-06-21 19:50:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:06,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 19:50:06,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 19:50:06,526 INFO L175 Difference]: Start difference. First operand has 170 places, 249 transitions, 3770 flow. Second operand 9 states and 166 transitions. [2024-06-21 19:50:06,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 293 transitions, 4834 flow [2024-06-21 19:50:06,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 293 transitions, 4759 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:06,649 INFO L231 Difference]: Finished difference. Result has 175 places, 250 transitions, 3970 flow [2024-06-21 19:50:06,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3970, PETRI_PLACES=175, PETRI_TRANSITIONS=250} [2024-06-21 19:50:06,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 19:50:06,649 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 250 transitions, 3970 flow [2024-06-21 19:50:06,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:06,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:06,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:06,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:50:06,650 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:06,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:06,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1315567861, now seen corresponding path program 2 times [2024-06-21 19:50:06,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:06,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413153898] [2024-06-21 19:50:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:06,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:10,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:10,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413153898] [2024-06-21 19:50:10,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413153898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:10,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:10,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:50:10,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959043640] [2024-06-21 19:50:10,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:10,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:50:10,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:50:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:50:10,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:10,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 250 transitions, 3970 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:10,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:10,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:10,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:12,406 INFO L124 PetriNetUnfolderBase]: 2774/4411 cut-off events. [2024-06-21 19:50:12,406 INFO L125 PetriNetUnfolderBase]: For 131842/131842 co-relation queries the response was YES. [2024-06-21 19:50:12,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30666 conditions, 4411 events. 2774/4411 cut-off events. For 131842/131842 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25756 event pairs, 586 based on Foata normal form. 18/4410 useless extension candidates. Maximal degree in co-relation 30576. Up to 2982 conditions per place. [2024-06-21 19:50:12,441 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 173 selfloop transitions, 123 changer transitions 0/301 dead transitions. [2024-06-21 19:50:12,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 301 transitions, 5202 flow [2024-06-21 19:50:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 19:50:12,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 19:50:12,442 INFO L175 Difference]: Start difference. First operand has 175 places, 250 transitions, 3970 flow. Second operand 9 states and 169 transitions. [2024-06-21 19:50:12,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 301 transitions, 5202 flow [2024-06-21 19:50:12,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 301 transitions, 4911 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 19:50:12,604 INFO L231 Difference]: Finished difference. Result has 177 places, 253 transitions, 4006 flow [2024-06-21 19:50:12,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4006, PETRI_PLACES=177, PETRI_TRANSITIONS=253} [2024-06-21 19:50:12,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-21 19:50:12,604 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 253 transitions, 4006 flow [2024-06-21 19:50:12,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:12,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:12,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:12,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:50:12,605 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:12,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:12,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1668886773, now seen corresponding path program 3 times [2024-06-21 19:50:12,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:12,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064217891] [2024-06-21 19:50:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:12,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:16,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:16,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064217891] [2024-06-21 19:50:16,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064217891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:16,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:16,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:50:16,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259221904] [2024-06-21 19:50:16,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:16,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:50:16,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:16,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:50:16,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:50:16,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:16,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 253 transitions, 4006 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:16,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:16,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:16,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:18,294 INFO L124 PetriNetUnfolderBase]: 3004/4800 cut-off events. [2024-06-21 19:50:18,295 INFO L125 PetriNetUnfolderBase]: For 154180/154180 co-relation queries the response was YES. [2024-06-21 19:50:18,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33794 conditions, 4800 events. 3004/4800 cut-off events. For 154180/154180 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28534 event pairs, 602 based on Foata normal form. 18/4799 useless extension candidates. Maximal degree in co-relation 33703. Up to 1882 conditions per place. [2024-06-21 19:50:18,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 172 selfloop transitions, 129 changer transitions 0/306 dead transitions. [2024-06-21 19:50:18,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 306 transitions, 5326 flow [2024-06-21 19:50:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 19:50:18,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 19:50:18,340 INFO L175 Difference]: Start difference. First operand has 177 places, 253 transitions, 4006 flow. Second operand 9 states and 169 transitions. [2024-06-21 19:50:18,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 306 transitions, 5326 flow [2024-06-21 19:50:18,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 306 transitions, 5160 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:18,553 INFO L231 Difference]: Finished difference. Result has 183 places, 258 transitions, 4276 flow [2024-06-21 19:50:18,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4276, PETRI_PLACES=183, PETRI_TRANSITIONS=258} [2024-06-21 19:50:18,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 19:50:18,554 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 258 transitions, 4276 flow [2024-06-21 19:50:18,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:18,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:18,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:18,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:50:18,554 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)] === [2024-06-21 19:50:18,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1645546603, now seen corresponding path program 2 times [2024-06-21 19:50:18,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:18,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743244400] [2024-06-21 19:50:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:18,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:21,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:21,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743244400] [2024-06-21 19:50:21,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743244400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:21,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:21,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:50:21,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586703875] [2024-06-21 19:50:21,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:21,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:50:21,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:21,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:50:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:50:21,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:21,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 258 transitions, 4276 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:21,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:21,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:21,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:22,765 INFO L124 PetriNetUnfolderBase]: 2974/4752 cut-off events. [2024-06-21 19:50:22,765 INFO L125 PetriNetUnfolderBase]: For 158088/158088 co-relation queries the response was YES. [2024-06-21 19:50:22,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34799 conditions, 4752 events. 2974/4752 cut-off events. For 158088/158088 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28217 event pairs, 754 based on Foata normal form. 1/4741 useless extension candidates. Maximal degree in co-relation 34704. Up to 4444 conditions per place. [2024-06-21 19:50:22,808 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 52 changer transitions 0/281 dead transitions. [2024-06-21 19:50:22,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 281 transitions, 5118 flow [2024-06-21 19:50:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:50:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:50:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 19:50:22,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:50:22,809 INFO L175 Difference]: Start difference. First operand has 183 places, 258 transitions, 4276 flow. Second operand 6 states and 112 transitions. [2024-06-21 19:50:22,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 281 transitions, 5118 flow [2024-06-21 19:50:23,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 281 transitions, 4925 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:23,037 INFO L231 Difference]: Finished difference. Result has 186 places, 264 transitions, 4364 flow [2024-06-21 19:50:23,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4090, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4364, PETRI_PLACES=186, PETRI_TRANSITIONS=264} [2024-06-21 19:50:23,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 19:50:23,037 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 264 transitions, 4364 flow [2024-06-21 19:50:23,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:23,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:23,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:23,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:50:23,038 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:23,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1166631117, now seen corresponding path program 5 times [2024-06-21 19:50:23,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:23,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134241897] [2024-06-21 19:50:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:23,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:26,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134241897] [2024-06-21 19:50:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134241897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:26,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:26,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147911797] [2024-06-21 19:50:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:26,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:26,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:26,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:26,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:26,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 264 transitions, 4364 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:26,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:26,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:26,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:27,940 INFO L124 PetriNetUnfolderBase]: 3489/5592 cut-off events. [2024-06-21 19:50:27,941 INFO L125 PetriNetUnfolderBase]: For 193411/193411 co-relation queries the response was YES. [2024-06-21 19:50:27,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40244 conditions, 5592 events. 3489/5592 cut-off events. For 193411/193411 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 34480 event pairs, 792 based on Foata normal form. 24/5613 useless extension candidates. Maximal degree in co-relation 40145. Up to 4451 conditions per place. [2024-06-21 19:50:27,993 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 81 changer transitions 0/338 dead transitions. [2024-06-21 19:50:27,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 338 transitions, 5735 flow [2024-06-21 19:50:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 19:50:27,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-21 19:50:27,994 INFO L175 Difference]: Start difference. First operand has 186 places, 264 transitions, 4364 flow. Second operand 9 states and 190 transitions. [2024-06-21 19:50:27,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 338 transitions, 5735 flow [2024-06-21 19:50:28,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 338 transitions, 5671 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 19:50:28,278 INFO L231 Difference]: Finished difference. Result has 194 places, 277 transitions, 4720 flow [2024-06-21 19:50:28,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4720, PETRI_PLACES=194, PETRI_TRANSITIONS=277} [2024-06-21 19:50:28,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 19:50:28,279 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 277 transitions, 4720 flow [2024-06-21 19:50:28,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:28,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:28,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:28,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:50:28,279 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:28,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1252376683, now seen corresponding path program 6 times [2024-06-21 19:50:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:28,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111120133] [2024-06-21 19:50:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:31,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:31,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111120133] [2024-06-21 19:50:31,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111120133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:31,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:31,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:31,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137342132] [2024-06-21 19:50:31,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:31,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:31,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:31,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:31,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:31,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 277 transitions, 4720 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:31,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:31,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:31,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:33,072 INFO L124 PetriNetUnfolderBase]: 3443/5526 cut-off events. [2024-06-21 19:50:33,072 INFO L125 PetriNetUnfolderBase]: For 198059/198059 co-relation queries the response was YES. [2024-06-21 19:50:33,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40171 conditions, 5526 events. 3443/5526 cut-off events. For 198059/198059 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33975 event pairs, 827 based on Foata normal form. 30/5553 useless extension candidates. Maximal degree in co-relation 40070. Up to 4765 conditions per place. [2024-06-21 19:50:33,123 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 249 selfloop transitions, 72 changer transitions 0/326 dead transitions. [2024-06-21 19:50:33,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 326 transitions, 5741 flow [2024-06-21 19:50:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:50:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:50:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 19:50:33,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-21 19:50:33,125 INFO L175 Difference]: Start difference. First operand has 194 places, 277 transitions, 4720 flow. Second operand 8 states and 166 transitions. [2024-06-21 19:50:33,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 326 transitions, 5741 flow [2024-06-21 19:50:33,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 326 transitions, 5547 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 19:50:33,457 INFO L231 Difference]: Finished difference. Result has 198 places, 278 transitions, 4726 flow [2024-06-21 19:50:33,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4726, PETRI_PLACES=198, PETRI_TRANSITIONS=278} [2024-06-21 19:50:33,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 19:50:33,458 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 278 transitions, 4726 flow [2024-06-21 19:50:33,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:33,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:33,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:33,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:50:33,459 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:33,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:33,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1533306987, now seen corresponding path program 7 times [2024-06-21 19:50:33,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:33,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319059520] [2024-06-21 19:50:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:33,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:36,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:36,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319059520] [2024-06-21 19:50:36,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319059520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:36,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:36,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:36,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820765160] [2024-06-21 19:50:36,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:36,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:36,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:36,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:36,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:36,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:36,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 278 transitions, 4726 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:36,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:36,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:36,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:38,550 INFO L124 PetriNetUnfolderBase]: 3727/6004 cut-off events. [2024-06-21 19:50:38,550 INFO L125 PetriNetUnfolderBase]: For 212681/212684 co-relation queries the response was YES. [2024-06-21 19:50:38,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42319 conditions, 6004 events. 3727/6004 cut-off events. For 212681/212684 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37884 event pairs, 818 based on Foata normal form. 42/6040 useless extension candidates. Maximal degree in co-relation 42217. Up to 4530 conditions per place. [2024-06-21 19:50:38,607 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 202 selfloop transitions, 134 changer transitions 0/341 dead transitions. [2024-06-21 19:50:38,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 341 transitions, 6150 flow [2024-06-21 19:50:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 19:50:38,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 19:50:38,608 INFO L175 Difference]: Start difference. First operand has 198 places, 278 transitions, 4726 flow. Second operand 9 states and 183 transitions. [2024-06-21 19:50:38,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 341 transitions, 6150 flow [2024-06-21 19:50:38,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 341 transitions, 6017 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:38,952 INFO L231 Difference]: Finished difference. Result has 201 places, 281 transitions, 4933 flow [2024-06-21 19:50:38,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4933, PETRI_PLACES=201, PETRI_TRANSITIONS=281} [2024-06-21 19:50:38,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 19:50:38,952 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 281 transitions, 4933 flow [2024-06-21 19:50:38,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:38,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:38,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:38,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:50:38,953 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:38,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1539978187, now seen corresponding path program 4 times [2024-06-21 19:50:38,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:38,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461026404] [2024-06-21 19:50:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:38,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461026404] [2024-06-21 19:50:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461026404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:42,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:42,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502298932] [2024-06-21 19:50:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:42,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:42,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:42,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:42,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 281 transitions, 4933 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:42,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:42,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:42,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:44,742 INFO L124 PetriNetUnfolderBase]: 4033/6516 cut-off events. [2024-06-21 19:50:44,742 INFO L125 PetriNetUnfolderBase]: For 224267/224270 co-relation queries the response was YES. [2024-06-21 19:50:44,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46508 conditions, 6516 events. 4033/6516 cut-off events. For 224267/224270 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42014 event pairs, 852 based on Foata normal form. 20/6531 useless extension candidates. Maximal degree in co-relation 46404. Up to 3800 conditions per place. [2024-06-21 19:50:44,801 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 212 selfloop transitions, 137 changer transitions 0/354 dead transitions. [2024-06-21 19:50:44,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 354 transitions, 6678 flow [2024-06-21 19:50:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:50:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:50:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 19:50:44,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-21 19:50:44,803 INFO L175 Difference]: Start difference. First operand has 201 places, 281 transitions, 4933 flow. Second operand 9 states and 186 transitions. [2024-06-21 19:50:44,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 354 transitions, 6678 flow [2024-06-21 19:50:45,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 354 transitions, 6488 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 19:50:45,175 INFO L231 Difference]: Finished difference. Result has 206 places, 288 transitions, 5223 flow [2024-06-21 19:50:45,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4743, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5223, PETRI_PLACES=206, PETRI_TRANSITIONS=288} [2024-06-21 19:50:45,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 19:50:45,176 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 288 transitions, 5223 flow [2024-06-21 19:50:45,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:45,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:45,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:45,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:50:45,176 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:45,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1817206059, now seen corresponding path program 8 times [2024-06-21 19:50:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:45,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067145211] [2024-06-21 19:50:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:47,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:47,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067145211] [2024-06-21 19:50:47,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067145211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:47,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:47,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:47,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290289905] [2024-06-21 19:50:47,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:47,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:47,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:47,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:47,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:47,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:47,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 288 transitions, 5223 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:47,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:47,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:47,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:49,502 INFO L124 PetriNetUnfolderBase]: 4607/7460 cut-off events. [2024-06-21 19:50:49,502 INFO L125 PetriNetUnfolderBase]: For 258671/258671 co-relation queries the response was YES. [2024-06-21 19:50:49,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52971 conditions, 7460 events. 4607/7460 cut-off events. For 258671/258671 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 49482 event pairs, 1109 based on Foata normal form. 6/7463 useless extension candidates. Maximal degree in co-relation 52865. Up to 5805 conditions per place. [2024-06-21 19:50:49,580 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 243 selfloop transitions, 130 changer transitions 0/378 dead transitions. [2024-06-21 19:50:49,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 378 transitions, 6940 flow [2024-06-21 19:50:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:50:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:50:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 19:50:49,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-21 19:50:49,581 INFO L175 Difference]: Start difference. First operand has 206 places, 288 transitions, 5223 flow. Second operand 11 states and 217 transitions. [2024-06-21 19:50:49,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 378 transitions, 6940 flow [2024-06-21 19:50:50,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 378 transitions, 6729 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 19:50:50,191 INFO L231 Difference]: Finished difference. Result has 212 places, 313 transitions, 5744 flow [2024-06-21 19:50:50,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5014, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5744, PETRI_PLACES=212, PETRI_TRANSITIONS=313} [2024-06-21 19:50:50,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 19:50:50,193 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 313 transitions, 5744 flow [2024-06-21 19:50:50,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:50,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:50,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:50,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:50:50,193 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:50,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:50,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1820063019, now seen corresponding path program 9 times [2024-06-21 19:50:50,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:50,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269217105] [2024-06-21 19:50:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:50,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:52,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:52,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269217105] [2024-06-21 19:50:52,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269217105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:52,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:52,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:50:52,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249849117] [2024-06-21 19:50:52,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:52,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:50:52,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:52,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:50:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:50:52,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:50:52,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 313 transitions, 5744 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:52,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:52,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:50:52,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:54,674 INFO L124 PetriNetUnfolderBase]: 4608/7483 cut-off events. [2024-06-21 19:50:54,675 INFO L125 PetriNetUnfolderBase]: For 272174/272174 co-relation queries the response was YES. [2024-06-21 19:50:54,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54922 conditions, 7483 events. 4608/7483 cut-off events. For 272174/272174 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 49986 event pairs, 1371 based on Foata normal form. 6/7486 useless extension candidates. Maximal degree in co-relation 54813. Up to 6842 conditions per place. [2024-06-21 19:50:54,746 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 259 selfloop transitions, 112 changer transitions 0/376 dead transitions. [2024-06-21 19:50:54,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 376 transitions, 7075 flow [2024-06-21 19:50:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:50:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:50:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 19:50:54,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:50:54,747 INFO L175 Difference]: Start difference. First operand has 212 places, 313 transitions, 5744 flow. Second operand 11 states and 209 transitions. [2024-06-21 19:50:54,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 376 transitions, 7075 flow [2024-06-21 19:50:55,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 376 transitions, 6851 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 19:50:55,223 INFO L231 Difference]: Finished difference. Result has 216 places, 320 transitions, 5937 flow [2024-06-21 19:50:55,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5528, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5937, PETRI_PLACES=216, PETRI_TRANSITIONS=320} [2024-06-21 19:50:55,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 19:50:55,224 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 320 transitions, 5937 flow [2024-06-21 19:50:55,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:55,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:55,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:55,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:50:55,224 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:55,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash -337053363, now seen corresponding path program 10 times [2024-06-21 19:50:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:55,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267076790] [2024-06-21 19:50:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:55,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:50:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:50:56,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:50:56,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267076790] [2024-06-21 19:50:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267076790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:50:56,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:50:56,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:50:56,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676832333] [2024-06-21 19:50:56,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:50:56,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:50:56,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:50:56,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:50:56,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:50:57,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:50:57,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 320 transitions, 5937 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:57,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:50:57,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:50:57,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:50:59,155 INFO L124 PetriNetUnfolderBase]: 4031/7034 cut-off events. [2024-06-21 19:50:59,156 INFO L125 PetriNetUnfolderBase]: For 302166/302507 co-relation queries the response was YES. [2024-06-21 19:50:59,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54044 conditions, 7034 events. 4031/7034 cut-off events. For 302166/302507 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 51278 event pairs, 627 based on Foata normal form. 92/7006 useless extension candidates. Maximal degree in co-relation 53933. Up to 3681 conditions per place. [2024-06-21 19:50:59,226 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 150 changer transitions 0/402 dead transitions. [2024-06-21 19:50:59,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 402 transitions, 7615 flow [2024-06-21 19:50:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:50:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:50:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-21 19:50:59,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-21 19:50:59,228 INFO L175 Difference]: Start difference. First operand has 216 places, 320 transitions, 5937 flow. Second operand 10 states and 216 transitions. [2024-06-21 19:50:59,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 402 transitions, 7615 flow [2024-06-21 19:50:59,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 402 transitions, 7349 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 19:50:59,744 INFO L231 Difference]: Finished difference. Result has 221 places, 345 transitions, 6632 flow [2024-06-21 19:50:59,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6632, PETRI_PLACES=221, PETRI_TRANSITIONS=345} [2024-06-21 19:50:59,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 19:50:59,744 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 345 transitions, 6632 flow [2024-06-21 19:50:59,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:50:59,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:50:59,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:50:59,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:50:59,745 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:50:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:50:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1820067979, now seen corresponding path program 5 times [2024-06-21 19:50:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:50:59,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722271168] [2024-06-21 19:50:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:50:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:50:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:03,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:03,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722271168] [2024-06-21 19:51:03,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722271168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:03,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:03,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:51:03,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978515341] [2024-06-21 19:51:03,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:03,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:51:03,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:03,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:51:03,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:51:03,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:51:03,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 345 transitions, 6632 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:03,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:03,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:51:03,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:05,630 INFO L124 PetriNetUnfolderBase]: 4979/8094 cut-off events. [2024-06-21 19:51:05,630 INFO L125 PetriNetUnfolderBase]: For 317602/317602 co-relation queries the response was YES. [2024-06-21 19:51:05,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60589 conditions, 8094 events. 4979/8094 cut-off events. For 317602/317602 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 54828 event pairs, 1360 based on Foata normal form. 42/8133 useless extension candidates. Maximal degree in co-relation 60474. Up to 6651 conditions per place. [2024-06-21 19:51:05,702 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 276 selfloop transitions, 124 changer transitions 0/405 dead transitions. [2024-06-21 19:51:05,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 405 transitions, 7877 flow [2024-06-21 19:51:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:51:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:51:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 19:51:05,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 19:51:05,704 INFO L175 Difference]: Start difference. First operand has 221 places, 345 transitions, 6632 flow. Second operand 11 states and 210 transitions. [2024-06-21 19:51:05,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 405 transitions, 7877 flow [2024-06-21 19:51:06,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 405 transitions, 7740 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-06-21 19:51:06,291 INFO L231 Difference]: Finished difference. Result has 229 places, 347 transitions, 6838 flow [2024-06-21 19:51:06,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6495, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6838, PETRI_PLACES=229, PETRI_TRANSITIONS=347} [2024-06-21 19:51:06,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 19:51:06,292 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 347 transitions, 6838 flow [2024-06-21 19:51:06,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:06,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:06,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:06,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:51:06,292 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)] === [2024-06-21 19:51:06,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1869681771, now seen corresponding path program 3 times [2024-06-21 19:51:06,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:06,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391111005] [2024-06-21 19:51:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:06,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:08,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391111005] [2024-06-21 19:51:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391111005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:08,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:08,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:51:08,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816885414] [2024-06-21 19:51:08,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:08,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:51:08,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:51:08,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:51:08,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:51:08,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 347 transitions, 6838 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:08,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:08,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:51:08,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:10,619 INFO L124 PetriNetUnfolderBase]: 4944/8025 cut-off events. [2024-06-21 19:51:10,620 INFO L125 PetriNetUnfolderBase]: For 291084/291084 co-relation queries the response was YES. [2024-06-21 19:51:10,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60399 conditions, 8025 events. 4944/8025 cut-off events. For 291084/291084 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 54351 event pairs, 1562 based on Foata normal form. 1/8023 useless extension candidates. Maximal degree in co-relation 60282. Up to 7650 conditions per place. [2024-06-21 19:51:10,708 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 55 changer transitions 0/380 dead transitions. [2024-06-21 19:51:10,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 380 transitions, 7880 flow [2024-06-21 19:51:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:51:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:51:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 19:51:10,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 19:51:10,710 INFO L175 Difference]: Start difference. First operand has 229 places, 347 transitions, 6838 flow. Second operand 7 states and 134 transitions. [2024-06-21 19:51:10,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 380 transitions, 7880 flow [2024-06-21 19:51:11,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 380 transitions, 7691 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 19:51:11,291 INFO L231 Difference]: Finished difference. Result has 231 places, 350 transitions, 6920 flow [2024-06-21 19:51:11,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6661, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6920, PETRI_PLACES=231, PETRI_TRANSITIONS=350} [2024-06-21 19:51:11,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 19:51:11,291 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 350 transitions, 6920 flow [2024-06-21 19:51:11,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:11,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:11,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:51:11,292 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)] === [2024-06-21 19:51:11,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash 953513577, now seen corresponding path program 1 times [2024-06-21 19:51:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:11,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616263392] [2024-06-21 19:51:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:13,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:13,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616263392] [2024-06-21 19:51:13,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616263392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:13,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:13,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:51:13,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784462994] [2024-06-21 19:51:13,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:13,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:51:13,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:13,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:51:13,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:51:13,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:51:13,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 350 transitions, 6920 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:13,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:13,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:51:13,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:15,825 INFO L124 PetriNetUnfolderBase]: 4702/7798 cut-off events. [2024-06-21 19:51:15,825 INFO L125 PetriNetUnfolderBase]: For 302131/302173 co-relation queries the response was YES. [2024-06-21 19:51:15,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56807 conditions, 7798 events. 4702/7798 cut-off events. For 302131/302173 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 54703 event pairs, 2243 based on Foata normal form. 6/7771 useless extension candidates. Maximal degree in co-relation 56688. Up to 6852 conditions per place. [2024-06-21 19:51:15,910 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 26 changer transitions 0/378 dead transitions. [2024-06-21 19:51:15,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 378 transitions, 7758 flow [2024-06-21 19:51:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:51:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:51:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 19:51:15,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:51:15,911 INFO L175 Difference]: Start difference. First operand has 231 places, 350 transitions, 6920 flow. Second operand 6 states and 114 transitions. [2024-06-21 19:51:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 378 transitions, 7758 flow [2024-06-21 19:51:16,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 378 transitions, 7666 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 19:51:16,571 INFO L231 Difference]: Finished difference. Result has 234 places, 358 transitions, 6987 flow [2024-06-21 19:51:16,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6987, PETRI_PLACES=234, PETRI_TRANSITIONS=358} [2024-06-21 19:51:16,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 19:51:16,572 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 358 transitions, 6987 flow [2024-06-21 19:51:16,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:16,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:16,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:16,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:51:16,572 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:51:16,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:16,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1645553547, now seen corresponding path program 2 times [2024-06-21 19:51:16,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:16,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410765272] [2024-06-21 19:51:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:16,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:19,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:19,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410765272] [2024-06-21 19:51:19,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410765272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:19,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:19,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:51:19,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412637049] [2024-06-21 19:51:19,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:51:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:51:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:51:19,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:51:19,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 358 transitions, 6987 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:19,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:19,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:51:19,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:21,494 INFO L124 PetriNetUnfolderBase]: 4684/7781 cut-off events. [2024-06-21 19:51:21,494 INFO L125 PetriNetUnfolderBase]: For 306445/306487 co-relation queries the response was YES. [2024-06-21 19:51:21,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57072 conditions, 7781 events. 4684/7781 cut-off events. For 306445/306487 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54639 event pairs, 2234 based on Foata normal form. 6/7757 useless extension candidates. Maximal degree in co-relation 56951. Up to 6879 conditions per place. [2024-06-21 19:51:21,570 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 263 selfloop transitions, 17 changer transitions 0/371 dead transitions. [2024-06-21 19:51:21,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 371 transitions, 7599 flow [2024-06-21 19:51:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:51:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:51:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 19:51:21,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-21 19:51:21,571 INFO L175 Difference]: Start difference. First operand has 234 places, 358 transitions, 6987 flow. Second operand 7 states and 114 transitions. [2024-06-21 19:51:21,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 371 transitions, 7599 flow [2024-06-21 19:51:22,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 371 transitions, 7541 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 19:51:22,098 INFO L231 Difference]: Finished difference. Result has 239 places, 358 transitions, 6972 flow [2024-06-21 19:51:22,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6972, PETRI_PLACES=239, PETRI_TRANSITIONS=358} [2024-06-21 19:51:22,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 19:51:22,099 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 358 transitions, 6972 flow [2024-06-21 19:51:22,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:22,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:22,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:22,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:51:22,100 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)] === [2024-06-21 19:51:22,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash -712717654, now seen corresponding path program 1 times [2024-06-21 19:51:22,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:22,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862540010] [2024-06-21 19:51:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:22,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:25,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:25,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862540010] [2024-06-21 19:51:25,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862540010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:25,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:25,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253069350] [2024-06-21 19:51:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:25,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:25,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:25,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:25,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:25,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:51:25,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 358 transitions, 6972 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:25,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:25,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:51:25,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:27,633 INFO L124 PetriNetUnfolderBase]: 4966/8072 cut-off events. [2024-06-21 19:51:27,633 INFO L125 PetriNetUnfolderBase]: For 312287/312287 co-relation queries the response was YES. [2024-06-21 19:51:27,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60893 conditions, 8072 events. 4966/8072 cut-off events. For 312287/312287 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 54864 event pairs, 1768 based on Foata normal form. 2/8071 useless extension candidates. Maximal degree in co-relation 60769. Up to 7644 conditions per place. [2024-06-21 19:51:27,720 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 333 selfloop transitions, 64 changer transitions 0/402 dead transitions. [2024-06-21 19:51:27,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 402 transitions, 8229 flow [2024-06-21 19:51:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:51:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:51:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:51:27,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:51:27,722 INFO L175 Difference]: Start difference. First operand has 239 places, 358 transitions, 6972 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:51:27,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 402 transitions, 8229 flow [2024-06-21 19:51:28,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 402 transitions, 8145 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 19:51:28,360 INFO L231 Difference]: Finished difference. Result has 243 places, 370 transitions, 7169 flow [2024-06-21 19:51:28,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6900, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7169, PETRI_PLACES=243, PETRI_TRANSITIONS=370} [2024-06-21 19:51:28,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 19:51:28,361 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 370 transitions, 7169 flow [2024-06-21 19:51:28,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:28,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:28,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:28,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:51:28,362 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)] === [2024-06-21 19:51:28,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:28,362 INFO L85 PathProgramCache]: Analyzing trace with hash -527661624, now seen corresponding path program 2 times [2024-06-21 19:51:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:28,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726112929] [2024-06-21 19:51:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:28,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:31,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:31,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726112929] [2024-06-21 19:51:31,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726112929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:31,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:31,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:31,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958416567] [2024-06-21 19:51:31,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:31,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:31,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:31,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:31,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:31,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:51:31,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 370 transitions, 7169 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:31,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:31,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:51:31,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:34,170 INFO L124 PetriNetUnfolderBase]: 5007/8126 cut-off events. [2024-06-21 19:51:34,170 INFO L125 PetriNetUnfolderBase]: For 330189/330189 co-relation queries the response was YES. [2024-06-21 19:51:34,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62236 conditions, 8126 events. 5007/8126 cut-off events. For 330189/330189 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 55040 event pairs, 1776 based on Foata normal form. 4/8121 useless extension candidates. Maximal degree in co-relation 62111. Up to 7657 conditions per place. [2024-06-21 19:51:34,273 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 334 selfloop transitions, 75 changer transitions 0/414 dead transitions. [2024-06-21 19:51:34,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 414 transitions, 8571 flow [2024-06-21 19:51:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:51:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:51:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 19:51:34,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 19:51:34,274 INFO L175 Difference]: Start difference. First operand has 243 places, 370 transitions, 7169 flow. Second operand 8 states and 146 transitions. [2024-06-21 19:51:34,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 414 transitions, 8571 flow [2024-06-21 19:51:35,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 414 transitions, 8422 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 19:51:35,204 INFO L231 Difference]: Finished difference. Result has 248 places, 384 transitions, 7363 flow [2024-06-21 19:51:35,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7363, PETRI_PLACES=248, PETRI_TRANSITIONS=384} [2024-06-21 19:51:35,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 19:51:35,204 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 384 transitions, 7363 flow [2024-06-21 19:51:35,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:35,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:35,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:35,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:51:35,205 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)] === [2024-06-21 19:51:35,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:35,206 INFO L85 PathProgramCache]: Analyzing trace with hash -358038904, now seen corresponding path program 3 times [2024-06-21 19:51:35,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:35,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367132874] [2024-06-21 19:51:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:35,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:39,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:39,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367132874] [2024-06-21 19:51:39,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367132874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:39,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:39,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:39,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769980609] [2024-06-21 19:51:39,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:39,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:39,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:39,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:51:39,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 384 transitions, 7363 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:39,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:39,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:51:39,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:41,553 INFO L124 PetriNetUnfolderBase]: 5001/8122 cut-off events. [2024-06-21 19:51:41,554 INFO L125 PetriNetUnfolderBase]: For 337493/337493 co-relation queries the response was YES. [2024-06-21 19:51:41,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62873 conditions, 8122 events. 5001/8122 cut-off events. For 337493/337493 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 55375 event pairs, 2266 based on Foata normal form. 2/8121 useless extension candidates. Maximal degree in co-relation 62745. Up to 7836 conditions per place. [2024-06-21 19:51:41,645 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 22 changer transitions 0/399 dead transitions. [2024-06-21 19:51:41,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 399 transitions, 8253 flow [2024-06-21 19:51:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:51:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:51:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 19:51:41,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-21 19:51:41,646 INFO L175 Difference]: Start difference. First operand has 248 places, 384 transitions, 7363 flow. Second operand 7 states and 109 transitions. [2024-06-21 19:51:41,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 399 transitions, 8253 flow [2024-06-21 19:51:42,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 399 transitions, 8154 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-21 19:51:42,461 INFO L231 Difference]: Finished difference. Result has 253 places, 388 transitions, 7394 flow [2024-06-21 19:51:42,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7274, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7394, PETRI_PLACES=253, PETRI_TRANSITIONS=388} [2024-06-21 19:51:42,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 19:51:42,462 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 388 transitions, 7394 flow [2024-06-21 19:51:42,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:42,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:42,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:42,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:51:42,463 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:51:42,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:42,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1858718491, now seen corresponding path program 1 times [2024-06-21 19:51:42,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:42,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174162944] [2024-06-21 19:51:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:42,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:45,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:45,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174162944] [2024-06-21 19:51:45,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174162944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:45,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:45,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:51:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046320415] [2024-06-21 19:51:45,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:45,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:51:45,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:51:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:51:45,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 19:51:45,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 388 transitions, 7394 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:45,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:45,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 19:51:45,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:47,410 INFO L124 PetriNetUnfolderBase]: 4044/7054 cut-off events. [2024-06-21 19:51:47,411 INFO L125 PetriNetUnfolderBase]: For 346739/347036 co-relation queries the response was YES. [2024-06-21 19:51:47,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56202 conditions, 7054 events. 4044/7054 cut-off events. For 346739/347036 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 51635 event pairs, 601 based on Foata normal form. 92/7014 useless extension candidates. Maximal degree in co-relation 56072. Up to 3754 conditions per place. [2024-06-21 19:51:47,486 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 139 changer transitions 0/443 dead transitions. [2024-06-21 19:51:47,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 443 transitions, 8462 flow [2024-06-21 19:51:47,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:51:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:51:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 19:51:47,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2024-06-21 19:51:47,488 INFO L175 Difference]: Start difference. First operand has 253 places, 388 transitions, 7394 flow. Second operand 10 states and 209 transitions. [2024-06-21 19:51:47,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 443 transitions, 8462 flow [2024-06-21 19:51:48,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 443 transitions, 8367 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 19:51:48,207 INFO L231 Difference]: Finished difference. Result has 257 places, 389 transitions, 7590 flow [2024-06-21 19:51:48,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7221, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7590, PETRI_PLACES=257, PETRI_TRANSITIONS=389} [2024-06-21 19:51:48,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 19:51:48,208 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 389 transitions, 7590 flow [2024-06-21 19:51:48,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:51:48,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:48,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:48,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:51:48,208 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:51:48,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:48,209 INFO L85 PathProgramCache]: Analyzing trace with hash -527231034, now seen corresponding path program 1 times [2024-06-21 19:51:48,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:48,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182137980] [2024-06-21 19:51:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:48,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:53,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:53,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182137980] [2024-06-21 19:51:53,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182137980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:53,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:53,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:51:53,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679426533] [2024-06-21 19:51:53,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:53,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:51:53,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:53,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:51:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:51:53,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:51:53,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 389 transitions, 7590 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) [2024-06-21 19:51:53,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:53,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:51:53,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:51:55,231 INFO L124 PetriNetUnfolderBase]: 5031/8178 cut-off events. [2024-06-21 19:51:55,231 INFO L125 PetriNetUnfolderBase]: For 343269/343269 co-relation queries the response was YES. [2024-06-21 19:51:55,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63692 conditions, 8178 events. 5031/8178 cut-off events. For 343269/343269 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 55821 event pairs, 2304 based on Foata normal form. 2/8177 useless extension candidates. Maximal degree in co-relation 63561. Up to 7899 conditions per place. [2024-06-21 19:51:55,329 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 381 selfloop transitions, 16 changer transitions 0/402 dead transitions. [2024-06-21 19:51:55,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 402 transitions, 8450 flow [2024-06-21 19:51:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:51:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:51:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-21 19:51:55,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-21 19:51:55,330 INFO L175 Difference]: Start difference. First operand has 257 places, 389 transitions, 7590 flow. Second operand 7 states and 106 transitions. [2024-06-21 19:51:55,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 402 transitions, 8450 flow [2024-06-21 19:51:56,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 402 transitions, 8249 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 19:51:56,104 INFO L231 Difference]: Finished difference. Result has 258 places, 391 transitions, 7462 flow [2024-06-21 19:51:56,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7389, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7462, PETRI_PLACES=258, PETRI_TRANSITIONS=391} [2024-06-21 19:51:56,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 19:51:56,105 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 391 transitions, 7462 flow [2024-06-21 19:51:56,105 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) [2024-06-21 19:51:56,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:51:56,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:51:56,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:51:56,106 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:51:56,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:51:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1259210122, now seen corresponding path program 1 times [2024-06-21 19:51:56,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:51:56,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389572343] [2024-06-21 19:51:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:51:56,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:51:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:51:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:51:59,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:51:59,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389572343] [2024-06-21 19:51:59,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389572343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:51:59,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:51:59,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:51:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46835902] [2024-06-21 19:51:59,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:51:59,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:51:59,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:51:59,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:51:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:51:59,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:51:59,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 391 transitions, 7462 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) [2024-06-21 19:51:59,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:51:59,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:51:59,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:01,582 INFO L124 PetriNetUnfolderBase]: 5025/8175 cut-off events. [2024-06-21 19:52:01,583 INFO L125 PetriNetUnfolderBase]: For 339415/339421 co-relation queries the response was YES. [2024-06-21 19:52:01,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62627 conditions, 8175 events. 5025/8175 cut-off events. For 339415/339421 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55790 event pairs, 1859 based on Foata normal form. 8/8174 useless extension candidates. Maximal degree in co-relation 62496. Up to 7619 conditions per place. [2024-06-21 19:52:01,663 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 84 changer transitions 0/429 dead transitions. [2024-06-21 19:52:01,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 429 transitions, 8941 flow [2024-06-21 19:52:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:52:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:52:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 19:52:01,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 19:52:01,665 INFO L175 Difference]: Start difference. First operand has 258 places, 391 transitions, 7462 flow. Second operand 7 states and 132 transitions. [2024-06-21 19:52:01,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 429 transitions, 8941 flow [2024-06-21 19:52:02,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 429 transitions, 8884 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 19:52:02,546 INFO L231 Difference]: Finished difference. Result has 261 places, 402 transitions, 7837 flow [2024-06-21 19:52:02,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7405, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7837, PETRI_PLACES=261, PETRI_TRANSITIONS=402} [2024-06-21 19:52:02,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 19:52:02,547 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 402 transitions, 7837 flow [2024-06-21 19:52:02,547 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) [2024-06-21 19:52:02,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:02,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:52:02,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:52:02,547 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:52:02,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2016084286, now seen corresponding path program 2 times [2024-06-21 19:52:02,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:02,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797784847] [2024-06-21 19:52:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:02,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:05,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:05,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797784847] [2024-06-21 19:52:05,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797784847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:05,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:05,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:52:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386832568] [2024-06-21 19:52:05,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:05,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:52:05,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:52:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:52:05,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:52:05,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 402 transitions, 7837 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) [2024-06-21 19:52:05,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:05,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:52:05,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:08,100 INFO L124 PetriNetUnfolderBase]: 4996/8114 cut-off events. [2024-06-21 19:52:08,101 INFO L125 PetriNetUnfolderBase]: For 341845/341845 co-relation queries the response was YES. [2024-06-21 19:52:08,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62604 conditions, 8114 events. 4996/8114 cut-off events. For 341845/341845 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55044 event pairs, 1545 based on Foata normal form. 4/8106 useless extension candidates. Maximal degree in co-relation 62470. Up to 7644 conditions per place. [2024-06-21 19:52:08,184 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 76 changer transitions 0/430 dead transitions. [2024-06-21 19:52:08,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 430 transitions, 8876 flow [2024-06-21 19:52:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:52:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:52:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:52:08,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 19:52:08,186 INFO L175 Difference]: Start difference. First operand has 261 places, 402 transitions, 7837 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:52:08,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 430 transitions, 8876 flow [2024-06-21 19:52:09,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 430 transitions, 8791 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 19:52:09,041 INFO L231 Difference]: Finished difference. Result has 267 places, 402 transitions, 7937 flow [2024-06-21 19:52:09,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7752, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7937, PETRI_PLACES=267, PETRI_TRANSITIONS=402} [2024-06-21 19:52:09,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 19:52:09,041 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 402 transitions, 7937 flow [2024-06-21 19:52:09,041 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) [2024-06-21 19:52:09,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:09,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:52:09,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:52:09,042 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:52:09,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash -619409528, now seen corresponding path program 1 times [2024-06-21 19:52:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270772421] [2024-06-21 19:52:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:12,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:12,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270772421] [2024-06-21 19:52:12,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270772421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:12,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:12,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:52:12,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815745885] [2024-06-21 19:52:12,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:12,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:52:12,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:52:12,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:52:12,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:52:12,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 402 transitions, 7937 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) [2024-06-21 19:52:12,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:12,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:52:12,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:14,860 INFO L124 PetriNetUnfolderBase]: 4995/8113 cut-off events. [2024-06-21 19:52:14,861 INFO L125 PetriNetUnfolderBase]: For 348390/348390 co-relation queries the response was YES. [2024-06-21 19:52:14,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62933 conditions, 8113 events. 4995/8113 cut-off events. For 348390/348390 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 55213 event pairs, 1818 based on Foata normal form. 2/8112 useless extension candidates. Maximal degree in co-relation 62796. Up to 7660 conditions per place. [2024-06-21 19:52:14,954 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 347 selfloop transitions, 87 changer transitions 0/439 dead transitions. [2024-06-21 19:52:14,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 439 transitions, 9144 flow [2024-06-21 19:52:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:52:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:52:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 19:52:14,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 19:52:14,956 INFO L175 Difference]: Start difference. First operand has 267 places, 402 transitions, 7937 flow. Second operand 9 states and 161 transitions. [2024-06-21 19:52:14,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 439 transitions, 9144 flow [2024-06-21 19:52:16,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 439 transitions, 9021 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 19:52:16,033 INFO L231 Difference]: Finished difference. Result has 273 places, 408 transitions, 8092 flow [2024-06-21 19:52:16,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7814, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8092, PETRI_PLACES=273, PETRI_TRANSITIONS=408} [2024-06-21 19:52:16,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 19:52:16,034 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 408 transitions, 8092 flow [2024-06-21 19:52:16,034 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) [2024-06-21 19:52:16,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:16,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:52:16,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:52:16,034 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:52:16,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:16,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1972219528, now seen corresponding path program 3 times [2024-06-21 19:52:16,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:16,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597600427] [2024-06-21 19:52:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:16,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:18,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:18,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597600427] [2024-06-21 19:52:18,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597600427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:18,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:18,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:52:18,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844949247] [2024-06-21 19:52:18,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:18,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:52:18,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:18,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:52:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:52:19,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:52:19,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 408 transitions, 8092 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) [2024-06-21 19:52:19,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:19,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:52:19,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:21,477 INFO L124 PetriNetUnfolderBase]: 4995/8111 cut-off events. [2024-06-21 19:52:21,477 INFO L125 PetriNetUnfolderBase]: For 359378/359378 co-relation queries the response was YES. [2024-06-21 19:52:21,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63092 conditions, 8111 events. 4995/8111 cut-off events. For 359378/359378 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 55125 event pairs, 1858 based on Foata normal form. 4/8106 useless extension candidates. Maximal degree in co-relation 62954. Up to 7578 conditions per place. [2024-06-21 19:52:21,575 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 87 changer transitions 0/435 dead transitions. [2024-06-21 19:52:21,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 435 transitions, 9327 flow [2024-06-21 19:52:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:52:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:52:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 19:52:21,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 19:52:21,577 INFO L175 Difference]: Start difference. First operand has 273 places, 408 transitions, 8092 flow. Second operand 7 states and 127 transitions. [2024-06-21 19:52:21,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 435 transitions, 9327 flow [2024-06-21 19:52:22,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 435 transitions, 9136 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 19:52:22,501 INFO L231 Difference]: Finished difference. Result has 274 places, 411 transitions, 8139 flow [2024-06-21 19:52:22,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7905, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8139, PETRI_PLACES=274, PETRI_TRANSITIONS=411} [2024-06-21 19:52:22,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 19:52:22,501 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 411 transitions, 8139 flow [2024-06-21 19:52:22,501 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) [2024-06-21 19:52:22,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:22,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:52:22,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:52:22,502 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)] === [2024-06-21 19:52:22,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1498539112, now seen corresponding path program 4 times [2024-06-21 19:52:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:22,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702091480] [2024-06-21 19:52:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:22,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:25,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:25,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702091480] [2024-06-21 19:52:25,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702091480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:25,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:25,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:52:25,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532455655] [2024-06-21 19:52:25,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:25,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:52:25,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:52:25,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:52:25,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:52:25,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 411 transitions, 8139 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) [2024-06-21 19:52:25,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:25,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:52:25,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:27,946 INFO L124 PetriNetUnfolderBase]: 5005/8127 cut-off events. [2024-06-21 19:52:27,947 INFO L125 PetriNetUnfolderBase]: For 354932/354932 co-relation queries the response was YES. [2024-06-21 19:52:28,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63227 conditions, 8127 events. 5005/8127 cut-off events. For 354932/354932 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 55245 event pairs, 1879 based on Foata normal form. 2/8120 useless extension candidates. Maximal degree in co-relation 63087. Up to 7588 conditions per place. [2024-06-21 19:52:28,040 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 98 changer transitions 0/435 dead transitions. [2024-06-21 19:52:28,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 435 transitions, 9376 flow [2024-06-21 19:52:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:52:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:52:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 19:52:28,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 19:52:28,041 INFO L175 Difference]: Start difference. First operand has 274 places, 411 transitions, 8139 flow. Second operand 7 states and 123 transitions. [2024-06-21 19:52:28,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 435 transitions, 9376 flow [2024-06-21 19:52:28,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 435 transitions, 9178 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 19:52:28,928 INFO L231 Difference]: Finished difference. Result has 278 places, 415 transitions, 8214 flow [2024-06-21 19:52:28,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7946, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8214, PETRI_PLACES=278, PETRI_TRANSITIONS=415} [2024-06-21 19:52:28,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 19:52:28,929 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 415 transitions, 8214 flow [2024-06-21 19:52:28,929 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) [2024-06-21 19:52:28,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:28,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:52:28,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:52:28,929 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)] === [2024-06-21 19:52:28,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1355426372, now seen corresponding path program 5 times [2024-06-21 19:52:28,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:28,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892553764] [2024-06-21 19:52:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:28,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:32,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:32,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892553764] [2024-06-21 19:52:32,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892553764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:32,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:32,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:52:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963503249] [2024-06-21 19:52:32,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:32,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:52:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:52:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:52:32,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:52:32,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 415 transitions, 8214 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) [2024-06-21 19:52:32,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:32,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:52:32,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:34,749 INFO L124 PetriNetUnfolderBase]: 4982/8106 cut-off events. [2024-06-21 19:52:34,750 INFO L125 PetriNetUnfolderBase]: For 359451/359451 co-relation queries the response was YES. [2024-06-21 19:52:34,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62977 conditions, 8106 events. 4982/8106 cut-off events. For 359451/359451 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 55044 event pairs, 1544 based on Foata normal form. 2/8096 useless extension candidates. Maximal degree in co-relation 62834. Up to 7524 conditions per place. [2024-06-21 19:52:34,846 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 108 changer transitions 0/442 dead transitions. [2024-06-21 19:52:34,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 442 transitions, 9420 flow [2024-06-21 19:52:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:52:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:52:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 19:52:34,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 19:52:34,848 INFO L175 Difference]: Start difference. First operand has 278 places, 415 transitions, 8214 flow. Second operand 8 states and 139 transitions. [2024-06-21 19:52:34,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 442 transitions, 9420 flow [2024-06-21 19:52:35,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 442 transitions, 9270 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 19:52:35,801 INFO L231 Difference]: Finished difference. Result has 284 places, 418 transitions, 8438 flow [2024-06-21 19:52:35,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8438, PETRI_PLACES=284, PETRI_TRANSITIONS=418} [2024-06-21 19:52:35,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-21 19:52:35,802 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 418 transitions, 8438 flow [2024-06-21 19:52:35,802 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) [2024-06-21 19:52:35,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:35,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:52:35,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:52:35,802 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)] === [2024-06-21 19:52:35,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1772803176, now seen corresponding path program 6 times [2024-06-21 19:52:35,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:35,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870944188] [2024-06-21 19:52:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:38,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:38,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870944188] [2024-06-21 19:52:38,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870944188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:38,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:38,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:52:38,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670180672] [2024-06-21 19:52:38,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:38,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:52:38,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:38,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:52:38,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:52:38,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:52:38,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 418 transitions, 8438 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) [2024-06-21 19:52:38,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:38,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:52:38,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:41,328 INFO L124 PetriNetUnfolderBase]: 4969/8083 cut-off events. [2024-06-21 19:52:41,329 INFO L125 PetriNetUnfolderBase]: For 369099/369099 co-relation queries the response was YES. [2024-06-21 19:52:41,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63281 conditions, 8083 events. 4969/8083 cut-off events. For 369099/369099 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 54899 event pairs, 1542 based on Foata normal form. 2/8073 useless extension candidates. Maximal degree in co-relation 63135. Up to 7500 conditions per place. [2024-06-21 19:52:41,416 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 112 changer transitions 0/448 dead transitions. [2024-06-21 19:52:41,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 448 transitions, 9692 flow [2024-06-21 19:52:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:52:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:52:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 19:52:41,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-21 19:52:41,417 INFO L175 Difference]: Start difference. First operand has 284 places, 418 transitions, 8438 flow. Second operand 10 states and 166 transitions. [2024-06-21 19:52:41,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 448 transitions, 9692 flow [2024-06-21 19:52:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 448 transitions, 9518 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 19:52:42,435 INFO L231 Difference]: Finished difference. Result has 289 places, 421 transitions, 8593 flow [2024-06-21 19:52:42,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8267, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8593, PETRI_PLACES=289, PETRI_TRANSITIONS=421} [2024-06-21 19:52:42,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 19:52:42,435 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 421 transitions, 8593 flow [2024-06-21 19:52:42,435 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) [2024-06-21 19:52:42,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:42,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:52:42,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:52:42,436 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)] === [2024-06-21 19:52:42,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1755311322, now seen corresponding path program 7 times [2024-06-21 19:52:42,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:42,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014303709] [2024-06-21 19:52:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:45,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:45,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014303709] [2024-06-21 19:52:45,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014303709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:45,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:45,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:52:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494782442] [2024-06-21 19:52:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:45,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:52:45,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:52:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:52:45,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:52:45,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 421 transitions, 8593 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) [2024-06-21 19:52:45,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:45,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:52:45,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:47,589 INFO L124 PetriNetUnfolderBase]: 4963/8074 cut-off events. [2024-06-21 19:52:47,589 INFO L125 PetriNetUnfolderBase]: For 376983/376986 co-relation queries the response was YES. [2024-06-21 19:52:47,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63303 conditions, 8074 events. 4963/8074 cut-off events. For 376983/376986 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 55082 event pairs, 1849 based on Foata normal form. 4/8073 useless extension candidates. Maximal degree in co-relation 63156. Up to 7529 conditions per place. [2024-06-21 19:52:47,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 363 selfloop transitions, 91 changer transitions 0/459 dead transitions. [2024-06-21 19:52:47,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 459 transitions, 9827 flow [2024-06-21 19:52:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:52:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:52:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 19:52:47,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 19:52:47,687 INFO L175 Difference]: Start difference. First operand has 289 places, 421 transitions, 8593 flow. Second operand 7 states and 142 transitions. [2024-06-21 19:52:47,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 459 transitions, 9827 flow [2024-06-21 19:52:48,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 459 transitions, 9577 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 19:52:48,893 INFO L231 Difference]: Finished difference. Result has 288 places, 423 transitions, 8560 flow [2024-06-21 19:52:48,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8343, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8560, PETRI_PLACES=288, PETRI_TRANSITIONS=423} [2024-06-21 19:52:48,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 19:52:48,893 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 423 transitions, 8560 flow [2024-06-21 19:52:48,893 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) [2024-06-21 19:52:48,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:48,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:52:48,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:52:48,893 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)] === [2024-06-21 19:52:48,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1467884810, now seen corresponding path program 8 times [2024-06-21 19:52:48,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:48,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392418333] [2024-06-21 19:52:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:48,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:51,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:51,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392418333] [2024-06-21 19:52:51,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392418333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:51,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:51,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:52:51,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021470713] [2024-06-21 19:52:51,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:51,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:52:51,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:52:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:52:51,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:52:51,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 423 transitions, 8560 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) [2024-06-21 19:52:51,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:51,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:52:51,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:52:53,763 INFO L124 PetriNetUnfolderBase]: 4940/8021 cut-off events. [2024-06-21 19:52:53,763 INFO L125 PetriNetUnfolderBase]: For 377726/377726 co-relation queries the response was YES. [2024-06-21 19:52:53,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62851 conditions, 8021 events. 4940/8021 cut-off events. For 377726/377726 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54451 event pairs, 1577 based on Foata normal form. 2/8020 useless extension candidates. Maximal degree in co-relation 62704. Up to 7542 conditions per place. [2024-06-21 19:52:53,857 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 368 selfloop transitions, 89 changer transitions 0/462 dead transitions. [2024-06-21 19:52:53,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 462 transitions, 9799 flow [2024-06-21 19:52:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:52:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:52:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 19:52:53,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:52:53,859 INFO L175 Difference]: Start difference. First operand has 288 places, 423 transitions, 8560 flow. Second operand 8 states and 152 transitions. [2024-06-21 19:52:53,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 462 transitions, 9799 flow [2024-06-21 19:52:55,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 462 transitions, 9664 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 19:52:55,033 INFO L231 Difference]: Finished difference. Result has 293 places, 426 transitions, 8760 flow [2024-06-21 19:52:55,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8425, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8760, PETRI_PLACES=293, PETRI_TRANSITIONS=426} [2024-06-21 19:52:55,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 19:52:55,034 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 426 transitions, 8760 flow [2024-06-21 19:52:55,034 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) [2024-06-21 19:52:55,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:52:55,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:52:55,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:52:55,034 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)] === [2024-06-21 19:52:55,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:52:55,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1495691080, now seen corresponding path program 1 times [2024-06-21 19:52:55,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:52:55,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130510908] [2024-06-21 19:52:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:52:55,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:52:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:52:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:52:58,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:52:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130510908] [2024-06-21 19:52:58,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130510908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:52:58,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:52:58,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:52:58,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630921861] [2024-06-21 19:52:58,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:52:58,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:52:58,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:52:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:52:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:52:58,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:52:58,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 426 transitions, 8760 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:52:58,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:52:58,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:52:58,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:53:01,266 INFO L124 PetriNetUnfolderBase]: 4757/7875 cut-off events. [2024-06-21 19:53:01,266 INFO L125 PetriNetUnfolderBase]: For 420343/420385 co-relation queries the response was YES. [2024-06-21 19:53:01,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60788 conditions, 7875 events. 4757/7875 cut-off events. For 420343/420385 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 54960 event pairs, 2274 based on Foata normal form. 10/7852 useless extension candidates. Maximal degree in co-relation 60640. Up to 6846 conditions per place. [2024-06-21 19:53:01,359 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 329 selfloop transitions, 32 changer transitions 0/461 dead transitions. [2024-06-21 19:53:01,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 461 transitions, 9794 flow [2024-06-21 19:53:01,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:53:01,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:53:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 19:53:01,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:53:01,360 INFO L175 Difference]: Start difference. First operand has 293 places, 426 transitions, 8760 flow. Second operand 8 states and 144 transitions. [2024-06-21 19:53:01,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 461 transitions, 9794 flow [2024-06-21 19:53:02,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 461 transitions, 9673 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 19:53:02,415 INFO L231 Difference]: Finished difference. Result has 296 places, 429 transitions, 8760 flow [2024-06-21 19:53:02,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8639, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8760, PETRI_PLACES=296, PETRI_TRANSITIONS=429} [2024-06-21 19:53:02,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 19:53:02,415 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 429 transitions, 8760 flow [2024-06-21 19:53:02,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:53:02,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:53:02,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:53:02,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:53:02,416 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)] === [2024-06-21 19:53:02,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:53:02,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1495751530, now seen corresponding path program 2 times [2024-06-21 19:53:02,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:53:02,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224184465] [2024-06-21 19:53:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:53:02,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:53:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:53:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:53:06,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:53:06,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224184465] [2024-06-21 19:53:06,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224184465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:53:06,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:53:06,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:53:06,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153968789] [2024-06-21 19:53:06,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:53:06,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:53:06,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:53:06,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:53:06,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:53:06,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:53:06,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 429 transitions, 8760 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:53:06,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:53:06,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:53:06,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:53:08,822 INFO L124 PetriNetUnfolderBase]: 4806/7948 cut-off events. [2024-06-21 19:53:08,822 INFO L125 PetriNetUnfolderBase]: For 438460/438502 co-relation queries the response was YES. [2024-06-21 19:53:08,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61381 conditions, 7948 events. 4806/7948 cut-off events. For 438460/438502 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 55804 event pairs, 2327 based on Foata normal form. 14/7929 useless extension candidates. Maximal degree in co-relation 61232. Up to 7016 conditions per place. [2024-06-21 19:53:08,920 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 326 selfloop transitions, 30 changer transitions 0/456 dead transitions. [2024-06-21 19:53:08,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 456 transitions, 9642 flow [2024-06-21 19:53:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:53:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:53:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 19:53:08,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 19:53:08,922 INFO L175 Difference]: Start difference. First operand has 296 places, 429 transitions, 8760 flow. Second operand 8 states and 138 transitions. [2024-06-21 19:53:08,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 456 transitions, 9642 flow [2024-06-21 19:53:10,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 456 transitions, 9584 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 19:53:10,087 INFO L231 Difference]: Finished difference. Result has 300 places, 431 transitions, 8809 flow [2024-06-21 19:53:10,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8708, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8809, PETRI_PLACES=300, PETRI_TRANSITIONS=431} [2024-06-21 19:53:10,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 19:53:10,088 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 431 transitions, 8809 flow [2024-06-21 19:53:10,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:53:10,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:53:10,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:53:10,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:53:10,089 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)] === [2024-06-21 19:53:10,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:53:10,089 INFO L85 PathProgramCache]: Analyzing trace with hash 829028330, now seen corresponding path program 3 times [2024-06-21 19:53:10,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:53:10,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69947326] [2024-06-21 19:53:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:53:10,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:53:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:53:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:53:15,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:53:15,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69947326] [2024-06-21 19:53:15,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69947326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:53:15,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:53:15,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:53:15,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613430034] [2024-06-21 19:53:15,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:53:15,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:53:15,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:53:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:53:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:53:15,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:53:15,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 431 transitions, 8809 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) [2024-06-21 19:53:15,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:53:15,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:53:15,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:53:18,098 INFO L124 PetriNetUnfolderBase]: 5133/8308 cut-off events. [2024-06-21 19:53:18,098 INFO L125 PetriNetUnfolderBase]: For 446024/446024 co-relation queries the response was YES. [2024-06-21 19:53:18,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65367 conditions, 8308 events. 5133/8308 cut-off events. For 446024/446024 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 56634 event pairs, 2367 based on Foata normal form. 14/8319 useless extension candidates. Maximal degree in co-relation 65217. Up to 7975 conditions per place. [2024-06-21 19:53:18,189 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 23 changer transitions 0/455 dead transitions. [2024-06-21 19:53:18,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 455 transitions, 9881 flow [2024-06-21 19:53:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:53:18,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:53:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 19:53:18,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:53:18,190 INFO L175 Difference]: Start difference. First operand has 300 places, 431 transitions, 8809 flow. Second operand 8 states and 126 transitions. [2024-06-21 19:53:18,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 455 transitions, 9881 flow [2024-06-21 19:53:19,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 455 transitions, 9784 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 19:53:19,360 INFO L231 Difference]: Finished difference. Result has 302 places, 436 transitions, 8861 flow [2024-06-21 19:53:19,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8721, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8861, PETRI_PLACES=302, PETRI_TRANSITIONS=436} [2024-06-21 19:53:19,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-21 19:53:19,361 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 436 transitions, 8861 flow [2024-06-21 19:53:19,361 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) [2024-06-21 19:53:19,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:53:19,361 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] [2024-06-21 19:53:19,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:53:19,361 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)] === [2024-06-21 19:53:19,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:53:19,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2125317483, now seen corresponding path program 1 times [2024-06-21 19:53:19,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:53:19,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455099275] [2024-06-21 19:53:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:53:19,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:53:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:53:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:53:22,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:53:22,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455099275] [2024-06-21 19:53:22,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455099275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:53:22,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:53:22,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:53:22,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887230449] [2024-06-21 19:53:22,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:53:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:53:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:53:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:53:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:53:22,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:53:22,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 436 transitions, 8861 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) [2024-06-21 19:53:22,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:53:22,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:53:22,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:53:25,167 INFO L124 PetriNetUnfolderBase]: 5195/8404 cut-off events. [2024-06-21 19:53:25,167 INFO L125 PetriNetUnfolderBase]: For 448066/448069 co-relation queries the response was YES. [2024-06-21 19:53:25,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66462 conditions, 8404 events. 5195/8404 cut-off events. For 448066/448069 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 57195 event pairs, 1905 based on Foata normal form. 8/8407 useless extension candidates. Maximal degree in co-relation 66311. Up to 7658 conditions per place. [2024-06-21 19:53:25,267 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 356 selfloop transitions, 134 changer transitions 0/495 dead transitions. [2024-06-21 19:53:25,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 495 transitions, 10561 flow [2024-06-21 19:53:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:53:25,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:53:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-21 19:53:25,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-21 19:53:25,268 INFO L175 Difference]: Start difference. First operand has 302 places, 436 transitions, 8861 flow. Second operand 11 states and 194 transitions. [2024-06-21 19:53:25,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 495 transitions, 10561 flow [2024-06-21 19:53:26,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 495 transitions, 10498 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 19:53:26,669 INFO L231 Difference]: Finished difference. Result has 311 places, 453 transitions, 9400 flow [2024-06-21 19:53:26,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8798, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9400, PETRI_PLACES=311, PETRI_TRANSITIONS=453} [2024-06-21 19:53:26,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 19:53:26,669 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 453 transitions, 9400 flow [2024-06-21 19:53:26,669 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) [2024-06-21 19:53:26,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:53:26,670 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] [2024-06-21 19:53:26,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:53:26,670 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)] === [2024-06-21 19:53:26,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:53:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1934860761, now seen corresponding path program 2 times [2024-06-21 19:53:26,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:53:26,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003105357] [2024-06-21 19:53:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:53:26,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:53:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:53:30,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:53:30,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:53:30,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003105357] [2024-06-21 19:53:30,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003105357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:53:30,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:53:30,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:53:30,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687186026] [2024-06-21 19:53:30,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:53:30,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:53:30,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:53:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:53:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:53:30,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:53:30,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 453 transitions, 9400 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) [2024-06-21 19:53:30,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:53:30,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:53:30,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:53:32,925 INFO L124 PetriNetUnfolderBase]: 5305/8584 cut-off events. [2024-06-21 19:53:32,925 INFO L125 PetriNetUnfolderBase]: For 499198/499198 co-relation queries the response was YES. [2024-06-21 19:53:32,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70402 conditions, 8584 events. 5305/8584 cut-off events. For 499198/499198 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 58560 event pairs, 1694 based on Foata normal form. 4/8585 useless extension candidates. Maximal degree in co-relation 70248. Up to 7833 conditions per place. [2024-06-21 19:53:33,033 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 363 selfloop transitions, 148 changer transitions 0/516 dead transitions. [2024-06-21 19:53:33,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 516 transitions, 11121 flow [2024-06-21 19:53:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:53:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:53:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-21 19:53:33,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-21 19:53:33,035 INFO L175 Difference]: Start difference. First operand has 311 places, 453 transitions, 9400 flow. Second operand 11 states and 194 transitions. [2024-06-21 19:53:33,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 516 transitions, 11121 flow [2024-06-21 19:53:34,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 516 transitions, 10688 flow, removed 146 selfloop flow, removed 5 redundant places. [2024-06-21 19:53:34,539 INFO L231 Difference]: Finished difference. Result has 319 places, 476 transitions, 9718 flow [2024-06-21 19:53:34,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9077, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9718, PETRI_PLACES=319, PETRI_TRANSITIONS=476} [2024-06-21 19:53:34,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 19:53:34,540 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 476 transitions, 9718 flow [2024-06-21 19:53:34,540 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) [2024-06-21 19:53:34,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:53:34,540 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] [2024-06-21 19:53:34,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:53:34,540 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)] === [2024-06-21 19:53:34,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:53:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2129036553, now seen corresponding path program 3 times [2024-06-21 19:53:34,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:53:34,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828176852] [2024-06-21 19:53:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:53:34,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:53:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:53:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:53:37,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:53:37,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828176852] [2024-06-21 19:53:37,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828176852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:53:37,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:53:37,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:53:37,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067848475] [2024-06-21 19:53:37,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:53:37,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:53:37,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:53:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:53:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:53:37,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:53:37,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 476 transitions, 9718 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) [2024-06-21 19:53:37,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:53:37,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:53:37,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:53:40,637 INFO L124 PetriNetUnfolderBase]: 5355/8654 cut-off events. [2024-06-21 19:53:40,638 INFO L125 PetriNetUnfolderBase]: For 519890/519890 co-relation queries the response was YES. [2024-06-21 19:53:40,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71963 conditions, 8654 events. 5355/8654 cut-off events. For 519890/519890 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 58921 event pairs, 1710 based on Foata normal form. 10/8661 useless extension candidates. Maximal degree in co-relation 71807. Up to 7826 conditions per place. [2024-06-21 19:53:40,743 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 349 selfloop transitions, 176 changer transitions 0/530 dead transitions. [2024-06-21 19:53:40,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 530 transitions, 11441 flow [2024-06-21 19:53:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:53:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:53:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 19:53:40,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 19:53:40,745 INFO L175 Difference]: Start difference. First operand has 319 places, 476 transitions, 9718 flow. Second operand 10 states and 185 transitions. [2024-06-21 19:53:40,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 530 transitions, 11441 flow [2024-06-21 19:53:42,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 530 transitions, 11202 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 19:53:42,077 INFO L231 Difference]: Finished difference. Result has 324 places, 488 transitions, 10126 flow [2024-06-21 19:53:42,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9493, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10126, PETRI_PLACES=324, PETRI_TRANSITIONS=488} [2024-06-21 19:53:42,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-21 19:53:42,078 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 488 transitions, 10126 flow [2024-06-21 19:53:42,078 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) [2024-06-21 19:53:42,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:53:42,078 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] [2024-06-21 19:53:42,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:53:42,078 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)] === [2024-06-21 19:53:42,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:53:42,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2021824887, now seen corresponding path program 1 times [2024-06-21 19:53:42,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:53:42,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756353074] [2024-06-21 19:53:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:53:42,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:53:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:53:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:53:46,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:53:46,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756353074] [2024-06-21 19:53:46,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756353074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:53:46,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:53:46,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:53:46,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446154526] [2024-06-21 19:53:46,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:53:46,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:53:46,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:53:46,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:53:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:53:46,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:53:46,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 488 transitions, 10126 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) [2024-06-21 19:53:46,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:53:46,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:53:46,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:53:48,892 INFO L124 PetriNetUnfolderBase]: 5399/8695 cut-off events. [2024-06-21 19:53:48,893 INFO L125 PetriNetUnfolderBase]: For 544438/544438 co-relation queries the response was YES. [2024-06-21 19:53:48,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74103 conditions, 8695 events. 5399/8695 cut-off events. For 544438/544438 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 58966 event pairs, 1893 based on Foata normal form. 12/8704 useless extension candidates. Maximal degree in co-relation 73944. Up to 8172 conditions per place. [2024-06-21 19:53:48,998 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 425 selfloop transitions, 96 changer transitions 0/526 dead transitions. [2024-06-21 19:53:48,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 526 transitions, 11522 flow [2024-06-21 19:53:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:53:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:53:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 19:53:48,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 19:53:48,999 INFO L175 Difference]: Start difference. First operand has 324 places, 488 transitions, 10126 flow. Second operand 10 states and 177 transitions. [2024-06-21 19:53:48,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 526 transitions, 11522 flow [2024-06-21 19:53:50,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 526 transitions, 11274 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 19:53:50,117 INFO L231 Difference]: Finished difference. Result has 328 places, 489 transitions, 10103 flow [2024-06-21 19:53:50,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9878, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10103, PETRI_PLACES=328, PETRI_TRANSITIONS=489} [2024-06-21 19:53:50,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 19:53:50,118 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 489 transitions, 10103 flow [2024-06-21 19:53:50,118 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) [2024-06-21 19:53:50,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:53:50,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:53:50,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:53:50,118 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)] === [2024-06-21 19:53:50,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:53:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash -265033599, now seen corresponding path program 1 times [2024-06-21 19:53:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:53:50,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313401142] [2024-06-21 19:53:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:53:50,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:53:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:53:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:53:54,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:53:54,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313401142] [2024-06-21 19:53:54,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313401142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:53:54,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:53:54,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:53:54,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969563743] [2024-06-21 19:53:54,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:53:54,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:53:54,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:53:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:53:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:53:54,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:53:54,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 489 transitions, 10103 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) [2024-06-21 19:53:54,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:53:54,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:53:54,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:53:56,951 INFO L124 PetriNetUnfolderBase]: 5393/8685 cut-off events. [2024-06-21 19:53:56,951 INFO L125 PetriNetUnfolderBase]: For 536425/536425 co-relation queries the response was YES. [2024-06-21 19:53:57,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73814 conditions, 8685 events. 5393/8685 cut-off events. For 536425/536425 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 59062 event pairs, 2192 based on Foata normal form. 2/8684 useless extension candidates. Maximal degree in co-relation 73654. Up to 8339 conditions per place. [2024-06-21 19:53:57,060 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 50 changer transitions 0/512 dead transitions. [2024-06-21 19:53:57,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 512 transitions, 11233 flow [2024-06-21 19:53:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:53:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:53:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 19:53:57,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 19:53:57,061 INFO L175 Difference]: Start difference. First operand has 328 places, 489 transitions, 10103 flow. Second operand 7 states and 125 transitions. [2024-06-21 19:53:57,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 512 transitions, 11233 flow [2024-06-21 19:53:58,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 512 transitions, 10979 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 19:53:58,440 INFO L231 Difference]: Finished difference. Result has 326 places, 489 transitions, 9977 flow [2024-06-21 19:53:58,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9849, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9977, PETRI_PLACES=326, PETRI_TRANSITIONS=489} [2024-06-21 19:53:58,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 19:53:58,440 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 489 transitions, 9977 flow [2024-06-21 19:53:58,440 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) [2024-06-21 19:53:58,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:53:58,441 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] [2024-06-21 19:53:58,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:53:58,441 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)] === [2024-06-21 19:53:58,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:53:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1117430519, now seen corresponding path program 4 times [2024-06-21 19:53:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:53:58,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143124602] [2024-06-21 19:53:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:53:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:53:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:54:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:54:01,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:54:01,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143124602] [2024-06-21 19:54:01,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143124602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:54:01,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:54:01,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:54:01,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359351775] [2024-06-21 19:54:01,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:54:01,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:54:01,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:54:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:54:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:54:01,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:54:01,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 489 transitions, 9977 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) [2024-06-21 19:54:01,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:54:01,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:54:01,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:54:04,501 INFO L124 PetriNetUnfolderBase]: 5459/8788 cut-off events. [2024-06-21 19:54:04,502 INFO L125 PetriNetUnfolderBase]: For 553963/553963 co-relation queries the response was YES. [2024-06-21 19:54:04,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74493 conditions, 8788 events. 5459/8788 cut-off events. For 553963/553963 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 59708 event pairs, 1907 based on Foata normal form. 6/8785 useless extension candidates. Maximal degree in co-relation 74331. Up to 7957 conditions per place. [2024-06-21 19:54:04,624 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 162 changer transitions 0/546 dead transitions. [2024-06-21 19:54:04,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 546 transitions, 11909 flow [2024-06-21 19:54:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:54:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:54:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 19:54:04,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-21 19:54:04,626 INFO L175 Difference]: Start difference. First operand has 326 places, 489 transitions, 9977 flow. Second operand 11 states and 190 transitions. [2024-06-21 19:54:04,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 546 transitions, 11909 flow [2024-06-21 19:54:06,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 546 transitions, 11835 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 19:54:06,320 INFO L231 Difference]: Finished difference. Result has 335 places, 509 transitions, 10565 flow [2024-06-21 19:54:06,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9903, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10565, PETRI_PLACES=335, PETRI_TRANSITIONS=509} [2024-06-21 19:54:06,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 19:54:06,321 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 509 transitions, 10565 flow [2024-06-21 19:54:06,321 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) [2024-06-21 19:54:06,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:54:06,321 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] [2024-06-21 19:54:06,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:54:06,321 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)] === [2024-06-21 19:54:06,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:54:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash -654583239, now seen corresponding path program 5 times [2024-06-21 19:54:06,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:54:06,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227675071] [2024-06-21 19:54:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:54:06,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:54:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:54:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:54:10,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:54:10,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227675071] [2024-06-21 19:54:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227675071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:54:10,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:54:10,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:54:10,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367541844] [2024-06-21 19:54:10,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:54:10,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:54:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:54:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:54:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:54:10,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:54:10,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 509 transitions, 10565 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) [2024-06-21 19:54:10,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:54:10,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:54:10,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:54:13,166 INFO L124 PetriNetUnfolderBase]: 5489/8846 cut-off events. [2024-06-21 19:54:13,166 INFO L125 PetriNetUnfolderBase]: For 594311/594311 co-relation queries the response was YES. [2024-06-21 19:54:13,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77196 conditions, 8846 events. 5489/8846 cut-off events. For 594311/594311 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 60287 event pairs, 2344 based on Foata normal form. 6/8849 useless extension candidates. Maximal degree in co-relation 77031. Up to 8429 conditions per place. [2024-06-21 19:54:13,267 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 485 selfloop transitions, 48 changer transitions 0/538 dead transitions. [2024-06-21 19:54:13,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 538 transitions, 11924 flow [2024-06-21 19:54:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:54:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:54:13,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 19:54:13,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 19:54:13,268 INFO L175 Difference]: Start difference. First operand has 335 places, 509 transitions, 10565 flow. Second operand 7 states and 125 transitions. [2024-06-21 19:54:13,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 538 transitions, 11924 flow [2024-06-21 19:54:14,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 538 transitions, 11584 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 19:54:14,464 INFO L231 Difference]: Finished difference. Result has 336 places, 515 transitions, 10442 flow [2024-06-21 19:54:14,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10247, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10442, PETRI_PLACES=336, PETRI_TRANSITIONS=515} [2024-06-21 19:54:14,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-21 19:54:14,465 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 515 transitions, 10442 flow [2024-06-21 19:54:14,465 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) [2024-06-21 19:54:14,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:54:14,465 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] [2024-06-21 19:54:14,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:54:14,465 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)] === [2024-06-21 19:54:14,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:54:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash -789926549, now seen corresponding path program 6 times [2024-06-21 19:54:14,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:54:14,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807899474] [2024-06-21 19:54:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:54:14,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:54:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:54:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:54:17,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:54:17,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807899474] [2024-06-21 19:54:17,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807899474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:54:17,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:54:17,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:54:17,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165282248] [2024-06-21 19:54:17,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:54:17,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:54:17,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:54:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:54:17,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:54:17,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:54:17,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 515 transitions, 10442 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) [2024-06-21 19:54:17,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:54:17,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:54:17,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:54:21,228 INFO L124 PetriNetUnfolderBase]: 5540/8911 cut-off events. [2024-06-21 19:54:21,228 INFO L125 PetriNetUnfolderBase]: For 609227/609227 co-relation queries the response was YES. [2024-06-21 19:54:21,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77538 conditions, 8911 events. 5540/8911 cut-off events. For 609227/609227 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 60544 event pairs, 1884 based on Foata normal form. 6/8907 useless extension candidates. Maximal degree in co-relation 77372. Up to 8023 conditions per place. [2024-06-21 19:54:21,342 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 379 selfloop transitions, 208 changer transitions 0/592 dead transitions. [2024-06-21 19:54:21,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 592 transitions, 12687 flow [2024-06-21 19:54:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:54:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:54:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 228 transitions. [2024-06-21 19:54:21,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-21 19:54:21,343 INFO L175 Difference]: Start difference. First operand has 336 places, 515 transitions, 10442 flow. Second operand 14 states and 228 transitions. [2024-06-21 19:54:21,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 592 transitions, 12687 flow [2024-06-21 19:54:23,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 592 transitions, 12542 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 19:54:23,034 INFO L231 Difference]: Finished difference. Result has 349 places, 554 transitions, 11326 flow [2024-06-21 19:54:23,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10320, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11326, PETRI_PLACES=349, PETRI_TRANSITIONS=554} [2024-06-21 19:54:23,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-21 19:54:23,035 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 554 transitions, 11326 flow [2024-06-21 19:54:23,035 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) [2024-06-21 19:54:23,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:54:23,035 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] [2024-06-21 19:54:23,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:54:23,035 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)] === [2024-06-21 19:54:23,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:54:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1968993017, now seen corresponding path program 7 times [2024-06-21 19:54:23,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:54:23,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287296302] [2024-06-21 19:54:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:54:23,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:54:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:54:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:54:27,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:54:27,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287296302] [2024-06-21 19:54:27,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287296302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:54:27,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:54:27,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:54:27,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771712565] [2024-06-21 19:54:27,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:54:27,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:54:27,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:54:27,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:54:27,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:54:27,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:54:27,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 554 transitions, 11326 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) [2024-06-21 19:54:27,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:54:27,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:54:27,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:54:29,704 INFO L124 PetriNetUnfolderBase]: 5542/8914 cut-off events. [2024-06-21 19:54:29,704 INFO L125 PetriNetUnfolderBase]: For 627232/627232 co-relation queries the response was YES. [2024-06-21 19:54:29,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78997 conditions, 8914 events. 5542/8914 cut-off events. For 627232/627232 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 60770 event pairs, 2373 based on Foata normal form. 2/8913 useless extension candidates. Maximal degree in co-relation 78827. Up to 8575 conditions per place. [2024-06-21 19:54:29,822 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 534 selfloop transitions, 42 changer transitions 0/581 dead transitions. [2024-06-21 19:54:29,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 581 transitions, 12794 flow [2024-06-21 19:54:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:54:29,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:54:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 19:54:29,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 19:54:29,823 INFO L175 Difference]: Start difference. First operand has 349 places, 554 transitions, 11326 flow. Second operand 8 states and 129 transitions. [2024-06-21 19:54:29,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 581 transitions, 12794 flow [2024-06-21 19:54:31,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 581 transitions, 12358 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 19:54:31,261 INFO L231 Difference]: Finished difference. Result has 351 places, 565 transitions, 11218 flow [2024-06-21 19:54:31,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10904, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11218, PETRI_PLACES=351, PETRI_TRANSITIONS=565} [2024-06-21 19:54:31,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 19:54:31,262 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 565 transitions, 11218 flow [2024-06-21 19:54:31,262 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) [2024-06-21 19:54:31,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:54:31,262 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] [2024-06-21 19:54:31,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:54:31,262 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)] === [2024-06-21 19:54:31,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:54:31,263 INFO L85 PathProgramCache]: Analyzing trace with hash -477970457, now seen corresponding path program 8 times [2024-06-21 19:54:31,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:54:31,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680679921] [2024-06-21 19:54:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:54:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:54:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:54:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:54:35,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:54:35,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680679921] [2024-06-21 19:54:35,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680679921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:54:35,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:54:35,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:54:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386484320] [2024-06-21 19:54:35,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:54:35,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:54:35,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:54:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:54:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:54:35,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:54:35,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 565 transitions, 11218 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) [2024-06-21 19:54:35,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:54:35,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:54:35,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:54:38,161 INFO L124 PetriNetUnfolderBase]: 5600/9000 cut-off events. [2024-06-21 19:54:38,161 INFO L125 PetriNetUnfolderBase]: For 657119/657119 co-relation queries the response was YES. [2024-06-21 19:54:38,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80083 conditions, 9000 events. 5600/9000 cut-off events. For 657119/657119 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 61420 event pairs, 2372 based on Foata normal form. 2/8999 useless extension candidates. Maximal degree in co-relation 79911. Up to 8575 conditions per place. [2024-06-21 19:54:38,283 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 531 selfloop transitions, 67 changer transitions 0/603 dead transitions. [2024-06-21 19:54:38,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 603 transitions, 13027 flow [2024-06-21 19:54:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:54:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:54:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 19:54:38,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 19:54:38,284 INFO L175 Difference]: Start difference. First operand has 351 places, 565 transitions, 11218 flow. Second operand 9 states and 140 transitions. [2024-06-21 19:54:38,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 603 transitions, 13027 flow [2024-06-21 19:54:40,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 603 transitions, 12887 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 19:54:40,152 INFO L231 Difference]: Finished difference. Result has 357 places, 582 transitions, 11594 flow [2024-06-21 19:54:40,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11078, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11594, PETRI_PLACES=357, PETRI_TRANSITIONS=582} [2024-06-21 19:54:40,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 19:54:40,153 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 582 transitions, 11594 flow [2024-06-21 19:54:40,153 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) [2024-06-21 19:54:40,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:54:40,153 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] [2024-06-21 19:54:40,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:54:40,153 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)] === [2024-06-21 19:54:40,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:54:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash -671021717, now seen corresponding path program 9 times [2024-06-21 19:54:40,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:54:40,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579800831] [2024-06-21 19:54:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:54:40,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:54:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:54:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:54:43,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:54:43,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579800831] [2024-06-21 19:54:43,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579800831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:54:43,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:54:43,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:54:43,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461528601] [2024-06-21 19:54:43,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:54:43,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:54:43,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:54:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:54:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:54:43,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:54:43,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 582 transitions, 11594 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) [2024-06-21 19:54:43,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:54:43,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:54:43,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:54:46,520 INFO L124 PetriNetUnfolderBase]: 5597/9016 cut-off events. [2024-06-21 19:54:46,520 INFO L125 PetriNetUnfolderBase]: For 671999/671999 co-relation queries the response was YES. [2024-06-21 19:54:46,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80796 conditions, 9016 events. 5597/9016 cut-off events. For 671999/671999 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 61520 event pairs, 1679 based on Foata normal form. 1/9008 useless extension candidates. Maximal degree in co-relation 80621. Up to 8045 conditions per place. [2024-06-21 19:54:46,640 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 414 selfloop transitions, 231 changer transitions 0/650 dead transitions. [2024-06-21 19:54:46,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 650 transitions, 14306 flow [2024-06-21 19:54:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:54:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:54:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 19:54:46,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 19:54:46,642 INFO L175 Difference]: Start difference. First operand has 357 places, 582 transitions, 11594 flow. Second operand 9 states and 173 transitions. [2024-06-21 19:54:46,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 650 transitions, 14306 flow [2024-06-21 19:54:48,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 650 transitions, 14152 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 19:54:48,424 INFO L231 Difference]: Finished difference. Result has 361 places, 604 transitions, 12548 flow [2024-06-21 19:54:48,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11440, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12548, PETRI_PLACES=361, PETRI_TRANSITIONS=604} [2024-06-21 19:54:48,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-21 19:54:48,424 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 604 transitions, 12548 flow [2024-06-21 19:54:48,424 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) [2024-06-21 19:54:48,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:54:48,425 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] [2024-06-21 19:54:48,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:54:48,425 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)] === [2024-06-21 19:54:48,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:54:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash -184684389, now seen corresponding path program 10 times [2024-06-21 19:54:48,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:54:48,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740781348] [2024-06-21 19:54:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:54:48,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:54:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:54:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:54:51,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:54:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740781348] [2024-06-21 19:54:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740781348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:54:51,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:54:51,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:54:51,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556165055] [2024-06-21 19:54:51,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:54:51,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:54:51,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:54:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:54:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:54:51,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:54:51,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 604 transitions, 12548 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) [2024-06-21 19:54:51,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:54:51,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:54:51,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:54:54,818 INFO L124 PetriNetUnfolderBase]: 5729/9193 cut-off events. [2024-06-21 19:54:54,818 INFO L125 PetriNetUnfolderBase]: For 730160/730160 co-relation queries the response was YES. [2024-06-21 19:54:54,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84505 conditions, 9193 events. 5729/9193 cut-off events. For 730160/730160 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 62483 event pairs, 1728 based on Foata normal form. 6/9190 useless extension candidates. Maximal degree in co-relation 84328. Up to 8097 conditions per place. [2024-06-21 19:54:54,948 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 257 changer transitions 0/682 dead transitions. [2024-06-21 19:54:54,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 682 transitions, 15376 flow [2024-06-21 19:54:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:54:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:54:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 19:54:54,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-21 19:54:54,949 INFO L175 Difference]: Start difference. First operand has 361 places, 604 transitions, 12548 flow. Second operand 11 states and 200 transitions. [2024-06-21 19:54:54,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 682 transitions, 15376 flow [2024-06-21 19:54:57,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 682 transitions, 15019 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-21 19:54:57,331 INFO L231 Difference]: Finished difference. Result has 367 places, 628 transitions, 13126 flow [2024-06-21 19:54:57,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12244, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13126, PETRI_PLACES=367, PETRI_TRANSITIONS=628} [2024-06-21 19:54:57,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 19:54:57,332 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 628 transitions, 13126 flow [2024-06-21 19:54:57,332 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) [2024-06-21 19:54:57,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:54:57,332 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] [2024-06-21 19:54:57,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:54:57,332 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)] === [2024-06-21 19:54:57,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:54:57,332 INFO L85 PathProgramCache]: Analyzing trace with hash -877467767, now seen corresponding path program 11 times [2024-06-21 19:54:57,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:54:57,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856883614] [2024-06-21 19:54:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:54:57,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:54:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:55:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:55:00,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:55:00,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856883614] [2024-06-21 19:55:00,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856883614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:55:00,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:55:00,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:55:00,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381266324] [2024-06-21 19:55:00,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:55:00,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:55:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:55:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:55:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:55:00,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:55:00,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 628 transitions, 13126 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) [2024-06-21 19:55:00,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:55:00,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:55:00,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:55:04,022 INFO L124 PetriNetUnfolderBase]: 5723/9185 cut-off events. [2024-06-21 19:55:04,023 INFO L125 PetriNetUnfolderBase]: For 734311/734311 co-relation queries the response was YES. [2024-06-21 19:55:04,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84493 conditions, 9185 events. 5723/9185 cut-off events. For 734311/734311 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 62379 event pairs, 1695 based on Foata normal form. 2/9178 useless extension candidates. Maximal degree in co-relation 84316. Up to 8170 conditions per place. [2024-06-21 19:55:04,156 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 429 selfloop transitions, 249 changer transitions 0/683 dead transitions. [2024-06-21 19:55:04,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 683 transitions, 15544 flow [2024-06-21 19:55:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:55:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:55:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-21 19:55:04,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:55:04,157 INFO L175 Difference]: Start difference. First operand has 367 places, 628 transitions, 13126 flow. Second operand 12 states and 212 transitions. [2024-06-21 19:55:04,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 683 transitions, 15544 flow [2024-06-21 19:55:06,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 683 transitions, 15110 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-21 19:55:06,586 INFO L231 Difference]: Finished difference. Result has 373 places, 634 transitions, 13331 flow [2024-06-21 19:55:06,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12738, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13331, PETRI_PLACES=373, PETRI_TRANSITIONS=634} [2024-06-21 19:55:06,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-21 19:55:06,587 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 634 transitions, 13331 flow [2024-06-21 19:55:06,587 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) [2024-06-21 19:55:06,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:55:06,587 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] [2024-06-21 19:55:06,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:55:06,587 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:55:06,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:55:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash 215028247, now seen corresponding path program 2 times [2024-06-21 19:55:06,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:55:06,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214069851] [2024-06-21 19:55:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:55:06,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:55:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:55:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:55:12,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:55:12,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214069851] [2024-06-21 19:55:12,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214069851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:55:12,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:55:12,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:55:12,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242912346] [2024-06-21 19:55:12,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:55:12,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:55:12,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:55:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:55:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:55:12,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:55:12,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 634 transitions, 13331 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) [2024-06-21 19:55:12,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:55:12,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:55:12,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:55:14,787 INFO L124 PetriNetUnfolderBase]: 5731/9183 cut-off events. [2024-06-21 19:55:14,787 INFO L125 PetriNetUnfolderBase]: For 749511/749511 co-relation queries the response was YES. [2024-06-21 19:55:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84496 conditions, 9183 events. 5731/9183 cut-off events. For 749511/749511 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 62557 event pairs, 2269 based on Foata normal form. 2/9182 useless extension candidates. Maximal degree in co-relation 84318. Up to 8877 conditions per place. [2024-06-21 19:55:14,920 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 619 selfloop transitions, 24 changer transitions 0/648 dead transitions. [2024-06-21 19:55:14,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 648 transitions, 14701 flow [2024-06-21 19:55:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:55:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:55:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 19:55:14,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:55:14,921 INFO L175 Difference]: Start difference. First operand has 373 places, 634 transitions, 13331 flow. Second operand 7 states and 112 transitions. [2024-06-21 19:55:14,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 648 transitions, 14701 flow [2024-06-21 19:55:17,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 648 transitions, 14360 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 19:55:17,471 INFO L231 Difference]: Finished difference. Result has 374 places, 636 transitions, 13095 flow [2024-06-21 19:55:17,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12990, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13095, PETRI_PLACES=374, PETRI_TRANSITIONS=636} [2024-06-21 19:55:17,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-21 19:55:17,472 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 636 transitions, 13095 flow [2024-06-21 19:55:17,473 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) [2024-06-21 19:55:17,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:55:17,473 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] [2024-06-21 19:55:17,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:55:17,473 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:55:17,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:55:17,474 INFO L85 PathProgramCache]: Analyzing trace with hash -463677721, now seen corresponding path program 3 times [2024-06-21 19:55:17,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:55:17,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529441323] [2024-06-21 19:55:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:55:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:55:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:55:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:55:22,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:55:22,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529441323] [2024-06-21 19:55:22,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529441323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:55:22,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:55:22,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:55:22,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810496454] [2024-06-21 19:55:22,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:55:22,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:55:22,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:55:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:55:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:55:22,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:55:22,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 636 transitions, 13095 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) [2024-06-21 19:55:22,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:55:22,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:55:22,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:55:25,589 INFO L124 PetriNetUnfolderBase]: 5826/9336 cut-off events. [2024-06-21 19:55:25,589 INFO L125 PetriNetUnfolderBase]: For 810287/810287 co-relation queries the response was YES. [2024-06-21 19:55:25,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85746 conditions, 9336 events. 5826/9336 cut-off events. For 810287/810287 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 63745 event pairs, 2274 based on Foata normal form. 8/9341 useless extension candidates. Maximal degree in co-relation 85569. Up to 8898 conditions per place. [2024-06-21 19:55:25,717 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 624 selfloop transitions, 34 changer transitions 0/663 dead transitions. [2024-06-21 19:55:25,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 663 transitions, 14780 flow [2024-06-21 19:55:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:55:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:55:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:55:25,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 19:55:25,718 INFO L175 Difference]: Start difference. First operand has 374 places, 636 transitions, 13095 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:55:25,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 663 transitions, 14780 flow [2024-06-21 19:55:28,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 663 transitions, 14670 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 19:55:28,260 INFO L231 Difference]: Finished difference. Result has 379 places, 640 transitions, 13150 flow [2024-06-21 19:55:28,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12985, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13150, PETRI_PLACES=379, PETRI_TRANSITIONS=640} [2024-06-21 19:55:28,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 19:55:28,261 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 640 transitions, 13150 flow [2024-06-21 19:55:28,261 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) [2024-06-21 19:55:28,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:55:28,261 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] [2024-06-21 19:55:28,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:55:28,261 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)] === [2024-06-21 19:55:28,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:55:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash -877459831, now seen corresponding path program 4 times [2024-06-21 19:55:28,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:55:28,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236802157] [2024-06-21 19:55:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:55:28,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:55:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:55:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:55:32,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:55:32,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236802157] [2024-06-21 19:55:32,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236802157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:55:32,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:55:32,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:55:32,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008902028] [2024-06-21 19:55:32,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:55:32,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:55:32,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:55:32,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:55:32,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:55:32,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:55:32,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 640 transitions, 13150 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) [2024-06-21 19:55:32,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:55:32,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:55:32,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:55:35,457 INFO L124 PetriNetUnfolderBase]: 5893/9440 cut-off events. [2024-06-21 19:55:35,457 INFO L125 PetriNetUnfolderBase]: For 832452/832452 co-relation queries the response was YES. [2024-06-21 19:55:35,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86528 conditions, 9440 events. 5893/9440 cut-off events. For 832452/832452 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 64214 event pairs, 1806 based on Foata normal form. 12/9443 useless extension candidates. Maximal degree in co-relation 86349. Up to 8862 conditions per place. [2024-06-21 19:55:35,575 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 573 selfloop transitions, 93 changer transitions 0/671 dead transitions. [2024-06-21 19:55:35,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 671 transitions, 14714 flow [2024-06-21 19:55:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:55:35,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:55:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:55:35,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:55:35,577 INFO L175 Difference]: Start difference. First operand has 379 places, 640 transitions, 13150 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:55:35,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 671 transitions, 14714 flow [2024-06-21 19:55:38,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 671 transitions, 14659 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 19:55:38,074 INFO L231 Difference]: Finished difference. Result has 383 places, 643 transitions, 13365 flow [2024-06-21 19:55:38,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13095, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13365, PETRI_PLACES=383, PETRI_TRANSITIONS=643} [2024-06-21 19:55:38,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-21 19:55:38,075 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 643 transitions, 13365 flow [2024-06-21 19:55:38,075 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) [2024-06-21 19:55:38,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:55:38,075 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] [2024-06-21 19:55:38,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:55:38,075 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)] === [2024-06-21 19:55:38,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:55:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash -670741229, now seen corresponding path program 1 times [2024-06-21 19:55:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:55:38,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441861333] [2024-06-21 19:55:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:55:38,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:55:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:55:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:55:42,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:55:42,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441861333] [2024-06-21 19:55:42,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441861333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:55:42,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:55:42,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:55:42,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299712548] [2024-06-21 19:55:42,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:55:42,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:55:42,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:55:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:55:42,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:55:43,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:55:43,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 643 transitions, 13365 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) [2024-06-21 19:55:43,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:55:43,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:55:43,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:55:46,140 INFO L124 PetriNetUnfolderBase]: 5847/9373 cut-off events. [2024-06-21 19:55:46,140 INFO L125 PetriNetUnfolderBase]: For 816415/816415 co-relation queries the response was YES. [2024-06-21 19:55:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85047 conditions, 9373 events. 5847/9373 cut-off events. For 816415/816415 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 64105 event pairs, 2261 based on Foata normal form. 20/9390 useless extension candidates. Maximal degree in co-relation 84866. Up to 8873 conditions per place. [2024-06-21 19:55:46,277 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 621 selfloop transitions, 37 changer transitions 0/663 dead transitions. [2024-06-21 19:55:46,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 663 transitions, 14855 flow [2024-06-21 19:55:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:55:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:55:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 19:55:46,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 19:55:46,278 INFO L175 Difference]: Start difference. First operand has 383 places, 643 transitions, 13365 flow. Second operand 8 states and 127 transitions. [2024-06-21 19:55:46,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 663 transitions, 14855 flow [2024-06-21 19:55:48,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 663 transitions, 14633 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 19:55:48,823 INFO L231 Difference]: Finished difference. Result has 384 places, 643 transitions, 13235 flow [2024-06-21 19:55:48,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13143, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13235, PETRI_PLACES=384, PETRI_TRANSITIONS=643} [2024-06-21 19:55:48,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 19:55:48,823 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 643 transitions, 13235 flow [2024-06-21 19:55:48,823 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) [2024-06-21 19:55:48,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:55:48,823 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] [2024-06-21 19:55:48,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:55:48,824 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)] === [2024-06-21 19:55:48,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:55:48,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1169868391, now seen corresponding path program 1 times [2024-06-21 19:55:48,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:55:48,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465532709] [2024-06-21 19:55:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:55:48,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:55:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:55:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:55:52,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:55:52,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465532709] [2024-06-21 19:55:52,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465532709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:55:52,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:55:52,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:55:52,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050940931] [2024-06-21 19:55:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:55:52,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:55:52,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:55:52,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:55:52,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:55:52,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:55:52,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 643 transitions, 13235 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) [2024-06-21 19:55:52,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:55:52,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:55:52,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:55:55,495 INFO L124 PetriNetUnfolderBase]: 5829/9342 cut-off events. [2024-06-21 19:55:55,496 INFO L125 PetriNetUnfolderBase]: For 765282/765282 co-relation queries the response was YES. [2024-06-21 19:55:55,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84154 conditions, 9342 events. 5829/9342 cut-off events. For 765282/765282 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 63486 event pairs, 1590 based on Foata normal form. 6/9336 useless extension candidates. Maximal degree in co-relation 83972. Up to 8826 conditions per place. [2024-06-21 19:55:55,615 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 576 selfloop transitions, 92 changer transitions 0/673 dead transitions. [2024-06-21 19:55:55,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 673 transitions, 14802 flow [2024-06-21 19:55:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:55:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:55:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:55:55,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 19:55:55,617 INFO L175 Difference]: Start difference. First operand has 384 places, 643 transitions, 13235 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:55:55,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 673 transitions, 14802 flow [2024-06-21 19:55:58,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 673 transitions, 14665 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:55:58,094 INFO L231 Difference]: Finished difference. Result has 386 places, 643 transitions, 13301 flow [2024-06-21 19:55:58,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13098, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13301, PETRI_PLACES=386, PETRI_TRANSITIONS=643} [2024-06-21 19:55:58,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 19:55:58,095 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 643 transitions, 13301 flow [2024-06-21 19:55:58,095 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) [2024-06-21 19:55:58,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:55:58,095 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] [2024-06-21 19:55:58,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:55:58,095 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)] === [2024-06-21 19:55:58,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:55:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1457471879, now seen corresponding path program 1 times [2024-06-21 19:55:58,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:55:58,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183507811] [2024-06-21 19:55:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:55:58,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:55:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:56:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:56:01,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:56:01,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183507811] [2024-06-21 19:56:01,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183507811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:56:01,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:56:01,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:56:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745824711] [2024-06-21 19:56:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:56:01,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:56:01,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:56:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:56:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:56:01,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:56:01,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 643 transitions, 13301 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) [2024-06-21 19:56:01,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:56:01,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:56:01,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:56:05,134 INFO L124 PetriNetUnfolderBase]: 5845/9369 cut-off events. [2024-06-21 19:56:05,134 INFO L125 PetriNetUnfolderBase]: For 778705/778711 co-relation queries the response was YES. [2024-06-21 19:56:05,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84411 conditions, 9369 events. 5845/9369 cut-off events. For 778705/778711 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 63927 event pairs, 1822 based on Foata normal form. 6/9366 useless extension candidates. Maximal degree in co-relation 84229. Up to 8717 conditions per place. [2024-06-21 19:56:05,264 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 566 selfloop transitions, 111 changer transitions 0/682 dead transitions. [2024-06-21 19:56:05,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 682 transitions, 15191 flow [2024-06-21 19:56:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:56:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:56:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 19:56:05,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 19:56:05,266 INFO L175 Difference]: Start difference. First operand has 386 places, 643 transitions, 13301 flow. Second operand 9 states and 154 transitions. [2024-06-21 19:56:05,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 682 transitions, 15191 flow [2024-06-21 19:56:08,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 682 transitions, 14899 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 19:56:08,122 INFO L231 Difference]: Finished difference. Result has 386 places, 649 transitions, 13383 flow [2024-06-21 19:56:08,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13009, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13383, PETRI_PLACES=386, PETRI_TRANSITIONS=649} [2024-06-21 19:56:08,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 19:56:08,122 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 649 transitions, 13383 flow [2024-06-21 19:56:08,122 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) [2024-06-21 19:56:08,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:56:08,123 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] [2024-06-21 19:56:08,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:56:08,123 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)] === [2024-06-21 19:56:08,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:56:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1457532329, now seen corresponding path program 2 times [2024-06-21 19:56:08,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:56:08,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589707371] [2024-06-21 19:56:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:56:08,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:56:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:56:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:56:12,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:56:12,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589707371] [2024-06-21 19:56:12,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589707371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:56:12,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:56:12,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:56:12,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628862850] [2024-06-21 19:56:12,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:56:12,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:56:12,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:56:12,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:56:12,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:56:12,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:56:12,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 649 transitions, 13383 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:56:12,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:56:12,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:56:12,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:56:15,456 INFO L124 PetriNetUnfolderBase]: 5848/9386 cut-off events. [2024-06-21 19:56:15,456 INFO L125 PetriNetUnfolderBase]: For 783860/783866 co-relation queries the response was YES. [2024-06-21 19:56:15,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84171 conditions, 9386 events. 5848/9386 cut-off events. For 783860/783866 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64071 event pairs, 1837 based on Foata normal form. 6/9383 useless extension candidates. Maximal degree in co-relation 83991. Up to 8804 conditions per place. [2024-06-21 19:56:15,573 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 568 selfloop transitions, 105 changer transitions 0/678 dead transitions. [2024-06-21 19:56:15,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 678 transitions, 14991 flow [2024-06-21 19:56:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:56:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:56:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:56:15,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 19:56:15,575 INFO L175 Difference]: Start difference. First operand has 386 places, 649 transitions, 13383 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:56:15,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 678 transitions, 14991 flow [2024-06-21 19:56:17,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 678 transitions, 14762 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 19:56:17,742 INFO L231 Difference]: Finished difference. Result has 390 places, 651 transitions, 13425 flow [2024-06-21 19:56:17,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13160, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13425, PETRI_PLACES=390, PETRI_TRANSITIONS=651} [2024-06-21 19:56:17,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-21 19:56:17,743 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 651 transitions, 13425 flow [2024-06-21 19:56:17,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:56:17,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:56:17,743 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] [2024-06-21 19:56:17,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:56:17,743 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)] === [2024-06-21 19:56:17,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:56:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1741259143, now seen corresponding path program 3 times [2024-06-21 19:56:17,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:56:17,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541439817] [2024-06-21 19:56:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:56:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:56:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:56:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:56:22,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:56:22,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541439817] [2024-06-21 19:56:22,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541439817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:56:22,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:56:22,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:56:22,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128314543] [2024-06-21 19:56:22,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:56:22,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:56:22,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:56:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:56:22,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:56:22,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:56:22,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 651 transitions, 13425 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) [2024-06-21 19:56:22,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:56:22,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:56:22,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:56:25,298 INFO L124 PetriNetUnfolderBase]: 5831/9332 cut-off events. [2024-06-21 19:56:25,299 INFO L125 PetriNetUnfolderBase]: For 784187/784187 co-relation queries the response was YES. [2024-06-21 19:56:25,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83903 conditions, 9332 events. 5831/9332 cut-off events. For 784187/784187 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 63157 event pairs, 1510 based on Foata normal form. 4/9324 useless extension candidates. Maximal degree in co-relation 83721. Up to 8190 conditions per place. [2024-06-21 19:56:25,428 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 105 changer transitions 0/690 dead transitions. [2024-06-21 19:56:25,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 690 transitions, 15086 flow [2024-06-21 19:56:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:56:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:56:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:56:25,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 19:56:25,429 INFO L175 Difference]: Start difference. First operand has 390 places, 651 transitions, 13425 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:56:25,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 690 transitions, 15086 flow [2024-06-21 19:56:28,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 690 transitions, 14785 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 19:56:28,052 INFO L231 Difference]: Finished difference. Result has 390 places, 651 transitions, 13370 flow [2024-06-21 19:56:28,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13124, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13370, PETRI_PLACES=390, PETRI_TRANSITIONS=651} [2024-06-21 19:56:28,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-21 19:56:28,052 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 651 transitions, 13370 flow [2024-06-21 19:56:28,053 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) [2024-06-21 19:56:28,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:56:28,053 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] [2024-06-21 19:56:28,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:56:28,053 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)] === [2024-06-21 19:56:28,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:56:28,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1747693193, now seen corresponding path program 1 times [2024-06-21 19:56:28,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:56:28,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046186643] [2024-06-21 19:56:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:56:28,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:56:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:56:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:56:32,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:56:32,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046186643] [2024-06-21 19:56:32,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046186643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:56:32,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:56:32,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:56:32,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641614684] [2024-06-21 19:56:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:56:32,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:56:32,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:56:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:56:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:56:32,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:56:32,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 651 transitions, 13370 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) [2024-06-21 19:56:32,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:56:32,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:56:32,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:56:35,396 INFO L124 PetriNetUnfolderBase]: 5792/9327 cut-off events. [2024-06-21 19:56:35,396 INFO L125 PetriNetUnfolderBase]: For 784037/784037 co-relation queries the response was YES. [2024-06-21 19:56:35,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82871 conditions, 9327 events. 5792/9327 cut-off events. For 784037/784037 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 63983 event pairs, 1670 based on Foata normal form. 13/9337 useless extension candidates. Maximal degree in co-relation 82689. Up to 8443 conditions per place. [2024-06-21 19:56:35,527 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 489 selfloop transitions, 206 changer transitions 0/700 dead transitions. [2024-06-21 19:56:35,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 700 transitions, 15361 flow [2024-06-21 19:56:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:56:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:56:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-21 19:56:35,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:56:35,736 INFO L175 Difference]: Start difference. First operand has 390 places, 651 transitions, 13370 flow. Second operand 12 states and 212 transitions. [2024-06-21 19:56:35,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 700 transitions, 15361 flow [2024-06-21 19:56:38,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 700 transitions, 15119 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 19:56:38,199 INFO L231 Difference]: Finished difference. Result has 395 places, 651 transitions, 13570 flow [2024-06-21 19:56:38,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13128, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13570, PETRI_PLACES=395, PETRI_TRANSITIONS=651} [2024-06-21 19:56:38,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 19:56:38,200 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 651 transitions, 13570 flow [2024-06-21 19:56:38,200 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) [2024-06-21 19:56:38,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:56:38,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:56:38,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:56:38,201 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)] === [2024-06-21 19:56:38,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:56:38,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1112999545, now seen corresponding path program 4 times [2024-06-21 19:56:38,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:56:38,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726586930] [2024-06-21 19:56:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:56:38,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:56:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:56:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:56:42,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:56:42,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726586930] [2024-06-21 19:56:42,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726586930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:56:42,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:56:42,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:56:42,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567903861] [2024-06-21 19:56:42,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:56:42,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:56:42,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:56:42,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:56:42,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:56:42,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:56:42,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 651 transitions, 13570 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) [2024-06-21 19:56:42,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:56:42,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:56:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:56:45,532 INFO L124 PetriNetUnfolderBase]: 5800/9306 cut-off events. [2024-06-21 19:56:45,532 INFO L125 PetriNetUnfolderBase]: For 765467/765467 co-relation queries the response was YES. [2024-06-21 19:56:45,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83305 conditions, 9306 events. 5800/9306 cut-off events. For 765467/765467 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 63527 event pairs, 1788 based on Foata normal form. 2/9299 useless extension candidates. Maximal degree in co-relation 83123. Up to 8702 conditions per place. [2024-06-21 19:56:45,650 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 575 selfloop transitions, 103 changer transitions 0/683 dead transitions. [2024-06-21 19:56:45,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 683 transitions, 15315 flow [2024-06-21 19:56:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:56:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:56:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 19:56:45,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 19:56:45,652 INFO L175 Difference]: Start difference. First operand has 395 places, 651 transitions, 13570 flow. Second operand 9 states and 150 transitions. [2024-06-21 19:56:45,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 683 transitions, 15315 flow [2024-06-21 19:56:48,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 683 transitions, 14893 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 19:56:48,558 INFO L231 Difference]: Finished difference. Result has 394 places, 653 transitions, 13393 flow [2024-06-21 19:56:48,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13148, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13393, PETRI_PLACES=394, PETRI_TRANSITIONS=653} [2024-06-21 19:56:48,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 19:56:48,559 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 653 transitions, 13393 flow [2024-06-21 19:56:48,559 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) [2024-06-21 19:56:48,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:56:48,559 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] [2024-06-21 19:56:48,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:56:48,559 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)] === [2024-06-21 19:56:48,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:56:48,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1222469601, now seen corresponding path program 5 times [2024-06-21 19:56:48,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:56:48,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768100182] [2024-06-21 19:56:48,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:56:48,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:56:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:56:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:56:52,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:56:52,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768100182] [2024-06-21 19:56:52,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768100182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:56:52,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:56:52,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:56:52,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780069686] [2024-06-21 19:56:52,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:56:52,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:56:52,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:56:52,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:56:52,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:56:52,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:56:52,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 653 transitions, 13393 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) [2024-06-21 19:56:52,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:56:52,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:56:52,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:56:55,887 INFO L124 PetriNetUnfolderBase]: 5808/9319 cut-off events. [2024-06-21 19:56:55,887 INFO L125 PetriNetUnfolderBase]: For 774945/774945 co-relation queries the response was YES. [2024-06-21 19:56:55,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83214 conditions, 9319 events. 5808/9319 cut-off events. For 774945/774945 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 63611 event pairs, 1799 based on Foata normal form. 2/9312 useless extension candidates. Maximal degree in co-relation 83030. Up to 8755 conditions per place. [2024-06-21 19:56:56,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 572 selfloop transitions, 103 changer transitions 0/680 dead transitions. [2024-06-21 19:56:56,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 680 transitions, 14980 flow [2024-06-21 19:56:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:56:56,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:56:56,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 19:56:56,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 19:56:56,020 INFO L175 Difference]: Start difference. First operand has 394 places, 653 transitions, 13393 flow. Second operand 9 states and 145 transitions. [2024-06-21 19:56:56,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 680 transitions, 14980 flow [2024-06-21 19:56:58,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 680 transitions, 14799 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:56:58,957 INFO L231 Difference]: Finished difference. Result has 397 places, 655 transitions, 13466 flow [2024-06-21 19:56:58,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13220, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13466, PETRI_PLACES=397, PETRI_TRANSITIONS=655} [2024-06-21 19:56:58,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 19:56:58,957 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 655 transitions, 13466 flow [2024-06-21 19:56:58,958 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) [2024-06-21 19:56:58,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:56:58,958 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] [2024-06-21 19:56:58,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:56:58,958 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)] === [2024-06-21 19:56:58,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:56:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1466318457, now seen corresponding path program 6 times [2024-06-21 19:56:58,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:56:58,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395940011] [2024-06-21 19:56:58,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:56:58,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:56:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:57:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:57:02,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:57:02,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395940011] [2024-06-21 19:57:02,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395940011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:57:02,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:57:02,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:57:02,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400789131] [2024-06-21 19:57:02,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:57:02,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:57:02,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:57:02,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:57:02,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:57:02,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:57:02,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 655 transitions, 13466 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:57:02,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:57:02,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:57:02,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:57:05,845 INFO L124 PetriNetUnfolderBase]: 5816/9340 cut-off events. [2024-06-21 19:57:05,845 INFO L125 PetriNetUnfolderBase]: For 789075/789075 co-relation queries the response was YES. [2024-06-21 19:57:05,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83380 conditions, 9340 events. 5816/9340 cut-off events. For 789075/789075 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 63539 event pairs, 1638 based on Foata normal form. 2/9333 useless extension candidates. Maximal degree in co-relation 83195. Up to 8490 conditions per place. [2024-06-21 19:57:05,977 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 552 selfloop transitions, 132 changer transitions 0/689 dead transitions. [2024-06-21 19:57:05,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 689 transitions, 15388 flow [2024-06-21 19:57:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:57:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:57:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 19:57:05,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 19:57:05,978 INFO L175 Difference]: Start difference. First operand has 397 places, 655 transitions, 13466 flow. Second operand 9 states and 151 transitions. [2024-06-21 19:57:05,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 689 transitions, 15388 flow [2024-06-21 19:57:09,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 689 transitions, 15170 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 19:57:09,209 INFO L231 Difference]: Finished difference. Result has 400 places, 658 transitions, 13631 flow [2024-06-21 19:57:09,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13248, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13631, PETRI_PLACES=400, PETRI_TRANSITIONS=658} [2024-06-21 19:57:09,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-21 19:57:09,210 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 658 transitions, 13631 flow [2024-06-21 19:57:09,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:57:09,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:57:09,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:57:09,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:57:09,210 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)] === [2024-06-21 19:57:09,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:57:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1454890617, now seen corresponding path program 7 times [2024-06-21 19:57:09,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:57:09,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868089020] [2024-06-21 19:57:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:57:09,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:57:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:57:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:57:13,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:57:13,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868089020] [2024-06-21 19:57:13,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868089020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:57:13,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:57:13,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:57:13,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47148397] [2024-06-21 19:57:13,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:57:13,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:57:13,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:57:13,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:57:13,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:57:13,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:57:13,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 658 transitions, 13631 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) [2024-06-21 19:57:13,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:57:13,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:57:13,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:57:16,815 INFO L124 PetriNetUnfolderBase]: 5837/9369 cut-off events. [2024-06-21 19:57:16,815 INFO L125 PetriNetUnfolderBase]: For 812329/812329 co-relation queries the response was YES. [2024-06-21 19:57:16,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84392 conditions, 9369 events. 5837/9369 cut-off events. For 812329/812329 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 63730 event pairs, 1654 based on Foata normal form. 2/9362 useless extension candidates. Maximal degree in co-relation 84205. Up to 8510 conditions per place. [2024-06-21 19:57:16,949 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 546 selfloop transitions, 139 changer transitions 0/690 dead transitions. [2024-06-21 19:57:16,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 690 transitions, 15603 flow [2024-06-21 19:57:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:57:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:57:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 19:57:16,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 19:57:16,951 INFO L175 Difference]: Start difference. First operand has 400 places, 658 transitions, 13631 flow. Second operand 9 states and 147 transitions. [2024-06-21 19:57:16,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 690 transitions, 15603 flow [2024-06-21 19:57:20,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 690 transitions, 15216 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 19:57:20,326 INFO L231 Difference]: Finished difference. Result has 402 places, 663 transitions, 13646 flow [2024-06-21 19:57:20,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13269, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13646, PETRI_PLACES=402, PETRI_TRANSITIONS=663} [2024-06-21 19:57:20,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 19:57:20,326 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 663 transitions, 13646 flow [2024-06-21 19:57:20,327 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) [2024-06-21 19:57:20,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:57:20,327 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] [2024-06-21 19:57:20,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:57:20,327 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)] === [2024-06-21 19:57:20,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:57:20,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1067317057, now seen corresponding path program 8 times [2024-06-21 19:57:20,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:57:20,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913825880] [2024-06-21 19:57:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:57:20,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:57:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:57:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:57:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:57:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913825880] [2024-06-21 19:57:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913825880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:57:24,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:57:24,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:57:24,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936439337] [2024-06-21 19:57:24,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:57:24,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:57:24,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:57:24,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:57:24,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:57:24,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:57:24,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 663 transitions, 13646 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) [2024-06-21 19:57:24,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:57:24,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:57:24,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:57:28,007 INFO L124 PetriNetUnfolderBase]: 5845/9381 cut-off events. [2024-06-21 19:57:28,007 INFO L125 PetriNetUnfolderBase]: For 823439/823439 co-relation queries the response was YES. [2024-06-21 19:57:28,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84216 conditions, 9381 events. 5845/9381 cut-off events. For 823439/823439 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 64089 event pairs, 1818 based on Foata normal form. 2/9374 useless extension candidates. Maximal degree in co-relation 84028. Up to 8812 conditions per place. [2024-06-21 19:57:28,129 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 571 selfloop transitions, 109 changer transitions 0/685 dead transitions. [2024-06-21 19:57:28,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 685 transitions, 15190 flow [2024-06-21 19:57:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:57:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:57:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 19:57:28,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 19:57:28,130 INFO L175 Difference]: Start difference. First operand has 402 places, 663 transitions, 13646 flow. Second operand 9 states and 141 transitions. [2024-06-21 19:57:28,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 685 transitions, 15190 flow [2024-06-21 19:57:31,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 685 transitions, 14963 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 19:57:31,266 INFO L231 Difference]: Finished difference. Result has 406 places, 665 transitions, 13687 flow [2024-06-21 19:57:31,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13421, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13687, PETRI_PLACES=406, PETRI_TRANSITIONS=665} [2024-06-21 19:57:31,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 19:57:31,266 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 665 transitions, 13687 flow [2024-06-21 19:57:31,267 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) [2024-06-21 19:57:31,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:57:31,267 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] [2024-06-21 19:57:31,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:57:31,267 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)] === [2024-06-21 19:57:31,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:57:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1396798167, now seen corresponding path program 9 times [2024-06-21 19:57:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:57:31,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388245589] [2024-06-21 19:57:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:57:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:57:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:57:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:57:35,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:57:35,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388245589] [2024-06-21 19:57:35,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388245589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:57:35,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:57:35,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:57:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755390520] [2024-06-21 19:57:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:57:35,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:57:35,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:57:35,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:57:35,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:57:35,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:57:35,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 665 transitions, 13687 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) [2024-06-21 19:57:35,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:57:35,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:57:35,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:57:38,788 INFO L124 PetriNetUnfolderBase]: 5853/9403 cut-off events. [2024-06-21 19:57:38,788 INFO L125 PetriNetUnfolderBase]: For 837106/837106 co-relation queries the response was YES. [2024-06-21 19:57:38,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84305 conditions, 9403 events. 5853/9403 cut-off events. For 837106/837106 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 64349 event pairs, 1800 based on Foata normal form. 2/9396 useless extension candidates. Maximal degree in co-relation 84116. Up to 8779 conditions per place. [2024-06-21 19:57:38,921 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 563 selfloop transitions, 120 changer transitions 0/688 dead transitions. [2024-06-21 19:57:38,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 688 transitions, 15373 flow [2024-06-21 19:57:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:57:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:57:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 19:57:38,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 19:57:38,922 INFO L175 Difference]: Start difference. First operand has 406 places, 665 transitions, 13687 flow. Second operand 9 states and 142 transitions. [2024-06-21 19:57:38,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 688 transitions, 15373 flow [2024-06-21 19:57:42,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 688 transitions, 15204 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:57:42,526 INFO L231 Difference]: Finished difference. Result has 409 places, 667 transitions, 13796 flow [2024-06-21 19:57:42,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13518, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13796, PETRI_PLACES=409, PETRI_TRANSITIONS=667} [2024-06-21 19:57:42,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-21 19:57:42,526 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 667 transitions, 13796 flow [2024-06-21 19:57:42,526 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) [2024-06-21 19:57:42,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:57:42,527 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] [2024-06-21 19:57:42,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:57:42,527 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)] === [2024-06-21 19:57:42,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:57:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash 13874859, now seen corresponding path program 2 times [2024-06-21 19:57:42,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:57:42,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472206250] [2024-06-21 19:57:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:57:42,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:57:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:57:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:57:46,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:57:46,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472206250] [2024-06-21 19:57:46,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472206250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:57:46,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:57:46,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:57:46,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268445357] [2024-06-21 19:57:46,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:57:46,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:57:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:57:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:57:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:57:46,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:57:46,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 667 transitions, 13796 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) [2024-06-21 19:57:46,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:57:46,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:57:46,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:57:49,838 INFO L124 PetriNetUnfolderBase]: 5864/9447 cut-off events. [2024-06-21 19:57:49,839 INFO L125 PetriNetUnfolderBase]: For 860394/860394 co-relation queries the response was YES. [2024-06-21 19:57:49,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84427 conditions, 9447 events. 5864/9447 cut-off events. For 860394/860394 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 64860 event pairs, 1671 based on Foata normal form. 7/9445 useless extension candidates. Maximal degree in co-relation 84237. Up to 8339 conditions per place. [2024-06-21 19:57:49,976 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 262 changer transitions 0/723 dead transitions. [2024-06-21 19:57:49,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 723 transitions, 16241 flow [2024-06-21 19:57:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:57:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:57:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 213 transitions. [2024-06-21 19:57:49,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 19:57:49,978 INFO L175 Difference]: Start difference. First operand has 409 places, 667 transitions, 13796 flow. Second operand 12 states and 213 transitions. [2024-06-21 19:57:49,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 723 transitions, 16241 flow [2024-06-21 19:57:53,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 723 transitions, 15936 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 19:57:53,249 INFO L231 Difference]: Finished difference. Result has 414 places, 670 transitions, 14075 flow [2024-06-21 19:57:53,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13491, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14075, PETRI_PLACES=414, PETRI_TRANSITIONS=670} [2024-06-21 19:57:53,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-21 19:57:53,250 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 670 transitions, 14075 flow [2024-06-21 19:57:53,250 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) [2024-06-21 19:57:53,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:57:53,250 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] [2024-06-21 19:57:53,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:57:53,250 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)] === [2024-06-21 19:57:53,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:57:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash 383444629, now seen corresponding path program 10 times [2024-06-21 19:57:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:57:53,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802470756] [2024-06-21 19:57:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:57:53,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:57:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:57:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:57:57,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:57:57,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802470756] [2024-06-21 19:57:57,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802470756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:57:57,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:57:57,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:57:57,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200173365] [2024-06-21 19:57:57,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:57:57,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:57:57,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:57:57,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:57:57,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:57:57,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:57:57,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 670 transitions, 14075 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) [2024-06-21 19:57:57,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:57:57,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:57:57,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:58:00,849 INFO L124 PetriNetUnfolderBase]: 5888/9467 cut-off events. [2024-06-21 19:58:00,849 INFO L125 PetriNetUnfolderBase]: For 851132/851132 co-relation queries the response was YES. [2024-06-21 19:58:00,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85224 conditions, 9467 events. 5888/9467 cut-off events. For 851132/851132 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 64827 event pairs, 1610 based on Foata normal form. 2/9457 useless extension candidates. Maximal degree in co-relation 85033. Up to 8797 conditions per place. [2024-06-21 19:58:00,975 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 560 selfloop transitions, 137 changer transitions 0/702 dead transitions. [2024-06-21 19:58:00,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 702 transitions, 15723 flow [2024-06-21 19:58:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:58:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:58:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-21 19:58:00,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-21 19:58:00,976 INFO L175 Difference]: Start difference. First operand has 414 places, 670 transitions, 14075 flow. Second operand 11 states and 181 transitions. [2024-06-21 19:58:00,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 702 transitions, 15723 flow [2024-06-21 19:58:04,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 702 transitions, 15239 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 19:58:04,775 INFO L231 Difference]: Finished difference. Result has 417 places, 671 transitions, 13902 flow [2024-06-21 19:58:04,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13591, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13902, PETRI_PLACES=417, PETRI_TRANSITIONS=671} [2024-06-21 19:58:04,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 19:58:04,775 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 671 transitions, 13902 flow [2024-06-21 19:58:04,775 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) [2024-06-21 19:58:04,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:58:04,775 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] [2024-06-21 19:58:04,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:58:04,776 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)] === [2024-06-21 19:58:04,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:58:04,776 INFO L85 PathProgramCache]: Analyzing trace with hash 16587017, now seen corresponding path program 1 times [2024-06-21 19:58:04,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:58:04,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236376896] [2024-06-21 19:58:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:58:04,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:58:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:58:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:58:09,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:58:09,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236376896] [2024-06-21 19:58:09,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236376896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:58:09,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:58:09,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:58:09,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570039054] [2024-06-21 19:58:09,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:58:09,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:58:09,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:58:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:58:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:58:09,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:58:09,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 671 transitions, 13902 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) [2024-06-21 19:58:09,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:58:09,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:58:09,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:58:13,046 INFO L124 PetriNetUnfolderBase]: 5879/9442 cut-off events. [2024-06-21 19:58:13,046 INFO L125 PetriNetUnfolderBase]: For 857737/857737 co-relation queries the response was YES. [2024-06-21 19:58:13,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84605 conditions, 9442 events. 5879/9442 cut-off events. For 857737/857737 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 64928 event pairs, 2275 based on Foata normal form. 3/9442 useless extension candidates. Maximal degree in co-relation 84413. Up to 8997 conditions per place. [2024-06-21 19:58:13,184 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 618 selfloop transitions, 70 changer transitions 0/693 dead transitions. [2024-06-21 19:58:13,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 693 transitions, 15655 flow [2024-06-21 19:58:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:58:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:58:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-21 19:58:13,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 19:58:13,185 INFO L175 Difference]: Start difference. First operand has 417 places, 671 transitions, 13902 flow. Second operand 10 states and 155 transitions. [2024-06-21 19:58:13,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 693 transitions, 15655 flow [2024-06-21 19:58:17,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 693 transitions, 15310 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-21 19:58:17,134 INFO L231 Difference]: Finished difference. Result has 418 places, 671 transitions, 13745 flow [2024-06-21 19:58:17,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13581, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13745, PETRI_PLACES=418, PETRI_TRANSITIONS=671} [2024-06-21 19:58:17,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 19:58:17,135 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 671 transitions, 13745 flow [2024-06-21 19:58:17,135 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) [2024-06-21 19:58:17,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:58:17,135 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] [2024-06-21 19:58:17,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:58:17,135 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)] === [2024-06-21 19:58:17,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:58:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1725527573, now seen corresponding path program 3 times [2024-06-21 19:58:17,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:58:17,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374048284] [2024-06-21 19:58:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:58:17,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:58:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:58:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:58:21,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:58:21,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374048284] [2024-06-21 19:58:21,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374048284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:58:21,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:58:21,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:58:21,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790646816] [2024-06-21 19:58:21,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:58:21,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:58:21,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:58:21,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:58:21,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:58:21,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:58:21,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 671 transitions, 13745 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) [2024-06-21 19:58:21,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:58:21,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:58:21,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:58:25,173 INFO L124 PetriNetUnfolderBase]: 5864/9418 cut-off events. [2024-06-21 19:58:25,173 INFO L125 PetriNetUnfolderBase]: For 852345/852345 co-relation queries the response was YES. [2024-06-21 19:58:25,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83726 conditions, 9418 events. 5864/9418 cut-off events. For 852345/852345 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 64714 event pairs, 2275 based on Foata normal form. 5/9420 useless extension candidates. Maximal degree in co-relation 83533. Up to 8985 conditions per place. [2024-06-21 19:58:25,293 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 620 selfloop transitions, 67 changer transitions 0/692 dead transitions. [2024-06-21 19:58:25,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 692 transitions, 15286 flow [2024-06-21 19:58:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:58:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:58:25,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 19:58:25,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-21 19:58:25,294 INFO L175 Difference]: Start difference. First operand has 418 places, 671 transitions, 13745 flow. Second operand 10 states and 153 transitions. [2024-06-21 19:58:25,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 692 transitions, 15286 flow [2024-06-21 19:58:28,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 692 transitions, 15080 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 19:58:28,496 INFO L231 Difference]: Finished difference. Result has 420 places, 671 transitions, 13698 flow [2024-06-21 19:58:28,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13539, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13698, PETRI_PLACES=420, PETRI_TRANSITIONS=671} [2024-06-21 19:58:28,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-21 19:58:28,496 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 671 transitions, 13698 flow [2024-06-21 19:58:28,497 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) [2024-06-21 19:58:28,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:58:28,497 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] [2024-06-21 19:58:28,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:58:28,497 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)] === [2024-06-21 19:58:28,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:58:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash 153784881, now seen corresponding path program 2 times [2024-06-21 19:58:28,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:58:28,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507770700] [2024-06-21 19:58:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:58:28,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:58:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:58:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:58:32,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:58:32,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507770700] [2024-06-21 19:58:32,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507770700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:58:32,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:58:32,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:58:32,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554769019] [2024-06-21 19:58:32,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:58:32,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:58:32,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:58:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:58:32,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:58:32,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:58:32,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 671 transitions, 13698 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) [2024-06-21 19:58:32,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:58:32,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:58:32,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:58:35,581 INFO L124 PetriNetUnfolderBase]: 5849/9420 cut-off events. [2024-06-21 19:58:35,582 INFO L125 PetriNetUnfolderBase]: For 842940/842940 co-relation queries the response was YES. [2024-06-21 19:58:35,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83213 conditions, 9420 events. 5849/9420 cut-off events. For 842940/842940 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 64700 event pairs, 1713 based on Foata normal form. 5/9416 useless extension candidates. Maximal degree in co-relation 83019. Up to 8344 conditions per place. [2024-06-21 19:58:35,717 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 262 changer transitions 0/707 dead transitions. [2024-06-21 19:58:35,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 707 transitions, 15597 flow [2024-06-21 19:58:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:58:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:58:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 19:58:35,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:58:35,718 INFO L175 Difference]: Start difference. First operand has 420 places, 671 transitions, 13698 flow. Second operand 10 states and 175 transitions. [2024-06-21 19:58:35,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 707 transitions, 15597 flow [2024-06-21 19:58:40,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 707 transitions, 15365 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-21 19:58:40,076 INFO L231 Difference]: Finished difference. Result has 421 places, 671 transitions, 14033 flow [2024-06-21 19:58:40,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13496, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14033, PETRI_PLACES=421, PETRI_TRANSITIONS=671} [2024-06-21 19:58:40,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-21 19:58:40,077 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 671 transitions, 14033 flow [2024-06-21 19:58:40,077 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) [2024-06-21 19:58:40,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:58:40,077 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] [2024-06-21 19:58:40,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:58:40,077 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)] === [2024-06-21 19:58:40,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:58:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash -177530147, now seen corresponding path program 11 times [2024-06-21 19:58:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:58:40,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790416984] [2024-06-21 19:58:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:58:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:58:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:58:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:58:44,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:58:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790416984] [2024-06-21 19:58:44,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790416984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:58:44,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:58:44,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:58:44,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576999330] [2024-06-21 19:58:44,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:58:44,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:58:44,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:58:44,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:58:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:58:44,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:58:44,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 671 transitions, 14033 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) [2024-06-21 19:58:44,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:58:44,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:58:44,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:58:47,251 INFO L124 PetriNetUnfolderBase]: 5837/9387 cut-off events. [2024-06-21 19:58:47,251 INFO L125 PetriNetUnfolderBase]: For 825646/825646 co-relation queries the response was YES. [2024-06-21 19:58:47,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83417 conditions, 9387 events. 5837/9387 cut-off events. For 825646/825646 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 64315 event pairs, 1604 based on Foata normal form. 2/9377 useless extension candidates. Maximal degree in co-relation 83223. Up to 8767 conditions per place. [2024-06-21 19:58:47,387 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 135 changer transitions 0/695 dead transitions. [2024-06-21 19:58:47,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 695 transitions, 15550 flow [2024-06-21 19:58:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:58:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:58:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 19:58:47,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 19:58:47,388 INFO L175 Difference]: Start difference. First operand has 421 places, 671 transitions, 14033 flow. Second operand 9 states and 150 transitions. [2024-06-21 19:58:47,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 695 transitions, 15550 flow [2024-06-21 19:58:51,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 695 transitions, 15011 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 19:58:51,566 INFO L231 Difference]: Finished difference. Result has 421 places, 671 transitions, 13769 flow [2024-06-21 19:58:51,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13494, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13769, PETRI_PLACES=421, PETRI_TRANSITIONS=671} [2024-06-21 19:58:51,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-21 19:58:51,567 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 671 transitions, 13769 flow [2024-06-21 19:58:51,567 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) [2024-06-21 19:58:51,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:58:51,567 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] [2024-06-21 19:58:51,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:58:51,567 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)] === [2024-06-21 19:58:51,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:58:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 681730439, now seen corresponding path program 12 times [2024-06-21 19:58:51,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:58:51,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061576653] [2024-06-21 19:58:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:58:51,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:58:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:58:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:58:56,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:58:56,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061576653] [2024-06-21 19:58:56,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061576653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:58:56,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:58:56,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:58:56,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127162953] [2024-06-21 19:58:56,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:58:56,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:58:56,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:58:56,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:58:56,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:58:56,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:58:56,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 671 transitions, 13769 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) [2024-06-21 19:58:56,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:58:56,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:58:56,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:58:59,246 INFO L124 PetriNetUnfolderBase]: 5825/9347 cut-off events. [2024-06-21 19:58:59,246 INFO L125 PetriNetUnfolderBase]: For 819569/819569 co-relation queries the response was YES. [2024-06-21 19:58:59,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82674 conditions, 9347 events. 5825/9347 cut-off events. For 819569/819569 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 63706 event pairs, 1346 based on Foata normal form. 2/9337 useless extension candidates. Maximal degree in co-relation 82480. Up to 6414 conditions per place. [2024-06-21 19:58:59,367 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 505 selfloop transitions, 200 changer transitions 0/710 dead transitions. [2024-06-21 19:58:59,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 710 transitions, 15637 flow [2024-06-21 19:58:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:58:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:58:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:58:59,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 19:58:59,368 INFO L175 Difference]: Start difference. First operand has 421 places, 671 transitions, 13769 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:58:59,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 710 transitions, 15637 flow [2024-06-21 19:59:03,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 710 transitions, 15326 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 19:59:03,735 INFO L231 Difference]: Finished difference. Result has 422 places, 671 transitions, 13863 flow [2024-06-21 19:59:03,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13458, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13863, PETRI_PLACES=422, PETRI_TRANSITIONS=671} [2024-06-21 19:59:03,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 19:59:03,735 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 671 transitions, 13863 flow [2024-06-21 19:59:03,735 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) [2024-06-21 19:59:03,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:59:03,736 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] [2024-06-21 19:59:03,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:59:03,736 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)] === [2024-06-21 19:59:03,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:59:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2024153217, now seen corresponding path program 2 times [2024-06-21 19:59:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:59:03,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059330379] [2024-06-21 19:59:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:59:03,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:59:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:59:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:59:07,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:59:07,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059330379] [2024-06-21 19:59:07,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059330379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:59:07,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:59:07,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:59:07,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089482383] [2024-06-21 19:59:07,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:59:07,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:59:07,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:59:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:59:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:59:07,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:59:07,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 671 transitions, 13863 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) [2024-06-21 19:59:07,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:59:07,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:59:07,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:59:10,436 INFO L124 PetriNetUnfolderBase]: 5845/9384 cut-off events. [2024-06-21 19:59:10,437 INFO L125 PetriNetUnfolderBase]: For 828131/828131 co-relation queries the response was YES. [2024-06-21 19:59:10,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83718 conditions, 9384 events. 5845/9384 cut-off events. For 828131/828131 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 64309 event pairs, 1566 based on Foata normal form. 2/9383 useless extension candidates. Maximal degree in co-relation 83523. Up to 8865 conditions per place. [2024-06-21 19:59:10,567 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 627 selfloop transitions, 83 changer transitions 0/715 dead transitions. [2024-06-21 19:59:10,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 715 transitions, 15638 flow [2024-06-21 19:59:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:59:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:59:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:59:10,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 19:59:10,568 INFO L175 Difference]: Start difference. First operand has 422 places, 671 transitions, 13863 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:59:10,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 715 transitions, 15638 flow [2024-06-21 19:59:14,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 715 transitions, 15334 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:59:14,765 INFO L231 Difference]: Finished difference. Result has 424 places, 677 transitions, 13853 flow [2024-06-21 19:59:14,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13559, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13853, PETRI_PLACES=424, PETRI_TRANSITIONS=677} [2024-06-21 19:59:14,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-21 19:59:14,766 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 677 transitions, 13853 flow [2024-06-21 19:59:14,766 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) [2024-06-21 19:59:14,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:59:14,766 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] [2024-06-21 19:59:14,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:59:14,766 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)] === [2024-06-21 19:59:14,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:59:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1425062281, now seen corresponding path program 3 times [2024-06-21 19:59:14,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:59:14,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639476448] [2024-06-21 19:59:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:59:14,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:59:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:59:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:59:18,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:59:18,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639476448] [2024-06-21 19:59:18,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639476448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:59:18,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:59:18,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:59:18,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906104077] [2024-06-21 19:59:18,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:59:18,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:59:18,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:59:18,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:59:18,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:59:18,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:59:18,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 677 transitions, 13853 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) [2024-06-21 19:59:18,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:59:18,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:59:18,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:59:22,046 INFO L124 PetriNetUnfolderBase]: 5839/9392 cut-off events. [2024-06-21 19:59:22,046 INFO L125 PetriNetUnfolderBase]: For 835543/835543 co-relation queries the response was YES. [2024-06-21 19:59:22,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82992 conditions, 9392 events. 5839/9392 cut-off events. For 835543/835543 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 64464 event pairs, 1733 based on Foata normal form. 2/9391 useless extension candidates. Maximal degree in co-relation 82796. Up to 8671 conditions per place. [2024-06-21 19:59:22,180 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 160 changer transitions 0/739 dead transitions. [2024-06-21 19:59:22,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 739 transitions, 15712 flow [2024-06-21 19:59:22,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:59:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:59:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 250 transitions. [2024-06-21 19:59:22,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 19:59:22,181 INFO L175 Difference]: Start difference. First operand has 424 places, 677 transitions, 13853 flow. Second operand 14 states and 250 transitions. [2024-06-21 19:59:22,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 739 transitions, 15712 flow [2024-06-21 19:59:27,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 739 transitions, 15528 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 19:59:27,262 INFO L231 Difference]: Finished difference. Result has 431 places, 677 transitions, 14025 flow [2024-06-21 19:59:27,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13669, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14025, PETRI_PLACES=431, PETRI_TRANSITIONS=677} [2024-06-21 19:59:27,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-21 19:59:27,263 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 677 transitions, 14025 flow [2024-06-21 19:59:27,263 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) [2024-06-21 19:59:27,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:59:27,263 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] [2024-06-21 19:59:27,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:59:27,263 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)] === [2024-06-21 19:59:27,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:59:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1740240633, now seen corresponding path program 13 times [2024-06-21 19:59:27,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:59:27,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083944477] [2024-06-21 19:59:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:59:27,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:59:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:59:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:59:30,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:59:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083944477] [2024-06-21 19:59:30,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083944477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:59:30,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:59:30,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:59:30,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720044973] [2024-06-21 19:59:30,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:59:30,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:59:30,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:59:30,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:59:30,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:59:30,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:59:30,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 677 transitions, 14025 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:59:30,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:59:30,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:59:30,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:59:33,861 INFO L124 PetriNetUnfolderBase]: 5834/9367 cut-off events. [2024-06-21 19:59:33,861 INFO L125 PetriNetUnfolderBase]: For 841044/841047 co-relation queries the response was YES. [2024-06-21 19:59:33,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83139 conditions, 9367 events. 5834/9367 cut-off events. For 841044/841047 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 64293 event pairs, 1800 based on Foata normal form. 4/9366 useless extension candidates. Maximal degree in co-relation 82942. Up to 8721 conditions per place. [2024-06-21 19:59:34,000 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 604 selfloop transitions, 112 changer transitions 0/721 dead transitions. [2024-06-21 19:59:34,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 721 transitions, 15964 flow [2024-06-21 19:59:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:59:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:59:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 19:59:34,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 19:59:34,002 INFO L175 Difference]: Start difference. First operand has 431 places, 677 transitions, 14025 flow. Second operand 9 states and 166 transitions. [2024-06-21 19:59:34,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 721 transitions, 15964 flow [2024-06-21 19:59:38,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 721 transitions, 15408 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-21 19:59:38,306 INFO L231 Difference]: Finished difference. Result has 430 places, 677 transitions, 13705 flow [2024-06-21 19:59:38,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13473, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13705, PETRI_PLACES=430, PETRI_TRANSITIONS=677} [2024-06-21 19:59:38,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-21 19:59:38,307 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 677 transitions, 13705 flow [2024-06-21 19:59:38,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:59:38,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:59:38,307 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] [2024-06-21 19:59:38,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:59:38,307 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)] === [2024-06-21 19:59:38,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:59:38,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1740180183, now seen corresponding path program 14 times [2024-06-21 19:59:38,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:59:38,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82693577] [2024-06-21 19:59:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:59:38,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:59:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:59:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:59:42,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:59:42,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82693577] [2024-06-21 19:59:42,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82693577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:59:42,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:59:42,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:59:42,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141684700] [2024-06-21 19:59:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:59:42,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:59:42,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:59:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:59:42,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:59:42,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:59:42,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 677 transitions, 13705 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:59:42,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:59:42,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:59:42,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:59:45,046 INFO L124 PetriNetUnfolderBase]: 5829/9387 cut-off events. [2024-06-21 19:59:45,047 INFO L125 PetriNetUnfolderBase]: For 812416/812419 co-relation queries the response was YES. [2024-06-21 19:59:45,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82146 conditions, 9387 events. 5829/9387 cut-off events. For 812416/812419 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 64525 event pairs, 1774 based on Foata normal form. 4/9386 useless extension candidates. Maximal degree in co-relation 81949. Up to 8784 conditions per place. [2024-06-21 19:59:45,184 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 606 selfloop transitions, 104 changer transitions 0/715 dead transitions. [2024-06-21 19:59:45,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 715 transitions, 15416 flow [2024-06-21 19:59:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:59:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:59:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 19:59:45,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 19:59:45,186 INFO L175 Difference]: Start difference. First operand has 430 places, 677 transitions, 13705 flow. Second operand 9 states and 161 transitions. [2024-06-21 19:59:45,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 715 transitions, 15416 flow [2024-06-21 19:59:49,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 715 transitions, 15181 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 19:59:49,192 INFO L231 Difference]: Finished difference. Result has 432 places, 677 transitions, 13686 flow [2024-06-21 19:59:49,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13470, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13686, PETRI_PLACES=432, PETRI_TRANSITIONS=677} [2024-06-21 19:59:49,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-21 19:59:49,193 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 677 transitions, 13686 flow [2024-06-21 19:59:49,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:59:49,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:59:49,193 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] [2024-06-21 19:59:49,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:59:49,193 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)] === [2024-06-21 19:59:49,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:59:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1888063913, now seen corresponding path program 15 times [2024-06-21 19:59:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:59:49,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132146647] [2024-06-21 19:59:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:59:49,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:59:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:59:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:59:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:59:53,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132146647] [2024-06-21 19:59:53,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132146647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:59:53,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:59:53,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:59:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670632247] [2024-06-21 19:59:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:59:53,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:59:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:59:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:59:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:59:53,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:59:53,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 677 transitions, 13686 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) [2024-06-21 19:59:53,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:59:53,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:59:53,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:59:56,023 INFO L124 PetriNetUnfolderBase]: 5817/9346 cut-off events. [2024-06-21 19:59:56,023 INFO L125 PetriNetUnfolderBase]: For 811605/811605 co-relation queries the response was YES. [2024-06-21 19:59:56,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81837 conditions, 9346 events. 5817/9346 cut-off events. For 811605/811605 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 63810 event pairs, 1439 based on Foata normal form. 2/9345 useless extension candidates. Maximal degree in co-relation 81639. Up to 8091 conditions per place. [2024-06-21 19:59:56,160 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 604 selfloop transitions, 115 changer transitions 0/724 dead transitions. [2024-06-21 19:59:56,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 724 transitions, 15443 flow [2024-06-21 19:59:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:59:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:59:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 19:59:56,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 19:59:56,161 INFO L175 Difference]: Start difference. First operand has 432 places, 677 transitions, 13686 flow. Second operand 9 states and 173 transitions. [2024-06-21 19:59:56,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 724 transitions, 15443 flow [2024-06-21 20:00:00,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 724 transitions, 15229 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 20:00:00,623 INFO L231 Difference]: Finished difference. Result has 434 places, 677 transitions, 13742 flow [2024-06-21 20:00:00,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13472, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13742, PETRI_PLACES=434, PETRI_TRANSITIONS=677} [2024-06-21 20:00:00,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 20:00:00,623 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 677 transitions, 13742 flow [2024-06-21 20:00:00,623 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) [2024-06-21 20:00:00,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:00:00,623 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, 1] [2024-06-21 20:00:00,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:00:00,623 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)] === [2024-06-21 20:00:00,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:00:00,624 INFO L85 PathProgramCache]: Analyzing trace with hash 225499706, now seen corresponding path program 1 times [2024-06-21 20:00:00,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:00:00,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917191190] [2024-06-21 20:00:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:00:00,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:00:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:00:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:00:04,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:00:04,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917191190] [2024-06-21 20:00:04,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917191190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:00:04,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:00:04,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:00:04,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990253912] [2024-06-21 20:00:04,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:00:04,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:00:04,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:00:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:00:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:00:04,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:00:04,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 677 transitions, 13742 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) [2024-06-21 20:00:04,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:00:04,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:00:04,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:00:07,914 INFO L124 PetriNetUnfolderBase]: 5837/9402 cut-off events. [2024-06-21 20:00:07,914 INFO L125 PetriNetUnfolderBase]: For 829489/829489 co-relation queries the response was YES. [2024-06-21 20:00:08,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82507 conditions, 9402 events. 5837/9402 cut-off events. For 829489/829489 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 64773 event pairs, 1685 based on Foata normal form. 4/9403 useless extension candidates. Maximal degree in co-relation 82309. Up to 8469 conditions per place. [2024-06-21 20:00:08,042 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 524 selfloop transitions, 194 changer transitions 0/723 dead transitions. [2024-06-21 20:00:08,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 723 transitions, 15741 flow [2024-06-21 20:00:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:00:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:00:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 20:00:08,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-21 20:00:08,043 INFO L175 Difference]: Start difference. First operand has 434 places, 677 transitions, 13742 flow. Second operand 11 states and 193 transitions. [2024-06-21 20:00:08,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 723 transitions, 15741 flow [2024-06-21 20:00:12,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 723 transitions, 15556 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:00:12,959 INFO L231 Difference]: Finished difference. Result has 439 places, 680 transitions, 14008 flow [2024-06-21 20:00:12,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13557, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14008, PETRI_PLACES=439, PETRI_TRANSITIONS=680} [2024-06-21 20:00:12,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 20:00:12,959 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 680 transitions, 14008 flow [2024-06-21 20:00:12,959 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) [2024-06-21 20:00:12,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:00:12,959 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, 1] [2024-06-21 20:00:12,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:00:12,960 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)] === [2024-06-21 20:00:12,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:00:12,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2025087820, now seen corresponding path program 2 times [2024-06-21 20:00:12,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:00:12,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335526766] [2024-06-21 20:00:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:00:12,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:00:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:00:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:00:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:00:16,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335526766] [2024-06-21 20:00:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335526766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:00:16,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:00:16,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:00:16,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788008006] [2024-06-21 20:00:16,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:00:16,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:00:16,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:00:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:00:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:00:16,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:00:16,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 680 transitions, 14008 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) [2024-06-21 20:00:16,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:00:16,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:00:16,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:00:20,031 INFO L124 PetriNetUnfolderBase]: 5889/9430 cut-off events. [2024-06-21 20:00:20,031 INFO L125 PetriNetUnfolderBase]: For 864141/864144 co-relation queries the response was YES. [2024-06-21 20:00:20,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84746 conditions, 9430 events. 5889/9430 cut-off events. For 864141/864144 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 64301 event pairs, 1337 based on Foata normal form. 6/9431 useless extension candidates. Maximal degree in co-relation 84547. Up to 7544 conditions per place. [2024-06-21 20:00:20,172 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 384 selfloop transitions, 356 changer transitions 0/745 dead transitions. [2024-06-21 20:00:20,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 745 transitions, 16865 flow [2024-06-21 20:00:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:00:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:00:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-21 20:00:20,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 20:00:20,173 INFO L175 Difference]: Start difference. First operand has 439 places, 680 transitions, 14008 flow. Second operand 12 states and 212 transitions. [2024-06-21 20:00:20,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 745 transitions, 16865 flow [2024-06-21 20:00:24,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 745 transitions, 16468 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 20:00:25,104 INFO L231 Difference]: Finished difference. Result has 444 places, 689 transitions, 14494 flow [2024-06-21 20:00:25,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13611, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14494, PETRI_PLACES=444, PETRI_TRANSITIONS=689} [2024-06-21 20:00:25,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 20:00:25,105 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 689 transitions, 14494 flow [2024-06-21 20:00:25,105 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) [2024-06-21 20:00:25,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:00:25,105 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, 1] [2024-06-21 20:00:25,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:00:25,105 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)] === [2024-06-21 20:00:25,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:00:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -237923274, now seen corresponding path program 3 times [2024-06-21 20:00:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:00:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915651756] [2024-06-21 20:00:25,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:00:25,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:00:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:00:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:00:29,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:00:29,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915651756] [2024-06-21 20:00:29,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915651756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:00:29,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:00:29,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:00:29,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006019358] [2024-06-21 20:00:29,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:00:29,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:00:29,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:00:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:00:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:00:29,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:00:29,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 689 transitions, 14494 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) [2024-06-21 20:00:29,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:00:29,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:00:29,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:00:32,041 INFO L124 PetriNetUnfolderBase]: 5909/9466 cut-off events. [2024-06-21 20:00:32,041 INFO L125 PetriNetUnfolderBase]: For 891556/891559 co-relation queries the response was YES. [2024-06-21 20:00:32,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86326 conditions, 9466 events. 5909/9466 cut-off events. For 891556/891559 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 64836 event pairs, 1327 based on Foata normal form. 6/9467 useless extension candidates. Maximal degree in co-relation 86127. Up to 7560 conditions per place. [2024-06-21 20:00:32,173 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 408 selfloop transitions, 329 changer transitions 0/742 dead transitions. [2024-06-21 20:00:32,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 742 transitions, 17011 flow [2024-06-21 20:00:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:00:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:00:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 20:00:32,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 20:00:32,175 INFO L175 Difference]: Start difference. First operand has 444 places, 689 transitions, 14494 flow. Second operand 10 states and 186 transitions. [2024-06-21 20:00:32,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 742 transitions, 17011 flow [2024-06-21 20:00:36,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 742 transitions, 16496 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-21 20:00:36,739 INFO L231 Difference]: Finished difference. Result has 447 places, 692 transitions, 14711 flow [2024-06-21 20:00:36,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14009, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14711, PETRI_PLACES=447, PETRI_TRANSITIONS=692} [2024-06-21 20:00:36,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-21 20:00:36,739 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 692 transitions, 14711 flow [2024-06-21 20:00:36,739 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) [2024-06-21 20:00:36,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:00:36,739 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, 1] [2024-06-21 20:00:36,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:00:36,740 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)] === [2024-06-21 20:00:36,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:00:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash 958186550, now seen corresponding path program 4 times [2024-06-21 20:00:36,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:00:36,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351103151] [2024-06-21 20:00:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:00:36,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:00:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:00:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:00:40,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:00:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351103151] [2024-06-21 20:00:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351103151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:00:40,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:00:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:00:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044944105] [2024-06-21 20:00:40,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:00:40,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:00:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:00:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:00:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:00:40,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:00:40,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 692 transitions, 14711 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) [2024-06-21 20:00:40,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:00:40,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:00:40,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:00:43,460 INFO L124 PetriNetUnfolderBase]: 5961/9555 cut-off events. [2024-06-21 20:00:43,460 INFO L125 PetriNetUnfolderBase]: For 920739/920742 co-relation queries the response was YES. [2024-06-21 20:00:43,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86201 conditions, 9555 events. 5961/9555 cut-off events. For 920739/920742 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 65662 event pairs, 1430 based on Foata normal form. 6/9556 useless extension candidates. Maximal degree in co-relation 86002. Up to 7600 conditions per place. [2024-06-21 20:00:43,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 311 changer transitions 0/741 dead transitions. [2024-06-21 20:00:43,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 741 transitions, 17154 flow [2024-06-21 20:00:43,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:00:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:00:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 20:00:43,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 20:00:43,605 INFO L175 Difference]: Start difference. First operand has 447 places, 692 transitions, 14711 flow. Second operand 10 states and 176 transitions. [2024-06-21 20:00:43,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 741 transitions, 17154 flow [2024-06-21 20:00:47,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 741 transitions, 16497 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:00:47,719 INFO L231 Difference]: Finished difference. Result has 449 places, 698 transitions, 14769 flow [2024-06-21 20:00:47,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14063, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14769, PETRI_PLACES=449, PETRI_TRANSITIONS=698} [2024-06-21 20:00:47,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-21 20:00:47,720 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 698 transitions, 14769 flow [2024-06-21 20:00:47,720 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) [2024-06-21 20:00:47,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:00:47,720 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, 1] [2024-06-21 20:00:47,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:00:47,720 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:00:47,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:00:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1010635840, now seen corresponding path program 1 times [2024-06-21 20:00:47,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:00:47,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744857336] [2024-06-21 20:00:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:00:47,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:00:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:00:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:00:51,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:00:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744857336] [2024-06-21 20:00:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744857336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:00:51,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:00:51,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:00:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919085410] [2024-06-21 20:00:51,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:00:51,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:00:51,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:00:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:00:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:00:51,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:00:51,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 698 transitions, 14769 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) [2024-06-21 20:00:51,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:00:51,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:00:51,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:00:55,263 INFO L124 PetriNetUnfolderBase]: 6016/9658 cut-off events. [2024-06-21 20:00:55,263 INFO L125 PetriNetUnfolderBase]: For 961608/961608 co-relation queries the response was YES. [2024-06-21 20:00:55,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87025 conditions, 9658 events. 6016/9658 cut-off events. For 961608/961608 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 66138 event pairs, 1390 based on Foata normal form. 8/9663 useless extension candidates. Maximal degree in co-relation 86824. Up to 8609 conditions per place. [2024-06-21 20:00:55,402 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 621 selfloop transitions, 122 changer transitions 0/748 dead transitions. [2024-06-21 20:00:55,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 748 transitions, 16828 flow [2024-06-21 20:00:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:00:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:00:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 20:00:55,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 20:00:55,403 INFO L175 Difference]: Start difference. First operand has 449 places, 698 transitions, 14769 flow. Second operand 10 states and 181 transitions. [2024-06-21 20:00:55,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 748 transitions, 16828 flow [2024-06-21 20:00:59,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 748 transitions, 16361 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:00:59,985 INFO L231 Difference]: Finished difference. Result has 454 places, 702 transitions, 14690 flow [2024-06-21 20:00:59,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14302, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14690, PETRI_PLACES=454, PETRI_TRANSITIONS=702} [2024-06-21 20:00:59,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-21 20:00:59,986 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 702 transitions, 14690 flow [2024-06-21 20:00:59,986 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) [2024-06-21 20:00:59,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:00:59,986 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, 1] [2024-06-21 20:00:59,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:00:59,986 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:00:59,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:00:59,986 INFO L85 PathProgramCache]: Analyzing trace with hash -87237814, now seen corresponding path program 1 times [2024-06-21 20:00:59,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:00:59,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197248270] [2024-06-21 20:00:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:00:59,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:01:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:01:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:01:04,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:01:04,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197248270] [2024-06-21 20:01:04,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197248270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:01:04,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:01:04,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:01:04,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142787736] [2024-06-21 20:01:04,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:01:04,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:01:04,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:01:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:01:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:01:04,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:01:04,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 702 transitions, 14690 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-21 20:01:04,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:01:04,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:01:04,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:01:07,640 INFO L124 PetriNetUnfolderBase]: 6116/9807 cut-off events. [2024-06-21 20:01:07,641 INFO L125 PetriNetUnfolderBase]: For 1039962/1039965 co-relation queries the response was YES. [2024-06-21 20:01:07,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89581 conditions, 9807 events. 6116/9807 cut-off events. For 1039962/1039965 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 67711 event pairs, 1816 based on Foata normal form. 10/9812 useless extension candidates. Maximal degree in co-relation 89379. Up to 8516 conditions per place. [2024-06-21 20:01:07,767 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 508 selfloop transitions, 247 changer transitions 0/760 dead transitions. [2024-06-21 20:01:07,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 760 transitions, 16926 flow [2024-06-21 20:01:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:01:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:01:07,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 20:01:07,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-21 20:01:07,768 INFO L175 Difference]: Start difference. First operand has 454 places, 702 transitions, 14690 flow. Second operand 11 states and 200 transitions. [2024-06-21 20:01:07,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 760 transitions, 16926 flow [2024-06-21 20:01:12,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 760 transitions, 16723 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:01:12,011 INFO L231 Difference]: Finished difference. Result has 458 places, 704 transitions, 15053 flow [2024-06-21 20:01:12,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14487, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15053, PETRI_PLACES=458, PETRI_TRANSITIONS=704} [2024-06-21 20:01:12,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-21 20:01:12,012 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 704 transitions, 15053 flow [2024-06-21 20:01:12,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-21 20:01:12,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:01:12,012 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, 1] [2024-06-21 20:01:12,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:01:12,012 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:01:12,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:01:12,012 INFO L85 PathProgramCache]: Analyzing trace with hash 553150912, now seen corresponding path program 2 times [2024-06-21 20:01:12,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:01:12,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760533124] [2024-06-21 20:01:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:01:12,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:01:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:01:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:01:16,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:01:16,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760533124] [2024-06-21 20:01:16,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760533124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:01:16,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:01:16,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:01:16,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966123997] [2024-06-21 20:01:16,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:01:16,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:01:16,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:01:16,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:01:16,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:01:16,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:01:16,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 704 transitions, 15053 flow. Second operand has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:01:16,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:01:16,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:01:16,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:01:20,017 INFO L124 PetriNetUnfolderBase]: 6160/9885 cut-off events. [2024-06-21 20:01:20,018 INFO L125 PetriNetUnfolderBase]: For 1081588/1081591 co-relation queries the response was YES. [2024-06-21 20:01:20,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90744 conditions, 9885 events. 6160/9885 cut-off events. For 1081588/1081591 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 68330 event pairs, 1860 based on Foata normal form. 14/9894 useless extension candidates. Maximal degree in co-relation 90541. Up to 8868 conditions per place. [2024-06-21 20:01:20,171 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 511 selfloop transitions, 236 changer transitions 0/752 dead transitions. [2024-06-21 20:01:20,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 752 transitions, 16999 flow [2024-06-21 20:01:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:01:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:01:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-21 20:01:20,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 20:01:20,172 INFO L175 Difference]: Start difference. First operand has 458 places, 704 transitions, 15053 flow. Second operand 12 states and 202 transitions. [2024-06-21 20:01:20,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 752 transitions, 16999 flow [2024-06-21 20:01:25,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 752 transitions, 16807 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:01:25,220 INFO L231 Difference]: Finished difference. Result has 465 places, 705 transitions, 15377 flow [2024-06-21 20:01:25,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14869, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15377, PETRI_PLACES=465, PETRI_TRANSITIONS=705} [2024-06-21 20:01:25,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-21 20:01:25,221 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 705 transitions, 15377 flow [2024-06-21 20:01:25,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:01:25,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:01:25,221 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, 1] [2024-06-21 20:01:25,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:01:25,221 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:01:25,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:01:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2061136822, now seen corresponding path program 3 times [2024-06-21 20:01:25,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:01:25,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875857438] [2024-06-21 20:01:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:01:25,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:01:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:01:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:01:29,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:01:29,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875857438] [2024-06-21 20:01:29,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875857438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:01:29,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:01:29,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:01:29,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484965692] [2024-06-21 20:01:29,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:01:29,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:01:29,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:01:29,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:01:29,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:01:29,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:01:29,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 705 transitions, 15377 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:01:29,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:01:29,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:01:29,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:01:33,046 INFO L124 PetriNetUnfolderBase]: 6188/9939 cut-off events. [2024-06-21 20:01:33,046 INFO L125 PetriNetUnfolderBase]: For 1075248/1075251 co-relation queries the response was YES. [2024-06-21 20:01:33,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91519 conditions, 9939 events. 6188/9939 cut-off events. For 1075248/1075251 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 68890 event pairs, 1840 based on Foata normal form. 10/9944 useless extension candidates. Maximal degree in co-relation 91313. Up to 8852 conditions per place. [2024-06-21 20:01:33,197 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 511 selfloop transitions, 242 changer transitions 0/758 dead transitions. [2024-06-21 20:01:33,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 758 transitions, 17365 flow [2024-06-21 20:01:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:01:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:01:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-21 20:01:33,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-06-21 20:01:33,198 INFO L175 Difference]: Start difference. First operand has 465 places, 705 transitions, 15377 flow. Second operand 12 states and 209 transitions. [2024-06-21 20:01:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 758 transitions, 17365 flow [2024-06-21 20:01:39,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 758 transitions, 16869 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 20:01:39,046 INFO L231 Difference]: Finished difference. Result has 467 places, 706 transitions, 15401 flow [2024-06-21 20:01:39,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14881, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15401, PETRI_PLACES=467, PETRI_TRANSITIONS=706} [2024-06-21 20:01:39,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-21 20:01:39,046 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 706 transitions, 15401 flow [2024-06-21 20:01:39,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:01:39,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:01:39,052 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, 1] [2024-06-21 20:01:39,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:01:39,052 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:01:39,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:01:39,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1855536460, now seen corresponding path program 4 times [2024-06-21 20:01:39,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:01:39,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012678873] [2024-06-21 20:01:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:01:39,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:01:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:01:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:01:43,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:01:43,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012678873] [2024-06-21 20:01:43,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012678873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:01:43,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:01:43,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:01:43,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139259565] [2024-06-21 20:01:43,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:01:43,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:01:43,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:01:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:01:43,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:01:43,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 20:01:43,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 706 transitions, 15401 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:01:43,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:01:43,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 20:01:43,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:01:47,212 INFO L124 PetriNetUnfolderBase]: 6400/10291 cut-off events. [2024-06-21 20:01:47,213 INFO L125 PetriNetUnfolderBase]: For 1410488/1410488 co-relation queries the response was YES. [2024-06-21 20:01:47,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93953 conditions, 10291 events. 6400/10291 cut-off events. For 1410488/1410488 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 71623 event pairs, 1788 based on Foata normal form. 64/10352 useless extension candidates. Maximal degree in co-relation 93747. Up to 8809 conditions per place. [2024-06-21 20:01:47,355 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 532 selfloop transitions, 158 changer transitions 68/763 dead transitions. [2024-06-21 20:01:47,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 763 transitions, 17651 flow [2024-06-21 20:01:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:01:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:01:47,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-21 20:01:47,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 20:01:47,356 INFO L175 Difference]: Start difference. First operand has 467 places, 706 transitions, 15401 flow. Second operand 12 states and 216 transitions. [2024-06-21 20:01:47,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 763 transitions, 17651 flow Killed by 15