./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.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/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.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/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.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 18:44:18,084 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:44:18,146 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:44:18,151 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:44:18,152 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:44:18,174 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:44:18,174 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:44:18,174 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:44:18,175 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:44:18,175 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:44:18,176 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:44:18,176 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:44:18,176 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:44:18,177 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:44:18,177 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:44:18,177 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:44:18,177 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:44:18,178 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:44:18,178 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:44:18,178 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:44:18,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:44:18,179 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:44:18,179 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:44:18,180 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:44:18,180 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:44:18,180 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:44:18,180 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:44:18,180 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:44:18,181 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:44:18,181 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:44:18,181 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:44:18,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:44:18,182 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:44:18,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:44:18,182 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:44:18,182 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:44:18,182 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:44:18,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:44:18,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:44:18,183 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:44:18,183 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:44:18,184 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:44:18,184 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:44:18,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:44:18,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:44:18,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:44:18,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:44:18,359 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:44:18,359 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:44:18,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-21 18:44:19,397 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:44:19,632 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:44:19,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-21 18:44:19,645 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c64631ca9/38ba91929a6d49859bcecdb17e750106/FLAGfd06de7c8 [2024-06-21 18:44:19,662 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c64631ca9/38ba91929a6d49859bcecdb17e750106 [2024-06-21 18:44:19,664 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:44:19,665 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:44:19,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 18:44:19,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:44:19,732 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:44:19,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:44:19,733 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:44:19,737 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:44:19,737 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:44:19" (1/2) ... [2024-06-21 18:44:19,738 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3ea2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:44:19, skipping insertion in model container [2024-06-21 18:44:19,738 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:44:19" (1/2) ... [2024-06-21 18:44:19,740 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e15a0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:44:19, skipping insertion in model container [2024-06-21 18:44:19,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:44:19" (2/2) ... [2024-06-21 18:44:19,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3ea2ba and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:19, skipping insertion in model container [2024-06-21 18:44:19,742 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:44:19" (2/2) ... [2024-06-21 18:44:19,742 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:44:19,772 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:44:19,774 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff1 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:44:19,774 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff1 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:44:19,774 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$flush_delayed) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$r_buff0_thd1 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd0) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff1 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd2) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0_used >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$read_delayed) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff0_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$r_buff1_thd1) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )z$w_buff0) + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z$w_buff0_used >= 0LL) && (long long )main$tmp_guard1 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )z$w_buff0_used >= 0LL) && (long long )x + (long long )z$r_buff0_thd1 >= 0LL) && (long long )x + (long long )z$w_buff0 >= 0LL) && (long long )x + (long long )z$w_buff0_used >= 0LL) && (long long )y + (long long )z$r_buff0_thd1 >= 0LL) && (long long )y + (long long )z$w_buff0 >= 0LL) && (long long )y + (long long )z$w_buff0_used >= 0LL) && (long long )z + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z + (long long )z$w_buff0 >= 0LL) && (long long )z + (long long )z$w_buff0_used >= 0LL) && (long long )z$flush_delayed + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$flush_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$mem_tmp + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0 >= 0LL) && (long long )z$mem_tmp + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 + (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd1 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd2 + (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff1_thd3 + (long long )z$w_buff0_used >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0 >= 0LL) && (long long )z$read_delayed + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 + (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0_used + (long long )z$w_buff1_used >= 0LL) && (long long )weak$$choice0 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice0 + (long long )z$w_buff0_used >= 0LL) && (long long )weak$$choice2 + (long long )z$r_buff0_thd1 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )z$w_buff0_used >= 0LL) && (1LL + (long long )z$w_buff0_used) - (long long )z$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff0_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd2 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$read_delayed >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd1 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-21 18:44:19,774 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:44:19,774 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-21 18:44:19,811 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:44:20,094 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:44:20,108 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:44:20,310 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:44:20,341 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:44:20,356 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20 WrapperNode [2024-06-21 18:44:20,356 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:44:20,357 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:44:20,357 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:44:20,357 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:44:20,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,389 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,423 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-21 18:44:20,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:44:20,425 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:44:20,425 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:44:20,425 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:44:20,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,444 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,460 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 18:44:20,460 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,460 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,473 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,474 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,477 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,479 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:44:20,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:44:20,484 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:44:20,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:44:20,485 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (1/1) ... [2024-06-21 18:44:20,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:44:20,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:44:20,505 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 18:44:20,542 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 18:44:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:44:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:44:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:44:20,566 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:44:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:44:20,566 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:44:20,566 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:44:20,567 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:44:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:44:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:44:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:44:20,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:44:20,568 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 18:44:20,675 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:44:20,677 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:44:21,207 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:44:21,208 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:44:21,369 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:44:21,369 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:44:21,370 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:44:21 BoogieIcfgContainer [2024-06-21 18:44:21,370 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:44:21,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:44:21,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:44:21,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:44:21,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:44:19" (1/4) ... [2024-06-21 18:44:21,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e79edb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:44:21, skipping insertion in model container [2024-06-21 18:44:21,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:44:19" (2/4) ... [2024-06-21 18:44:21,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e79edb4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:44:21, skipping insertion in model container [2024-06-21 18:44:21,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:44:20" (3/4) ... [2024-06-21 18:44:21,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e79edb4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:44:21, skipping insertion in model container [2024-06-21 18:44:21,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:44:21" (4/4) ... [2024-06-21 18:44:21,376 INFO L112 eAbstractionObserver]: Analyzing ICFG mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-21 18:44:21,388 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:44:21,389 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:44:21,389 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:44:21,453 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:44:21,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 18:44:21,513 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 18:44:21,514 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:44:21,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:44:21,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 18:44:21,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 18:44:21,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:44:21,535 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;@ab846e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:44:21,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:44:21,540 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:44:21,541 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 18:44:21,541 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:44:21,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:21,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:44:21,542 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 18:44:21,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:21,548 INFO L85 PathProgramCache]: Analyzing trace with hash 373697404, now seen corresponding path program 1 times [2024-06-21 18:44:21,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:21,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245008287] [2024-06-21 18:44:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:21,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:22,996 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 18:44:22,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:22,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245008287] [2024-06-21 18:44:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245008287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:22,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:22,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:44:22,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039141827] [2024-06-21 18:44:23,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:23,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:44:23,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:44:23,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:44:23,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 18:44:23,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:23,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:23,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 18:44:23,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:23,522 INFO L124 PetriNetUnfolderBase]: 1359/2099 cut-off events. [2024-06-21 18:44:23,523 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 18:44:23,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4213 conditions, 2099 events. 1359/2099 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10050 event pairs, 941 based on Foata normal form. 1/2056 useless extension candidates. Maximal degree in co-relation 4201. Up to 2029 conditions per place. [2024-06-21 18:44:23,537 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 18:44:23,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-21 18:44:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:44:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:44:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-21 18:44:23,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 18:44:23,549 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 75 transitions. [2024-06-21 18:44:23,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-21 18:44:23,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:44:23,554 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 18:44:23,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 18:44:23,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 18:44:23,559 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 18:44:23,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:23,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:23,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:23,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:44:23,560 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 18:44:23,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1653924427, now seen corresponding path program 1 times [2024-06-21 18:44:23,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:23,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075679975] [2024-06-21 18:44:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:23,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075679975] [2024-06-21 18:44:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075679975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:24,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:24,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:44:24,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505452856] [2024-06-21 18:44:24,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:24,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:44:24,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:24,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:44:24,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:44:24,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 18:44:24,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:24,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:24,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 18:44:24,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:24,790 INFO L124 PetriNetUnfolderBase]: 1353/2090 cut-off events. [2024-06-21 18:44:24,790 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-21 18:44:24,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4746 conditions, 2090 events. 1353/2090 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10005 event pairs, 795 based on Foata normal form. 3/2082 useless extension candidates. Maximal degree in co-relation 4734. Up to 2005 conditions per place. [2024-06-21 18:44:24,801 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 18:44:24,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-21 18:44:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:44:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:44:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-21 18:44:24,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 18:44:24,805 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 97 transitions. [2024-06-21 18:44:24,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-21 18:44:24,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:44:24,808 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 18:44:24,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 18:44:24,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 18:44:24,809 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 18:44:24,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:24,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:24,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:24,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:44:24,812 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 18:44:24,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash -283436140, now seen corresponding path program 1 times [2024-06-21 18:44:24,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:24,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552910160] [2024-06-21 18:44:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:24,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:26,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552910160] [2024-06-21 18:44:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552910160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:26,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:26,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:44:26,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062933286] [2024-06-21 18:44:26,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:26,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:44:26,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:26,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:44:26,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:44:26,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 18:44:26,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:26,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:26,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 18:44:26,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:26,616 INFO L124 PetriNetUnfolderBase]: 1641/2510 cut-off events. [2024-06-21 18:44:26,616 INFO L125 PetriNetUnfolderBase]: For 1285/1285 co-relation queries the response was YES. [2024-06-21 18:44:26,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6293 conditions, 2510 events. 1641/2510 cut-off events. For 1285/1285 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11956 event pairs, 746 based on Foata normal form. 3/2500 useless extension candidates. Maximal degree in co-relation 6279. Up to 2393 conditions per place. [2024-06-21 18:44:26,629 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2024-06-21 18:44:26,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 72 transitions, 372 flow [2024-06-21 18:44:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:44:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:44:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-21 18:44:26,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-21 18:44:26,632 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 136 transitions. [2024-06-21 18:44:26,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 72 transitions, 372 flow [2024-06-21 18:44:26,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 72 transitions, 352 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 18:44:26,634 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 194 flow [2024-06-21 18:44:26,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-21 18:44:26,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 18:44:26,635 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 194 flow [2024-06-21 18:44:26,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:26,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:26,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:26,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:44:26,636 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 18:44:26,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1521759228, now seen corresponding path program 1 times [2024-06-21 18:44:26,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:26,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910329025] [2024-06-21 18:44:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:26,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:27,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:27,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910329025] [2024-06-21 18:44:27,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910329025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:27,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:27,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:27,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962104204] [2024-06-21 18:44:27,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:27,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:27,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:27,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:27,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 18:44:27,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 194 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:27,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:27,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 18:44:27,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:28,388 INFO L124 PetriNetUnfolderBase]: 1632/2495 cut-off events. [2024-06-21 18:44:28,388 INFO L125 PetriNetUnfolderBase]: For 2539/2539 co-relation queries the response was YES. [2024-06-21 18:44:28,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6972 conditions, 2495 events. 1632/2495 cut-off events. For 2539/2539 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11847 event pairs, 582 based on Foata normal form. 6/2488 useless extension candidates. Maximal degree in co-relation 6956. Up to 2348 conditions per place. [2024-06-21 18:44:28,400 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2024-06-21 18:44:28,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 78 transitions, 432 flow [2024-06-21 18:44:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:44:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:44:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-21 18:44:28,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-21 18:44:28,403 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 194 flow. Second operand 7 states and 153 transitions. [2024-06-21 18:44:28,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 78 transitions, 432 flow [2024-06-21 18:44:28,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 78 transitions, 404 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:44:28,406 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 215 flow [2024-06-21 18:44:28,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 18:44:28,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-21 18:44:28,407 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 215 flow [2024-06-21 18:44:28,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:28,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:28,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:28,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:44:28,408 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 18:44:28,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:28,408 INFO L85 PathProgramCache]: Analyzing trace with hash 825508084, now seen corresponding path program 1 times [2024-06-21 18:44:28,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:28,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602831806] [2024-06-21 18:44:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:28,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:29,596 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 18:44:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:29,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602831806] [2024-06-21 18:44:29,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602831806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:29,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:29,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:44:29,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422162403] [2024-06-21 18:44:29,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:29,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:44:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:29,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:44:29,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:44:29,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:44:29,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 215 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 18:44:29,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:29,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:44:29,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:30,295 INFO L124 PetriNetUnfolderBase]: 1627/2491 cut-off events. [2024-06-21 18:44:30,295 INFO L125 PetriNetUnfolderBase]: For 4094/4094 co-relation queries the response was YES. [2024-06-21 18:44:30,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7399 conditions, 2491 events. 1627/2491 cut-off events. For 4094/4094 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11857 event pairs, 963 based on Foata normal form. 2/2475 useless extension candidates. Maximal degree in co-relation 7381. Up to 2407 conditions per place. [2024-06-21 18:44:30,306 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 46 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-21 18:44:30,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 380 flow [2024-06-21 18:44:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:44:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:44:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 18:44:30,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-21 18:44:30,309 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 215 flow. Second operand 5 states and 92 transitions. [2024-06-21 18:44:30,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 380 flow [2024-06-21 18:44:30,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 339 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 18:44:30,316 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 240 flow [2024-06-21 18:44:30,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-21 18:44:30,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-21 18:44:30,319 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 240 flow [2024-06-21 18:44:30,320 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 18:44:30,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:30,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:44:30,320 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 18:44:30,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:30,321 INFO L85 PathProgramCache]: Analyzing trace with hash -179051478, now seen corresponding path program 1 times [2024-06-21 18:44:30,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:30,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147113048] [2024-06-21 18:44:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:31,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:31,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147113048] [2024-06-21 18:44:31,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147113048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:31,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:31,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:44:31,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107367010] [2024-06-21 18:44:31,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:31,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:44:31,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:31,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:44:31,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:44:32,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:44:32,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:32,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:32,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:44:32,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:32,668 INFO L124 PetriNetUnfolderBase]: 1883/2808 cut-off events. [2024-06-21 18:44:32,669 INFO L125 PetriNetUnfolderBase]: For 6426/6426 co-relation queries the response was YES. [2024-06-21 18:44:32,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8927 conditions, 2808 events. 1883/2808 cut-off events. For 6426/6426 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12876 event pairs, 1067 based on Foata normal form. 6/2813 useless extension candidates. Maximal degree in co-relation 8906. Up to 2725 conditions per place. [2024-06-21 18:44:32,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/79 dead transitions. [2024-06-21 18:44:32,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 510 flow [2024-06-21 18:44:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:44:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:44:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 18:44:32,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 18:44:32,684 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 240 flow. Second operand 6 states and 111 transitions. [2024-06-21 18:44:32,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 510 flow [2024-06-21 18:44:32,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 488 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 18:44:32,688 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 349 flow [2024-06-21 18:44:32,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2024-06-21 18:44:32,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-21 18:44:32,691 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 349 flow [2024-06-21 18:44:32,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:32,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:32,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:32,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:44:32,691 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 18:44:32,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash -694460595, now seen corresponding path program 1 times [2024-06-21 18:44:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:32,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121863396] [2024-06-21 18:44:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:32,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:34,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121863396] [2024-06-21 18:44:34,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121863396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:34,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:34,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:44:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517195516] [2024-06-21 18:44:34,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:34,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:44:34,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:44:34,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:44:34,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:44:34,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 349 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:34,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:34,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:44:34,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:34,711 INFO L124 PetriNetUnfolderBase]: 1751/2675 cut-off events. [2024-06-21 18:44:34,711 INFO L125 PetriNetUnfolderBase]: For 8642/8662 co-relation queries the response was YES. [2024-06-21 18:44:34,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9409 conditions, 2675 events. 1751/2675 cut-off events. For 8642/8662 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12940 event pairs, 899 based on Foata normal form. 6/2633 useless extension candidates. Maximal degree in co-relation 9383. Up to 2526 conditions per place. [2024-06-21 18:44:34,730 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 24 changer transitions 0/98 dead transitions. [2024-06-21 18:44:34,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 720 flow [2024-06-21 18:44:34,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:44:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:44:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 18:44:34,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 18:44:34,732 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 349 flow. Second operand 7 states and 133 transitions. [2024-06-21 18:44:34,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 720 flow [2024-06-21 18:44:34,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 98 transitions, 707 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 18:44:34,738 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 515 flow [2024-06-21 18:44:34,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=515, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2024-06-21 18:44:34,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-21 18:44:34,739 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 515 flow [2024-06-21 18:44:34,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:34,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:34,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:34,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:44:34,740 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 18:44:34,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1152014387, now seen corresponding path program 2 times [2024-06-21 18:44:34,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:34,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891540169] [2024-06-21 18:44:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:34,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:35,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:35,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891540169] [2024-06-21 18:44:35,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891540169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:35,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:35,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:44:35,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966746183] [2024-06-21 18:44:35,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:35,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:44:35,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:35,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:44:35,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:44:35,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:44:35,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 515 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:35,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:35,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:44:35,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:36,393 INFO L124 PetriNetUnfolderBase]: 1830/2782 cut-off events. [2024-06-21 18:44:36,394 INFO L125 PetriNetUnfolderBase]: For 11752/11772 co-relation queries the response was YES. [2024-06-21 18:44:36,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10706 conditions, 2782 events. 1830/2782 cut-off events. For 11752/11772 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13243 event pairs, 960 based on Foata normal form. 7/2750 useless extension candidates. Maximal degree in co-relation 10675. Up to 2638 conditions per place. [2024-06-21 18:44:36,410 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 67 selfloop transitions, 30 changer transitions 0/104 dead transitions. [2024-06-21 18:44:36,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 104 transitions, 917 flow [2024-06-21 18:44:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:44:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:44:36,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 18:44:36,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-21 18:44:36,411 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 515 flow. Second operand 6 states and 113 transitions. [2024-06-21 18:44:36,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 104 transitions, 917 flow [2024-06-21 18:44:36,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 867 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-21 18:44:36,421 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 700 flow [2024-06-21 18:44:36,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=700, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-21 18:44:36,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-21 18:44:36,422 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 700 flow [2024-06-21 18:44:36,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:36,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:36,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:36,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:44:36,423 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 18:44:36,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:36,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1218991803, now seen corresponding path program 3 times [2024-06-21 18:44:36,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:36,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560682573] [2024-06-21 18:44:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:36,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:37,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:37,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560682573] [2024-06-21 18:44:37,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560682573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:37,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:37,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:44:37,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176315663] [2024-06-21 18:44:37,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:37,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:44:37,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:37,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:44:37,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:44:37,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:44:37,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 700 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:37,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:37,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:44:37,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:38,033 INFO L124 PetriNetUnfolderBase]: 1822/2770 cut-off events. [2024-06-21 18:44:38,033 INFO L125 PetriNetUnfolderBase]: For 13397/13411 co-relation queries the response was YES. [2024-06-21 18:44:38,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10871 conditions, 2770 events. 1822/2770 cut-off events. For 13397/13411 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13175 event pairs, 958 based on Foata normal form. 3/2735 useless extension candidates. Maximal degree in co-relation 10836. Up to 2659 conditions per place. [2024-06-21 18:44:38,048 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 79 selfloop transitions, 16 changer transitions 0/102 dead transitions. [2024-06-21 18:44:38,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 102 transitions, 934 flow [2024-06-21 18:44:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:44:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:44:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 18:44:38,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:44:38,050 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 700 flow. Second operand 6 states and 108 transitions. [2024-06-21 18:44:38,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 102 transitions, 934 flow [2024-06-21 18:44:38,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 102 transitions, 843 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 18:44:38,061 INFO L231 Difference]: Finished difference. Result has 77 places, 88 transitions, 652 flow [2024-06-21 18:44:38,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=652, PETRI_PLACES=77, PETRI_TRANSITIONS=88} [2024-06-21 18:44:38,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-21 18:44:38,064 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 88 transitions, 652 flow [2024-06-21 18:44:38,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:38,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:38,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:38,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:44:38,064 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 18:44:38,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1103537183, now seen corresponding path program 1 times [2024-06-21 18:44:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:38,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300396605] [2024-06-21 18:44:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:38,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:39,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:39,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300396605] [2024-06-21 18:44:39,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300396605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:39,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:39,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590846893] [2024-06-21 18:44:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:39,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:39,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:39,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:39,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:39,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:44:39,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 88 transitions, 652 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:39,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:39,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:44:39,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:40,358 INFO L124 PetriNetUnfolderBase]: 1824/2771 cut-off events. [2024-06-21 18:44:40,358 INFO L125 PetriNetUnfolderBase]: For 15077/15094 co-relation queries the response was YES. [2024-06-21 18:44:40,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11021 conditions, 2771 events. 1824/2771 cut-off events. For 15077/15094 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13290 event pairs, 861 based on Foata normal form. 4/2728 useless extension candidates. Maximal degree in co-relation 10985. Up to 2615 conditions per place. [2024-06-21 18:44:40,369 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 98 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-21 18:44:40,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 138 transitions, 1184 flow [2024-06-21 18:44:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:44:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:44:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 18:44:40,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 18:44:40,371 INFO L175 Difference]: Start difference. First operand has 77 places, 88 transitions, 652 flow. Second operand 9 states and 170 transitions. [2024-06-21 18:44:40,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 138 transitions, 1184 flow [2024-06-21 18:44:40,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 138 transitions, 1130 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:44:40,380 INFO L231 Difference]: Finished difference. Result has 82 places, 103 transitions, 810 flow [2024-06-21 18:44:40,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=810, PETRI_PLACES=82, PETRI_TRANSITIONS=103} [2024-06-21 18:44:40,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-21 18:44:40,381 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 103 transitions, 810 flow [2024-06-21 18:44:40,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:40,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:40,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:40,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:44:40,382 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 18:44:40,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash -90491657, now seen corresponding path program 2 times [2024-06-21 18:44:40,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:40,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63044463] [2024-06-21 18:44:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:40,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:41,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:41,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63044463] [2024-06-21 18:44:41,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63044463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:41,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:41,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196336325] [2024-06-21 18:44:41,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:41,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:42,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:44:42,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 810 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:42,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:42,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:44:42,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:42,823 INFO L124 PetriNetUnfolderBase]: 1861/2834 cut-off events. [2024-06-21 18:44:42,823 INFO L125 PetriNetUnfolderBase]: For 18725/18742 co-relation queries the response was YES. [2024-06-21 18:44:42,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12076 conditions, 2834 events. 1861/2834 cut-off events. For 18725/18742 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13575 event pairs, 818 based on Foata normal form. 5/2799 useless extension candidates. Maximal degree in co-relation 12041. Up to 2668 conditions per place. [2024-06-21 18:44:42,861 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 98 selfloop transitions, 39 changer transitions 0/144 dead transitions. [2024-06-21 18:44:42,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 144 transitions, 1333 flow [2024-06-21 18:44:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 18:44:42,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 18:44:42,863 INFO L175 Difference]: Start difference. First operand has 82 places, 103 transitions, 810 flow. Second operand 8 states and 146 transitions. [2024-06-21 18:44:42,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 144 transitions, 1333 flow [2024-06-21 18:44:42,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 144 transitions, 1220 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 18:44:42,880 INFO L231 Difference]: Finished difference. Result has 88 places, 120 transitions, 991 flow [2024-06-21 18:44:42,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=991, PETRI_PLACES=88, PETRI_TRANSITIONS=120} [2024-06-21 18:44:42,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-21 18:44:42,881 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 120 transitions, 991 flow [2024-06-21 18:44:42,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:42,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:42,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:42,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:44:42,882 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 18:44:42,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash -628227265, now seen corresponding path program 3 times [2024-06-21 18:44:42,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:42,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898112371] [2024-06-21 18:44:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:42,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:44,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:44,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898112371] [2024-06-21 18:44:44,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898112371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:44,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:44,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:44,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479014315] [2024-06-21 18:44:44,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:44,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:44,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:44:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 120 transitions, 991 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:44:44,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:45,280 INFO L124 PetriNetUnfolderBase]: 1882/2867 cut-off events. [2024-06-21 18:44:45,280 INFO L125 PetriNetUnfolderBase]: For 21554/21574 co-relation queries the response was YES. [2024-06-21 18:44:45,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12572 conditions, 2867 events. 1882/2867 cut-off events. For 21554/21574 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13834 event pairs, 826 based on Foata normal form. 6/2832 useless extension candidates. Maximal degree in co-relation 12533. Up to 2593 conditions per place. [2024-06-21 18:44:45,312 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 79 selfloop transitions, 72 changer transitions 0/158 dead transitions. [2024-06-21 18:44:45,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 158 transitions, 1568 flow [2024-06-21 18:44:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 18:44:45,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 18:44:45,314 INFO L175 Difference]: Start difference. First operand has 88 places, 120 transitions, 991 flow. Second operand 8 states and 152 transitions. [2024-06-21 18:44:45,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 158 transitions, 1568 flow [2024-06-21 18:44:45,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 158 transitions, 1499 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 18:44:45,338 INFO L231 Difference]: Finished difference. Result has 94 places, 131 transitions, 1223 flow [2024-06-21 18:44:45,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1223, PETRI_PLACES=94, PETRI_TRANSITIONS=131} [2024-06-21 18:44:45,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-21 18:44:45,339 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 131 transitions, 1223 flow [2024-06-21 18:44:45,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:45,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:45,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:45,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:44:45,339 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 18:44:45,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:45,340 INFO L85 PathProgramCache]: Analyzing trace with hash -54622301, now seen corresponding path program 1 times [2024-06-21 18:44:45,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:45,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041029343] [2024-06-21 18:44:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:45,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:47,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:47,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041029343] [2024-06-21 18:44:47,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041029343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:47,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:47,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:47,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355384590] [2024-06-21 18:44:47,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:47,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:47,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:47,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:47,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:47,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:44:47,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 131 transitions, 1223 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:47,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:47,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:44:47,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:47,901 INFO L124 PetriNetUnfolderBase]: 2122/3160 cut-off events. [2024-06-21 18:44:47,901 INFO L125 PetriNetUnfolderBase]: For 30679/30682 co-relation queries the response was YES. [2024-06-21 18:44:47,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14851 conditions, 3160 events. 2122/3160 cut-off events. For 30679/30682 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14669 event pairs, 939 based on Foata normal form. 5/3162 useless extension candidates. Maximal degree in co-relation 14810. Up to 2918 conditions per place. [2024-06-21 18:44:47,919 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 139 selfloop transitions, 45 changer transitions 0/187 dead transitions. [2024-06-21 18:44:47,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 187 transitions, 2023 flow [2024-06-21 18:44:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:44:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:44:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 18:44:47,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-21 18:44:47,921 INFO L175 Difference]: Start difference. First operand has 94 places, 131 transitions, 1223 flow. Second operand 8 states and 153 transitions. [2024-06-21 18:44:47,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 187 transitions, 2023 flow [2024-06-21 18:44:47,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 187 transitions, 1926 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 18:44:47,947 INFO L231 Difference]: Finished difference. Result has 102 places, 152 transitions, 1433 flow [2024-06-21 18:44:47,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=102, PETRI_TRANSITIONS=152} [2024-06-21 18:44:47,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 18:44:47,948 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 152 transitions, 1433 flow [2024-06-21 18:44:47,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:47,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:47,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:47,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:44:47,949 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 18:44:47,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:47,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1352589167, now seen corresponding path program 4 times [2024-06-21 18:44:47,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:47,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479578201] [2024-06-21 18:44:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:47,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:49,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:49,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479578201] [2024-06-21 18:44:49,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479578201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:49,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:49,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:49,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510600686] [2024-06-21 18:44:49,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:49,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:49,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:49,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:49,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:49,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:44:49,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 152 transitions, 1433 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:49,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:49,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:44:49,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:49,886 INFO L124 PetriNetUnfolderBase]: 2142/3194 cut-off events. [2024-06-21 18:44:49,887 INFO L125 PetriNetUnfolderBase]: For 34995/34995 co-relation queries the response was YES. [2024-06-21 18:44:49,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15919 conditions, 3194 events. 2142/3194 cut-off events. For 34995/34995 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14820 event pairs, 1020 based on Foata normal form. 3/3196 useless extension candidates. Maximal degree in co-relation 15873. Up to 3102 conditions per place. [2024-06-21 18:44:49,906 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 145 selfloop transitions, 34 changer transitions 0/182 dead transitions. [2024-06-21 18:44:49,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 182 transitions, 1967 flow [2024-06-21 18:44:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:44:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:44:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 18:44:49,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 18:44:49,908 INFO L175 Difference]: Start difference. First operand has 102 places, 152 transitions, 1433 flow. Second operand 7 states and 120 transitions. [2024-06-21 18:44:49,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 182 transitions, 1967 flow [2024-06-21 18:44:49,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 182 transitions, 1899 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-21 18:44:49,940 INFO L231 Difference]: Finished difference. Result has 109 places, 165 transitions, 1607 flow [2024-06-21 18:44:49,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1607, PETRI_PLACES=109, PETRI_TRANSITIONS=165} [2024-06-21 18:44:49,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-21 18:44:49,941 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 165 transitions, 1607 flow [2024-06-21 18:44:49,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:49,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:49,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:49,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:44:49,942 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 18:44:49,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:49,942 INFO L85 PathProgramCache]: Analyzing trace with hash -442343717, now seen corresponding path program 2 times [2024-06-21 18:44:49,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:49,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172328223] [2024-06-21 18:44:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:49,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:51,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:51,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172328223] [2024-06-21 18:44:51,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172328223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:51,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:51,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:51,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152877298] [2024-06-21 18:44:51,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:51,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:51,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:51,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:51,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:51,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:44:51,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 165 transitions, 1607 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:51,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:51,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:44:51,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:51,878 INFO L124 PetriNetUnfolderBase]: 2294/3411 cut-off events. [2024-06-21 18:44:51,878 INFO L125 PetriNetUnfolderBase]: For 40908/40908 co-relation queries the response was YES. [2024-06-21 18:44:51,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17391 conditions, 3411 events. 2294/3411 cut-off events. For 40908/40908 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15968 event pairs, 1021 based on Foata normal form. 8/3416 useless extension candidates. Maximal degree in co-relation 17341. Up to 3098 conditions per place. [2024-06-21 18:44:51,901 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 168 selfloop transitions, 56 changer transitions 0/227 dead transitions. [2024-06-21 18:44:51,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 227 transitions, 2555 flow [2024-06-21 18:44:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:44:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:44:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 18:44:51,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 18:44:51,902 INFO L175 Difference]: Start difference. First operand has 109 places, 165 transitions, 1607 flow. Second operand 7 states and 135 transitions. [2024-06-21 18:44:51,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 227 transitions, 2555 flow [2024-06-21 18:44:51,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 227 transitions, 2506 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 18:44:51,942 INFO L231 Difference]: Finished difference. Result has 114 places, 194 transitions, 1971 flow [2024-06-21 18:44:51,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1971, PETRI_PLACES=114, PETRI_TRANSITIONS=194} [2024-06-21 18:44:51,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 18:44:51,943 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 194 transitions, 1971 flow [2024-06-21 18:44:51,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:51,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:51,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:51,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:44:51,944 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 18:44:51,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash -442343903, now seen corresponding path program 5 times [2024-06-21 18:44:51,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:51,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124989541] [2024-06-21 18:44:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:51,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:53,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:53,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124989541] [2024-06-21 18:44:53,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124989541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:53,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:53,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:53,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383922119] [2024-06-21 18:44:53,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:53,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:53,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:53,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:44:53,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 194 transitions, 1971 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:53,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:53,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:44:53,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:53,878 INFO L124 PetriNetUnfolderBase]: 2319/3447 cut-off events. [2024-06-21 18:44:53,878 INFO L125 PetriNetUnfolderBase]: For 48307/48313 co-relation queries the response was YES. [2024-06-21 18:44:53,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19012 conditions, 3447 events. 2319/3447 cut-off events. For 48307/48313 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16109 event pairs, 1038 based on Foata normal form. 7/3452 useless extension candidates. Maximal degree in co-relation 18959. Up to 3280 conditions per place. [2024-06-21 18:44:53,898 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 158 selfloop transitions, 62 changer transitions 0/223 dead transitions. [2024-06-21 18:44:53,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 223 transitions, 2648 flow [2024-06-21 18:44:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:44:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:44:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 18:44:53,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 18:44:53,901 INFO L175 Difference]: Start difference. First operand has 114 places, 194 transitions, 1971 flow. Second operand 7 states and 125 transitions. [2024-06-21 18:44:53,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 223 transitions, 2648 flow [2024-06-21 18:44:53,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 223 transitions, 2607 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-21 18:44:53,975 INFO L231 Difference]: Finished difference. Result has 120 places, 203 transitions, 2170 flow [2024-06-21 18:44:53,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2170, PETRI_PLACES=120, PETRI_TRANSITIONS=203} [2024-06-21 18:44:53,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-21 18:44:53,976 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 203 transitions, 2170 flow [2024-06-21 18:44:53,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:53,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:53,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:53,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:44:53,977 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 18:44:53,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash 866198615, now seen corresponding path program 3 times [2024-06-21 18:44:53,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:53,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133918516] [2024-06-21 18:44:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:53,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:54,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133918516] [2024-06-21 18:44:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133918516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:54,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:54,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:54,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707764400] [2024-06-21 18:44:54,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:54,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:54,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:54,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:55,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:44:55,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 203 transitions, 2170 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:55,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:55,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:44:55,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:55,760 INFO L124 PetriNetUnfolderBase]: 2344/3482 cut-off events. [2024-06-21 18:44:55,760 INFO L125 PetriNetUnfolderBase]: For 53367/53367 co-relation queries the response was YES. [2024-06-21 18:44:55,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19636 conditions, 3482 events. 2344/3482 cut-off events. For 53367/53367 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16307 event pairs, 1031 based on Foata normal form. 4/3485 useless extension candidates. Maximal degree in co-relation 19580. Up to 3388 conditions per place. [2024-06-21 18:44:55,785 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 203 selfloop transitions, 25 changer transitions 0/231 dead transitions. [2024-06-21 18:44:55,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 231 transitions, 2853 flow [2024-06-21 18:44:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:44:55,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:44:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 18:44:55,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 18:44:55,790 INFO L175 Difference]: Start difference. First operand has 120 places, 203 transitions, 2170 flow. Second operand 7 states and 125 transitions. [2024-06-21 18:44:55,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 231 transitions, 2853 flow [2024-06-21 18:44:55,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 231 transitions, 2714 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 18:44:55,860 INFO L231 Difference]: Finished difference. Result has 124 places, 211 transitions, 2189 flow [2024-06-21 18:44:55,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2189, PETRI_PLACES=124, PETRI_TRANSITIONS=211} [2024-06-21 18:44:55,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 18:44:55,861 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 211 transitions, 2189 flow [2024-06-21 18:44:55,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:55,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:55,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:55,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:44:55,861 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 18:44:55,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash -269969551, now seen corresponding path program 6 times [2024-06-21 18:44:55,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:55,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246810915] [2024-06-21 18:44:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:55,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:44:56,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:56,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246810915] [2024-06-21 18:44:56,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246810915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:56,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:56,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843412630] [2024-06-21 18:44:56,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:56,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:56,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:57,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:44:57,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 211 transitions, 2189 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:57,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:57,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:44:57,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:57,670 INFO L124 PetriNetUnfolderBase]: 2336/3471 cut-off events. [2024-06-21 18:44:57,671 INFO L125 PetriNetUnfolderBase]: For 57916/57916 co-relation queries the response was YES. [2024-06-21 18:44:57,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19871 conditions, 3471 events. 2336/3471 cut-off events. For 57916/57916 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16192 event pairs, 1037 based on Foata normal form. 3/3473 useless extension candidates. Maximal degree in co-relation 19812. Up to 3395 conditions per place. [2024-06-21 18:44:57,692 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 204 selfloop transitions, 22 changer transitions 0/229 dead transitions. [2024-06-21 18:44:57,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 229 transitions, 2728 flow [2024-06-21 18:44:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:44:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:44:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 18:44:57,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-21 18:44:57,693 INFO L175 Difference]: Start difference. First operand has 124 places, 211 transitions, 2189 flow. Second operand 7 states and 118 transitions. [2024-06-21 18:44:57,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 229 transitions, 2728 flow [2024-06-21 18:44:57,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 229 transitions, 2629 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 18:44:57,737 INFO L231 Difference]: Finished difference. Result has 127 places, 211 transitions, 2146 flow [2024-06-21 18:44:57,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2146, PETRI_PLACES=127, PETRI_TRANSITIONS=211} [2024-06-21 18:44:57,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-21 18:44:57,738 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 211 transitions, 2146 flow [2024-06-21 18:44:57,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:57,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:57,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:57,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:44:57,738 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 18:44:57,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:57,739 INFO L85 PathProgramCache]: Analyzing trace with hash -269969365, now seen corresponding path program 4 times [2024-06-21 18:44:57,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:57,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887337939] [2024-06-21 18:44:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:57,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:44:58,842 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 18:44:58,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:44:58,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887337939] [2024-06-21 18:44:58,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887337939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:44:58,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:44:58,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:44:58,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854107122] [2024-06-21 18:44:58,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:44:58,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:44:58,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:44:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:44:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:44:58,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:44:58,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 211 transitions, 2146 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:58,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:44:58,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:44:58,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:44:59,537 INFO L124 PetriNetUnfolderBase]: 2342/3480 cut-off events. [2024-06-21 18:44:59,538 INFO L125 PetriNetUnfolderBase]: For 62033/62033 co-relation queries the response was YES. [2024-06-21 18:44:59,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20064 conditions, 3480 events. 2342/3480 cut-off events. For 62033/62033 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16308 event pairs, 1031 based on Foata normal form. 5/3484 useless extension candidates. Maximal degree in co-relation 20004. Up to 3327 conditions per place. [2024-06-21 18:44:59,560 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 205 selfloop transitions, 39 changer transitions 0/247 dead transitions. [2024-06-21 18:44:59,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 247 transitions, 2994 flow [2024-06-21 18:44:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:44:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:44:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 18:44:59,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 18:44:59,562 INFO L175 Difference]: Start difference. First operand has 127 places, 211 transitions, 2146 flow. Second operand 7 states and 127 transitions. [2024-06-21 18:44:59,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 247 transitions, 2994 flow [2024-06-21 18:44:59,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 247 transitions, 2859 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 18:44:59,613 INFO L231 Difference]: Finished difference. Result has 128 places, 225 transitions, 2289 flow [2024-06-21 18:44:59,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2289, PETRI_PLACES=128, PETRI_TRANSITIONS=225} [2024-06-21 18:44:59,613 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-21 18:44:59,614 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 225 transitions, 2289 flow [2024-06-21 18:44:59,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:44:59,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:44:59,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:44:59,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:44:59,614 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 18:44:59,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:44:59,615 INFO L85 PathProgramCache]: Analyzing trace with hash -269723287, now seen corresponding path program 1 times [2024-06-21 18:44:59,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:44:59,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30516928] [2024-06-21 18:44:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:44:59,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:44:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:01,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:01,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30516928] [2024-06-21 18:45:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30516928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:01,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728094195] [2024-06-21 18:45:01,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:01,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:01,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:01,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:01,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:01,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 225 transitions, 2289 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:01,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:01,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:01,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:02,279 INFO L124 PetriNetUnfolderBase]: 2345/3485 cut-off events. [2024-06-21 18:45:02,280 INFO L125 PetriNetUnfolderBase]: For 68331/68331 co-relation queries the response was YES. [2024-06-21 18:45:02,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20543 conditions, 3485 events. 2345/3485 cut-off events. For 68331/68331 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16342 event pairs, 1010 based on Foata normal form. 6/3490 useless extension candidates. Maximal degree in co-relation 20482. Up to 3360 conditions per place. [2024-06-21 18:45:02,302 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 27 changer transitions 0/249 dead transitions. [2024-06-21 18:45:02,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 249 transitions, 2991 flow [2024-06-21 18:45:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 18:45:02,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 18:45:02,304 INFO L175 Difference]: Start difference. First operand has 128 places, 225 transitions, 2289 flow. Second operand 8 states and 135 transitions. [2024-06-21 18:45:02,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 249 transitions, 2991 flow [2024-06-21 18:45:02,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 249 transitions, 2929 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 18:45:02,353 INFO L231 Difference]: Finished difference. Result has 133 places, 228 transitions, 2337 flow [2024-06-21 18:45:02,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2337, PETRI_PLACES=133, PETRI_TRANSITIONS=228} [2024-06-21 18:45:02,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-21 18:45:02,354 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 228 transitions, 2337 flow [2024-06-21 18:45:02,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:02,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:02,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:02,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:45:02,355 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:45:02,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:02,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1426632991, now seen corresponding path program 1 times [2024-06-21 18:45:02,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:02,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237393784] [2024-06-21 18:45:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:02,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:03,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237393784] [2024-06-21 18:45:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237393784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:03,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:03,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:45:03,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892993887] [2024-06-21 18:45:03,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:03,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:45:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:03,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:45:03,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:45:03,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:45:03,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 228 transitions, 2337 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:03,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:03,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:45:03,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:04,236 INFO L124 PetriNetUnfolderBase]: 2202/3329 cut-off events. [2024-06-21 18:45:04,237 INFO L125 PetriNetUnfolderBase]: For 71991/72010 co-relation queries the response was YES. [2024-06-21 18:45:04,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20067 conditions, 3329 events. 2202/3329 cut-off events. For 71991/72010 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16052 event pairs, 1022 based on Foata normal form. 9/3329 useless extension candidates. Maximal degree in co-relation 20004. Up to 3133 conditions per place. [2024-06-21 18:45:04,257 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 191 selfloop transitions, 10 changer transitions 0/235 dead transitions. [2024-06-21 18:45:04,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 235 transitions, 2767 flow [2024-06-21 18:45:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:45:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:45:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-21 18:45:04,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-21 18:45:04,259 INFO L175 Difference]: Start difference. First operand has 133 places, 228 transitions, 2337 flow. Second operand 5 states and 88 transitions. [2024-06-21 18:45:04,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 235 transitions, 2767 flow [2024-06-21 18:45:04,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 235 transitions, 2663 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 18:45:04,308 INFO L231 Difference]: Finished difference. Result has 132 places, 228 transitions, 2259 flow [2024-06-21 18:45:04,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2259, PETRI_PLACES=132, PETRI_TRANSITIONS=228} [2024-06-21 18:45:04,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 18:45:04,309 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 228 transitions, 2259 flow [2024-06-21 18:45:04,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:04,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:04,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:04,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:45:04,310 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 18:45:04,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1894223896, now seen corresponding path program 1 times [2024-06-21 18:45:04,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:04,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102911936] [2024-06-21 18:45:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:05,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:05,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102911936] [2024-06-21 18:45:05,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102911936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:05,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:05,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:45:05,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224176364] [2024-06-21 18:45:05,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:05,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:45:05,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:45:05,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:45:05,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:45:05,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 228 transitions, 2259 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:05,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:05,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:45:05,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:06,606 INFO L124 PetriNetUnfolderBase]: 2295/3451 cut-off events. [2024-06-21 18:45:06,606 INFO L125 PetriNetUnfolderBase]: For 83659/83706 co-relation queries the response was YES. [2024-06-21 18:45:06,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21151 conditions, 3451 events. 2295/3451 cut-off events. For 83659/83706 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16608 event pairs, 829 based on Foata normal form. 13/3424 useless extension candidates. Maximal degree in co-relation 21088. Up to 3070 conditions per place. [2024-06-21 18:45:06,631 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 173 selfloop transitions, 75 changer transitions 0/277 dead transitions. [2024-06-21 18:45:06,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 277 transitions, 3199 flow [2024-06-21 18:45:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:45:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:45:06,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 18:45:06,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-21 18:45:06,633 INFO L175 Difference]: Start difference. First operand has 132 places, 228 transitions, 2259 flow. Second operand 10 states and 184 transitions. [2024-06-21 18:45:06,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 277 transitions, 3199 flow [2024-06-21 18:45:06,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 277 transitions, 3173 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 18:45:06,681 INFO L231 Difference]: Finished difference. Result has 140 places, 243 transitions, 2647 flow [2024-06-21 18:45:06,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2647, PETRI_PLACES=140, PETRI_TRANSITIONS=243} [2024-06-21 18:45:06,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 18:45:06,682 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 243 transitions, 2647 flow [2024-06-21 18:45:06,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:06,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:06,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:06,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:45:06,682 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 18:45:06,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash 319240670, now seen corresponding path program 2 times [2024-06-21 18:45:06,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:06,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951403502] [2024-06-21 18:45:06,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:06,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:08,134 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 18:45:08,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:08,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951403502] [2024-06-21 18:45:08,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951403502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:08,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:08,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:08,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197434970] [2024-06-21 18:45:08,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:08,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:08,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:08,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:08,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:08,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:45:08,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 243 transitions, 2647 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:08,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:08,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:45:08,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:08,921 INFO L124 PetriNetUnfolderBase]: 2313/3478 cut-off events. [2024-06-21 18:45:08,921 INFO L125 PetriNetUnfolderBase]: For 93718/93765 co-relation queries the response was YES. [2024-06-21 18:45:08,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22383 conditions, 3478 events. 2313/3478 cut-off events. For 93718/93765 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16827 event pairs, 829 based on Foata normal form. 14/3452 useless extension candidates. Maximal degree in co-relation 22317. Up to 3090 conditions per place. [2024-06-21 18:45:08,947 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 79 changer transitions 0/284 dead transitions. [2024-06-21 18:45:08,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 284 transitions, 3541 flow [2024-06-21 18:45:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 18:45:08,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-21 18:45:08,949 INFO L175 Difference]: Start difference. First operand has 140 places, 243 transitions, 2647 flow. Second operand 8 states and 166 transitions. [2024-06-21 18:45:08,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 284 transitions, 3541 flow [2024-06-21 18:45:09,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 284 transitions, 3394 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 18:45:09,025 INFO L231 Difference]: Finished difference. Result has 144 places, 249 transitions, 2794 flow [2024-06-21 18:45:09,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2794, PETRI_PLACES=144, PETRI_TRANSITIONS=249} [2024-06-21 18:45:09,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-21 18:45:09,026 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 249 transitions, 2794 flow [2024-06-21 18:45:09,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:09,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:09,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:09,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:45:09,027 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:45:09,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash -150044941, now seen corresponding path program 1 times [2024-06-21 18:45:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:09,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122748800] [2024-06-21 18:45:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:10,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:10,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122748800] [2024-06-21 18:45:10,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122748800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:10,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:10,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:10,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243015413] [2024-06-21 18:45:10,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:10,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:10,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:10,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:10,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:10,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:10,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 249 transitions, 2794 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:10,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:10,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:10,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:11,561 INFO L124 PetriNetUnfolderBase]: 2509/3720 cut-off events. [2024-06-21 18:45:11,561 INFO L125 PetriNetUnfolderBase]: For 90786/90789 co-relation queries the response was YES. [2024-06-21 18:45:11,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23831 conditions, 3720 events. 2509/3720 cut-off events. For 90786/90789 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17532 event pairs, 890 based on Foata normal form. 5/3724 useless extension candidates. Maximal degree in co-relation 23765. Up to 3431 conditions per place. [2024-06-21 18:45:11,588 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 239 selfloop transitions, 74 changer transitions 0/316 dead transitions. [2024-06-21 18:45:11,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 316 transitions, 4208 flow [2024-06-21 18:45:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:45:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:45:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 18:45:11,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434589800443459 [2024-06-21 18:45:11,590 INFO L175 Difference]: Start difference. First operand has 144 places, 249 transitions, 2794 flow. Second operand 11 states and 200 transitions. [2024-06-21 18:45:11,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 316 transitions, 4208 flow [2024-06-21 18:45:11,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 316 transitions, 4016 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 18:45:11,680 INFO L231 Difference]: Finished difference. Result has 152 places, 270 transitions, 3012 flow [2024-06-21 18:45:11,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3012, PETRI_PLACES=152, PETRI_TRANSITIONS=270} [2024-06-21 18:45:11,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 18:45:11,680 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 270 transitions, 3012 flow [2024-06-21 18:45:11,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:11,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:11,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:11,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:45:11,681 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 18:45:11,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:11,681 INFO L85 PathProgramCache]: Analyzing trace with hash -150049746, now seen corresponding path program 3 times [2024-06-21 18:45:11,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:11,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380541299] [2024-06-21 18:45:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:11,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:13,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:13,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380541299] [2024-06-21 18:45:13,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380541299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:13,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:13,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:13,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683963001] [2024-06-21 18:45:13,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:13,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:13,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:13,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:13,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:45:13,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 270 transitions, 3012 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:13,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:13,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:45:13,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:14,008 INFO L124 PetriNetUnfolderBase]: 2419/3620 cut-off events. [2024-06-21 18:45:14,009 INFO L125 PetriNetUnfolderBase]: For 103196/103240 co-relation queries the response was YES. [2024-06-21 18:45:14,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24371 conditions, 3620 events. 2419/3620 cut-off events. For 103196/103240 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17426 event pairs, 828 based on Foata normal form. 10/3590 useless extension candidates. Maximal degree in co-relation 24301. Up to 3266 conditions per place. [2024-06-21 18:45:14,037 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 197 selfloop transitions, 64 changer transitions 0/296 dead transitions. [2024-06-21 18:45:14,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 296 transitions, 3673 flow [2024-06-21 18:45:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:45:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:45:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 18:45:14,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-21 18:45:14,039 INFO L175 Difference]: Start difference. First operand has 152 places, 270 transitions, 3012 flow. Second operand 7 states and 143 transitions. [2024-06-21 18:45:14,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 296 transitions, 3673 flow [2024-06-21 18:45:14,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 296 transitions, 3488 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-06-21 18:45:14,158 INFO L231 Difference]: Finished difference. Result has 156 places, 270 transitions, 2973 flow [2024-06-21 18:45:14,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2827, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2973, PETRI_PLACES=156, PETRI_TRANSITIONS=270} [2024-06-21 18:45:14,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-21 18:45:14,158 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 270 transitions, 2973 flow [2024-06-21 18:45:14,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:14,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:14,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:14,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:45:14,159 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 18:45:14,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:14,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1489727623, now seen corresponding path program 2 times [2024-06-21 18:45:14,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:14,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065277962] [2024-06-21 18:45:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:14,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:15,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:15,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065277962] [2024-06-21 18:45:15,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065277962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:15,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:15,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:15,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975395219] [2024-06-21 18:45:15,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:15,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:15,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:15,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:16,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:16,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 270 transitions, 2973 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:16,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:16,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:16,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:16,979 INFO L124 PetriNetUnfolderBase]: 2611/3860 cut-off events. [2024-06-21 18:45:16,980 INFO L125 PetriNetUnfolderBase]: For 108135/108144 co-relation queries the response was YES. [2024-06-21 18:45:16,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25850 conditions, 3860 events. 2611/3860 cut-off events. For 108135/108144 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18279 event pairs, 853 based on Foata normal form. 11/3870 useless extension candidates. Maximal degree in co-relation 25780. Up to 3624 conditions per place. [2024-06-21 18:45:17,011 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 246 selfloop transitions, 80 changer transitions 0/329 dead transitions. [2024-06-21 18:45:17,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 329 transitions, 4178 flow [2024-06-21 18:45:17,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 18:45:17,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 18:45:17,013 INFO L175 Difference]: Start difference. First operand has 156 places, 270 transitions, 2973 flow. Second operand 9 states and 165 transitions. [2024-06-21 18:45:17,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 329 transitions, 4178 flow [2024-06-21 18:45:17,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 329 transitions, 4037 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 18:45:17,121 INFO L231 Difference]: Finished difference. Result has 160 places, 298 transitions, 3309 flow [2024-06-21 18:45:17,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3309, PETRI_PLACES=160, PETRI_TRANSITIONS=298} [2024-06-21 18:45:17,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-21 18:45:17,122 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 298 transitions, 3309 flow [2024-06-21 18:45:17,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:17,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:17,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:17,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:45:17,122 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 18:45:17,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1693289606, now seen corresponding path program 1 times [2024-06-21 18:45:17,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:17,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265356818] [2024-06-21 18:45:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:17,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:18,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:18,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265356818] [2024-06-21 18:45:18,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265356818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:18,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:18,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:18,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936818551] [2024-06-21 18:45:18,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:18,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:18,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:18,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:18,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:18,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:18,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 298 transitions, 3309 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:18,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:18,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:18,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:19,852 INFO L124 PetriNetUnfolderBase]: 2699/3991 cut-off events. [2024-06-21 18:45:19,853 INFO L125 PetriNetUnfolderBase]: For 119940/119946 co-relation queries the response was YES. [2024-06-21 18:45:19,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27388 conditions, 3991 events. 2699/3991 cut-off events. For 119940/119946 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 19099 event pairs, 921 based on Foata normal form. 7/3995 useless extension candidates. Maximal degree in co-relation 27315. Up to 3566 conditions per place. [2024-06-21 18:45:19,888 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 253 selfloop transitions, 102 changer transitions 0/358 dead transitions. [2024-06-21 18:45:19,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 358 transitions, 4730 flow [2024-06-21 18:45:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:45:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:45:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-21 18:45:19,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-21 18:45:19,890 INFO L175 Difference]: Start difference. First operand has 160 places, 298 transitions, 3309 flow. Second operand 7 states and 149 transitions. [2024-06-21 18:45:19,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 358 transitions, 4730 flow [2024-06-21 18:45:20,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 358 transitions, 4669 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 18:45:20,008 INFO L231 Difference]: Finished difference. Result has 166 places, 322 transitions, 3735 flow [2024-06-21 18:45:20,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3248, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3735, PETRI_PLACES=166, PETRI_TRANSITIONS=322} [2024-06-21 18:45:20,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-21 18:45:20,009 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 322 transitions, 3735 flow [2024-06-21 18:45:20,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:20,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:20,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:20,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:45:20,010 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 18:45:20,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:20,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1693289823, now seen corresponding path program 3 times [2024-06-21 18:45:20,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:20,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027085460] [2024-06-21 18:45:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:20,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:21,994 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 18:45:21,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:21,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027085460] [2024-06-21 18:45:21,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027085460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:21,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:21,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:21,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862774541] [2024-06-21 18:45:21,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:21,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:21,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:21,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:21,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:22,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:22,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 322 transitions, 3735 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:22,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:22,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:22,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:23,291 INFO L124 PetriNetUnfolderBase]: 2783/4108 cut-off events. [2024-06-21 18:45:23,291 INFO L125 PetriNetUnfolderBase]: For 135016/135025 co-relation queries the response was YES. [2024-06-21 18:45:23,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29611 conditions, 4108 events. 2783/4108 cut-off events. For 135016/135025 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19714 event pairs, 846 based on Foata normal form. 9/4114 useless extension candidates. Maximal degree in co-relation 29536. Up to 3331 conditions per place. [2024-06-21 18:45:23,320 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 224 selfloop transitions, 160 changer transitions 0/387 dead transitions. [2024-06-21 18:45:23,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 387 transitions, 5478 flow [2024-06-21 18:45:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:45:23,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-21 18:45:23,321 INFO L175 Difference]: Start difference. First operand has 166 places, 322 transitions, 3735 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:45:23,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 387 transitions, 5478 flow [2024-06-21 18:45:23,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 387 transitions, 5348 flow, removed 59 selfloop flow, removed 1 redundant places. [2024-06-21 18:45:23,423 INFO L231 Difference]: Finished difference. Result has 177 places, 342 transitions, 4390 flow [2024-06-21 18:45:23,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4390, PETRI_PLACES=177, PETRI_TRANSITIONS=342} [2024-06-21 18:45:23,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 18:45:23,424 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 342 transitions, 4390 flow [2024-06-21 18:45:23,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:23,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:23,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:23,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:45:23,425 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 18:45:23,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1693295558, now seen corresponding path program 4 times [2024-06-21 18:45:23,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:23,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854899925] [2024-06-21 18:45:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:23,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:24,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:24,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854899925] [2024-06-21 18:45:24,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854899925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:24,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:24,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:24,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403514416] [2024-06-21 18:45:24,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:24,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:24,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:24,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:25,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:45:25,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 342 transitions, 4390 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:25,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:25,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:45:25,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:25,892 INFO L124 PetriNetUnfolderBase]: 2695/4018 cut-off events. [2024-06-21 18:45:25,892 INFO L125 PetriNetUnfolderBase]: For 140147/140199 co-relation queries the response was YES. [2024-06-21 18:45:25,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30399 conditions, 4018 events. 2695/4018 cut-off events. For 140147/140199 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19673 event pairs, 780 based on Foata normal form. 18/4004 useless extension candidates. Maximal degree in co-relation 30318. Up to 3523 conditions per place. [2024-06-21 18:45:25,938 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 223 selfloop transitions, 93 changer transitions 0/371 dead transitions. [2024-06-21 18:45:25,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 371 transitions, 5276 flow [2024-06-21 18:45:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:45:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:45:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 18:45:25,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-21 18:45:25,940 INFO L175 Difference]: Start difference. First operand has 177 places, 342 transitions, 4390 flow. Second operand 7 states and 144 transitions. [2024-06-21 18:45:25,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 371 transitions, 5276 flow [2024-06-21 18:45:26,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 371 transitions, 5182 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-21 18:45:26,103 INFO L231 Difference]: Finished difference. Result has 182 places, 345 transitions, 4567 flow [2024-06-21 18:45:26,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4567, PETRI_PLACES=182, PETRI_TRANSITIONS=345} [2024-06-21 18:45:26,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-21 18:45:26,104 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 345 transitions, 4567 flow [2024-06-21 18:45:26,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:26,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:26,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:26,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:45:26,105 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:45:26,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:26,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1186949137, now seen corresponding path program 4 times [2024-06-21 18:45:26,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:26,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813386696] [2024-06-21 18:45:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:26,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:27,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:27,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813386696] [2024-06-21 18:45:27,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813386696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:27,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:27,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:27,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939910463] [2024-06-21 18:45:27,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:27,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:27,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:27,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:27,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:27,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 345 transitions, 4567 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:27,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:27,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:27,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:29,114 INFO L124 PetriNetUnfolderBase]: 2788/4116 cut-off events. [2024-06-21 18:45:29,114 INFO L125 PetriNetUnfolderBase]: For 147550/147559 co-relation queries the response was YES. [2024-06-21 18:45:29,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31520 conditions, 4116 events. 2788/4116 cut-off events. For 147550/147559 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19741 event pairs, 848 based on Foata normal form. 9/4122 useless extension candidates. Maximal degree in co-relation 31438. Up to 3343 conditions per place. [2024-06-21 18:45:29,152 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 241 selfloop transitions, 145 changer transitions 0/389 dead transitions. [2024-06-21 18:45:29,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 389 transitions, 6013 flow [2024-06-21 18:45:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:45:29,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:45:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:45:29,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 18:45:29,153 INFO L175 Difference]: Start difference. First operand has 182 places, 345 transitions, 4567 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:45:29,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 389 transitions, 6013 flow [2024-06-21 18:45:29,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 389 transitions, 5754 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 18:45:29,309 INFO L231 Difference]: Finished difference. Result has 186 places, 345 transitions, 4609 flow [2024-06-21 18:45:29,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4308, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4609, PETRI_PLACES=186, PETRI_TRANSITIONS=345} [2024-06-21 18:45:29,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 18:45:29,310 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 345 transitions, 4609 flow [2024-06-21 18:45:29,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:29,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:29,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:29,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:45:29,310 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 18:45:29,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:29,310 INFO L85 PathProgramCache]: Analyzing trace with hash -831476481, now seen corresponding path program 5 times [2024-06-21 18:45:29,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:29,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365049487] [2024-06-21 18:45:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:29,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:30,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:30,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365049487] [2024-06-21 18:45:30,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365049487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:30,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:30,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:30,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269328078] [2024-06-21 18:45:30,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:30,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:30,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:30,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:30,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:30,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 345 transitions, 4609 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:30,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:30,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:30,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:31,581 INFO L124 PetriNetUnfolderBase]: 2870/4238 cut-off events. [2024-06-21 18:45:31,581 INFO L125 PetriNetUnfolderBase]: For 159745/159745 co-relation queries the response was YES. [2024-06-21 18:45:31,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33085 conditions, 4238 events. 2870/4238 cut-off events. For 159745/159745 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20498 event pairs, 1017 based on Foata normal form. 5/4242 useless extension candidates. Maximal degree in co-relation 33001. Up to 4020 conditions per place. [2024-06-21 18:45:31,620 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 323 selfloop transitions, 72 changer transitions 0/398 dead transitions. [2024-06-21 18:45:31,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 398 transitions, 6102 flow [2024-06-21 18:45:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 18:45:31,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:45:31,622 INFO L175 Difference]: Start difference. First operand has 186 places, 345 transitions, 4609 flow. Second operand 8 states and 144 transitions. [2024-06-21 18:45:31,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 398 transitions, 6102 flow [2024-06-21 18:45:31,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 398 transitions, 5693 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 18:45:31,794 INFO L231 Difference]: Finished difference. Result has 189 places, 375 transitions, 4924 flow [2024-06-21 18:45:31,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4258, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4924, PETRI_PLACES=189, PETRI_TRANSITIONS=375} [2024-06-21 18:45:31,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-21 18:45:31,795 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 375 transitions, 4924 flow [2024-06-21 18:45:31,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:31,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:31,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:45:31,795 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 18:45:31,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash -827751831, now seen corresponding path program 6 times [2024-06-21 18:45:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:31,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898218049] [2024-06-21 18:45:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:31,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:33,136 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 18:45:33,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:33,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898218049] [2024-06-21 18:45:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898218049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:33,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:33,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:33,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734840762] [2024-06-21 18:45:33,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:33,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:33,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:33,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:33,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:33,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:33,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 375 transitions, 4924 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:33,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:33,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:33,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:34,198 INFO L124 PetriNetUnfolderBase]: 3094/4557 cut-off events. [2024-06-21 18:45:34,198 INFO L125 PetriNetUnfolderBase]: For 180754/180757 co-relation queries the response was YES. [2024-06-21 18:45:34,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35825 conditions, 4557 events. 3094/4557 cut-off events. For 180754/180757 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22286 event pairs, 1018 based on Foata normal form. 10/4564 useless extension candidates. Maximal degree in co-relation 35738. Up to 3639 conditions per place. [2024-06-21 18:45:34,236 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 303 selfloop transitions, 154 changer transitions 0/460 dead transitions. [2024-06-21 18:45:34,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 460 transitions, 7034 flow [2024-06-21 18:45:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 18:45:34,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-21 18:45:34,238 INFO L175 Difference]: Start difference. First operand has 189 places, 375 transitions, 4924 flow. Second operand 8 states and 157 transitions. [2024-06-21 18:45:34,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 460 transitions, 7034 flow [2024-06-21 18:45:34,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 460 transitions, 6921 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 18:45:34,405 INFO L231 Difference]: Finished difference. Result has 196 places, 411 transitions, 5731 flow [2024-06-21 18:45:34,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5731, PETRI_PLACES=196, PETRI_TRANSITIONS=411} [2024-06-21 18:45:34,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-21 18:45:34,405 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 411 transitions, 5731 flow [2024-06-21 18:45:34,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:34,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:34,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:34,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:45:34,406 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 18:45:34,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash -827757411, now seen corresponding path program 7 times [2024-06-21 18:45:34,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:34,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112916696] [2024-06-21 18:45:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:34,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:35,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:35,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112916696] [2024-06-21 18:45:35,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112916696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:35,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:35,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:35,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383406686] [2024-06-21 18:45:35,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:35,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:35,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:35,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:35,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:35,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:35,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 411 transitions, 5731 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:35,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:35,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:35,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:36,805 INFO L124 PetriNetUnfolderBase]: 3110/4581 cut-off events. [2024-06-21 18:45:36,805 INFO L125 PetriNetUnfolderBase]: For 196548/196551 co-relation queries the response was YES. [2024-06-21 18:45:36,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37740 conditions, 4581 events. 3110/4581 cut-off events. For 196548/196551 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22425 event pairs, 1033 based on Foata normal form. 10/4588 useless extension candidates. Maximal degree in co-relation 37650. Up to 3664 conditions per place. [2024-06-21 18:45:36,853 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 312 selfloop transitions, 149 changer transitions 0/464 dead transitions. [2024-06-21 18:45:36,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 464 transitions, 7537 flow [2024-06-21 18:45:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 18:45:36,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-21 18:45:36,854 INFO L175 Difference]: Start difference. First operand has 196 places, 411 transitions, 5731 flow. Second operand 8 states and 157 transitions. [2024-06-21 18:45:36,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 464 transitions, 7537 flow [2024-06-21 18:45:37,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 464 transitions, 7409 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-21 18:45:37,113 INFO L231 Difference]: Finished difference. Result has 202 places, 418 transitions, 6047 flow [2024-06-21 18:45:37,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6047, PETRI_PLACES=202, PETRI_TRANSITIONS=418} [2024-06-21 18:45:37,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 18:45:37,114 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 418 transitions, 6047 flow [2024-06-21 18:45:37,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:37,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:37,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:37,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:45:37,114 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:45:37,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1082355014, now seen corresponding path program 2 times [2024-06-21 18:45:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:37,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226379689] [2024-06-21 18:45:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:38,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226379689] [2024-06-21 18:45:38,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226379689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:38,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:38,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:38,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809531739] [2024-06-21 18:45:38,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:38,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:38,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:38,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:38,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:38,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:38,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 418 transitions, 6047 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:38,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:38,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:38,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:39,664 INFO L124 PetriNetUnfolderBase]: 3135/4616 cut-off events. [2024-06-21 18:45:39,664 INFO L125 PetriNetUnfolderBase]: For 206527/206527 co-relation queries the response was YES. [2024-06-21 18:45:39,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38816 conditions, 4616 events. 3135/4616 cut-off events. For 206527/206527 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22578 event pairs, 1059 based on Foata normal form. 4/4619 useless extension candidates. Maximal degree in co-relation 38724. Up to 4492 conditions per place. [2024-06-21 18:45:39,703 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 412 selfloop transitions, 29 changer transitions 0/444 dead transitions. [2024-06-21 18:45:39,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 444 transitions, 7224 flow [2024-06-21 18:45:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:45:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:45:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 18:45:39,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 18:45:39,705 INFO L175 Difference]: Start difference. First operand has 202 places, 418 transitions, 6047 flow. Second operand 7 states and 125 transitions. [2024-06-21 18:45:39,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 444 transitions, 7224 flow [2024-06-21 18:45:39,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 444 transitions, 6978 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 18:45:39,890 INFO L231 Difference]: Finished difference. Result has 205 places, 424 transitions, 5992 flow [2024-06-21 18:45:39,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5992, PETRI_PLACES=205, PETRI_TRANSITIONS=424} [2024-06-21 18:45:39,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 18:45:39,891 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 424 transitions, 5992 flow [2024-06-21 18:45:39,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:39,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:39,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:39,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:45:39,891 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 18:45:39,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:39,891 INFO L85 PathProgramCache]: Analyzing trace with hash 368352413, now seen corresponding path program 8 times [2024-06-21 18:45:39,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:39,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816089815] [2024-06-21 18:45:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:39,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:41,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:41,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816089815] [2024-06-21 18:45:41,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816089815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:41,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:41,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:41,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141485833] [2024-06-21 18:45:41,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:41,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:41,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:41,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:41,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:41,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 424 transitions, 5992 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:41,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:41,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:41,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:42,245 INFO L124 PetriNetUnfolderBase]: 3167/4663 cut-off events. [2024-06-21 18:45:42,245 INFO L125 PetriNetUnfolderBase]: For 216978/216978 co-relation queries the response was YES. [2024-06-21 18:45:42,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39019 conditions, 4663 events. 3167/4663 cut-off events. For 216978/216978 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22907 event pairs, 1051 based on Foata normal form. 5/4667 useless extension candidates. Maximal degree in co-relation 38926. Up to 4393 conditions per place. [2024-06-21 18:45:42,296 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 407 selfloop transitions, 53 changer transitions 0/463 dead transitions. [2024-06-21 18:45:42,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 463 transitions, 7562 flow [2024-06-21 18:45:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 18:45:42,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 18:45:42,297 INFO L175 Difference]: Start difference. First operand has 205 places, 424 transitions, 5992 flow. Second operand 8 states and 145 transitions. [2024-06-21 18:45:42,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 463 transitions, 7562 flow [2024-06-21 18:45:42,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 463 transitions, 7469 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 18:45:42,561 INFO L231 Difference]: Finished difference. Result has 209 places, 434 transitions, 6209 flow [2024-06-21 18:45:42,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5899, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6209, PETRI_PLACES=209, PETRI_TRANSITIONS=434} [2024-06-21 18:45:42,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-21 18:45:42,562 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 434 transitions, 6209 flow [2024-06-21 18:45:42,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:42,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:42,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:42,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:45:42,575 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 18:45:42,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:42,576 INFO L85 PathProgramCache]: Analyzing trace with hash 375709643, now seen corresponding path program 9 times [2024-06-21 18:45:42,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:42,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788032053] [2024-06-21 18:45:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:42,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788032053] [2024-06-21 18:45:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788032053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:43,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:43,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:43,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605253875] [2024-06-21 18:45:43,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:43,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:43,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:43,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:43,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:43,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 434 transitions, 6209 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:43,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:43,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:43,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:44,718 INFO L124 PetriNetUnfolderBase]: 3192/4700 cut-off events. [2024-06-21 18:45:44,718 INFO L125 PetriNetUnfolderBase]: For 230249/230249 co-relation queries the response was YES. [2024-06-21 18:45:44,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40108 conditions, 4700 events. 3192/4700 cut-off events. For 230249/230249 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23088 event pairs, 1060 based on Foata normal form. 4/4703 useless extension candidates. Maximal degree in co-relation 40013. Up to 4574 conditions per place. [2024-06-21 18:45:44,774 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 429 selfloop transitions, 31 changer transitions 0/463 dead transitions. [2024-06-21 18:45:44,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 463 transitions, 7462 flow [2024-06-21 18:45:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:45:44,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:45:44,775 INFO L175 Difference]: Start difference. First operand has 209 places, 434 transitions, 6209 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:45:44,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 463 transitions, 7462 flow [2024-06-21 18:45:45,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 463 transitions, 7282 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-21 18:45:45,054 INFO L231 Difference]: Finished difference. Result has 213 places, 440 transitions, 6237 flow [2024-06-21 18:45:45,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6047, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6237, PETRI_PLACES=213, PETRI_TRANSITIONS=440} [2024-06-21 18:45:45,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-21 18:45:45,055 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 440 transitions, 6237 flow [2024-06-21 18:45:45,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:45,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:45,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:45,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:45:45,055 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 18:45:45,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash 220886002, now seen corresponding path program 3 times [2024-06-21 18:45:45,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:45,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191133224] [2024-06-21 18:45:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:46,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191133224] [2024-06-21 18:45:46,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191133224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:46,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:46,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:46,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817810746] [2024-06-21 18:45:46,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:46,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:46,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:46,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:46,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:46,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:46,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 440 transitions, 6237 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:46,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:46,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:46,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:47,702 INFO L124 PetriNetUnfolderBase]: 3198/4709 cut-off events. [2024-06-21 18:45:47,702 INFO L125 PetriNetUnfolderBase]: For 238950/238950 co-relation queries the response was YES. [2024-06-21 18:45:47,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40258 conditions, 4709 events. 3198/4709 cut-off events. For 238950/238950 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23125 event pairs, 1048 based on Foata normal form. 5/4713 useless extension candidates. Maximal degree in co-relation 40161. Up to 4484 conditions per place. [2024-06-21 18:45:47,763 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 416 selfloop transitions, 51 changer transitions 0/470 dead transitions. [2024-06-21 18:45:47,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 470 transitions, 7590 flow [2024-06-21 18:45:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 18:45:47,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:45:47,764 INFO L175 Difference]: Start difference. First operand has 213 places, 440 transitions, 6237 flow. Second operand 8 states and 136 transitions. [2024-06-21 18:45:47,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 470 transitions, 7590 flow [2024-06-21 18:45:48,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 470 transitions, 7478 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 18:45:48,036 INFO L231 Difference]: Finished difference. Result has 215 places, 447 transitions, 6375 flow [2024-06-21 18:45:48,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6125, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6375, PETRI_PLACES=215, PETRI_TRANSITIONS=447} [2024-06-21 18:45:48,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-21 18:45:48,036 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 447 transitions, 6375 flow [2024-06-21 18:45:48,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:48,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:48,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:48,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:45:48,037 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 18:45:48,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash 220880050, now seen corresponding path program 5 times [2024-06-21 18:45:48,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:48,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100838567] [2024-06-21 18:45:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:48,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:49,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:49,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100838567] [2024-06-21 18:45:49,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100838567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:49,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:49,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:49,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403219441] [2024-06-21 18:45:49,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:49,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:49,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:49,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:49,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:49,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:45:49,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 447 transitions, 6375 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:49,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:49,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:45:49,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:50,748 INFO L124 PetriNetUnfolderBase]: 3100/4603 cut-off events. [2024-06-21 18:45:50,748 INFO L125 PetriNetUnfolderBase]: For 251992/252044 co-relation queries the response was YES. [2024-06-21 18:45:50,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39887 conditions, 4603 events. 3100/4603 cut-off events. For 251992/252044 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23053 event pairs, 978 based on Foata normal form. 13/4576 useless extension candidates. Maximal degree in co-relation 39789. Up to 4177 conditions per place. [2024-06-21 18:45:50,795 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 363 selfloop transitions, 25 changer transitions 0/472 dead transitions. [2024-06-21 18:45:50,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 472 transitions, 7381 flow [2024-06-21 18:45:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:45:50,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:45:50,796 INFO L175 Difference]: Start difference. First operand has 215 places, 447 transitions, 6375 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:45:50,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 472 transitions, 7381 flow [2024-06-21 18:45:51,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 472 transitions, 7212 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 18:45:51,053 INFO L231 Difference]: Finished difference. Result has 217 places, 450 transitions, 6361 flow [2024-06-21 18:45:51,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6206, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6361, PETRI_PLACES=217, PETRI_TRANSITIONS=450} [2024-06-21 18:45:51,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-21 18:45:51,054 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 450 transitions, 6361 flow [2024-06-21 18:45:51,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:51,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:51,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:51,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:45:51,055 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 18:45:51,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 228245092, now seen corresponding path program 4 times [2024-06-21 18:45:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:51,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180751436] [2024-06-21 18:45:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:51,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:52,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:52,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180751436] [2024-06-21 18:45:52,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180751436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:52,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:52,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:52,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986573541] [2024-06-21 18:45:52,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:52,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:52,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:52,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:52,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:52,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 450 transitions, 6361 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:52,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:52,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:52,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:53,402 INFO L124 PetriNetUnfolderBase]: 3195/4705 cut-off events. [2024-06-21 18:45:53,402 INFO L125 PetriNetUnfolderBase]: For 257434/257434 co-relation queries the response was YES. [2024-06-21 18:45:53,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40872 conditions, 4705 events. 3195/4705 cut-off events. For 257434/257434 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23130 event pairs, 1057 based on Foata normal form. 3/4707 useless extension candidates. Maximal degree in co-relation 40774. Up to 4564 conditions per place. [2024-06-21 18:45:53,454 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 437 selfloop transitions, 34 changer transitions 0/474 dead transitions. [2024-06-21 18:45:53,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 474 transitions, 7599 flow [2024-06-21 18:45:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:45:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:45:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 18:45:53,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 18:45:53,456 INFO L175 Difference]: Start difference. First operand has 217 places, 450 transitions, 6361 flow. Second operand 7 states and 127 transitions. [2024-06-21 18:45:53,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 474 transitions, 7599 flow [2024-06-21 18:45:53,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 474 transitions, 7470 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 18:45:53,705 INFO L231 Difference]: Finished difference. Result has 218 places, 454 transitions, 6412 flow [2024-06-21 18:45:53,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6232, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6412, PETRI_PLACES=218, PETRI_TRANSITIONS=454} [2024-06-21 18:45:53,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 18:45:53,706 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 454 transitions, 6412 flow [2024-06-21 18:45:53,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:53,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:53,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:53,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:45:53,706 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 18:45:53,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:53,707 INFO L85 PathProgramCache]: Analyzing trace with hash 220885785, now seen corresponding path program 10 times [2024-06-21 18:45:53,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:53,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698605195] [2024-06-21 18:45:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:53,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:54,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:54,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698605195] [2024-06-21 18:45:54,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698605195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:54,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:54,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:45:54,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437604189] [2024-06-21 18:45:54,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:54,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:45:54,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:54,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:45:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:45:54,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:54,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 454 transitions, 6412 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:54,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:54,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:54,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:56,043 INFO L124 PetriNetUnfolderBase]: 3243/4774 cut-off events. [2024-06-21 18:45:56,044 INFO L125 PetriNetUnfolderBase]: For 274055/274055 co-relation queries the response was YES. [2024-06-21 18:45:56,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42037 conditions, 4774 events. 3243/4774 cut-off events. For 274055/274055 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23506 event pairs, 1048 based on Foata normal form. 8/4781 useless extension candidates. Maximal degree in co-relation 41938. Up to 4332 conditions per place. [2024-06-21 18:45:56,097 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 429 selfloop transitions, 73 changer transitions 0/505 dead transitions. [2024-06-21 18:45:56,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 505 transitions, 8402 flow [2024-06-21 18:45:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:45:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:45:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 18:45:56,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 18:45:56,098 INFO L175 Difference]: Start difference. First operand has 218 places, 454 transitions, 6412 flow. Second operand 8 states and 150 transitions. [2024-06-21 18:45:56,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 505 transitions, 8402 flow [2024-06-21 18:45:56,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 505 transitions, 8286 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 18:45:56,364 INFO L231 Difference]: Finished difference. Result has 222 places, 466 transitions, 6725 flow [2024-06-21 18:45:56,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6296, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6725, PETRI_PLACES=222, PETRI_TRANSITIONS=466} [2024-06-21 18:45:56,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 18:45:56,365 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 466 transitions, 6725 flow [2024-06-21 18:45:56,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:45:56,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:56,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:56,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 18:45:56,366 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:45:56,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1275947971, now seen corresponding path program 1 times [2024-06-21 18:45:56,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:56,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746679843] [2024-06-21 18:45:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:56,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:45:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:45:58,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:45:58,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746679843] [2024-06-21 18:45:58,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746679843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:45:58,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:45:58,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:45:58,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471602230] [2024-06-21 18:45:58,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:45:58,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:45:58,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:45:58,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:45:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:45:58,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:45:58,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 466 transitions, 6725 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 18:45:58,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:45:58,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:45:58,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:45:59,273 INFO L124 PetriNetUnfolderBase]: 3234/4762 cut-off events. [2024-06-21 18:45:59,273 INFO L125 PetriNetUnfolderBase]: For 283546/283546 co-relation queries the response was YES. [2024-06-21 18:45:59,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42615 conditions, 4762 events. 3234/4762 cut-off events. For 283546/283546 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23363 event pairs, 1051 based on Foata normal form. 3/4764 useless extension candidates. Maximal degree in co-relation 42514. Up to 4692 conditions per place. [2024-06-21 18:45:59,318 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 13 changer transitions 0/479 dead transitions. [2024-06-21 18:45:59,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 479 transitions, 7747 flow [2024-06-21 18:45:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:45:59,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:45:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 18:45:59,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-21 18:45:59,320 INFO L175 Difference]: Start difference. First operand has 222 places, 466 transitions, 6725 flow. Second operand 6 states and 98 transitions. [2024-06-21 18:45:59,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 479 transitions, 7747 flow [2024-06-21 18:45:59,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 479 transitions, 7506 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 18:45:59,611 INFO L231 Difference]: Finished difference. Result has 223 places, 469 transitions, 6550 flow [2024-06-21 18:45:59,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6484, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6550, PETRI_PLACES=223, PETRI_TRANSITIONS=469} [2024-06-21 18:45:59,612 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-21 18:45:59,612 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 469 transitions, 6550 flow [2024-06-21 18:45:59,612 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 18:45:59,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:45:59,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:45:59,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 18:45:59,613 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 18:45:59,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:45:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1528755520, now seen corresponding path program 1 times [2024-06-21 18:45:59,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:45:59,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331781097] [2024-06-21 18:45:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:45:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:45:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:00,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:00,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331781097] [2024-06-21 18:46:00,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331781097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:00,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:00,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:46:00,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418081357] [2024-06-21 18:46:00,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:00,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:46:00,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:00,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:46:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:46:00,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 18:46:00,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 469 transitions, 6550 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:00,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:00,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 18:46:00,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:02,163 INFO L124 PetriNetUnfolderBase]: 2831/4398 cut-off events. [2024-06-21 18:46:02,164 INFO L125 PetriNetUnfolderBase]: For 310463/310508 co-relation queries the response was YES. [2024-06-21 18:46:02,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41066 conditions, 4398 events. 2831/4398 cut-off events. For 310463/310508 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23842 event pairs, 510 based on Foata normal form. 15/4370 useless extension candidates. Maximal degree in co-relation 40964. Up to 3346 conditions per place. [2024-06-21 18:46:02,217 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 302 selfloop transitions, 87 changer transitions 0/516 dead transitions. [2024-06-21 18:46:02,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 516 transitions, 8048 flow [2024-06-21 18:46:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 18:46:02,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-21 18:46:02,219 INFO L175 Difference]: Start difference. First operand has 223 places, 469 transitions, 6550 flow. Second operand 10 states and 208 transitions. [2024-06-21 18:46:02,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 516 transitions, 8048 flow [2024-06-21 18:46:02,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 516 transitions, 8000 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 18:46:02,508 INFO L231 Difference]: Finished difference. Result has 231 places, 479 transitions, 7080 flow [2024-06-21 18:46:02,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6502, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7080, PETRI_PLACES=231, PETRI_TRANSITIONS=479} [2024-06-21 18:46:02,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-21 18:46:02,509 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 479 transitions, 7080 flow [2024-06-21 18:46:02,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:02,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:02,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:02,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 18:46:02,512 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:02,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1403190236, now seen corresponding path program 1 times [2024-06-21 18:46:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:02,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199749464] [2024-06-21 18:46:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:02,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:04,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:04,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199749464] [2024-06-21 18:46:04,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199749464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:04,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:04,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:46:04,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282823092] [2024-06-21 18:46:04,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:04,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:46:04,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:04,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:46:04,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:46:04,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:46:04,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 479 transitions, 7080 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 18:46:04,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:04,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:46:04,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:05,814 INFO L124 PetriNetUnfolderBase]: 3512/5165 cut-off events. [2024-06-21 18:46:05,815 INFO L125 PetriNetUnfolderBase]: For 339459/339468 co-relation queries the response was YES. [2024-06-21 18:46:05,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48321 conditions, 5165 events. 3512/5165 cut-off events. For 339459/339468 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25841 event pairs, 781 based on Foata normal form. 9/5173 useless extension candidates. Maximal degree in co-relation 48216. Up to 4276 conditions per place. [2024-06-21 18:46:05,876 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 407 selfloop transitions, 150 changer transitions 0/560 dead transitions. [2024-06-21 18:46:05,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 560 transitions, 9728 flow [2024-06-21 18:46:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:46:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:46:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 18:46:05,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-21 18:46:05,878 INFO L175 Difference]: Start difference. First operand has 231 places, 479 transitions, 7080 flow. Second operand 11 states and 208 transitions. [2024-06-21 18:46:05,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 560 transitions, 9728 flow [2024-06-21 18:46:06,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 560 transitions, 9536 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-21 18:46:06,297 INFO L231 Difference]: Finished difference. Result has 240 places, 508 transitions, 7828 flow [2024-06-21 18:46:06,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6902, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7828, PETRI_PLACES=240, PETRI_TRANSITIONS=508} [2024-06-21 18:46:06,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 18:46:06,298 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 508 transitions, 7828 flow [2024-06-21 18:46:06,298 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 18:46:06,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:06,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:06,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 18:46:06,299 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:06,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:06,299 INFO L85 PathProgramCache]: Analyzing trace with hash -446295010, now seen corresponding path program 2 times [2024-06-21 18:46:06,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:06,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816307807] [2024-06-21 18:46:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:06,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:07,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:07,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816307807] [2024-06-21 18:46:07,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816307807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:07,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:07,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:07,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672442477] [2024-06-21 18:46:07,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:07,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:07,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:08,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:46:08,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 508 transitions, 7828 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:08,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:08,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:46:08,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:09,508 INFO L124 PetriNetUnfolderBase]: 3478/5158 cut-off events. [2024-06-21 18:46:09,508 INFO L125 PetriNetUnfolderBase]: For 364646/364693 co-relation queries the response was YES. [2024-06-21 18:46:09,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49941 conditions, 5158 events. 3478/5158 cut-off events. For 364646/364693 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26458 event pairs, 608 based on Foata normal form. 17/5131 useless extension candidates. Maximal degree in co-relation 49833. Up to 4354 conditions per place. [2024-06-21 18:46:09,562 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 366 selfloop transitions, 93 changer transitions 0/555 dead transitions. [2024-06-21 18:46:09,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 555 transitions, 9365 flow [2024-06-21 18:46:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:46:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:46:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 18:46:09,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-21 18:46:09,563 INFO L175 Difference]: Start difference. First operand has 240 places, 508 transitions, 7828 flow. Second operand 9 states and 184 transitions. [2024-06-21 18:46:09,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 555 transitions, 9365 flow [2024-06-21 18:46:09,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 555 transitions, 9149 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-21 18:46:09,990 INFO L231 Difference]: Finished difference. Result has 246 places, 514 transitions, 8002 flow [2024-06-21 18:46:09,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8002, PETRI_PLACES=246, PETRI_TRANSITIONS=514} [2024-06-21 18:46:09,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-21 18:46:09,990 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 514 transitions, 8002 flow [2024-06-21 18:46:09,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:09,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:09,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:09,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 18:46:09,991 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:09,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:09,992 INFO L85 PathProgramCache]: Analyzing trace with hash -443225886, now seen corresponding path program 2 times [2024-06-21 18:46:09,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:09,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611344513] [2024-06-21 18:46:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:09,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:11,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611344513] [2024-06-21 18:46:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611344513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:11,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:11,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525124664] [2024-06-21 18:46:11,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:11,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:11,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:46:11,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 514 transitions, 8002 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:11,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:11,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:46:11,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:13,178 INFO L124 PetriNetUnfolderBase]: 3662/5392 cut-off events. [2024-06-21 18:46:13,178 INFO L125 PetriNetUnfolderBase]: For 375526/375535 co-relation queries the response was YES. [2024-06-21 18:46:13,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52366 conditions, 5392 events. 3662/5392 cut-off events. For 375526/375535 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 27254 event pairs, 791 based on Foata normal form. 15/5406 useless extension candidates. Maximal degree in co-relation 52257. Up to 4434 conditions per place. [2024-06-21 18:46:13,238 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 155 changer transitions 0/586 dead transitions. [2024-06-21 18:46:13,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 586 transitions, 10560 flow [2024-06-21 18:46:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:46:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:46:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 18:46:13,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-21 18:46:13,243 INFO L175 Difference]: Start difference. First operand has 246 places, 514 transitions, 8002 flow. Second operand 9 states and 194 transitions. [2024-06-21 18:46:13,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 586 transitions, 10560 flow [2024-06-21 18:46:13,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 586 transitions, 10219 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-21 18:46:13,833 INFO L231 Difference]: Finished difference. Result has 252 places, 533 transitions, 8397 flow [2024-06-21 18:46:13,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8397, PETRI_PLACES=252, PETRI_TRANSITIONS=533} [2024-06-21 18:46:13,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-21 18:46:13,834 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 533 transitions, 8397 flow [2024-06-21 18:46:13,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:13,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:13,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:13,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 18:46:13,835 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:13,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash -443229730, now seen corresponding path program 3 times [2024-06-21 18:46:13,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:13,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760334612] [2024-06-21 18:46:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:13,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:15,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:15,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760334612] [2024-06-21 18:46:15,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760334612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:15,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:15,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:15,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442713612] [2024-06-21 18:46:15,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:15,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:15,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:15,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:15,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:15,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:46:15,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 533 transitions, 8397 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:15,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:15,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:46:15,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:17,182 INFO L124 PetriNetUnfolderBase]: 3601/5349 cut-off events. [2024-06-21 18:46:17,183 INFO L125 PetriNetUnfolderBase]: For 395919/395964 co-relation queries the response was YES. [2024-06-21 18:46:17,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52900 conditions, 5349 events. 3601/5349 cut-off events. For 395919/395964 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 27681 event pairs, 798 based on Foata normal form. 17/5332 useless extension candidates. Maximal degree in co-relation 52788. Up to 4629 conditions per place. [2024-06-21 18:46:17,246 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 389 selfloop transitions, 85 changer transitions 0/576 dead transitions. [2024-06-21 18:46:17,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 576 transitions, 9756 flow [2024-06-21 18:46:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:46:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:46:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 18:46:17,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-21 18:46:17,248 INFO L175 Difference]: Start difference. First operand has 252 places, 533 transitions, 8397 flow. Second operand 9 states and 181 transitions. [2024-06-21 18:46:17,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 576 transitions, 9756 flow [2024-06-21 18:46:17,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 576 transitions, 9453 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-21 18:46:17,827 INFO L231 Difference]: Finished difference. Result has 257 places, 537 transitions, 8415 flow [2024-06-21 18:46:17,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8094, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8415, PETRI_PLACES=257, PETRI_TRANSITIONS=537} [2024-06-21 18:46:17,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-21 18:46:17,828 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 537 transitions, 8415 flow [2024-06-21 18:46:17,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:17,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:17,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:17,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 18:46:17,828 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:17,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash -356424150, now seen corresponding path program 1 times [2024-06-21 18:46:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:17,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127404630] [2024-06-21 18:46:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:19,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127404630] [2024-06-21 18:46:19,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127404630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:19,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:19,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:19,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143717911] [2024-06-21 18:46:19,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:19,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:19,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:19,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:19,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:19,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:46:19,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 537 transitions, 8415 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:19,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:19,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:46:19,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:20,973 INFO L124 PetriNetUnfolderBase]: 3797/5589 cut-off events. [2024-06-21 18:46:20,974 INFO L125 PetriNetUnfolderBase]: For 414177/414180 co-relation queries the response was YES. [2024-06-21 18:46:21,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55206 conditions, 5589 events. 3797/5589 cut-off events. For 414177/414180 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28535 event pairs, 880 based on Foata normal form. 8/5596 useless extension candidates. Maximal degree in co-relation 55093. Up to 5038 conditions per place. [2024-06-21 18:46:21,046 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 457 selfloop transitions, 156 changer transitions 0/616 dead transitions. [2024-06-21 18:46:21,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 616 transitions, 11245 flow [2024-06-21 18:46:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:46:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:46:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 18:46:21,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-21 18:46:21,047 INFO L175 Difference]: Start difference. First operand has 257 places, 537 transitions, 8415 flow. Second operand 10 states and 196 transitions. [2024-06-21 18:46:21,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 616 transitions, 11245 flow [2024-06-21 18:46:21,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 616 transitions, 10976 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:21,660 INFO L231 Difference]: Finished difference. Result has 261 places, 566 transitions, 9052 flow [2024-06-21 18:46:21,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8146, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9052, PETRI_PLACES=261, PETRI_TRANSITIONS=566} [2024-06-21 18:46:21,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 18:46:21,660 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 566 transitions, 9052 flow [2024-06-21 18:46:21,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:21,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:21,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:21,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 18:46:21,661 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:21,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:21,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1839524864, now seen corresponding path program 3 times [2024-06-21 18:46:21,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:21,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022517040] [2024-06-21 18:46:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:21,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:23,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022517040] [2024-06-21 18:46:23,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022517040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:23,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:23,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:23,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312098851] [2024-06-21 18:46:23,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:23,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:23,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:23,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:23,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:23,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:46:23,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 566 transitions, 9052 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:23,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:23,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:46:23,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:25,065 INFO L124 PetriNetUnfolderBase]: 3866/5689 cut-off events. [2024-06-21 18:46:25,066 INFO L125 PetriNetUnfolderBase]: For 439795/439798 co-relation queries the response was YES. [2024-06-21 18:46:25,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56994 conditions, 5689 events. 3866/5689 cut-off events. For 439795/439798 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29134 event pairs, 868 based on Foata normal form. 10/5698 useless extension candidates. Maximal degree in co-relation 56879. Up to 4995 conditions per place. [2024-06-21 18:46:25,129 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 441 selfloop transitions, 175 changer transitions 0/619 dead transitions. [2024-06-21 18:46:25,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 619 transitions, 11311 flow [2024-06-21 18:46:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:46:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:46:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 18:46:25,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 18:46:25,131 INFO L175 Difference]: Start difference. First operand has 261 places, 566 transitions, 9052 flow. Second operand 8 states and 168 transitions. [2024-06-21 18:46:25,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 619 transitions, 11311 flow [2024-06-21 18:46:25,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 619 transitions, 10905 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 18:46:25,720 INFO L231 Difference]: Finished difference. Result has 263 places, 581 transitions, 9372 flow [2024-06-21 18:46:25,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8664, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9372, PETRI_PLACES=263, PETRI_TRANSITIONS=581} [2024-06-21 18:46:25,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 18:46:25,721 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 581 transitions, 9372 flow [2024-06-21 18:46:25,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:25,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:25,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:25,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 18:46:25,721 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 18:46:25,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:25,722 INFO L85 PathProgramCache]: Analyzing trace with hash -356573136, now seen corresponding path program 4 times [2024-06-21 18:46:25,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:25,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275335975] [2024-06-21 18:46:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:25,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:27,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:27,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275335975] [2024-06-21 18:46:27,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275335975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:27,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:27,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:27,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371531031] [2024-06-21 18:46:27,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:27,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:27,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:27,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:27,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:27,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:46:27,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 581 transitions, 9372 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:27,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:27,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:46:27,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:29,044 INFO L124 PetriNetUnfolderBase]: 3871/5698 cut-off events. [2024-06-21 18:46:29,045 INFO L125 PetriNetUnfolderBase]: For 449381/449384 co-relation queries the response was YES. [2024-06-21 18:46:29,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57175 conditions, 5698 events. 3871/5698 cut-off events. For 449381/449384 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29166 event pairs, 866 based on Foata normal form. 11/5708 useless extension candidates. Maximal degree in co-relation 57059. Up to 4810 conditions per place. [2024-06-21 18:46:29,124 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 459 selfloop transitions, 168 changer transitions 0/630 dead transitions. [2024-06-21 18:46:29,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 630 transitions, 11546 flow [2024-06-21 18:46:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:46:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:46:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 18:46:29,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-21 18:46:29,125 INFO L175 Difference]: Start difference. First operand has 263 places, 581 transitions, 9372 flow. Second operand 8 states and 169 transitions. [2024-06-21 18:46:29,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 630 transitions, 11546 flow [2024-06-21 18:46:29,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 630 transitions, 11374 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-21 18:46:29,817 INFO L231 Difference]: Finished difference. Result has 269 places, 589 transitions, 9803 flow [2024-06-21 18:46:29,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9200, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9803, PETRI_PLACES=269, PETRI_TRANSITIONS=589} [2024-06-21 18:46:29,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-21 18:46:29,818 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 589 transitions, 9803 flow [2024-06-21 18:46:29,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:29,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:29,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:29,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 18:46:29,819 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:29,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash -356537920, now seen corresponding path program 4 times [2024-06-21 18:46:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399600836] [2024-06-21 18:46:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:29,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:31,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:31,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399600836] [2024-06-21 18:46:31,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399600836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:31,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:31,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:31,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589411735] [2024-06-21 18:46:31,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:31,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:31,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:31,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:31,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:31,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:46:31,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 589 transitions, 9803 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:31,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:31,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:46:31,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:33,149 INFO L124 PetriNetUnfolderBase]: 3766/5587 cut-off events. [2024-06-21 18:46:33,149 INFO L125 PetriNetUnfolderBase]: For 463513/463551 co-relation queries the response was YES. [2024-06-21 18:46:33,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56731 conditions, 5587 events. 3766/5587 cut-off events. For 463513/463551 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29055 event pairs, 841 based on Foata normal form. 13/5569 useless extension candidates. Maximal degree in co-relation 56612. Up to 4897 conditions per place. [2024-06-21 18:46:33,221 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 437 selfloop transitions, 68 changer transitions 0/620 dead transitions. [2024-06-21 18:46:33,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 620 transitions, 11008 flow [2024-06-21 18:46:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:46:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:46:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 18:46:33,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 18:46:33,240 INFO L175 Difference]: Start difference. First operand has 269 places, 589 transitions, 9803 flow. Second operand 8 states and 160 transitions. [2024-06-21 18:46:33,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 620 transitions, 11008 flow [2024-06-21 18:46:34,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 620 transitions, 10501 flow, removed 120 selfloop flow, removed 5 redundant places. [2024-06-21 18:46:34,127 INFO L231 Difference]: Finished difference. Result has 272 places, 589 transitions, 9442 flow [2024-06-21 18:46:34,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9296, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9442, PETRI_PLACES=272, PETRI_TRANSITIONS=589} [2024-06-21 18:46:34,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 18:46:34,128 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 589 transitions, 9442 flow [2024-06-21 18:46:34,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:34,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:34,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:34,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 18:46:34,129 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:34,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:34,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1063082218, now seen corresponding path program 2 times [2024-06-21 18:46:34,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:34,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723376434] [2024-06-21 18:46:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:34,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:35,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:35,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723376434] [2024-06-21 18:46:35,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723376434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:35,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:35,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:35,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554626576] [2024-06-21 18:46:35,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:35,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:36,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:46:36,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 589 transitions, 9442 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:36,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:36,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:46:36,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:37,741 INFO L124 PetriNetUnfolderBase]: 3889/5717 cut-off events. [2024-06-21 18:46:37,741 INFO L125 PetriNetUnfolderBase]: For 458454/458463 co-relation queries the response was YES. [2024-06-21 18:46:37,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57175 conditions, 5717 events. 3889/5717 cut-off events. For 458454/458463 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29207 event pairs, 792 based on Foata normal form. 14/5730 useless extension candidates. Maximal degree in co-relation 57055. Up to 5365 conditions per place. [2024-06-21 18:46:37,814 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 514 selfloop transitions, 117 changer transitions 0/634 dead transitions. [2024-06-21 18:46:37,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 634 transitions, 11501 flow [2024-06-21 18:46:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:46:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:46:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 18:46:37,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4847560975609756 [2024-06-21 18:46:37,816 INFO L175 Difference]: Start difference. First operand has 272 places, 589 transitions, 9442 flow. Second operand 8 states and 159 transitions. [2024-06-21 18:46:37,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 634 transitions, 11501 flow [2024-06-21 18:46:38,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 634 transitions, 11342 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:38,642 INFO L231 Difference]: Finished difference. Result has 274 places, 603 transitions, 9906 flow [2024-06-21 18:46:38,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9283, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9906, PETRI_PLACES=274, PETRI_TRANSITIONS=603} [2024-06-21 18:46:38,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-21 18:46:38,643 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 603 transitions, 9906 flow [2024-06-21 18:46:38,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:38,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:38,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:38,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 18:46:38,644 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:38,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -947611310, now seen corresponding path program 1 times [2024-06-21 18:46:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:38,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437100328] [2024-06-21 18:46:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:38,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:40,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:40,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437100328] [2024-06-21 18:46:40,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437100328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:40,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:40,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:46:40,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860275913] [2024-06-21 18:46:40,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:40,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:46:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:46:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:46:40,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:46:40,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 603 transitions, 9906 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:40,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:40,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:46:40,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:42,205 INFO L124 PetriNetUnfolderBase]: 3917/5765 cut-off events. [2024-06-21 18:46:42,206 INFO L125 PetriNetUnfolderBase]: For 479615/479621 co-relation queries the response was YES. [2024-06-21 18:46:42,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58375 conditions, 5765 events. 3917/5765 cut-off events. For 479615/479621 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 29631 event pairs, 931 based on Foata normal form. 10/5772 useless extension candidates. Maximal degree in co-relation 58253. Up to 5280 conditions per place. [2024-06-21 18:46:42,286 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 526 selfloop transitions, 117 changer transitions 0/646 dead transitions. [2024-06-21 18:46:42,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 646 transitions, 11958 flow [2024-06-21 18:46:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:46:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:46:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 18:46:42,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 18:46:42,294 INFO L175 Difference]: Start difference. First operand has 274 places, 603 transitions, 9906 flow. Second operand 9 states and 172 transitions. [2024-06-21 18:46:42,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 646 transitions, 11958 flow [2024-06-21 18:46:43,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 646 transitions, 11709 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 18:46:43,175 INFO L231 Difference]: Finished difference. Result has 278 places, 606 transitions, 10010 flow [2024-06-21 18:46:43,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9657, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10010, PETRI_PLACES=278, PETRI_TRANSITIONS=606} [2024-06-21 18:46:43,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-21 18:46:43,176 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 606 transitions, 10010 flow [2024-06-21 18:46:43,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:43,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:43,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:43,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 18:46:43,176 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:43,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:43,177 INFO L85 PathProgramCache]: Analyzing trace with hash -952368726, now seen corresponding path program 3 times [2024-06-21 18:46:43,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:43,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293864718] [2024-06-21 18:46:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:43,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:44,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:44,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293864718] [2024-06-21 18:46:44,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293864718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:44,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:44,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:46:44,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584459115] [2024-06-21 18:46:44,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:44,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:46:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:44,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:46:44,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:46:45,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:46:45,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 606 transitions, 10010 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 18:46:45,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:45,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:46:45,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:46,838 INFO L124 PetriNetUnfolderBase]: 4089/6015 cut-off events. [2024-06-21 18:46:46,838 INFO L125 PetriNetUnfolderBase]: For 508193/508202 co-relation queries the response was YES. [2024-06-21 18:46:46,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61165 conditions, 6015 events. 4089/6015 cut-off events. For 508193/508202 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31172 event pairs, 803 based on Foata normal form. 9/6021 useless extension candidates. Maximal degree in co-relation 61041. Up to 4517 conditions per place. [2024-06-21 18:46:46,915 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 352 selfloop transitions, 349 changer transitions 0/704 dead transitions. [2024-06-21 18:46:46,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 704 transitions, 13382 flow [2024-06-21 18:46:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:46:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:46:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 18:46:46,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 18:46:46,917 INFO L175 Difference]: Start difference. First operand has 278 places, 606 transitions, 10010 flow. Second operand 9 states and 180 transitions. [2024-06-21 18:46:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 704 transitions, 13382 flow [2024-06-21 18:46:47,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 704 transitions, 13055 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 18:46:47,813 INFO L231 Difference]: Finished difference. Result has 282 places, 648 transitions, 11224 flow [2024-06-21 18:46:47,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9683, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11224, PETRI_PLACES=282, PETRI_TRANSITIONS=648} [2024-06-21 18:46:47,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 18:46:47,814 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 648 transitions, 11224 flow [2024-06-21 18:46:47,814 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 18:46:47,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:47,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:47,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 18:46:47,814 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:47,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:47,815 INFO L85 PathProgramCache]: Analyzing trace with hash -952553052, now seen corresponding path program 5 times [2024-06-21 18:46:47,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:47,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830109119] [2024-06-21 18:46:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:47,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:49,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:49,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830109119] [2024-06-21 18:46:49,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830109119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:49,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:49,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:49,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194006707] [2024-06-21 18:46:49,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:49,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:49,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:49,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:46:49,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 648 transitions, 11224 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:49,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:49,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:46:49,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:51,346 INFO L124 PetriNetUnfolderBase]: 4181/6147 cut-off events. [2024-06-21 18:46:51,346 INFO L125 PetriNetUnfolderBase]: For 553644/553653 co-relation queries the response was YES. [2024-06-21 18:46:51,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65185 conditions, 6147 events. 4181/6147 cut-off events. For 553644/553653 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31847 event pairs, 796 based on Foata normal form. 10/6154 useless extension candidates. Maximal degree in co-relation 65058. Up to 4350 conditions per place. [2024-06-21 18:46:51,432 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 372 selfloop transitions, 333 changer transitions 0/708 dead transitions. [2024-06-21 18:46:51,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 708 transitions, 14356 flow [2024-06-21 18:46:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:46:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:46:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-21 18:46:51,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-21 18:46:51,433 INFO L175 Difference]: Start difference. First operand has 282 places, 648 transitions, 11224 flow. Second operand 8 states and 180 transitions. [2024-06-21 18:46:51,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 708 transitions, 14356 flow [2024-06-21 18:46:52,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 708 transitions, 14188 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-06-21 18:46:52,350 INFO L231 Difference]: Finished difference. Result has 290 places, 659 transitions, 12169 flow [2024-06-21 18:46:52,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11070, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12169, PETRI_PLACES=290, PETRI_TRANSITIONS=659} [2024-06-21 18:46:52,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-21 18:46:52,355 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 659 transitions, 12169 flow [2024-06-21 18:46:52,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:52,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:52,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:52,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 18:46:52,356 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:52,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:52,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1859284142, now seen corresponding path program 4 times [2024-06-21 18:46:52,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:52,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694036291] [2024-06-21 18:46:52,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:52,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:54,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694036291] [2024-06-21 18:46:54,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694036291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:54,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:54,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:54,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086160234] [2024-06-21 18:46:54,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:54,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:54,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:54,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:46:54,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 659 transitions, 12169 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:54,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:54,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:46:54,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:46:56,176 INFO L124 PetriNetUnfolderBase]: 4175/6139 cut-off events. [2024-06-21 18:46:56,176 INFO L125 PetriNetUnfolderBase]: For 575872/575881 co-relation queries the response was YES. [2024-06-21 18:46:56,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67643 conditions, 6139 events. 4175/6139 cut-off events. For 575872/575881 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31850 event pairs, 802 based on Foata normal form. 9/6145 useless extension candidates. Maximal degree in co-relation 67513. Up to 4644 conditions per place. [2024-06-21 18:46:56,255 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 390 selfloop transitions, 321 changer transitions 0/714 dead transitions. [2024-06-21 18:46:56,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 714 transitions, 14877 flow [2024-06-21 18:46:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:46:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:46:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 18:46:56,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-21 18:46:56,257 INFO L175 Difference]: Start difference. First operand has 290 places, 659 transitions, 12169 flow. Second operand 8 states and 171 transitions. [2024-06-21 18:46:56,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 714 transitions, 14877 flow [2024-06-21 18:46:57,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 714 transitions, 14349 flow, removed 116 selfloop flow, removed 3 redundant places. [2024-06-21 18:46:57,249 INFO L231 Difference]: Finished difference. Result has 295 places, 659 transitions, 12305 flow [2024-06-21 18:46:57,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11641, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12305, PETRI_PLACES=295, PETRI_TRANSITIONS=659} [2024-06-21 18:46:57,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-21 18:46:57,250 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 659 transitions, 12305 flow [2024-06-21 18:46:57,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:57,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:46:57,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:46:57,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 18:46:57,256 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:46:57,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:46:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -947618254, now seen corresponding path program 6 times [2024-06-21 18:46:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:46:57,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840853889] [2024-06-21 18:46:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:46:57,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:46:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:46:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:46:58,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:46:58,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840853889] [2024-06-21 18:46:58,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840853889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:46:58,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:46:58,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:46:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423920401] [2024-06-21 18:46:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:46:58,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:46:58,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:46:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:46:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:46:58,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:46:58,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 659 transitions, 12305 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:46:58,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:46:58,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:46:58,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:00,663 INFO L124 PetriNetUnfolderBase]: 4211/6191 cut-off events. [2024-06-21 18:47:00,664 INFO L125 PetriNetUnfolderBase]: For 599408/599417 co-relation queries the response was YES. [2024-06-21 18:47:00,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68908 conditions, 6191 events. 4211/6191 cut-off events. For 599408/599417 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32176 event pairs, 769 based on Foata normal form. 10/6198 useless extension candidates. Maximal degree in co-relation 68777. Up to 4560 conditions per place. [2024-06-21 18:47:00,749 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 342 selfloop transitions, 370 changer transitions 0/715 dead transitions. [2024-06-21 18:47:00,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 715 transitions, 15058 flow [2024-06-21 18:47:00,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:47:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:47:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 18:47:00,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-21 18:47:00,751 INFO L175 Difference]: Start difference. First operand has 295 places, 659 transitions, 12305 flow. Second operand 8 states and 176 transitions. [2024-06-21 18:47:00,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 715 transitions, 15058 flow [2024-06-21 18:47:01,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 715 transitions, 14422 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:01,628 INFO L231 Difference]: Finished difference. Result has 297 places, 663 transitions, 12570 flow [2024-06-21 18:47:01,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11681, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12570, PETRI_PLACES=297, PETRI_TRANSITIONS=663} [2024-06-21 18:47:01,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-21 18:47:01,629 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 663 transitions, 12570 flow [2024-06-21 18:47:01,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:01,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:01,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:01,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 18:47:01,630 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:01,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash -947796008, now seen corresponding path program 5 times [2024-06-21 18:47:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:01,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312263543] [2024-06-21 18:47:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:03,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312263543] [2024-06-21 18:47:03,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312263543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:03,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:03,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:03,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720314585] [2024-06-21 18:47:03,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:03,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:03,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:03,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:03,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:03,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:47:03,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 663 transitions, 12570 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:03,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:03,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:47:03,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:05,212 INFO L124 PetriNetUnfolderBase]: 4128/6107 cut-off events. [2024-06-21 18:47:05,212 INFO L125 PetriNetUnfolderBase]: For 611256/611308 co-relation queries the response was YES. [2024-06-21 18:47:05,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68402 conditions, 6107 events. 4128/6107 cut-off events. For 611256/611308 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32071 event pairs, 739 based on Foata normal form. 20/6104 useless extension candidates. Maximal degree in co-relation 68271. Up to 5278 conditions per place. [2024-06-21 18:47:05,291 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 465 selfloop transitions, 95 changer transitions 0/696 dead transitions. [2024-06-21 18:47:05,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 696 transitions, 14064 flow [2024-06-21 18:47:05,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:47:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:47:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 18:47:05,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-21 18:47:05,293 INFO L175 Difference]: Start difference. First operand has 297 places, 663 transitions, 12570 flow. Second operand 8 states and 161 transitions. [2024-06-21 18:47:05,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 696 transitions, 14064 flow [2024-06-21 18:47:06,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 696 transitions, 13240 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:06,303 INFO L231 Difference]: Finished difference. Result has 299 places, 665 transitions, 12071 flow [2024-06-21 18:47:06,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11746, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12071, PETRI_PLACES=299, PETRI_TRANSITIONS=665} [2024-06-21 18:47:06,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-21 18:47:06,304 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 665 transitions, 12071 flow [2024-06-21 18:47:06,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:06,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:06,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:06,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 18:47:06,304 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:06,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -952548402, now seen corresponding path program 7 times [2024-06-21 18:47:06,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:06,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921521066] [2024-06-21 18:47:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:07,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:07,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921521066] [2024-06-21 18:47:07,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921521066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:07,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:07,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:07,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365887317] [2024-06-21 18:47:07,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:07,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:07,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:07,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:47:07,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 665 transitions, 12071 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:07,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:07,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:47:07,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:09,630 INFO L124 PetriNetUnfolderBase]: 4232/6224 cut-off events. [2024-06-21 18:47:09,631 INFO L125 PetriNetUnfolderBase]: For 614556/614565 co-relation queries the response was YES. [2024-06-21 18:47:09,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68405 conditions, 6224 events. 4232/6224 cut-off events. For 614556/614565 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32338 event pairs, 783 based on Foata normal form. 10/6231 useless extension candidates. Maximal degree in co-relation 68273. Up to 4593 conditions per place. [2024-06-21 18:47:09,720 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 375 selfloop transitions, 339 changer transitions 0/717 dead transitions. [2024-06-21 18:47:09,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 717 transitions, 14810 flow [2024-06-21 18:47:09,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:47:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:47:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 18:47:09,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-21 18:47:09,721 INFO L175 Difference]: Start difference. First operand has 299 places, 665 transitions, 12071 flow. Second operand 8 states and 176 transitions. [2024-06-21 18:47:09,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 717 transitions, 14810 flow [2024-06-21 18:47:10,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 717 transitions, 14503 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:10,799 INFO L231 Difference]: Finished difference. Result has 301 places, 669 transitions, 12601 flow [2024-06-21 18:47:10,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11764, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12601, PETRI_PLACES=301, PETRI_TRANSITIONS=669} [2024-06-21 18:47:10,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-21 18:47:10,800 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 669 transitions, 12601 flow [2024-06-21 18:47:10,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:10,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:10,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:10,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 18:47:10,800 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 18:47:10,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2109278182, now seen corresponding path program 1 times [2024-06-21 18:47:10,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:10,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475468796] [2024-06-21 18:47:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:12,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:12,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475468796] [2024-06-21 18:47:12,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475468796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:12,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:12,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:47:12,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496056521] [2024-06-21 18:47:12,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:12,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:47:12,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:12,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:47:12,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:47:12,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:47:12,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 669 transitions, 12601 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:12,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:12,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:47:12,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:13,716 INFO L124 PetriNetUnfolderBase]: 4030/6002 cut-off events. [2024-06-21 18:47:13,717 INFO L125 PetriNetUnfolderBase]: For 625673/625694 co-relation queries the response was YES. [2024-06-21 18:47:13,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67621 conditions, 6002 events. 4030/6002 cut-off events. For 625673/625694 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31801 event pairs, 798 based on Foata normal form. 20/6019 useless extension candidates. Maximal degree in co-relation 67488. Up to 5643 conditions per place. [2024-06-21 18:47:13,802 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 582 selfloop transitions, 58 changer transitions 0/687 dead transitions. [2024-06-21 18:47:13,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 687 transitions, 14081 flow [2024-06-21 18:47:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:47:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:47:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 18:47:13,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 18:47:13,803 INFO L175 Difference]: Start difference. First operand has 301 places, 669 transitions, 12601 flow. Second operand 6 states and 117 transitions. [2024-06-21 18:47:13,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 687 transitions, 14081 flow [2024-06-21 18:47:14,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 687 transitions, 13255 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:14,840 INFO L231 Difference]: Finished difference. Result has 301 places, 669 transitions, 11919 flow [2024-06-21 18:47:14,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11775, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11919, PETRI_PLACES=301, PETRI_TRANSITIONS=669} [2024-06-21 18:47:14,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-21 18:47:14,842 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 669 transitions, 11919 flow [2024-06-21 18:47:14,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:14,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:14,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:14,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 18:47:14,842 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:14,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash -5965410, now seen corresponding path program 5 times [2024-06-21 18:47:14,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:14,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231569356] [2024-06-21 18:47:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:14,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:16,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:16,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231569356] [2024-06-21 18:47:16,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231569356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:16,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:16,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963537852] [2024-06-21 18:47:16,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:16,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:16,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:47:16,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 669 transitions, 11919 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:16,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:16,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:47:16,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:18,399 INFO L124 PetriNetUnfolderBase]: 4195/6179 cut-off events. [2024-06-21 18:47:18,399 INFO L125 PetriNetUnfolderBase]: For 626925/626925 co-relation queries the response was YES. [2024-06-21 18:47:18,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67196 conditions, 6179 events. 4195/6179 cut-off events. For 626925/626925 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32145 event pairs, 1100 based on Foata normal form. 6/6184 useless extension candidates. Maximal degree in co-relation 67062. Up to 5866 conditions per place. [2024-06-21 18:47:18,485 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 593 selfloop transitions, 96 changer transitions 0/692 dead transitions. [2024-06-21 18:47:18,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 692 transitions, 13711 flow [2024-06-21 18:47:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:47:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:47:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 18:47:18,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 18:47:18,487 INFO L175 Difference]: Start difference. First operand has 301 places, 669 transitions, 11919 flow. Second operand 8 states and 146 transitions. [2024-06-21 18:47:18,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 692 transitions, 13711 flow [2024-06-21 18:47:19,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 692 transitions, 13539 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 18:47:19,587 INFO L231 Difference]: Finished difference. Result has 305 places, 669 transitions, 11978 flow [2024-06-21 18:47:19,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11747, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11978, PETRI_PLACES=305, PETRI_TRANSITIONS=669} [2024-06-21 18:47:19,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 18:47:19,588 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 669 transitions, 11978 flow [2024-06-21 18:47:19,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:19,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:19,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:19,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 18:47:19,589 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:19,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:19,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1421376054, now seen corresponding path program 2 times [2024-06-21 18:47:19,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:19,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958606891] [2024-06-21 18:47:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:19,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:21,242 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 18:47:21,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:21,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958606891] [2024-06-21 18:47:21,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958606891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:21,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:21,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:21,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121981657] [2024-06-21 18:47:21,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:21,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:21,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:21,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:21,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:47:21,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 669 transitions, 11978 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:21,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:21,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:47:21,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:23,166 INFO L124 PetriNetUnfolderBase]: 4245/6261 cut-off events. [2024-06-21 18:47:23,166 INFO L125 PetriNetUnfolderBase]: For 650126/650129 co-relation queries the response was YES. [2024-06-21 18:47:23,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68246 conditions, 6261 events. 4245/6261 cut-off events. For 650126/650129 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32746 event pairs, 1106 based on Foata normal form. 8/6266 useless extension candidates. Maximal degree in co-relation 68110. Up to 5809 conditions per place. [2024-06-21 18:47:23,272 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 602 selfloop transitions, 101 changer transitions 0/706 dead transitions. [2024-06-21 18:47:23,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 706 transitions, 14060 flow [2024-06-21 18:47:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:47:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:47:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 18:47:23,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 18:47:23,274 INFO L175 Difference]: Start difference. First operand has 305 places, 669 transitions, 11978 flow. Second operand 8 states and 150 transitions. [2024-06-21 18:47:23,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 706 transitions, 14060 flow [2024-06-21 18:47:24,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 706 transitions, 13593 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 18:47:24,372 INFO L231 Difference]: Finished difference. Result has 304 places, 675 transitions, 11882 flow [2024-06-21 18:47:24,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11519, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11882, PETRI_PLACES=304, PETRI_TRANSITIONS=675} [2024-06-21 18:47:24,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 18:47:24,373 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 675 transitions, 11882 flow [2024-06-21 18:47:24,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:24,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:24,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:24,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 18:47:24,374 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 18:47:24,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:24,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1377750102, now seen corresponding path program 2 times [2024-06-21 18:47:24,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:24,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705989504] [2024-06-21 18:47:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:24,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:25,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:25,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705989504] [2024-06-21 18:47:25,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705989504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:25,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:25,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:47:25,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661717602] [2024-06-21 18:47:25,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:25,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:47:25,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:47:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:47:25,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:47:25,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 675 transitions, 11882 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:25,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:25,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:47:25,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:27,157 INFO L124 PetriNetUnfolderBase]: 4057/6062 cut-off events. [2024-06-21 18:47:27,158 INFO L125 PetriNetUnfolderBase]: For 640353/640392 co-relation queries the response was YES. [2024-06-21 18:47:27,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66858 conditions, 6062 events. 4057/6062 cut-off events. For 640353/640392 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 32573 event pairs, 1097 based on Foata normal form. 27/6077 useless extension candidates. Maximal degree in co-relation 66721. Up to 5714 conditions per place. [2024-06-21 18:47:27,244 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 603 selfloop transitions, 40 changer transitions 0/692 dead transitions. [2024-06-21 18:47:27,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 692 transitions, 13470 flow [2024-06-21 18:47:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:47:27,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:47:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 18:47:27,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:47:27,245 INFO L175 Difference]: Start difference. First operand has 304 places, 675 transitions, 11882 flow. Second operand 6 states and 108 transitions. [2024-06-21 18:47:27,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 692 transitions, 13470 flow [2024-06-21 18:47:28,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 692 transitions, 13161 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:28,276 INFO L231 Difference]: Finished difference. Result has 304 places, 680 transitions, 11809 flow [2024-06-21 18:47:28,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11577, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11809, PETRI_PLACES=304, PETRI_TRANSITIONS=680} [2024-06-21 18:47:28,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 18:47:28,277 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 680 transitions, 11809 flow [2024-06-21 18:47:28,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:28,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:28,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:28,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 18:47:28,278 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:28,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1742646512, now seen corresponding path program 6 times [2024-06-21 18:47:28,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:28,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111935981] [2024-06-21 18:47:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:28,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:29,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111935981] [2024-06-21 18:47:29,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111935981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:29,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:29,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937235322] [2024-06-21 18:47:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:29,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:29,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:47:29,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 680 transitions, 11809 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:29,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:29,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:47:29,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:31,726 INFO L124 PetriNetUnfolderBase]: 4245/6255 cut-off events. [2024-06-21 18:47:31,726 INFO L125 PetriNetUnfolderBase]: For 646014/646014 co-relation queries the response was YES. [2024-06-21 18:47:31,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67928 conditions, 6255 events. 4245/6255 cut-off events. For 646014/646014 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32567 event pairs, 1124 based on Foata normal form. 5/6259 useless extension candidates. Maximal degree in co-relation 67790. Up to 5779 conditions per place. [2024-06-21 18:47:31,828 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 623 selfloop transitions, 86 changer transitions 0/712 dead transitions. [2024-06-21 18:47:31,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 712 transitions, 14048 flow [2024-06-21 18:47:31,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:47:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:47:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 18:47:31,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 18:47:31,830 INFO L175 Difference]: Start difference. First operand has 304 places, 680 transitions, 11809 flow. Second operand 8 states and 148 transitions. [2024-06-21 18:47:31,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 712 transitions, 14048 flow [2024-06-21 18:47:32,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 712 transitions, 13936 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 18:47:32,887 INFO L231 Difference]: Finished difference. Result has 309 places, 680 transitions, 11888 flow [2024-06-21 18:47:32,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11697, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11888, PETRI_PLACES=309, PETRI_TRANSITIONS=680} [2024-06-21 18:47:32,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 18:47:32,888 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 680 transitions, 11888 flow [2024-06-21 18:47:32,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:32,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:32,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:32,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 18:47:32,888 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:32,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1514565872, now seen corresponding path program 7 times [2024-06-21 18:47:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:32,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246264288] [2024-06-21 18:47:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:32,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:34,361 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 18:47:34,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246264288] [2024-06-21 18:47:34,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246264288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:34,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:34,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:34,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079978696] [2024-06-21 18:47:34,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:34,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:34,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:34,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:47:34,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 680 transitions, 11888 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:34,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:34,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:47:34,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:36,337 INFO L124 PetriNetUnfolderBase]: 4244/6256 cut-off events. [2024-06-21 18:47:36,337 INFO L125 PetriNetUnfolderBase]: For 659278/659278 co-relation queries the response was YES. [2024-06-21 18:47:36,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68309 conditions, 6256 events. 4244/6256 cut-off events. For 659278/659278 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32657 event pairs, 1129 based on Foata normal form. 4/6259 useless extension candidates. Maximal degree in co-relation 68170. Up to 6061 conditions per place. [2024-06-21 18:47:36,420 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 669 selfloop transitions, 39 changer transitions 0/711 dead transitions. [2024-06-21 18:47:36,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 711 transitions, 13801 flow [2024-06-21 18:47:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:47:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:47:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 18:47:36,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 18:47:36,421 INFO L175 Difference]: Start difference. First operand has 309 places, 680 transitions, 11888 flow. Second operand 9 states and 150 transitions. [2024-06-21 18:47:36,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 711 transitions, 13801 flow [2024-06-21 18:47:37,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 711 transitions, 13607 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:37,436 INFO L231 Difference]: Finished difference. Result has 312 places, 686 transitions, 11979 flow [2024-06-21 18:47:37,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11711, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11979, PETRI_PLACES=312, PETRI_TRANSITIONS=686} [2024-06-21 18:47:37,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 18:47:37,437 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 686 transitions, 11979 flow [2024-06-21 18:47:37,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:37,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:37,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:37,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 18:47:37,437 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:37,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1270065710, now seen corresponding path program 8 times [2024-06-21 18:47:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:37,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184001532] [2024-06-21 18:47:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:37,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:38,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:38,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184001532] [2024-06-21 18:47:38,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184001532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:38,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:38,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272161929] [2024-06-21 18:47:38,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:38,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:38,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:38,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:47:38,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 686 transitions, 11979 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:38,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:38,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:47:38,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:41,072 INFO L124 PetriNetUnfolderBase]: 4291/6324 cut-off events. [2024-06-21 18:47:41,073 INFO L125 PetriNetUnfolderBase]: For 669081/669081 co-relation queries the response was YES. [2024-06-21 18:47:41,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68911 conditions, 6324 events. 4291/6324 cut-off events. For 669081/669081 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 33038 event pairs, 1131 based on Foata normal form. 6/6329 useless extension candidates. Maximal degree in co-relation 68771. Up to 6030 conditions per place. [2024-06-21 18:47:41,171 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 669 selfloop transitions, 56 changer transitions 0/728 dead transitions. [2024-06-21 18:47:41,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 728 transitions, 14360 flow [2024-06-21 18:47:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 18:47:41,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-21 18:47:41,173 INFO L175 Difference]: Start difference. First operand has 312 places, 686 transitions, 11979 flow. Second operand 10 states and 171 transitions. [2024-06-21 18:47:41,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 728 transitions, 14360 flow [2024-06-21 18:47:42,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 728 transitions, 14193 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-21 18:47:42,386 INFO L231 Difference]: Finished difference. Result has 315 places, 694 transitions, 12261 flow [2024-06-21 18:47:42,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11812, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12261, PETRI_PLACES=315, PETRI_TRANSITIONS=694} [2024-06-21 18:47:42,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 18:47:42,387 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 694 transitions, 12261 flow [2024-06-21 18:47:42,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:42,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:42,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:42,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 18:47:42,387 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:42,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:42,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1742651472, now seen corresponding path program 6 times [2024-06-21 18:47:42,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:42,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480800649] [2024-06-21 18:47:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:42,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:44,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:44,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480800649] [2024-06-21 18:47:44,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480800649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:44,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:44,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:44,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938419159] [2024-06-21 18:47:44,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:44,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:44,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:44,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:44,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:47:44,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 694 transitions, 12261 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:44,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:44,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:47:44,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:45,966 INFO L124 PetriNetUnfolderBase]: 4182/6210 cut-off events. [2024-06-21 18:47:45,966 INFO L125 PetriNetUnfolderBase]: For 696209/696244 co-relation queries the response was YES. [2024-06-21 18:47:46,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68377 conditions, 6210 events. 4182/6210 cut-off events. For 696209/696244 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32909 event pairs, 1059 based on Foata normal form. 14/6193 useless extension candidates. Maximal degree in co-relation 68236. Up to 5528 conditions per place. [2024-06-21 18:47:46,068 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 552 selfloop transitions, 27 changer transitions 0/723 dead transitions. [2024-06-21 18:47:46,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 723 transitions, 13747 flow [2024-06-21 18:47:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:47:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:47:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 18:47:46,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 18:47:46,070 INFO L175 Difference]: Start difference. First operand has 315 places, 694 transitions, 12261 flow. Second operand 9 states and 156 transitions. [2024-06-21 18:47:46,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 723 transitions, 13747 flow [2024-06-21 18:47:47,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 723 transitions, 13539 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-21 18:47:47,114 INFO L231 Difference]: Finished difference. Result has 318 places, 696 transitions, 12250 flow [2024-06-21 18:47:47,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12053, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12250, PETRI_PLACES=318, PETRI_TRANSITIONS=696} [2024-06-21 18:47:47,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 18:47:47,115 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 696 transitions, 12250 flow [2024-06-21 18:47:47,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:47,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:47,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:47,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 18:47:47,115 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 18:47:47,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash -600663492, now seen corresponding path program 1 times [2024-06-21 18:47:47,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:47,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144589494] [2024-06-21 18:47:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:47,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:48,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:48,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144589494] [2024-06-21 18:47:48,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144589494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:48,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:48,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:47:48,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047284577] [2024-06-21 18:47:48,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:48,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:47:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:48,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:47:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:47:48,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:47:48,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 696 transitions, 12250 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 18:47:48,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:48,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:47:48,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:50,058 INFO L124 PetriNetUnfolderBase]: 4107/6136 cut-off events. [2024-06-21 18:47:50,058 INFO L125 PetriNetUnfolderBase]: For 699027/699066 co-relation queries the response was YES. [2024-06-21 18:47:50,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67917 conditions, 6136 events. 4107/6136 cut-off events. For 699027/699066 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32929 event pairs, 1090 based on Foata normal form. 27/6151 useless extension candidates. Maximal degree in co-relation 67774. Up to 5757 conditions per place. [2024-06-21 18:47:50,146 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 623 selfloop transitions, 46 changer transitions 0/718 dead transitions. [2024-06-21 18:47:50,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 718 transitions, 13854 flow [2024-06-21 18:47:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:47:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:47:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 18:47:50,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 18:47:50,148 INFO L175 Difference]: Start difference. First operand has 318 places, 696 transitions, 12250 flow. Second operand 7 states and 123 transitions. [2024-06-21 18:47:50,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 718 transitions, 13854 flow [2024-06-21 18:47:51,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 718 transitions, 13675 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-21 18:47:51,312 INFO L231 Difference]: Finished difference. Result has 319 places, 705 transitions, 12283 flow [2024-06-21 18:47:51,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12071, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12283, PETRI_PLACES=319, PETRI_TRANSITIONS=705} [2024-06-21 18:47:51,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 18:47:51,313 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 705 transitions, 12283 flow [2024-06-21 18:47:51,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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 18:47:51,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:51,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:51,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 18:47:51,313 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:51,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:51,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1506291414, now seen corresponding path program 3 times [2024-06-21 18:47:51,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:51,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401759950] [2024-06-21 18:47:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:51,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:52,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401759950] [2024-06-21 18:47:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401759950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:52,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:52,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174735326] [2024-06-21 18:47:52,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:52,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:52,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:47:52,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 705 transitions, 12283 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:52,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:52,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:47:52,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:54,659 INFO L124 PetriNetUnfolderBase]: 4339/6395 cut-off events. [2024-06-21 18:47:54,659 INFO L125 PetriNetUnfolderBase]: For 718832/718832 co-relation queries the response was YES. [2024-06-21 18:47:54,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70462 conditions, 6395 events. 4339/6395 cut-off events. For 718832/718832 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 33493 event pairs, 1132 based on Foata normal form. 6/6400 useless extension candidates. Maximal degree in co-relation 70316. Up to 6206 conditions per place. [2024-06-21 18:47:54,903 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 696 selfloop transitions, 43 changer transitions 0/742 dead transitions. [2024-06-21 18:47:54,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 742 transitions, 14396 flow [2024-06-21 18:47:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:47:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:47:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 18:47:54,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-21 18:47:54,905 INFO L175 Difference]: Start difference. First operand has 319 places, 705 transitions, 12283 flow. Second operand 10 states and 171 transitions. [2024-06-21 18:47:54,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 742 transitions, 14396 flow [2024-06-21 18:47:56,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 742 transitions, 14357 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-21 18:47:56,101 INFO L231 Difference]: Finished difference. Result has 329 places, 712 transitions, 12642 flow [2024-06-21 18:47:56,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12244, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12642, PETRI_PLACES=329, PETRI_TRANSITIONS=712} [2024-06-21 18:47:56,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-21 18:47:56,102 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 712 transitions, 12642 flow [2024-06-21 18:47:56,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:56,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:47:56,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:47:56,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 18:47:56,102 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:47:56,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:47:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1742651348, now seen corresponding path program 9 times [2024-06-21 18:47:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:47:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671352710] [2024-06-21 18:47:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:47:56,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:47:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:47:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:47:57,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:47:57,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671352710] [2024-06-21 18:47:57,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671352710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:47:57,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:47:57,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:47:57,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604233522] [2024-06-21 18:47:57,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:47:57,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:47:57,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:47:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:47:57,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:47:57,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:47:57,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 712 transitions, 12642 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:47:57,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:47:57,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:47:57,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:47:59,764 INFO L124 PetriNetUnfolderBase]: 4417/6507 cut-off events. [2024-06-21 18:47:59,764 INFO L125 PetriNetUnfolderBase]: For 770112/770112 co-relation queries the response was YES. [2024-06-21 18:47:59,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72838 conditions, 6507 events. 4417/6507 cut-off events. For 770112/770112 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 34108 event pairs, 1123 based on Foata normal form. 6/6512 useless extension candidates. Maximal degree in co-relation 72688. Up to 5976 conditions per place. [2024-06-21 18:47:59,862 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 674 selfloop transitions, 90 changer transitions 0/767 dead transitions. [2024-06-21 18:47:59,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 767 transitions, 15682 flow [2024-06-21 18:47:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:47:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:47:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 18:47:59,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 18:47:59,864 INFO L175 Difference]: Start difference. First operand has 329 places, 712 transitions, 12642 flow. Second operand 9 states and 169 transitions. [2024-06-21 18:47:59,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 767 transitions, 15682 flow [2024-06-21 18:48:01,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 767 transitions, 15326 flow, removed 133 selfloop flow, removed 8 redundant places. [2024-06-21 18:48:01,321 INFO L231 Difference]: Finished difference. Result has 332 places, 726 transitions, 12904 flow [2024-06-21 18:48:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12286, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12904, PETRI_PLACES=332, PETRI_TRANSITIONS=726} [2024-06-21 18:48:01,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-21 18:48:01,322 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 726 transitions, 12904 flow [2024-06-21 18:48:01,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:01,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:01,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 18:48:01,323 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:01,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1465975546, now seen corresponding path program 10 times [2024-06-21 18:48:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:01,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368281428] [2024-06-21 18:48:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:02,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368281428] [2024-06-21 18:48:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368281428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:02,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:02,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:02,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939474341] [2024-06-21 18:48:02,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:02,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:03,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:03,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 726 transitions, 12904 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:03,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:03,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:03,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:04,928 INFO L124 PetriNetUnfolderBase]: 4453/6559 cut-off events. [2024-06-21 18:48:04,928 INFO L125 PetriNetUnfolderBase]: For 803466/803466 co-relation queries the response was YES. [2024-06-21 18:48:04,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74531 conditions, 6559 events. 4453/6559 cut-off events. For 803466/803466 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 34425 event pairs, 1127 based on Foata normal form. 6/6564 useless extension candidates. Maximal degree in co-relation 74380. Up to 6161 conditions per place. [2024-06-21 18:48:05,034 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 678 selfloop transitions, 85 changer transitions 0/766 dead transitions. [2024-06-21 18:48:05,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 766 transitions, 15411 flow [2024-06-21 18:48:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:48:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:48:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 18:48:05,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 18:48:05,036 INFO L175 Difference]: Start difference. First operand has 332 places, 726 transitions, 12904 flow. Second operand 9 states and 165 transitions. [2024-06-21 18:48:05,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 766 transitions, 15411 flow [2024-06-21 18:48:06,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 766 transitions, 15032 flow, removed 116 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:06,664 INFO L231 Difference]: Finished difference. Result has 337 places, 730 transitions, 12884 flow [2024-06-21 18:48:06,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12547, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12884, PETRI_PLACES=337, PETRI_TRANSITIONS=730} [2024-06-21 18:48:06,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-21 18:48:06,665 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 730 transitions, 12884 flow [2024-06-21 18:48:06,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:06,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:06,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:06,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 18:48:06,666 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:06,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1735980272, now seen corresponding path program 8 times [2024-06-21 18:48:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:06,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253705079] [2024-06-21 18:48:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:06,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:08,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253705079] [2024-06-21 18:48:08,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253705079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:08,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:08,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:08,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726158543] [2024-06-21 18:48:08,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:08,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:08,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:08,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:08,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 730 transitions, 12884 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:08,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:08,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:08,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:10,038 INFO L124 PetriNetUnfolderBase]: 4444/6546 cut-off events. [2024-06-21 18:48:10,039 INFO L125 PetriNetUnfolderBase]: For 804500/804500 co-relation queries the response was YES. [2024-06-21 18:48:10,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74369 conditions, 6546 events. 4444/6546 cut-off events. For 804500/804500 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 34363 event pairs, 1126 based on Foata normal form. 3/6548 useless extension candidates. Maximal degree in co-relation 74216. Up to 6352 conditions per place. [2024-06-21 18:48:10,142 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 707 selfloop transitions, 50 changer transitions 0/760 dead transitions. [2024-06-21 18:48:10,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 760 transitions, 14773 flow [2024-06-21 18:48:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 18:48:10,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-21 18:48:10,143 INFO L175 Difference]: Start difference. First operand has 337 places, 730 transitions, 12884 flow. Second operand 10 states and 172 transitions. [2024-06-21 18:48:10,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 760 transitions, 14773 flow [2024-06-21 18:48:11,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 760 transitions, 14413 flow, removed 97 selfloop flow, removed 7 redundant places. [2024-06-21 18:48:11,701 INFO L231 Difference]: Finished difference. Result has 340 places, 730 transitions, 12641 flow [2024-06-21 18:48:11,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12524, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12641, PETRI_PLACES=340, PETRI_TRANSITIONS=730} [2024-06-21 18:48:11,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-21 18:48:11,702 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 730 transitions, 12641 flow [2024-06-21 18:48:11,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:11,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:11,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:11,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 18:48:11,703 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:11,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1514565624, now seen corresponding path program 4 times [2024-06-21 18:48:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:11,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861967153] [2024-06-21 18:48:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:13,353 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 18:48:13,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:13,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861967153] [2024-06-21 18:48:13,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861967153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:13,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:13,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:13,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778001915] [2024-06-21 18:48:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:13,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:13,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:13,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:13,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:13,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 730 transitions, 12641 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:13,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:13,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:13,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:15,462 INFO L124 PetriNetUnfolderBase]: 4472/6590 cut-off events. [2024-06-21 18:48:15,463 INFO L125 PetriNetUnfolderBase]: For 829419/829419 co-relation queries the response was YES. [2024-06-21 18:48:15,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74672 conditions, 6590 events. 4472/6590 cut-off events. For 829419/829419 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34608 event pairs, 1129 based on Foata normal form. 6/6595 useless extension candidates. Maximal degree in co-relation 74518. Up to 6413 conditions per place. [2024-06-21 18:48:15,549 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 723 selfloop transitions, 32 changer transitions 0/758 dead transitions. [2024-06-21 18:48:15,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 758 transitions, 14612 flow [2024-06-21 18:48:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 18:48:15,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 18:48:15,550 INFO L175 Difference]: Start difference. First operand has 340 places, 730 transitions, 12641 flow. Second operand 8 states and 141 transitions. [2024-06-21 18:48:15,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 758 transitions, 14612 flow [2024-06-21 18:48:16,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 758 transitions, 14506 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 18:48:16,855 INFO L231 Difference]: Finished difference. Result has 339 places, 733 transitions, 12764 flow [2024-06-21 18:48:16,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12535, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12764, PETRI_PLACES=339, PETRI_TRANSITIONS=733} [2024-06-21 18:48:16,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-21 18:48:16,856 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 733 transitions, 12764 flow [2024-06-21 18:48:16,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:16,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:16,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:16,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 18:48:16,857 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:16,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1742473718, now seen corresponding path program 11 times [2024-06-21 18:48:16,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:16,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137680005] [2024-06-21 18:48:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:18,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:18,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137680005] [2024-06-21 18:48:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137680005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:18,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:18,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:18,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730122594] [2024-06-21 18:48:18,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:18,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:18,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:18,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 733 transitions, 12764 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:18,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:18,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:18,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:20,478 INFO L124 PetriNetUnfolderBase]: 4476/6596 cut-off events. [2024-06-21 18:48:20,478 INFO L125 PetriNetUnfolderBase]: For 845915/845915 co-relation queries the response was YES. [2024-06-21 18:48:20,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74945 conditions, 6596 events. 4476/6596 cut-off events. For 845915/845915 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34637 event pairs, 1123 based on Foata normal form. 6/6601 useless extension candidates. Maximal degree in co-relation 74790. Up to 6202 conditions per place. [2024-06-21 18:48:20,585 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 687 selfloop transitions, 84 changer transitions 0/774 dead transitions. [2024-06-21 18:48:20,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 774 transitions, 15081 flow [2024-06-21 18:48:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:48:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:48:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 18:48:20,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 18:48:20,587 INFO L175 Difference]: Start difference. First operand has 339 places, 733 transitions, 12764 flow. Second operand 9 states and 163 transitions. [2024-06-21 18:48:20,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 774 transitions, 15081 flow [2024-06-21 18:48:22,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 774 transitions, 14878 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-21 18:48:22,325 INFO L231 Difference]: Finished difference. Result has 343 places, 740 transitions, 12947 flow [2024-06-21 18:48:22,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12561, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12947, PETRI_PLACES=343, PETRI_TRANSITIONS=740} [2024-06-21 18:48:22,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-21 18:48:22,326 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 740 transitions, 12947 flow [2024-06-21 18:48:22,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:22,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:22,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:22,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 18:48:22,327 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:22,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1505994744, now seen corresponding path program 5 times [2024-06-21 18:48:22,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:22,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463966981] [2024-06-21 18:48:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:22,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:23,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:23,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463966981] [2024-06-21 18:48:23,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463966981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:23,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:23,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:23,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965674199] [2024-06-21 18:48:23,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:23,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:23,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:23,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:23,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:23,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 740 transitions, 12947 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:23,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:23,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:23,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:25,746 INFO L124 PetriNetUnfolderBase]: 4504/6640 cut-off events. [2024-06-21 18:48:25,747 INFO L125 PetriNetUnfolderBase]: For 868114/868114 co-relation queries the response was YES. [2024-06-21 18:48:25,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75818 conditions, 6640 events. 4504/6640 cut-off events. For 868114/868114 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34984 event pairs, 1109 based on Foata normal form. 6/6645 useless extension candidates. Maximal degree in co-relation 75661. Up to 6445 conditions per place. [2024-06-21 18:48:25,860 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 734 selfloop transitions, 36 changer transitions 0/773 dead transitions. [2024-06-21 18:48:25,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 773 transitions, 14987 flow [2024-06-21 18:48:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:48:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:48:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-21 18:48:25,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946784922394678 [2024-06-21 18:48:25,862 INFO L175 Difference]: Start difference. First operand has 343 places, 740 transitions, 12947 flow. Second operand 11 states and 178 transitions. [2024-06-21 18:48:25,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 773 transitions, 14987 flow [2024-06-21 18:48:27,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 773 transitions, 14737 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-21 18:48:27,691 INFO L231 Difference]: Finished difference. Result has 349 places, 743 transitions, 12941 flow [2024-06-21 18:48:27,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12697, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12941, PETRI_PLACES=349, PETRI_TRANSITIONS=743} [2024-06-21 18:48:27,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-21 18:48:27,692 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 743 transitions, 12941 flow [2024-06-21 18:48:27,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:27,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:27,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:27,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 18:48:27,693 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:27,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:27,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1465795622, now seen corresponding path program 6 times [2024-06-21 18:48:27,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:27,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443656371] [2024-06-21 18:48:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:27,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:29,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:29,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443656371] [2024-06-21 18:48:29,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443656371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:29,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:29,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:48:29,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048087423] [2024-06-21 18:48:29,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:29,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:48:29,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:48:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:48:29,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:29,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 743 transitions, 12941 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:29,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:29,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:29,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:31,189 INFO L124 PetriNetUnfolderBase]: 4507/6645 cut-off events. [2024-06-21 18:48:31,190 INFO L125 PetriNetUnfolderBase]: For 879529/879529 co-relation queries the response was YES. [2024-06-21 18:48:31,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75599 conditions, 6645 events. 4507/6645 cut-off events. For 879529/879529 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34986 event pairs, 1128 based on Foata normal form. 6/6650 useless extension candidates. Maximal degree in co-relation 75441. Up to 6366 conditions per place. [2024-06-21 18:48:31,297 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 717 selfloop transitions, 54 changer transitions 0/774 dead transitions. [2024-06-21 18:48:31,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 774 transitions, 15138 flow [2024-06-21 18:48:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:48:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:48:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 18:48:31,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:48:31,298 INFO L175 Difference]: Start difference. First operand has 349 places, 743 transitions, 12941 flow. Second operand 8 states and 144 transitions. [2024-06-21 18:48:31,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 774 transitions, 15138 flow [2024-06-21 18:48:32,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 774 transitions, 14906 flow, removed 82 selfloop flow, removed 9 redundant places. [2024-06-21 18:48:32,902 INFO L231 Difference]: Finished difference. Result has 348 places, 746 transitions, 12996 flow [2024-06-21 18:48:32,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12709, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12996, PETRI_PLACES=348, PETRI_TRANSITIONS=746} [2024-06-21 18:48:32,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-21 18:48:32,903 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 746 transitions, 12996 flow [2024-06-21 18:48:32,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:32,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:32,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:32,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 18:48:32,903 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 18:48:32,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash -899693504, now seen corresponding path program 3 times [2024-06-21 18:48:32,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:32,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803995427] [2024-06-21 18:48:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:34,029 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 18:48:34,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:34,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803995427] [2024-06-21 18:48:34,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803995427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:34,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:34,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:34,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741641112] [2024-06-21 18:48:34,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:34,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:34,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:34,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:34,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:34,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:48:34,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 746 transitions, 12996 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:34,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:34,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:48:34,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:35,891 INFO L124 PetriNetUnfolderBase]: 4275/6399 cut-off events. [2024-06-21 18:48:35,892 INFO L125 PetriNetUnfolderBase]: For 883377/883410 co-relation queries the response was YES. [2024-06-21 18:48:35,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73277 conditions, 6399 events. 4275/6399 cut-off events. For 883377/883410 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 34664 event pairs, 1100 based on Foata normal form. 19/6405 useless extension candidates. Maximal degree in co-relation 73118. Up to 6051 conditions per place. [2024-06-21 18:48:35,981 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 685 selfloop transitions, 15 changer transitions 0/754 dead transitions. [2024-06-21 18:48:35,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 754 transitions, 14438 flow [2024-06-21 18:48:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 18:48:35,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-21 18:48:35,982 INFO L175 Difference]: Start difference. First operand has 348 places, 746 transitions, 12996 flow. Second operand 6 states and 101 transitions. [2024-06-21 18:48:35,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 754 transitions, 14438 flow [2024-06-21 18:48:37,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 754 transitions, 14157 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-21 18:48:37,365 INFO L231 Difference]: Finished difference. Result has 348 places, 746 transitions, 12753 flow [2024-06-21 18:48:37,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12715, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12753, PETRI_PLACES=348, PETRI_TRANSITIONS=746} [2024-06-21 18:48:37,366 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-21 18:48:37,367 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 746 transitions, 12753 flow [2024-06-21 18:48:37,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:37,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:37,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:37,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 18:48:37,367 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 18:48:37,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1392484322, now seen corresponding path program 1 times [2024-06-21 18:48:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:37,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106553539] [2024-06-21 18:48:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:37,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:38,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:38,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106553539] [2024-06-21 18:48:38,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106553539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:38,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:38,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:38,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664194169] [2024-06-21 18:48:38,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:38,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:38,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:38,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:38,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:38,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:38,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 746 transitions, 12753 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 18:48:38,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:38,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:38,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:40,911 INFO L124 PetriNetUnfolderBase]: 4498/6633 cut-off events. [2024-06-21 18:48:40,911 INFO L125 PetriNetUnfolderBase]: For 892142/892142 co-relation queries the response was YES. [2024-06-21 18:48:40,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75069 conditions, 6633 events. 4498/6633 cut-off events. For 892142/892142 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34864 event pairs, 1128 based on Foata normal form. 3/6635 useless extension candidates. Maximal degree in co-relation 74909. Up to 6498 conditions per place. [2024-06-21 18:48:41,032 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 728 selfloop transitions, 26 changer transitions 0/757 dead transitions. [2024-06-21 18:48:41,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 757 transitions, 14495 flow [2024-06-21 18:48:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 18:48:41,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 18:48:41,033 INFO L175 Difference]: Start difference. First operand has 348 places, 746 transitions, 12753 flow. Second operand 6 states and 106 transitions. [2024-06-21 18:48:41,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 757 transitions, 14495 flow [2024-06-21 18:48:42,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 757 transitions, 14417 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:48:42,533 INFO L231 Difference]: Finished difference. Result has 347 places, 745 transitions, 12760 flow [2024-06-21 18:48:42,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12641, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12760, PETRI_PLACES=347, PETRI_TRANSITIONS=745} [2024-06-21 18:48:42,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-21 18:48:42,534 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 745 transitions, 12760 flow [2024-06-21 18:48:42,534 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 18:48:42,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:42,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:42,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 18:48:42,535 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 18:48:42,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:42,535 INFO L85 PathProgramCache]: Analyzing trace with hash -899687552, now seen corresponding path program 2 times [2024-06-21 18:48:42,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:42,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977672842] [2024-06-21 18:48:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:43,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:43,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977672842] [2024-06-21 18:48:43,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977672842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:43,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:43,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:48:43,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942667557] [2024-06-21 18:48:43,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:43,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:48:43,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:48:43,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:48:44,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:48:44,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 745 transitions, 12760 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 18:48:44,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:44,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:48:44,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:45,867 INFO L124 PetriNetUnfolderBase]: 4461/6578 cut-off events. [2024-06-21 18:48:45,867 INFO L125 PetriNetUnfolderBase]: For 905011/905014 co-relation queries the response was YES. [2024-06-21 18:48:45,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74825 conditions, 6578 events. 4461/6578 cut-off events. For 905011/905014 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 34511 event pairs, 1144 based on Foata normal form. 1/6576 useless extension candidates. Maximal degree in co-relation 74664. Up to 6444 conditions per place. [2024-06-21 18:48:45,977 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 723 selfloop transitions, 27 changer transitions 0/753 dead transitions. [2024-06-21 18:48:45,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 753 transitions, 14302 flow [2024-06-21 18:48:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:48:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:48:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 18:48:45,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-21 18:48:45,979 INFO L175 Difference]: Start difference. First operand has 347 places, 745 transitions, 12760 flow. Second operand 6 states and 103 transitions. [2024-06-21 18:48:45,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 753 transitions, 14302 flow [2024-06-21 18:48:47,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 753 transitions, 14260 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 18:48:47,747 INFO L231 Difference]: Finished difference. Result has 349 places, 745 transitions, 12780 flow [2024-06-21 18:48:47,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12718, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12780, PETRI_PLACES=349, PETRI_TRANSITIONS=745} [2024-06-21 18:48:47,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-21 18:48:47,748 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 745 transitions, 12780 flow [2024-06-21 18:48:47,748 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 18:48:47,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:47,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:47,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 18:48:47,749 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:47,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash 146782558, now seen corresponding path program 1 times [2024-06-21 18:48:47,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:47,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335392420] [2024-06-21 18:48:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:47,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:49,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:49,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335392420] [2024-06-21 18:48:49,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335392420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:49,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:49,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:48:49,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323591319] [2024-06-21 18:48:49,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:49,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:48:49,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:49,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:48:49,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:48:49,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 18:48:49,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 745 transitions, 12780 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 18:48:49,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:49,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 18:48:49,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:51,774 INFO L124 PetriNetUnfolderBase]: 4423/6764 cut-off events. [2024-06-21 18:48:51,774 INFO L125 PetriNetUnfolderBase]: For 1149157/1149184 co-relation queries the response was YES. [2024-06-21 18:48:51,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84331 conditions, 6764 events. 4423/6764 cut-off events. For 1149157/1149184 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 38757 event pairs, 550 based on Foata normal form. 12/6753 useless extension candidates. Maximal degree in co-relation 84168. Up to 4031 conditions per place. [2024-06-21 18:48:51,893 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 519 selfloop transitions, 184 changer transitions 0/825 dead transitions. [2024-06-21 18:48:51,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 825 transitions, 16304 flow [2024-06-21 18:48:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:48:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:48:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-21 18:48:51,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-21 18:48:51,895 INFO L175 Difference]: Start difference. First operand has 349 places, 745 transitions, 12780 flow. Second operand 10 states and 223 transitions. [2024-06-21 18:48:51,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 825 transitions, 16304 flow [2024-06-21 18:48:53,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 825 transitions, 16265 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 18:48:53,958 INFO L231 Difference]: Finished difference. Result has 359 places, 761 transitions, 13848 flow [2024-06-21 18:48:53,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12741, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13848, PETRI_PLACES=359, PETRI_TRANSITIONS=761} [2024-06-21 18:48:53,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-21 18:48:53,959 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 761 transitions, 13848 flow [2024-06-21 18:48:53,959 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 18:48:53,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:48:53,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:48:53,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 18:48:53,960 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:48:53,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:48:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1845782268, now seen corresponding path program 2 times [2024-06-21 18:48:53,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:48:53,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756510101] [2024-06-21 18:48:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:48:53,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:48:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:48:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:48:55,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:48:55,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756510101] [2024-06-21 18:48:55,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756510101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:48:55,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:48:55,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:48:55,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287532296] [2024-06-21 18:48:55,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:48:55,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:48:55,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:48:55,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:48:55,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:48:56,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:48:56,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 761 transitions, 13848 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:48:56,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:48:56,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:48:56,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:48:58,642 INFO L124 PetriNetUnfolderBase]: 5406/8060 cut-off events. [2024-06-21 18:48:58,643 INFO L125 PetriNetUnfolderBase]: For 1496646/1496655 co-relation queries the response was YES. [2024-06-21 18:48:58,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105401 conditions, 8060 events. 5406/8060 cut-off events. For 1496646/1496655 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45231 event pairs, 945 based on Foata normal form. 40/8099 useless extension candidates. Maximal degree in co-relation 105234. Up to 5593 conditions per place. [2024-06-21 18:48:58,795 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 607 selfloop transitions, 230 changer transitions 0/840 dead transitions. [2024-06-21 18:48:58,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 840 transitions, 17627 flow [2024-06-21 18:48:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:48:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:48:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-21 18:48:58,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-21 18:48:58,797 INFO L175 Difference]: Start difference. First operand has 359 places, 761 transitions, 13848 flow. Second operand 11 states and 225 transitions. [2024-06-21 18:48:58,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 840 transitions, 17627 flow [2024-06-21 18:49:01,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 840 transitions, 17245 flow, removed 177 selfloop flow, removed 2 redundant places. [2024-06-21 18:49:01,922 INFO L231 Difference]: Finished difference. Result has 369 places, 773 transitions, 14650 flow [2024-06-21 18:49:01,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13638, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14650, PETRI_PLACES=369, PETRI_TRANSITIONS=773} [2024-06-21 18:49:01,923 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-21 18:49:01,923 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 773 transitions, 14650 flow [2024-06-21 18:49:01,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:01,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:01,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:01,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 18:49:01,924 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:01,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash 580202760, now seen corresponding path program 3 times [2024-06-21 18:49:01,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:01,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177249647] [2024-06-21 18:49:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:01,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:04,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:04,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177249647] [2024-06-21 18:49:04,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177249647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:04,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:04,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:49:04,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849844734] [2024-06-21 18:49:04,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:04,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:49:04,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:49:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:49:04,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:49:04,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 773 transitions, 14650 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:04,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:04,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:49:04,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:06,905 INFO L124 PetriNetUnfolderBase]: 5618/8433 cut-off events. [2024-06-21 18:49:06,905 INFO L125 PetriNetUnfolderBase]: For 1635807/1635816 co-relation queries the response was YES. [2024-06-21 18:49:07,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110842 conditions, 8433 events. 5618/8433 cut-off events. For 1635807/1635816 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 48526 event pairs, 1373 based on Foata normal form. 48/8480 useless extension candidates. Maximal degree in co-relation 110671. Up to 7013 conditions per place. [2024-06-21 18:49:07,054 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 611 selfloop transitions, 222 changer transitions 0/836 dead transitions. [2024-06-21 18:49:07,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 836 transitions, 17515 flow [2024-06-21 18:49:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:49:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:49:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 18:49:07,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 18:49:07,056 INFO L175 Difference]: Start difference. First operand has 369 places, 773 transitions, 14650 flow. Second operand 10 states and 210 transitions. [2024-06-21 18:49:07,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 836 transitions, 17515 flow [2024-06-21 18:49:09,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 836 transitions, 17024 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-21 18:49:09,785 INFO L231 Difference]: Finished difference. Result has 373 places, 778 transitions, 14870 flow [2024-06-21 18:49:09,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14159, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14870, PETRI_PLACES=373, PETRI_TRANSITIONS=778} [2024-06-21 18:49:09,786 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-21 18:49:09,786 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 778 transitions, 14870 flow [2024-06-21 18:49:09,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:09,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:09,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:09,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:49:09,787 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:09,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:09,787 INFO L85 PathProgramCache]: Analyzing trace with hash -855218048, now seen corresponding path program 4 times [2024-06-21 18:49:09,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:09,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257612170] [2024-06-21 18:49:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:09,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:12,050 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 18:49:12,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:12,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257612170] [2024-06-21 18:49:12,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257612170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:12,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:12,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:49:12,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991270939] [2024-06-21 18:49:12,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:12,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:49:12,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:12,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:49:12,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:49:12,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:49:12,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 778 transitions, 14870 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:12,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:12,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:49:12,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:15,449 INFO L124 PetriNetUnfolderBase]: 5907/8888 cut-off events. [2024-06-21 18:49:15,449 INFO L125 PetriNetUnfolderBase]: For 1757146/1757155 co-relation queries the response was YES. [2024-06-21 18:49:15,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117855 conditions, 8888 events. 5907/8888 cut-off events. For 1757146/1757155 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 51967 event pairs, 1417 based on Foata normal form. 40/8927 useless extension candidates. Maximal degree in co-relation 117683. Up to 6893 conditions per place. [2024-06-21 18:49:15,604 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 620 selfloop transitions, 227 changer transitions 0/850 dead transitions. [2024-06-21 18:49:15,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 850 transitions, 18109 flow [2024-06-21 18:49:15,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:49:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:49:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-21 18:49:15,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49223946784922396 [2024-06-21 18:49:15,606 INFO L175 Difference]: Start difference. First operand has 373 places, 778 transitions, 14870 flow. Second operand 11 states and 222 transitions. [2024-06-21 18:49:15,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 850 transitions, 18109 flow [2024-06-21 18:49:18,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 850 transitions, 17529 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-21 18:49:18,485 INFO L231 Difference]: Finished difference. Result has 377 places, 784 transitions, 15134 flow [2024-06-21 18:49:18,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14290, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15134, PETRI_PLACES=377, PETRI_TRANSITIONS=784} [2024-06-21 18:49:18,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-21 18:49:18,486 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 784 transitions, 15134 flow [2024-06-21 18:49:18,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:18,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:18,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:18,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:49:18,487 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:18,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1832228062, now seen corresponding path program 5 times [2024-06-21 18:49:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:18,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062835179] [2024-06-21 18:49:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:18,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:20,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:20,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062835179] [2024-06-21 18:49:20,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062835179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:20,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:20,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:49:20,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174824828] [2024-06-21 18:49:20,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:20,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:49:20,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:20,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:49:20,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:49:20,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:49:20,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 784 transitions, 15134 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:20,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:20,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:49:20,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:23,989 INFO L124 PetriNetUnfolderBase]: 6052/9131 cut-off events. [2024-06-21 18:49:23,990 INFO L125 PetriNetUnfolderBase]: For 1796326/1796329 co-relation queries the response was YES. [2024-06-21 18:49:24,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120238 conditions, 9131 events. 6052/9131 cut-off events. For 1796326/1796329 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 53829 event pairs, 1608 based on Foata normal form. 36/9166 useless extension candidates. Maximal degree in co-relation 120063. Up to 7412 conditions per place. [2024-06-21 18:49:24,136 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 651 selfloop transitions, 189 changer transitions 0/843 dead transitions. [2024-06-21 18:49:24,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 843 transitions, 18229 flow [2024-06-21 18:49:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 18:49:24,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-21 18:49:24,138 INFO L175 Difference]: Start difference. First operand has 377 places, 784 transitions, 15134 flow. Second operand 9 states and 190 transitions. [2024-06-21 18:49:24,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 843 transitions, 18229 flow [2024-06-21 18:49:27,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 843 transitions, 17720 flow, removed 105 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:27,703 INFO L231 Difference]: Finished difference. Result has 380 places, 788 transitions, 15297 flow [2024-06-21 18:49:27,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14625, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15297, PETRI_PLACES=380, PETRI_TRANSITIONS=788} [2024-06-21 18:49:27,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-21 18:49:27,704 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 788 transitions, 15297 flow [2024-06-21 18:49:27,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:27,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:49:27,705 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:27,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1837035604, now seen corresponding path program 1 times [2024-06-21 18:49:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:27,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854508243] [2024-06-21 18:49:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:27,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:29,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854508243] [2024-06-21 18:49:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854508243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:29,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:29,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:49:29,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519203833] [2024-06-21 18:49:29,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:29,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:49:29,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:29,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:49:29,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:49:29,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:29,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 788 transitions, 15297 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:29,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:29,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:29,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:33,124 INFO L124 PetriNetUnfolderBase]: 6091/9202 cut-off events. [2024-06-21 18:49:33,124 INFO L125 PetriNetUnfolderBase]: For 1714916/1714919 co-relation queries the response was YES. [2024-06-21 18:49:33,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120395 conditions, 9202 events. 6091/9202 cut-off events. For 1714916/1714919 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 54596 event pairs, 1724 based on Foata normal form. 10/9211 useless extension candidates. Maximal degree in co-relation 120218. Up to 8556 conditions per place. [2024-06-21 18:49:33,287 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 652 selfloop transitions, 187 changer transitions 0/842 dead transitions. [2024-06-21 18:49:33,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 842 transitions, 18040 flow [2024-06-21 18:49:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:49:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:49:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 18:49:33,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-21 18:49:33,289 INFO L175 Difference]: Start difference. First operand has 380 places, 788 transitions, 15297 flow. Second operand 11 states and 208 transitions. [2024-06-21 18:49:33,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 842 transitions, 18040 flow [2024-06-21 18:49:36,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 842 transitions, 17387 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:36,659 INFO L231 Difference]: Finished difference. Result has 384 places, 792 transitions, 15239 flow [2024-06-21 18:49:36,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14644, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15239, PETRI_PLACES=384, PETRI_TRANSITIONS=792} [2024-06-21 18:49:36,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-21 18:49:36,660 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 792 transitions, 15239 flow [2024-06-21 18:49:36,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:36,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:36,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:36,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:49:36,662 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:36,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1831136242, now seen corresponding path program 6 times [2024-06-21 18:49:36,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:36,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198781780] [2024-06-21 18:49:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:36,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:38,590 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 18:49:38,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:38,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198781780] [2024-06-21 18:49:38,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198781780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:38,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:38,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:49:38,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931504718] [2024-06-21 18:49:38,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:38,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:49:38,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:38,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:49:38,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:49:38,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:49:38,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 792 transitions, 15239 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:38,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:38,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:49:38,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:42,286 INFO L124 PetriNetUnfolderBase]: 6275/9515 cut-off events. [2024-06-21 18:49:42,286 INFO L125 PetriNetUnfolderBase]: For 1894292/1894295 co-relation queries the response was YES. [2024-06-21 18:49:42,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122621 conditions, 9515 events. 6275/9515 cut-off events. For 1894292/1894295 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 57131 event pairs, 1766 based on Foata normal form. 44/9558 useless extension candidates. Maximal degree in co-relation 122444. Up to 8304 conditions per place. [2024-06-21 18:49:42,573 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 652 selfloop transitions, 188 changer transitions 0/843 dead transitions. [2024-06-21 18:49:42,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 843 transitions, 17847 flow [2024-06-21 18:49:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 18:49:42,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-21 18:49:42,574 INFO L175 Difference]: Start difference. First operand has 384 places, 792 transitions, 15239 flow. Second operand 9 states and 186 transitions. [2024-06-21 18:49:42,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 843 transitions, 17847 flow [2024-06-21 18:49:45,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 843 transitions, 17336 flow, removed 92 selfloop flow, removed 8 redundant places. [2024-06-21 18:49:45,712 INFO L231 Difference]: Finished difference. Result has 385 places, 795 transitions, 15333 flow [2024-06-21 18:49:45,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14728, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15333, PETRI_PLACES=385, PETRI_TRANSITIONS=795} [2024-06-21 18:49:45,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-21 18:49:45,713 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 795 transitions, 15333 flow [2024-06-21 18:49:45,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:45,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:45,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:45,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:49:45,714 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:45,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1836851092, now seen corresponding path program 7 times [2024-06-21 18:49:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:45,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016728857] [2024-06-21 18:49:45,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:45,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:47,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:47,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016728857] [2024-06-21 18:49:47,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016728857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:47,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:47,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:49:47,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372508109] [2024-06-21 18:49:47,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:47,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:49:47,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:49:47,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:49:47,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:49:47,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 795 transitions, 15333 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:47,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:47,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:49:47,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:49:51,142 INFO L124 PetriNetUnfolderBase]: 6265/9499 cut-off events. [2024-06-21 18:49:51,143 INFO L125 PetriNetUnfolderBase]: For 1795787/1795790 co-relation queries the response was YES. [2024-06-21 18:49:51,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120051 conditions, 9499 events. 6265/9499 cut-off events. For 1795787/1795790 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 56837 event pairs, 1741 based on Foata normal form. 42/9540 useless extension candidates. Maximal degree in co-relation 119873. Up to 8506 conditions per place. [2024-06-21 18:49:51,294 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 642 selfloop transitions, 196 changer transitions 0/841 dead transitions. [2024-06-21 18:49:51,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 841 transitions, 17698 flow [2024-06-21 18:49:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:49:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:49:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 18:49:51,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-21 18:49:51,296 INFO L175 Difference]: Start difference. First operand has 385 places, 795 transitions, 15333 flow. Second operand 9 states and 184 transitions. [2024-06-21 18:49:51,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 841 transitions, 17698 flow [2024-06-21 18:49:54,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 841 transitions, 17191 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-21 18:49:54,999 INFO L231 Difference]: Finished difference. Result has 387 places, 797 transitions, 15401 flow [2024-06-21 18:49:54,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14826, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15401, PETRI_PLACES=387, PETRI_TRANSITIONS=797} [2024-06-21 18:49:55,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-21 18:49:55,000 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 797 transitions, 15401 flow [2024-06-21 18:49:55,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:55,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:49:55,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:49:55,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:49:55,000 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:49:55,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:49:55,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1404191366, now seen corresponding path program 2 times [2024-06-21 18:49:55,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:49:55,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903189401] [2024-06-21 18:49:55,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:49:55,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:49:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:49:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:49:56,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:49:56,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903189401] [2024-06-21 18:49:56,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903189401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:49:56,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:49:56,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:49:56,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929207571] [2024-06-21 18:49:56,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:49:56,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:49:56,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:49:56,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:49:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:49:57,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:49:57,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 797 transitions, 15401 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:49:57,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:49:57,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:49:57,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:00,596 INFO L124 PetriNetUnfolderBase]: 6326/9590 cut-off events. [2024-06-21 18:50:00,596 INFO L125 PetriNetUnfolderBase]: For 1715754/1715763 co-relation queries the response was YES. [2024-06-21 18:50:00,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119393 conditions, 9590 events. 6326/9590 cut-off events. For 1715754/1715763 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 57496 event pairs, 1543 based on Foata normal form. 14/9603 useless extension candidates. Maximal degree in co-relation 119214. Up to 9116 conditions per place. [2024-06-21 18:50:00,785 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 703 selfloop transitions, 130 changer transitions 0/836 dead transitions. [2024-06-21 18:50:00,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 836 transitions, 17611 flow [2024-06-21 18:50:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:00,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 18:50:00,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:50:00,786 INFO L175 Difference]: Start difference. First operand has 387 places, 797 transitions, 15401 flow. Second operand 10 states and 180 transitions. [2024-06-21 18:50:00,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 836 transitions, 17611 flow [2024-06-21 18:50:04,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 836 transitions, 17099 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 18:50:04,280 INFO L231 Difference]: Finished difference. Result has 390 places, 804 transitions, 15409 flow [2024-06-21 18:50:04,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14889, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15409, PETRI_PLACES=390, PETRI_TRANSITIONS=804} [2024-06-21 18:50:04,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-21 18:50:04,281 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 804 transitions, 15409 flow [2024-06-21 18:50:04,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:04,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:50:04,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:50:04,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:50:04,281 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:50:04,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:50:04,282 INFO L85 PathProgramCache]: Analyzing trace with hash 535778132, now seen corresponding path program 3 times [2024-06-21 18:50:04,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:50:04,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49903769] [2024-06-21 18:50:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:50:04,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:50:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:50:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:50:06,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:50:06,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49903769] [2024-06-21 18:50:06,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49903769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:50:06,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:50:06,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:50:06,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181432222] [2024-06-21 18:50:06,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:50:06,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:50:06,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:50:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:50:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:50:06,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 18:50:06,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 804 transitions, 15409 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:50:06,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:50:06,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 18:50:06,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:50:10,030 INFO L124 PetriNetUnfolderBase]: 6354/9639 cut-off events. [2024-06-21 18:50:10,030 INFO L125 PetriNetUnfolderBase]: For 1681325/1681334 co-relation queries the response was YES. [2024-06-21 18:50:10,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118096 conditions, 9639 events. 6354/9639 cut-off events. For 1681325/1681334 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 57912 event pairs, 1538 based on Foata normal form. 12/9648 useless extension candidates. Maximal degree in co-relation 117915. Up to 8090 conditions per place. [2024-06-21 18:50:10,175 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 527 selfloop transitions, 335 changer transitions 0/865 dead transitions. [2024-06-21 18:50:10,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 865 transitions, 18488 flow [2024-06-21 18:50:10,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:50:10,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:50:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 18:50:10,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-21 18:50:10,176 INFO L175 Difference]: Start difference. First operand has 390 places, 804 transitions, 15409 flow. Second operand 10 states and 193 transitions. [2024-06-21 18:50:10,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 865 transitions, 18488 flow