./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 18:57:52,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 18:57:52,381 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 18:57:52,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 18:57:52,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 18:57:52,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 18:57:52,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 18:57:52,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 18:57:52,416 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 18:57:52,420 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 18:57:52,420 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 18:57:52,420 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 18:57:52,421 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 18:57:52,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 18:57:52,423 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 18:57:52,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 18:57:52,423 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 18:57:52,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 18:57:52,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 18:57:52,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 18:57:52,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 18:57:52,425 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 18:57:52,425 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 18:57:52,425 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 18:57:52,426 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 18:57:52,426 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 18:57:52,426 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 18:57:52,426 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 18:57:52,427 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 18:57:52,427 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 18:57:52,428 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 18:57:52,428 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 18:57:52,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:57:52,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 18:57:52,429 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 18:57:52,429 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 18:57:52,429 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 18:57:52,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 18:57:52,430 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 18:57:52,430 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 18:57:52,430 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 18:57:52,430 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 18:57:52,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 18:57:52,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 18:57:52,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 18:57:52,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 18:57:52,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 18:57:52,713 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 18:57:52,713 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 18:57:52,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 18:57:53,890 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 18:57:54,112 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 18:57:54,113 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 18:57:54,127 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d49be27c/d135254c4b94420d8be8b21bf68d0050/FLAGa9056cd24 [2024-06-21 18:57:54,140 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d49be27c/d135254c4b94420d8be8b21bf68d0050 [2024-06-21 18:57:54,143 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 18:57:54,143 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 18:57:54,144 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix038_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 18:57:54,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 18:57:54,216 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 18:57:54,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 18:57:54,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 18:57:54,221 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 18:57:54,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:57:54" (1/2) ... [2024-06-21 18:57:54,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da62231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:57:54, skipping insertion in model container [2024-06-21 18:57:54,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 06:57:54" (1/2) ... [2024-06-21 18:57:54,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6fb56627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 06:57:54, skipping insertion in model container [2024-06-21 18:57:54,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:57:54" (2/2) ... [2024-06-21 18:57:54,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da62231 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:57:54, skipping insertion in model container [2024-06-21 18:57:54,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:57:54" (2/2) ... [2024-06-21 18:57:54,225 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 18:57:54,245 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 18:57:54,246 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a$mem_tmp >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff1 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$w_buff0) + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )a + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a + (long long )a$w_buff0 >= 0LL) && (long long )a + (long long )a$w_buff0_used >= 0LL) && (long long )a$flush_delayed + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$mem_tmp + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )x >= 0LL) && (long long )a$r_buff0_thd1 + (long long )y >= 0LL) && (long long )a$r_buff0_thd1 + (long long )z >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice2 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0 + (long long )x >= 0LL) && (long long )a$w_buff0 + (long long )y >= 0LL) && (long long )a$w_buff0 + (long long )z >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice2 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0_used + (long long )x >= 0LL) && (long long )a$w_buff0_used + (long long )y >= 0LL) && (long long )a$w_buff0_used + (long long )z >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )a$w_buff0_used) - (long long )a$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )a$mem_tmp >= 0LL) && (long long )a - (long long )a$mem_tmp >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff1 - (long long )a$w_buff1_used >= 0LL) [2024-06-21 18:57:54,246 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a$mem_tmp >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff1 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$w_buff0) + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )a + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a + (long long )a$w_buff0 >= 0LL) && (long long )a + (long long )a$w_buff0_used >= 0LL) && (long long )a$flush_delayed + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$mem_tmp + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )x >= 0LL) && (long long )a$r_buff0_thd1 + (long long )y >= 0LL) && (long long )a$r_buff0_thd1 + (long long )z >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice2 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0 + (long long )x >= 0LL) && (long long )a$w_buff0 + (long long )y >= 0LL) && (long long )a$w_buff0 + (long long )z >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice2 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0_used + (long long )x >= 0LL) && (long long )a$w_buff0_used + (long long )y >= 0LL) && (long long )a$w_buff0_used + (long long )z >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )a$w_buff0_used) - (long long )a$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )a$mem_tmp >= 0LL) && (long long )a - (long long )a$mem_tmp >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff1 - (long long )a$w_buff1_used >= 0LL) [2024-06-21 18:57:54,247 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )a$mem_tmp >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$flush_delayed) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$r_buff0_thd1 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff0_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd0) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff1 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd2) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$r_buff1_thd3) + (long long )a$w_buff0_used >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0 >= 0LL) && (0LL - (long long )a$read_delayed) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff0_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$r_buff1_thd1) + (long long )a$w_buff0_used >= 0LL) && (1LL - (long long )a$w_buff0) + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_cnt + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a$w_buff0_used >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$r_buff0_thd1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )a$w_buff0_used >= 0LL) && (long long )a + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a + (long long )a$w_buff0 >= 0LL) && (long long )a + (long long )a$w_buff0_used >= 0LL) && (long long )a$flush_delayed + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$flush_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$mem_tmp + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0 >= 0LL) && (long long )a$mem_tmp + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$r_buff0_thd1 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff0_thd1 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )x >= 0LL) && (long long )a$r_buff0_thd1 + (long long )y >= 0LL) && (long long )a$r_buff0_thd1 + (long long )z >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice0 >= 0LL) && (long long )a$r_buff0_thd1 + (long long )weak$$choice2 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd1 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd2 + (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff1_thd3 + (long long )a$w_buff0_used >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0 >= 0LL) && (long long )a$read_delayed + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0 + (long long )x >= 0LL) && (long long )a$w_buff0 + (long long )y >= 0LL) && (long long )a$w_buff0 + (long long )z >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0 + (long long )weak$$choice2 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0_used + (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used + (long long )main$tmp_guard1 >= 0LL) && (long long )a$w_buff0_used + (long long )x >= 0LL) && (long long )a$w_buff0_used + (long long )y >= 0LL) && (long long )a$w_buff0_used + (long long )z >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice0 >= 0LL) && (long long )a$w_buff0_used + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )a$w_buff0_used) - (long long )a$w_buff1 >= 0LL) && (long long )__unbuffered_p2_EBX - (long long )a$mem_tmp >= 0LL) && (long long )a - (long long )a$mem_tmp >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff0_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd2 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$r_buff1_thd3 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$read_delayed >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff0_used >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff0_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1 >= 0LL) && (long long )a$r_buff1_thd1 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff0_used >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1 >= 0LL) && (long long )a$w_buff0 - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff0_used - (long long )a$w_buff1_used >= 0LL) && (long long )a$w_buff1 - (long long )a$w_buff1_used >= 0LL) [2024-06-21 18:57:54,247 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 18:57:54,247 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-21 18:57:54,277 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 18:57:54,656 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:57:54,668 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 18:57:54,887 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 18:57:54,940 INFO L206 MainTranslator]: Completed translation [2024-06-21 18:57:54,940 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 06:57:54 WrapperNode [2024-06-21 18:57:54,940 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 18:57:54,942 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 18:57:54,942 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 18:57:54,942 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 18:57:54,948 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 06:57:54" (1/1) ... [2024-06-21 18:57:54,984 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,042 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-21 18:57:55,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 18:57:55,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 18:57:55,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 18:57:55,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 18:57:55,055 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,056 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,079 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,101 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 18:57:55,106 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,109 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,126 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,128 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,132 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,136 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 18:57:55,148 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 18:57:55,148 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 18:57:55,148 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 18:57:55,149 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 06:57:54" (1/1) ... [2024-06-21 18:57:55,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 18:57:55,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 18:57:55,179 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 18:57:55,188 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 18:57:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 18:57:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 18:57:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 18:57:55,216 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 18:57:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 18:57:55,216 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 18:57:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 18:57:55,217 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 18:57:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 18:57:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 18:57:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 18:57:55,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 18:57:55,219 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 18:57:55,385 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 18:57:55,387 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 18:57:56,042 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 18:57:56,043 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 18:57:56,257 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 18:57:56,258 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 18:57:56,258 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:57:56 BoogieIcfgContainer [2024-06-21 18:57:56,258 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 18:57:56,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 18:57:56,260 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 18:57:56,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 18:57:56,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 06:57:54" (1/4) ... [2024-06-21 18:57:56,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b01156c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 06:57:56, skipping insertion in model container [2024-06-21 18:57:56,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 06:57:54" (2/4) ... [2024-06-21 18:57:56,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b01156c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:57:56, skipping insertion in model container [2024-06-21 18:57:56,264 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 06:57:54" (3/4) ... [2024-06-21 18:57:56,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b01156c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 06:57:56, skipping insertion in model container [2024-06-21 18:57:56,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 06:57:56" (4/4) ... [2024-06-21 18:57:56,266 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 18:57:56,283 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 18:57:56,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 18:57:56,283 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 18:57:56,334 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 18:57:56,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 18:57:56,396 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 18:57:56,396 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:57:56,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 18:57:56,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 18:57:56,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 18:57:56,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 18:57:56,424 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;@6c9b6d92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 18:57:56,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 18:57:56,433 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 18:57:56,434 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 18:57:56,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 18:57:56,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:56,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 18:57:56,435 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 18:57:56,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash 377005303, now seen corresponding path program 1 times [2024-06-21 18:57:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:56,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914779842] [2024-06-21 18:57:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:56,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:57:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:57:58,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:57:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914779842] [2024-06-21 18:57:58,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914779842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:57:58,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:57:58,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 18:57:58,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602260277] [2024-06-21 18:57:58,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:57:58,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 18:57:58,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:57:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 18:57:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 18:57:58,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:57:58,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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 18:57:58,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:57:58,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:57:58,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:57:58,981 INFO L124 PetriNetUnfolderBase]: 1570/2419 cut-off events. [2024-06-21 18:57:58,981 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 18:57:58,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4840 conditions, 2419 events. 1570/2419 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11765 event pairs, 1123 based on Foata normal form. 1/2344 useless extension candidates. Maximal degree in co-relation 4828. Up to 2334 conditions per place. [2024-06-21 18:57:59,003 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 18:57:59,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-21 18:57:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 18:57:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 18:57:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-21 18:57:59,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-21 18:57:59,017 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-21 18:57:59,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-21 18:57:59,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 18:57:59,024 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 18:57:59,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 18:57:59,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 18:57:59,029 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 18:57:59,029 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 18:57:59,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:57:59,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:57:59,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 18:57:59,030 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 18:57:59,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:57:59,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958000, now seen corresponding path program 1 times [2024-06-21 18:57:59,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:57:59,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791528466] [2024-06-21 18:57:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:57:59,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:57:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:00,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791528466] [2024-06-21 18:58:00,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791528466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:00,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:00,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 18:58:00,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572604505] [2024-06-21 18:58:00,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:00,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 18:58:00,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 18:58:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 18:58:00,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:58:00,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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 18:58:00,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:00,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:58:00,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:01,046 INFO L124 PetriNetUnfolderBase]: 1564/2415 cut-off events. [2024-06-21 18:58:01,047 INFO L125 PetriNetUnfolderBase]: For 445/445 co-relation queries the response was YES. [2024-06-21 18:58:01,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5442 conditions, 2415 events. 1564/2415 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11736 event pairs, 981 based on Foata normal form. 3/2381 useless extension candidates. Maximal degree in co-relation 5430. Up to 2310 conditions per place. [2024-06-21 18:58:01,064 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 18:58:01,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-21 18:58:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 18:58:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 18:58:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-21 18:58:01,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 18:58:01,067 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-21 18:58:01,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-21 18:58:01,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 18:58:01,069 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 18:58:01,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 18:58:01,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 18:58:01,070 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 18:58:01,070 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 18:58:01,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:01,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 18:58:01,071 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 18:58:01,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash 29058686, now seen corresponding path program 1 times [2024-06-21 18:58:01,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:01,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933901573] [2024-06-21 18:58:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:02,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:02,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933901573] [2024-06-21 18:58:02,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933901573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:02,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:02,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:58:02,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379850871] [2024-06-21 18:58:02,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:02,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:58:02,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:58:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:58:02,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:58:02,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:02,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:02,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:58:02,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:03,119 INFO L124 PetriNetUnfolderBase]: 1618/2518 cut-off events. [2024-06-21 18:58:03,119 INFO L125 PetriNetUnfolderBase]: For 1322/1322 co-relation queries the response was YES. [2024-06-21 18:58:03,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6269 conditions, 2518 events. 1618/2518 cut-off events. For 1322/1322 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12392 event pairs, 739 based on Foata normal form. 7/2510 useless extension candidates. Maximal degree in co-relation 6255. Up to 2279 conditions per place. [2024-06-21 18:58:03,136 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 18:58:03,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 404 flow [2024-06-21 18:58:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:58:03,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:58:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 18:58:03,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 18:58:03,143 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 130 transitions. [2024-06-21 18:58:03,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 404 flow [2024-06-21 18:58:03,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 18:58:03,147 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 239 flow [2024-06-21 18:58:03,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 18:58:03,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 18:58:03,149 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 239 flow [2024-06-21 18:58:03,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:03,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:03,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:03,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 18:58:03,151 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 18:58:03,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash 817703349, now seen corresponding path program 1 times [2024-06-21 18:58:03,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:03,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570925792] [2024-06-21 18:58:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:03,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:04,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:04,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570925792] [2024-06-21 18:58:04,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570925792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:04,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:04,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:58:04,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173992197] [2024-06-21 18:58:04,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:04,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:58:04,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:04,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:58:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:58:04,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:58:04,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:04,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:04,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:58:04,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:05,635 INFO L124 PetriNetUnfolderBase]: 1640/2541 cut-off events. [2024-06-21 18:58:05,635 INFO L125 PetriNetUnfolderBase]: For 3272/3272 co-relation queries the response was YES. [2024-06-21 18:58:05,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7658 conditions, 2541 events. 1640/2541 cut-off events. For 3272/3272 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12674 event pairs, 559 based on Foata normal form. 7/2538 useless extension candidates. Maximal degree in co-relation 7641. Up to 2222 conditions per place. [2024-06-21 18:58:05,656 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2024-06-21 18:58:05,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 100 transitions, 633 flow [2024-06-21 18:58:05,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:58:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:58:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 18:58:05,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 18:58:05,659 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 239 flow. Second operand 6 states and 157 transitions. [2024-06-21 18:58:05,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 100 transitions, 633 flow [2024-06-21 18:58:05,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 100 transitions, 625 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 18:58:05,668 INFO L231 Difference]: Finished difference. Result has 60 places, 63 transitions, 418 flow [2024-06-21 18:58:05,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=60, PETRI_TRANSITIONS=63} [2024-06-21 18:58:05,670 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-21 18:58:05,670 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 63 transitions, 418 flow [2024-06-21 18:58:05,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:05,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:05,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:05,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 18:58:05,671 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:05,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:05,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2139342659, now seen corresponding path program 1 times [2024-06-21 18:58:05,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:05,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877880931] [2024-06-21 18:58:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:05,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:07,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:07,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877880931] [2024-06-21 18:58:07,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877880931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:07,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:07,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:58:07,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123469362] [2024-06-21 18:58:07,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:07,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:58:07,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:07,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:58:07,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:58:07,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 18:58:07,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 63 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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 18:58:07,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:07,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 18:58:07,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:08,494 INFO L124 PetriNetUnfolderBase]: 1722/2703 cut-off events. [2024-06-21 18:58:08,495 INFO L125 PetriNetUnfolderBase]: For 6407/6407 co-relation queries the response was YES. [2024-06-21 18:58:08,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9511 conditions, 2703 events. 1722/2703 cut-off events. For 6407/6407 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13849 event pairs, 410 based on Foata normal form. 26/2717 useless extension candidates. Maximal degree in co-relation 9488. Up to 2186 conditions per place. [2024-06-21 18:58:08,518 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2024-06-21 18:58:08,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 808 flow [2024-06-21 18:58:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:58:08,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:58:08,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 18:58:08,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 18:58:08,521 INFO L175 Difference]: Start difference. First operand has 60 places, 63 transitions, 418 flow. Second operand 7 states and 179 transitions. [2024-06-21 18:58:08,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 808 flow [2024-06-21 18:58:08,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 792 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-21 18:58:08,532 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 484 flow [2024-06-21 18:58:08,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=484, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-21 18:58:08,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 18:58:08,535 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 484 flow [2024-06-21 18:58:08,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 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 18:58:08,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:08,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:08,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 18:58:08,541 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 18:58:08,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:08,541 INFO L85 PathProgramCache]: Analyzing trace with hash -856778795, now seen corresponding path program 1 times [2024-06-21 18:58:08,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:08,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285252409] [2024-06-21 18:58:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:08,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:10,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:10,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285252409] [2024-06-21 18:58:10,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285252409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:10,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:10,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:58:10,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510305728] [2024-06-21 18:58:10,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:10,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:58:10,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:58:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:58:10,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:10,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 484 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:10,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:10,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:10,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:11,289 INFO L124 PetriNetUnfolderBase]: 1712/2689 cut-off events. [2024-06-21 18:58:11,290 INFO L125 PetriNetUnfolderBase]: For 8708/8708 co-relation queries the response was YES. [2024-06-21 18:58:11,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9971 conditions, 2689 events. 1712/2689 cut-off events. For 8708/8708 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13835 event pairs, 928 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 9944. Up to 2551 conditions per place. [2024-06-21 18:58:11,308 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 18:58:11,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 76 transitions, 670 flow [2024-06-21 18:58:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:58:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:58:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-21 18:58:11,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 18:58:11,310 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 484 flow. Second operand 5 states and 98 transitions. [2024-06-21 18:58:11,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 76 transitions, 670 flow [2024-06-21 18:58:11,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 598 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 18:58:11,318 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 469 flow [2024-06-21 18:58:11,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=469, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-21 18:58:11,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-21 18:58:11,319 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 469 flow [2024-06-21 18:58:11,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:11,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:11,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:11,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 18:58:11,319 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 18:58:11,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash 886125884, now seen corresponding path program 1 times [2024-06-21 18:58:11,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:11,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269115654] [2024-06-21 18:58:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:11,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:13,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:13,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269115654] [2024-06-21 18:58:13,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269115654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:13,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:13,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:58:13,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376846629] [2024-06-21 18:58:13,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:13,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:58:13,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:13,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:58:13,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:58:13,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:13,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:13,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:13,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:13,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:14,243 INFO L124 PetriNetUnfolderBase]: 1791/2820 cut-off events. [2024-06-21 18:58:14,243 INFO L125 PetriNetUnfolderBase]: For 9286/9294 co-relation queries the response was YES. [2024-06-21 18:58:14,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10510 conditions, 2820 events. 1791/2820 cut-off events. For 9286/9294 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14459 event pairs, 566 based on Foata normal form. 12/2820 useless extension candidates. Maximal degree in co-relation 10480. Up to 2554 conditions per place. [2024-06-21 18:58:14,260 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 78 selfloop transitions, 28 changer transitions 0/111 dead transitions. [2024-06-21 18:58:14,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 961 flow [2024-06-21 18:58:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:58:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:58:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 18:58:14,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-21 18:58:14,262 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 469 flow. Second operand 7 states and 143 transitions. [2024-06-21 18:58:14,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 961 flow [2024-06-21 18:58:14,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 930 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:58:14,271 INFO L231 Difference]: Finished difference. Result has 73 places, 85 transitions, 694 flow [2024-06-21 18:58:14,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=73, PETRI_TRANSITIONS=85} [2024-06-21 18:58:14,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 18:58:14,272 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 85 transitions, 694 flow [2024-06-21 18:58:14,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:14,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:14,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:14,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 18:58:14,273 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 18:58:14,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:14,273 INFO L85 PathProgramCache]: Analyzing trace with hash 347547538, now seen corresponding path program 2 times [2024-06-21 18:58:14,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:14,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898549110] [2024-06-21 18:58:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:14,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:16,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:16,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898549110] [2024-06-21 18:58:16,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898549110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:16,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:16,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:58:16,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47677103] [2024-06-21 18:58:16,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:58:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:58:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:58:16,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:16,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 85 transitions, 694 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:16,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:16,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:16,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:16,747 INFO L124 PetriNetUnfolderBase]: 1888/2961 cut-off events. [2024-06-21 18:58:16,748 INFO L125 PetriNetUnfolderBase]: For 12754/12754 co-relation queries the response was YES. [2024-06-21 18:58:16,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12122 conditions, 2961 events. 1888/2961 cut-off events. For 12754/12754 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15216 event pairs, 876 based on Foata normal form. 10/2953 useless extension candidates. Maximal degree in co-relation 12089. Up to 2639 conditions per place. [2024-06-21 18:58:16,766 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 87 selfloop transitions, 37 changer transitions 0/129 dead transitions. [2024-06-21 18:58:16,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 1319 flow [2024-06-21 18:58:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:58:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:58:16,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 18:58:16,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 18:58:16,774 INFO L175 Difference]: Start difference. First operand has 73 places, 85 transitions, 694 flow. Second operand 6 states and 123 transitions. [2024-06-21 18:58:16,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 1319 flow [2024-06-21 18:58:16,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 129 transitions, 1282 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 18:58:16,793 INFO L231 Difference]: Finished difference. Result has 78 places, 105 transitions, 1050 flow [2024-06-21 18:58:16,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1050, PETRI_PLACES=78, PETRI_TRANSITIONS=105} [2024-06-21 18:58:16,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-21 18:58:16,795 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 105 transitions, 1050 flow [2024-06-21 18:58:16,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:16,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:16,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:16,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 18:58:16,796 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 18:58:16,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:16,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1270084288, now seen corresponding path program 3 times [2024-06-21 18:58:16,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:16,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969185742] [2024-06-21 18:58:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:16,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:18,361 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 18:58:18,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:18,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969185742] [2024-06-21 18:58:18,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969185742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:18,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:18,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:58:18,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161898436] [2024-06-21 18:58:18,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:18,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:58:18,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:18,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:58:18,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:58:18,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:18,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 105 transitions, 1050 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:18,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:18,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:18,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:19,130 INFO L124 PetriNetUnfolderBase]: 1860/2918 cut-off events. [2024-06-21 18:58:19,130 INFO L125 PetriNetUnfolderBase]: For 14872/14872 co-relation queries the response was YES. [2024-06-21 18:58:19,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12372 conditions, 2918 events. 1860/2918 cut-off events. For 14872/14872 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14924 event pairs, 880 based on Foata normal form. 5/2906 useless extension candidates. Maximal degree in co-relation 12336. Up to 2749 conditions per place. [2024-06-21 18:58:19,155 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 103 selfloop transitions, 15 changer transitions 0/123 dead transitions. [2024-06-21 18:58:19,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 123 transitions, 1360 flow [2024-06-21 18:58:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:58:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:58:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 18:58:19,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 18:58:19,157 INFO L175 Difference]: Start difference. First operand has 78 places, 105 transitions, 1050 flow. Second operand 6 states and 115 transitions. [2024-06-21 18:58:19,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 123 transitions, 1360 flow [2024-06-21 18:58:19,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 123 transitions, 1337 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 18:58:19,181 INFO L231 Difference]: Finished difference. Result has 83 places, 106 transitions, 1085 flow [2024-06-21 18:58:19,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1085, PETRI_PLACES=83, PETRI_TRANSITIONS=106} [2024-06-21 18:58:19,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 18:58:19,182 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 106 transitions, 1085 flow [2024-06-21 18:58:19,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:19,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:19,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:19,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 18:58:19,183 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 18:58:19,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1933549244, now seen corresponding path program 1 times [2024-06-21 18:58:19,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:19,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087698694] [2024-06-21 18:58:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:19,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:22,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:22,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087698694] [2024-06-21 18:58:22,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087698694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:22,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:22,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:58:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809399802] [2024-06-21 18:58:22,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:22,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:58:22,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:58:22,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:58:22,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:58:22,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 106 transitions, 1085 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 18:58:22,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:22,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:58:22,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:23,117 INFO L124 PetriNetUnfolderBase]: 2310/3556 cut-off events. [2024-06-21 18:58:23,118 INFO L125 PetriNetUnfolderBase]: For 20316/20316 co-relation queries the response was YES. [2024-06-21 18:58:23,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15254 conditions, 3556 events. 2310/3556 cut-off events. For 20316/20316 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17603 event pairs, 1119 based on Foata normal form. 4/3542 useless extension candidates. Maximal degree in co-relation 15215. Up to 3382 conditions per place. [2024-06-21 18:58:23,145 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 18 changer transitions 0/131 dead transitions. [2024-06-21 18:58:23,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1452 flow [2024-06-21 18:58:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:58:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:58:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 18:58:23,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 18:58:23,147 INFO L175 Difference]: Start difference. First operand has 83 places, 106 transitions, 1085 flow. Second operand 8 states and 136 transitions. [2024-06-21 18:58:23,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1452 flow [2024-06-21 18:58:23,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1409 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:58:23,174 INFO L231 Difference]: Finished difference. Result has 88 places, 112 transitions, 1157 flow [2024-06-21 18:58:23,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1157, PETRI_PLACES=88, PETRI_TRANSITIONS=112} [2024-06-21 18:58:23,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-21 18:58:23,175 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 112 transitions, 1157 flow [2024-06-21 18:58:23,175 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 18:58:23,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:23,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:23,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 18:58:23,176 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:23,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1517424716, now seen corresponding path program 1 times [2024-06-21 18:58:23,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:23,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661690764] [2024-06-21 18:58:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:23,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:24,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:24,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661690764] [2024-06-21 18:58:24,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661690764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:24,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:24,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 18:58:24,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499457259] [2024-06-21 18:58:24,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:24,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 18:58:24,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:24,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 18:58:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 18:58:24,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:58:24,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 112 transitions, 1157 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 18:58:24,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:24,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:58:24,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:25,594 INFO L124 PetriNetUnfolderBase]: 2307/3554 cut-off events. [2024-06-21 18:58:25,595 INFO L125 PetriNetUnfolderBase]: For 23001/23001 co-relation queries the response was YES. [2024-06-21 18:58:25,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15878 conditions, 3554 events. 2307/3554 cut-off events. For 23001/23001 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17553 event pairs, 1139 based on Foata normal form. 1/3554 useless extension candidates. Maximal degree in co-relation 15838. Up to 3425 conditions per place. [2024-06-21 18:58:25,622 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 108 selfloop transitions, 10 changer transitions 0/122 dead transitions. [2024-06-21 18:58:25,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 122 transitions, 1439 flow [2024-06-21 18:58:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 18:58:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 18:58:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 18:58:25,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 18:58:25,623 INFO L175 Difference]: Start difference. First operand has 88 places, 112 transitions, 1157 flow. Second operand 5 states and 89 transitions. [2024-06-21 18:58:25,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 122 transitions, 1439 flow [2024-06-21 18:58:25,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 122 transitions, 1392 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 18:58:25,644 INFO L231 Difference]: Finished difference. Result has 88 places, 115 transitions, 1166 flow [2024-06-21 18:58:25,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1166, PETRI_PLACES=88, PETRI_TRANSITIONS=115} [2024-06-21 18:58:25,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-21 18:58:25,645 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 115 transitions, 1166 flow [2024-06-21 18:58:25,645 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 18:58:25,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:25,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:25,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 18:58:25,645 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 18:58:25,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash 981653929, now seen corresponding path program 1 times [2024-06-21 18:58:25,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:25,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449799540] [2024-06-21 18:58:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:25,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:27,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:27,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449799540] [2024-06-21 18:58:27,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449799540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:27,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:27,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:58:27,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634379706] [2024-06-21 18:58:27,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:27,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:58:27,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:58:27,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:58:28,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:28,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 115 transitions, 1166 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:28,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:28,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:28,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:28,715 INFO L124 PetriNetUnfolderBase]: 2168/3380 cut-off events. [2024-06-21 18:58:28,715 INFO L125 PetriNetUnfolderBase]: For 24762/24807 co-relation queries the response was YES. [2024-06-21 18:58:28,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15420 conditions, 3380 events. 2168/3380 cut-off events. For 24762/24807 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17527 event pairs, 657 based on Foata normal form. 25/3395 useless extension candidates. Maximal degree in co-relation 15379. Up to 2757 conditions per place. [2024-06-21 18:58:28,738 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 60 changer transitions 0/150 dead transitions. [2024-06-21 18:58:28,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 150 transitions, 1686 flow [2024-06-21 18:58:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:58:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:58:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 18:58:28,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-21 18:58:28,740 INFO L175 Difference]: Start difference. First operand has 88 places, 115 transitions, 1166 flow. Second operand 6 states and 138 transitions. [2024-06-21 18:58:28,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 150 transitions, 1686 flow [2024-06-21 18:58:28,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 150 transitions, 1652 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 18:58:28,769 INFO L231 Difference]: Finished difference. Result has 91 places, 121 transitions, 1314 flow [2024-06-21 18:58:28,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1314, PETRI_PLACES=91, PETRI_TRANSITIONS=121} [2024-06-21 18:58:28,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-21 18:58:28,770 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 121 transitions, 1314 flow [2024-06-21 18:58:28,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:28,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:28,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:28,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 18:58:28,771 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 18:58:28,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:28,772 INFO L85 PathProgramCache]: Analyzing trace with hash 985376719, now seen corresponding path program 2 times [2024-06-21 18:58:28,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:28,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461687083] [2024-06-21 18:58:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:28,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:30,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:30,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461687083] [2024-06-21 18:58:30,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461687083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:30,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:30,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:58:30,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953722948] [2024-06-21 18:58:30,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:58:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:30,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:58:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:58:30,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:58:30,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 121 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:30,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:30,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:58:30,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:31,549 INFO L124 PetriNetUnfolderBase]: 2148/3360 cut-off events. [2024-06-21 18:58:31,549 INFO L125 PetriNetUnfolderBase]: For 28786/28811 co-relation queries the response was YES. [2024-06-21 18:58:31,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16119 conditions, 3360 events. 2148/3360 cut-off events. For 28786/28811 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17392 event pairs, 664 based on Foata normal form. 22/3374 useless extension candidates. Maximal degree in co-relation 16078. Up to 2839 conditions per place. [2024-06-21 18:58:31,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 79 selfloop transitions, 64 changer transitions 0/149 dead transitions. [2024-06-21 18:58:31,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1790 flow [2024-06-21 18:58:31,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:58:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:58:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 18:58:31,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-21 18:58:31,573 INFO L175 Difference]: Start difference. First operand has 91 places, 121 transitions, 1314 flow. Second operand 7 states and 152 transitions. [2024-06-21 18:58:31,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1790 flow [2024-06-21 18:58:31,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 149 transitions, 1705 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 18:58:31,606 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1370 flow [2024-06-21 18:58:31,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1370, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-06-21 18:58:31,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-21 18:58:31,607 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1370 flow [2024-06-21 18:58:31,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:58:31,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:31,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:31,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 18:58:31,608 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 18:58:31,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash 247420473, now seen corresponding path program 1 times [2024-06-21 18:58:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473799725] [2024-06-21 18:58:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:34,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:34,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473799725] [2024-06-21 18:58:34,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473799725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:34,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:34,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:58:34,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096069826] [2024-06-21 18:58:34,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:34,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:58:34,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:34,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:58:34,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:58:34,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:58:34,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 1370 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 18:58:34,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:34,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:58:34,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:35,069 INFO L124 PetriNetUnfolderBase]: 2354/3616 cut-off events. [2024-06-21 18:58:35,069 INFO L125 PetriNetUnfolderBase]: For 33922/33946 co-relation queries the response was YES. [2024-06-21 18:58:35,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18214 conditions, 3616 events. 2354/3616 cut-off events. For 33922/33946 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17849 event pairs, 675 based on Foata normal form. 22/3637 useless extension candidates. Maximal degree in co-relation 18170. Up to 3083 conditions per place. [2024-06-21 18:58:35,095 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 94 selfloop transitions, 73 changer transitions 0/171 dead transitions. [2024-06-21 18:58:35,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 171 transitions, 2147 flow [2024-06-21 18:58:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:58:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:58:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 18:58:35,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 18:58:35,101 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1370 flow. Second operand 8 states and 157 transitions. [2024-06-21 18:58:35,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 171 transitions, 2147 flow [2024-06-21 18:58:35,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1990 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 18:58:35,150 INFO L231 Difference]: Finished difference. Result has 101 places, 141 transitions, 1729 flow [2024-06-21 18:58:35,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1729, PETRI_PLACES=101, PETRI_TRANSITIONS=141} [2024-06-21 18:58:35,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 18:58:35,151 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 141 transitions, 1729 flow [2024-06-21 18:58:35,152 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 18:58:35,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:35,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:35,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 18:58:35,152 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 18:58:35,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:35,153 INFO L85 PathProgramCache]: Analyzing trace with hash 67604691, now seen corresponding path program 2 times [2024-06-21 18:58:35,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:35,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235961125] [2024-06-21 18:58:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:35,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:36,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:36,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235961125] [2024-06-21 18:58:36,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235961125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:36,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:36,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:58:36,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653003787] [2024-06-21 18:58:36,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:36,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:58:36,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:58:36,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:58:37,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:58:37,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 141 transitions, 1729 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 18:58:37,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:37,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:58:37,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:37,846 INFO L124 PetriNetUnfolderBase]: 2392/3675 cut-off events. [2024-06-21 18:58:37,846 INFO L125 PetriNetUnfolderBase]: For 38725/38725 co-relation queries the response was YES. [2024-06-21 18:58:37,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19229 conditions, 3675 events. 2392/3675 cut-off events. For 38725/38725 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18093 event pairs, 1090 based on Foata normal form. 2/3676 useless extension candidates. Maximal degree in co-relation 19182. Up to 3477 conditions per place. [2024-06-21 18:58:37,868 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 141 selfloop transitions, 26 changer transitions 0/171 dead transitions. [2024-06-21 18:58:37,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 171 transitions, 2285 flow [2024-06-21 18:58:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:58:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:58:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 18:58:37,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 18:58:37,873 INFO L175 Difference]: Start difference. First operand has 101 places, 141 transitions, 1729 flow. Second operand 7 states and 129 transitions. [2024-06-21 18:58:37,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 171 transitions, 2285 flow [2024-06-21 18:58:37,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 2175 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 18:58:37,928 INFO L231 Difference]: Finished difference. Result has 104 places, 148 transitions, 1821 flow [2024-06-21 18:58:37,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1821, PETRI_PLACES=104, PETRI_TRANSITIONS=148} [2024-06-21 18:58:37,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 18:58:37,929 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 148 transitions, 1821 flow [2024-06-21 18:58:37,929 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 18:58:37,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:37,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:37,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 18:58:37,930 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:37,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash -204472986, now seen corresponding path program 1 times [2024-06-21 18:58:37,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:37,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861160610] [2024-06-21 18:58:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:37,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:39,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:39,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861160610] [2024-06-21 18:58:39,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861160610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:39,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:39,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:58:39,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481538800] [2024-06-21 18:58:39,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:39,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:58:39,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:58:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:58:39,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 18:58:39,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 148 transitions, 1821 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 18:58:39,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:39,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 18:58:39,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:40,391 INFO L124 PetriNetUnfolderBase]: 2641/3943 cut-off events. [2024-06-21 18:58:40,391 INFO L125 PetriNetUnfolderBase]: For 46723/46723 co-relation queries the response was YES. [2024-06-21 18:58:40,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20938 conditions, 3943 events. 2641/3943 cut-off events. For 46723/46723 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18804 event pairs, 1204 based on Foata normal form. 1/3943 useless extension candidates. Maximal degree in co-relation 20890. Up to 3901 conditions per place. [2024-06-21 18:58:40,413 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 143 selfloop transitions, 13 changer transitions 0/159 dead transitions. [2024-06-21 18:58:40,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 159 transitions, 2187 flow [2024-06-21 18:58:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:58:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:58:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 18:58:40,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-21 18:58:40,415 INFO L175 Difference]: Start difference. First operand has 104 places, 148 transitions, 1821 flow. Second operand 6 states and 97 transitions. [2024-06-21 18:58:40,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 159 transitions, 2187 flow [2024-06-21 18:58:40,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 159 transitions, 2029 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 18:58:40,461 INFO L231 Difference]: Finished difference. Result has 103 places, 151 transitions, 1731 flow [2024-06-21 18:58:40,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1731, PETRI_PLACES=103, PETRI_TRANSITIONS=151} [2024-06-21 18:58:40,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-21 18:58:40,462 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 151 transitions, 1731 flow [2024-06-21 18:58:40,462 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 18:58:40,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:40,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 18:58:40,463 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 18:58:40,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash 393253421, now seen corresponding path program 1 times [2024-06-21 18:58:40,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506266400] [2024-06-21 18:58:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:42,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:42,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506266400] [2024-06-21 18:58:42,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506266400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:42,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:42,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:58:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834260467] [2024-06-21 18:58:42,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:42,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:58:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:42,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:58:42,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:58:42,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 18:58:42,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 151 transitions, 1731 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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 18:58:42,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:42,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 18:58:42,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:43,940 INFO L124 PetriNetUnfolderBase]: 2506/3925 cut-off events. [2024-06-21 18:58:43,941 INFO L125 PetriNetUnfolderBase]: For 53749/53797 co-relation queries the response was YES. [2024-06-21 18:58:43,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21190 conditions, 3925 events. 2506/3925 cut-off events. For 53749/53797 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20965 event pairs, 498 based on Foata normal form. 40/3951 useless extension candidates. Maximal degree in co-relation 21140. Up to 2734 conditions per place. [2024-06-21 18:58:43,962 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 78 changer transitions 0/196 dead transitions. [2024-06-21 18:58:43,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 196 transitions, 2385 flow [2024-06-21 18:58:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:58:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:58:43,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 18:58:43,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-21 18:58:43,964 INFO L175 Difference]: Start difference. First operand has 103 places, 151 transitions, 1731 flow. Second operand 8 states and 167 transitions. [2024-06-21 18:58:43,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 196 transitions, 2385 flow [2024-06-21 18:58:44,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 196 transitions, 2351 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 18:58:44,014 INFO L231 Difference]: Finished difference. Result has 109 places, 157 transitions, 1966 flow [2024-06-21 18:58:44,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1966, PETRI_PLACES=109, PETRI_TRANSITIONS=157} [2024-06-21 18:58:44,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 18:58:44,015 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 157 transitions, 1966 flow [2024-06-21 18:58:44,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 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 18:58:44,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:44,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:44,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 18:58:44,016 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 18:58:44,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash 452300051, now seen corresponding path program 2 times [2024-06-21 18:58:44,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:44,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475559939] [2024-06-21 18:58:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:44,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:46,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:46,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475559939] [2024-06-21 18:58:46,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475559939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:46,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:46,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:58:46,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144701416] [2024-06-21 18:58:46,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:46,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:58:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:46,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:58:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:58:46,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:58:46,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 157 transitions, 1966 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 18:58:46,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:46,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:58:46,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:47,038 INFO L124 PetriNetUnfolderBase]: 2578/4054 cut-off events. [2024-06-21 18:58:47,038 INFO L125 PetriNetUnfolderBase]: For 62733/62787 co-relation queries the response was YES. [2024-06-21 18:58:47,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22723 conditions, 4054 events. 2578/4054 cut-off events. For 62733/62787 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22027 event pairs, 715 based on Foata normal form. 52/4092 useless extension candidates. Maximal degree in co-relation 22669. Up to 3170 conditions per place. [2024-06-21 18:58:47,066 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 86 changer transitions 0/194 dead transitions. [2024-06-21 18:58:47,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 194 transitions, 2565 flow [2024-06-21 18:58:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:58:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:58:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 18:58:47,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-21 18:58:47,068 INFO L175 Difference]: Start difference. First operand has 109 places, 157 transitions, 1966 flow. Second operand 8 states and 174 transitions. [2024-06-21 18:58:47,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 194 transitions, 2565 flow [2024-06-21 18:58:47,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 194 transitions, 2487 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 18:58:47,128 INFO L231 Difference]: Finished difference. Result has 114 places, 158 transitions, 2088 flow [2024-06-21 18:58:47,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2088, PETRI_PLACES=114, PETRI_TRANSITIONS=158} [2024-06-21 18:58:47,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-21 18:58:47,129 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 158 transitions, 2088 flow [2024-06-21 18:58:47,129 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 18:58:47,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:47,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:47,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 18:58:47,130 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 18:58:47,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:47,131 INFO L85 PathProgramCache]: Analyzing trace with hash 481908461, now seen corresponding path program 3 times [2024-06-21 18:58:47,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:47,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463365975] [2024-06-21 18:58:47,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:47,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:49,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:49,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463365975] [2024-06-21 18:58:49,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463365975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:49,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:49,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:58:49,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27062754] [2024-06-21 18:58:49,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:49,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:58:49,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:49,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:58:49,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:58:49,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 18:58:49,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 158 transitions, 2088 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 18:58:49,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:49,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 18:58:49,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:50,427 INFO L124 PetriNetUnfolderBase]: 2537/3994 cut-off events. [2024-06-21 18:58:50,427 INFO L125 PetriNetUnfolderBase]: For 65495/65532 co-relation queries the response was YES. [2024-06-21 18:58:50,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22772 conditions, 3994 events. 2537/3994 cut-off events. For 65495/65532 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 21541 event pairs, 701 based on Foata normal form. 50/4039 useless extension candidates. Maximal degree in co-relation 22716. Up to 3213 conditions per place. [2024-06-21 18:58:50,454 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 89 changer transitions 0/194 dead transitions. [2024-06-21 18:58:50,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 194 transitions, 2682 flow [2024-06-21 18:58:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:58:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:58:50,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 18:58:50,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-21 18:58:50,456 INFO L175 Difference]: Start difference. First operand has 114 places, 158 transitions, 2088 flow. Second operand 8 states and 171 transitions. [2024-06-21 18:58:50,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 194 transitions, 2682 flow [2024-06-21 18:58:50,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 194 transitions, 2499 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 18:58:50,533 INFO L231 Difference]: Finished difference. Result has 116 places, 158 transitions, 2090 flow [2024-06-21 18:58:50,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2090, PETRI_PLACES=116, PETRI_TRANSITIONS=158} [2024-06-21 18:58:50,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 18:58:50,533 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 158 transitions, 2090 flow [2024-06-21 18:58:50,534 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 18:58:50,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:50,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:50,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 18:58:50,534 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 18:58:50,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:50,534 INFO L85 PathProgramCache]: Analyzing trace with hash 794282685, now seen corresponding path program 1 times [2024-06-21 18:58:50,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:50,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568578771] [2024-06-21 18:58:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:50,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:52,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:52,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568578771] [2024-06-21 18:58:52,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568578771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:52,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:52,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:58:52,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148261311] [2024-06-21 18:58:52,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:52,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:58:52,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:52,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:58:52,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:58:53,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:58:53,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 158 transitions, 2090 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 18:58:53,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:53,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:58:53,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:54,125 INFO L124 PetriNetUnfolderBase]: 2748/4238 cut-off events. [2024-06-21 18:58:54,125 INFO L125 PetriNetUnfolderBase]: For 68981/69001 co-relation queries the response was YES. [2024-06-21 18:58:54,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24224 conditions, 4238 events. 2748/4238 cut-off events. For 68981/69001 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21937 event pairs, 736 based on Foata normal form. 24/4261 useless extension candidates. Maximal degree in co-relation 24167. Up to 3601 conditions per place. [2024-06-21 18:58:54,157 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 110 selfloop transitions, 82 changer transitions 0/197 dead transitions. [2024-06-21 18:58:54,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 2680 flow [2024-06-21 18:58:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:58:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:58:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 18:58:54,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 18:58:54,159 INFO L175 Difference]: Start difference. First operand has 116 places, 158 transitions, 2090 flow. Second operand 9 states and 174 transitions. [2024-06-21 18:58:54,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 2680 flow [2024-06-21 18:58:54,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 197 transitions, 2499 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 18:58:54,248 INFO L231 Difference]: Finished difference. Result has 119 places, 161 transitions, 2120 flow [2024-06-21 18:58:54,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2120, PETRI_PLACES=119, PETRI_TRANSITIONS=161} [2024-06-21 18:58:54,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 18:58:54,248 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 161 transitions, 2120 flow [2024-06-21 18:58:54,248 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 18:58:54,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:54,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:54,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 18:58:54,249 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 18:58:54,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:54,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1764410775, now seen corresponding path program 1 times [2024-06-21 18:58:54,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:54,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779237688] [2024-06-21 18:58:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:58:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779237688] [2024-06-21 18:58:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779237688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:55,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:55,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:58:55,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967656236] [2024-06-21 18:58:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:55,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:58:55,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:58:55,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:58:55,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:58:55,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 161 transitions, 2120 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 18:58:55,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:55,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:58:55,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:56,676 INFO L124 PetriNetUnfolderBase]: 2797/4292 cut-off events. [2024-06-21 18:58:56,676 INFO L125 PetriNetUnfolderBase]: For 73082/73082 co-relation queries the response was YES. [2024-06-21 18:58:56,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24927 conditions, 4292 events. 2797/4292 cut-off events. For 73082/73082 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22124 event pairs, 1146 based on Foata normal form. 1/4288 useless extension candidates. Maximal degree in co-relation 24869. Up to 4119 conditions per place. [2024-06-21 18:58:56,708 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 160 selfloop transitions, 23 changer transitions 0/188 dead transitions. [2024-06-21 18:58:56,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 188 transitions, 2674 flow [2024-06-21 18:58:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:58:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:58:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 18:58:56,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 18:58:56,709 INFO L175 Difference]: Start difference. First operand has 119 places, 161 transitions, 2120 flow. Second operand 7 states and 127 transitions. [2024-06-21 18:58:56,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 188 transitions, 2674 flow [2024-06-21 18:58:56,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 188 transitions, 2487 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 18:58:56,795 INFO L231 Difference]: Finished difference. Result has 120 places, 170 transitions, 2094 flow [2024-06-21 18:58:56,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2094, PETRI_PLACES=120, PETRI_TRANSITIONS=170} [2024-06-21 18:58:56,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 18:58:56,796 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 170 transitions, 2094 flow [2024-06-21 18:58:56,796 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 18:58:56,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:56,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:56,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 18:58:56,796 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 18:58:56,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1376086651, now seen corresponding path program 2 times [2024-06-21 18:58:56,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:56,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022646706] [2024-06-21 18:58:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:58:58,711 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 18:58:58,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:58:58,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022646706] [2024-06-21 18:58:58,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022646706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:58:58,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:58:58,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:58:58,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387434983] [2024-06-21 18:58:58,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:58:58,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:58:58,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:58:58,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:58:58,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:58:58,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:58:58,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 170 transitions, 2094 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 18:58:58,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:58:58,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:58:58,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:58:59,741 INFO L124 PetriNetUnfolderBase]: 2853/4380 cut-off events. [2024-06-21 18:58:59,741 INFO L125 PetriNetUnfolderBase]: For 80214/80214 co-relation queries the response was YES. [2024-06-21 18:58:59,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25522 conditions, 4380 events. 2853/4380 cut-off events. For 80214/80214 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 22747 event pairs, 1241 based on Foata normal form. 8/4383 useless extension candidates. Maximal degree in co-relation 25462. Up to 3839 conditions per place. [2024-06-21 18:58:59,772 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 137 selfloop transitions, 73 changer transitions 0/215 dead transitions. [2024-06-21 18:58:59,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 215 transitions, 2816 flow [2024-06-21 18:58:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:58:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:58:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 18:58:59,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 18:58:59,777 INFO L175 Difference]: Start difference. First operand has 120 places, 170 transitions, 2094 flow. Second operand 9 states and 161 transitions. [2024-06-21 18:58:59,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 215 transitions, 2816 flow [2024-06-21 18:58:59,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 215 transitions, 2783 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 18:58:59,855 INFO L231 Difference]: Finished difference. Result has 128 places, 183 transitions, 2396 flow [2024-06-21 18:58:59,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2396, PETRI_PLACES=128, PETRI_TRANSITIONS=183} [2024-06-21 18:58:59,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 18:58:59,856 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 183 transitions, 2396 flow [2024-06-21 18:58:59,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 18:58:59,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:58:59,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:58:59,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 18:58:59,856 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:58:59,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:58:59,856 INFO L85 PathProgramCache]: Analyzing trace with hash -666881163, now seen corresponding path program 2 times [2024-06-21 18:58:59,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:58:59,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570480063] [2024-06-21 18:58:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:58:59,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:58:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:01,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:01,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570480063] [2024-06-21 18:59:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570480063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:01,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:59:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103422503] [2024-06-21 18:59:01,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:01,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:59:01,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:01,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:59:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:59:01,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 18:59:01,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 183 transitions, 2396 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 18:59:01,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:01,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 18:59:01,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:02,134 INFO L124 PetriNetUnfolderBase]: 2999/4537 cut-off events. [2024-06-21 18:59:02,134 INFO L125 PetriNetUnfolderBase]: For 87454/87454 co-relation queries the response was YES. [2024-06-21 18:59:02,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27431 conditions, 4537 events. 2999/4537 cut-off events. For 87454/87454 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23024 event pairs, 1342 based on Foata normal form. 1/4537 useless extension candidates. Maximal degree in co-relation 27368. Up to 4470 conditions per place. [2024-06-21 18:59:02,168 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 176 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-21 18:59:02,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 203 transitions, 2955 flow [2024-06-21 18:59:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:59:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:59:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 18:59:02,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 18:59:02,169 INFO L175 Difference]: Start difference. First operand has 128 places, 183 transitions, 2396 flow. Second operand 6 states and 104 transitions. [2024-06-21 18:59:02,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 203 transitions, 2955 flow [2024-06-21 18:59:02,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 203 transitions, 2789 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 18:59:02,257 INFO L231 Difference]: Finished difference. Result has 129 places, 191 transitions, 2386 flow [2024-06-21 18:59:02,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2386, PETRI_PLACES=129, PETRI_TRANSITIONS=191} [2024-06-21 18:59:02,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 18:59:02,257 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 191 transitions, 2386 flow [2024-06-21 18:59:02,258 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 18:59:02,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:02,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:02,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 18:59:02,258 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 18:59:02,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:02,259 INFO L85 PathProgramCache]: Analyzing trace with hash -595744315, now seen corresponding path program 3 times [2024-06-21 18:59:02,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:02,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876887931] [2024-06-21 18:59:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:02,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:04,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876887931] [2024-06-21 18:59:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876887931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:04,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:04,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:59:04,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399382879] [2024-06-21 18:59:04,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:04,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:59:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:59:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:59:04,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:04,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 191 transitions, 2386 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 18:59:04,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:04,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:04,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:05,498 INFO L124 PetriNetUnfolderBase]: 2894/4438 cut-off events. [2024-06-21 18:59:05,499 INFO L125 PetriNetUnfolderBase]: For 92592/92592 co-relation queries the response was YES. [2024-06-21 18:59:05,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27066 conditions, 4438 events. 2894/4438 cut-off events. For 92592/92592 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23068 event pairs, 1276 based on Foata normal form. 4/4437 useless extension candidates. Maximal degree in co-relation 27002. Up to 4178 conditions per place. [2024-06-21 18:59:05,526 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 36 changer transitions 0/231 dead transitions. [2024-06-21 18:59:05,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 231 transitions, 3139 flow [2024-06-21 18:59:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:59:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:59:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 18:59:05,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 18:59:05,527 INFO L175 Difference]: Start difference. First operand has 129 places, 191 transitions, 2386 flow. Second operand 8 states and 145 transitions. [2024-06-21 18:59:05,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 231 transitions, 3139 flow [2024-06-21 18:59:05,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 231 transitions, 3088 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 18:59:05,642 INFO L231 Difference]: Finished difference. Result has 135 places, 201 transitions, 2596 flow [2024-06-21 18:59:05,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2596, PETRI_PLACES=135, PETRI_TRANSITIONS=201} [2024-06-21 18:59:05,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 18:59:05,643 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 201 transitions, 2596 flow [2024-06-21 18:59:05,643 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 18:59:05,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:05,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:05,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 18:59:05,643 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 18:59:05,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1005558131, now seen corresponding path program 4 times [2024-06-21 18:59:05,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:05,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417977565] [2024-06-21 18:59:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:05,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:07,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:07,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417977565] [2024-06-21 18:59:07,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417977565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:07,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:07,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:59:07,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13760460] [2024-06-21 18:59:07,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:59:07,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:59:07,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:59:07,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:07,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 201 transitions, 2596 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 18:59:07,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:07,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:07,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:08,304 INFO L124 PetriNetUnfolderBase]: 2911/4466 cut-off events. [2024-06-21 18:59:08,305 INFO L125 PetriNetUnfolderBase]: For 101899/101899 co-relation queries the response was YES. [2024-06-21 18:59:08,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28010 conditions, 4466 events. 2911/4466 cut-off events. For 101899/101899 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23201 event pairs, 1261 based on Foata normal form. 4/4465 useless extension candidates. Maximal degree in co-relation 27944. Up to 4258 conditions per place. [2024-06-21 18:59:08,339 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 22 changer transitions 0/229 dead transitions. [2024-06-21 18:59:08,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 229 transitions, 3213 flow [2024-06-21 18:59:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:59:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:59:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 18:59:08,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 18:59:08,341 INFO L175 Difference]: Start difference. First operand has 135 places, 201 transitions, 2596 flow. Second operand 9 states and 151 transitions. [2024-06-21 18:59:08,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 229 transitions, 3213 flow [2024-06-21 18:59:08,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 229 transitions, 3098 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 18:59:08,463 INFO L231 Difference]: Finished difference. Result has 139 places, 206 transitions, 2632 flow [2024-06-21 18:59:08,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2632, PETRI_PLACES=139, PETRI_TRANSITIONS=206} [2024-06-21 18:59:08,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 18:59:08,464 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 206 transitions, 2632 flow [2024-06-21 18:59:08,464 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 18:59:08,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:08,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:08,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 18:59:08,464 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 18:59:08,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash -359568955, now seen corresponding path program 5 times [2024-06-21 18:59:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:08,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435056991] [2024-06-21 18:59:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:08,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:08,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:10,331 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 18:59:10,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:10,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435056991] [2024-06-21 18:59:10,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435056991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:10,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:10,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:59:10,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130627896] [2024-06-21 18:59:10,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:10,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:59:10,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:59:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:59:10,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:10,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 206 transitions, 2632 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 18:59:10,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:10,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:10,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:11,376 INFO L124 PetriNetUnfolderBase]: 2914/4471 cut-off events. [2024-06-21 18:59:11,377 INFO L125 PetriNetUnfolderBase]: For 108387/108387 co-relation queries the response was YES. [2024-06-21 18:59:11,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28367 conditions, 4471 events. 2914/4471 cut-off events. For 108387/108387 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 23247 event pairs, 1277 based on Foata normal form. 4/4470 useless extension candidates. Maximal degree in co-relation 28300. Up to 4219 conditions per place. [2024-06-21 18:59:11,411 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 199 selfloop transitions, 37 changer transitions 0/241 dead transitions. [2024-06-21 18:59:11,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 241 transitions, 3287 flow [2024-06-21 18:59:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:59:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:59:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 18:59:11,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 18:59:11,413 INFO L175 Difference]: Start difference. First operand has 139 places, 206 transitions, 2632 flow. Second operand 9 states and 160 transitions. [2024-06-21 18:59:11,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 241 transitions, 3287 flow [2024-06-21 18:59:11,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 241 transitions, 3220 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 18:59:11,536 INFO L231 Difference]: Finished difference. Result has 143 places, 210 transitions, 2709 flow [2024-06-21 18:59:11,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2709, PETRI_PLACES=143, PETRI_TRANSITIONS=210} [2024-06-21 18:59:11,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-21 18:59:11,537 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 210 transitions, 2709 flow [2024-06-21 18:59:11,537 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 18:59:11,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:11,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:11,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 18:59:11,538 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 18:59:11,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1689408631, now seen corresponding path program 1 times [2024-06-21 18:59:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:11,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392328530] [2024-06-21 18:59:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:11,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:13,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392328530] [2024-06-21 18:59:13,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392328530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:13,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:13,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 18:59:13,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501670024] [2024-06-21 18:59:13,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:13,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 18:59:13,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:13,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 18:59:13,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 18:59:13,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:13,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 210 transitions, 2709 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 18:59:13,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:13,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:13,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:14,327 INFO L124 PetriNetUnfolderBase]: 2894/4440 cut-off events. [2024-06-21 18:59:14,327 INFO L125 PetriNetUnfolderBase]: For 115257/115257 co-relation queries the response was YES. [2024-06-21 18:59:14,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28565 conditions, 4440 events. 2894/4440 cut-off events. For 115257/115257 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23049 event pairs, 1261 based on Foata normal form. 2/4437 useless extension candidates. Maximal degree in co-relation 28497. Up to 3914 conditions per place. [2024-06-21 18:59:14,362 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 147 selfloop transitions, 85 changer transitions 0/237 dead transitions. [2024-06-21 18:59:14,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 3303 flow [2024-06-21 18:59:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:59:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:59:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 18:59:14,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 18:59:14,364 INFO L175 Difference]: Start difference. First operand has 143 places, 210 transitions, 2709 flow. Second operand 7 states and 136 transitions. [2024-06-21 18:59:14,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 3303 flow [2024-06-21 18:59:14,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 237 transitions, 3206 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 18:59:14,515 INFO L231 Difference]: Finished difference. Result has 145 places, 210 transitions, 2813 flow [2024-06-21 18:59:14,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2813, PETRI_PLACES=145, PETRI_TRANSITIONS=210} [2024-06-21 18:59:14,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 18:59:14,515 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 210 transitions, 2813 flow [2024-06-21 18:59:14,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 18:59:14,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:14,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:14,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 18:59:14,516 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:14,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1752557903, now seen corresponding path program 3 times [2024-06-21 18:59:14,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:14,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587909383] [2024-06-21 18:59:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:14,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:15,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587909383] [2024-06-21 18:59:15,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587909383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:15,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:15,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:59:15,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874554562] [2024-06-21 18:59:15,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:15,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:59:15,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:59:15,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:59:15,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 18:59:15,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 210 transitions, 2813 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 18:59:15,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:15,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 18:59:15,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:16,675 INFO L124 PetriNetUnfolderBase]: 3027/4570 cut-off events. [2024-06-21 18:59:16,675 INFO L125 PetriNetUnfolderBase]: For 122837/122837 co-relation queries the response was YES. [2024-06-21 18:59:16,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29658 conditions, 4570 events. 3027/4570 cut-off events. For 122837/122837 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23081 event pairs, 1351 based on Foata normal form. 1/4570 useless extension candidates. Maximal degree in co-relation 29588. Up to 4525 conditions per place. [2024-06-21 18:59:16,712 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 13 changer transitions 0/218 dead transitions. [2024-06-21 18:59:16,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 218 transitions, 3269 flow [2024-06-21 18:59:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:59:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:59:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 18:59:16,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-21 18:59:16,713 INFO L175 Difference]: Start difference. First operand has 145 places, 210 transitions, 2813 flow. Second operand 6 states and 97 transitions. [2024-06-21 18:59:16,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 218 transitions, 3269 flow [2024-06-21 18:59:16,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 218 transitions, 3132 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 18:59:16,865 INFO L231 Difference]: Finished difference. Result has 146 places, 210 transitions, 2708 flow [2024-06-21 18:59:16,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2708, PETRI_PLACES=146, PETRI_TRANSITIONS=210} [2024-06-21 18:59:16,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 18:59:16,866 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 210 transitions, 2708 flow [2024-06-21 18:59:16,866 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 18:59:16,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:16,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:16,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 18:59:16,867 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:16,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1746849935, now seen corresponding path program 1 times [2024-06-21 18:59:16,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:16,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966007529] [2024-06-21 18:59:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:18,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:18,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966007529] [2024-06-21 18:59:18,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966007529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:18,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:18,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:59:18,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762389972] [2024-06-21 18:59:18,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:18,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:59:18,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:18,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:59:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:59:18,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:18,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 210 transitions, 2708 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 18:59:18,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:18,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:18,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:19,488 INFO L124 PetriNetUnfolderBase]: 2896/4434 cut-off events. [2024-06-21 18:59:19,488 INFO L125 PetriNetUnfolderBase]: For 129405/129405 co-relation queries the response was YES. [2024-06-21 18:59:19,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28934 conditions, 4434 events. 2896/4434 cut-off events. For 129405/129405 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22924 event pairs, 1275 based on Foata normal form. 1/4430 useless extension candidates. Maximal degree in co-relation 28863. Up to 4276 conditions per place. [2024-06-21 18:59:19,526 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 21 changer transitions 0/227 dead transitions. [2024-06-21 18:59:19,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 227 transitions, 3306 flow [2024-06-21 18:59:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:59:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:59:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 18:59:19,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 18:59:19,528 INFO L175 Difference]: Start difference. First operand has 146 places, 210 transitions, 2708 flow. Second operand 6 states and 108 transitions. [2024-06-21 18:59:19,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 227 transitions, 3306 flow [2024-06-21 18:59:19,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 227 transitions, 3278 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 18:59:19,680 INFO L231 Difference]: Finished difference. Result has 148 places, 216 transitions, 2801 flow [2024-06-21 18:59:19,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2801, PETRI_PLACES=148, PETRI_TRANSITIONS=216} [2024-06-21 18:59:19,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-21 18:59:19,681 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 216 transitions, 2801 flow [2024-06-21 18:59:19,681 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 18:59:19,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:19,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:19,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 18:59:19,682 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:19,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:19,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2026721231, now seen corresponding path program 2 times [2024-06-21 18:59:19,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:19,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291382845] [2024-06-21 18:59:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:19,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:21,401 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 18:59:21,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:21,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291382845] [2024-06-21 18:59:21,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291382845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:21,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:21,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 18:59:21,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129209184] [2024-06-21 18:59:21,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:21,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 18:59:21,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 18:59:21,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 18:59:21,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:21,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 216 transitions, 2801 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 18:59:21,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:21,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:21,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:22,387 INFO L124 PetriNetUnfolderBase]: 2893/4430 cut-off events. [2024-06-21 18:59:22,388 INFO L125 PetriNetUnfolderBase]: For 138354/138358 co-relation queries the response was YES. [2024-06-21 18:59:22,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29564 conditions, 4430 events. 2893/4430 cut-off events. For 138354/138358 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 22854 event pairs, 1269 based on Foata normal form. 5/4430 useless extension candidates. Maximal degree in co-relation 29491. Up to 4273 conditions per place. [2024-06-21 18:59:22,425 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 198 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-21 18:59:22,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 224 transitions, 3265 flow [2024-06-21 18:59:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 18:59:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 18:59:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 18:59:22,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 18:59:22,426 INFO L175 Difference]: Start difference. First operand has 148 places, 216 transitions, 2801 flow. Second operand 6 states and 104 transitions. [2024-06-21 18:59:22,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 224 transitions, 3265 flow [2024-06-21 18:59:22,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 224 transitions, 3220 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 18:59:22,615 INFO L231 Difference]: Finished difference. Result has 152 places, 216 transitions, 2806 flow [2024-06-21 18:59:22,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2806, PETRI_PLACES=152, PETRI_TRANSITIONS=216} [2024-06-21 18:59:22,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 18:59:22,616 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 216 transitions, 2806 flow [2024-06-21 18:59:22,616 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 18:59:22,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:22,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:22,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 18:59:22,617 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:22,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:22,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1752571791, now seen corresponding path program 1 times [2024-06-21 18:59:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:22,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410816164] [2024-06-21 18:59:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:22,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:22,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:24,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:24,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410816164] [2024-06-21 18:59:24,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410816164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:24,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:24,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:59:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075386218] [2024-06-21 18:59:24,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:24,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:59:24,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:24,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:59:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:59:24,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 18:59:24,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 216 transitions, 2806 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:24,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:24,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 18:59:24,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:25,884 INFO L124 PetriNetUnfolderBase]: 3020/4561 cut-off events. [2024-06-21 18:59:25,884 INFO L125 PetriNetUnfolderBase]: For 144544/144544 co-relation queries the response was YES. [2024-06-21 18:59:25,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30188 conditions, 4561 events. 3020/4561 cut-off events. For 144544/144544 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22929 event pairs, 1347 based on Foata normal form. 3/4563 useless extension candidates. Maximal degree in co-relation 30111. Up to 4507 conditions per place. [2024-06-21 18:59:25,923 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 16 changer transitions 0/230 dead transitions. [2024-06-21 18:59:25,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 230 transitions, 3328 flow [2024-06-21 18:59:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:59:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:59:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 18:59:25,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 18:59:25,924 INFO L175 Difference]: Start difference. First operand has 152 places, 216 transitions, 2806 flow. Second operand 7 states and 111 transitions. [2024-06-21 18:59:25,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 230 transitions, 3328 flow [2024-06-21 18:59:26,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 230 transitions, 3282 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 18:59:26,108 INFO L231 Difference]: Finished difference. Result has 155 places, 219 transitions, 2842 flow [2024-06-21 18:59:26,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2842, PETRI_PLACES=155, PETRI_TRANSITIONS=219} [2024-06-21 18:59:26,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 18:59:26,109 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 219 transitions, 2842 flow [2024-06-21 18:59:26,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:26,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:26,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:26,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 18:59:26,109 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:26,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1418027047, now seen corresponding path program 1 times [2024-06-21 18:59:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:26,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501695924] [2024-06-21 18:59:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:27,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:27,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501695924] [2024-06-21 18:59:27,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501695924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:27,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:27,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:59:27,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983888581] [2024-06-21 18:59:27,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:27,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:59:27,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:59:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:59:27,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:27,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 219 transitions, 2842 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 18:59:27,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:27,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:27,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:28,783 INFO L124 PetriNetUnfolderBase]: 2939/4494 cut-off events. [2024-06-21 18:59:28,783 INFO L125 PetriNetUnfolderBase]: For 151639/151653 co-relation queries the response was YES. [2024-06-21 18:59:28,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30653 conditions, 4494 events. 2939/4494 cut-off events. For 151639/151653 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23131 event pairs, 968 based on Foata normal form. 14/4503 useless extension candidates. Maximal degree in co-relation 30574. Up to 4067 conditions per place. [2024-06-21 18:59:28,818 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 70 changer transitions 0/274 dead transitions. [2024-06-21 18:59:28,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 274 transitions, 4028 flow [2024-06-21 18:59:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:59:28,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:59:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 18:59:28,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 18:59:28,819 INFO L175 Difference]: Start difference. First operand has 155 places, 219 transitions, 2842 flow. Second operand 8 states and 154 transitions. [2024-06-21 18:59:28,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 274 transitions, 4028 flow [2024-06-21 18:59:28,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 274 transitions, 3978 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 18:59:28,994 INFO L231 Difference]: Finished difference. Result has 161 places, 244 transitions, 3402 flow [2024-06-21 18:59:28,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3402, PETRI_PLACES=161, PETRI_TRANSITIONS=244} [2024-06-21 18:59:28,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 18:59:28,995 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 244 transitions, 3402 flow [2024-06-21 18:59:28,995 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 18:59:28,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:28,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:28,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 18:59:28,995 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 18:59:28,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1601493763, now seen corresponding path program 1 times [2024-06-21 18:59:28,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:28,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718533099] [2024-06-21 18:59:28,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:28,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:31,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:31,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718533099] [2024-06-21 18:59:31,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718533099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:31,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:31,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:59:31,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324486501] [2024-06-21 18:59:31,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:31,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:59:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:31,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:59:31,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:59:32,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:32,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 244 transitions, 3402 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:32,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:32,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:32,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:33,249 INFO L124 PetriNetUnfolderBase]: 3070/4703 cut-off events. [2024-06-21 18:59:33,249 INFO L125 PetriNetUnfolderBase]: For 168938/168949 co-relation queries the response was YES. [2024-06-21 18:59:33,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33514 conditions, 4703 events. 3070/4703 cut-off events. For 168938/168949 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24498 event pairs, 982 based on Foata normal form. 12/4710 useless extension candidates. Maximal degree in co-relation 33431. Up to 3864 conditions per place. [2024-06-21 18:59:33,291 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 182 selfloop transitions, 124 changer transitions 0/311 dead transitions. [2024-06-21 18:59:33,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 311 transitions, 4779 flow [2024-06-21 18:59:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:59:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:59:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:59:33,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 18:59:33,293 INFO L175 Difference]: Start difference. First operand has 161 places, 244 transitions, 3402 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:59:33,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 311 transitions, 4779 flow [2024-06-21 18:59:33,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 311 transitions, 4660 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-21 18:59:33,522 INFO L231 Difference]: Finished difference. Result has 170 places, 270 transitions, 4026 flow [2024-06-21 18:59:33,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4026, PETRI_PLACES=170, PETRI_TRANSITIONS=270} [2024-06-21 18:59:33,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 18:59:33,523 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 270 transitions, 4026 flow [2024-06-21 18:59:33,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:33,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:33,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:33,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 18:59:33,523 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 18:59:33,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:33,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1426008915, now seen corresponding path program 2 times [2024-06-21 18:59:33,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:33,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961138009] [2024-06-21 18:59:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:33,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:35,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:35,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961138009] [2024-06-21 18:59:35,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961138009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:35,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:35,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:59:35,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570663137] [2024-06-21 18:59:35,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:35,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:59:35,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:59:36,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:59:36,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:36,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 270 transitions, 4026 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:36,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:36,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:36,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:37,474 INFO L124 PetriNetUnfolderBase]: 3123/4782 cut-off events. [2024-06-21 18:59:37,474 INFO L125 PetriNetUnfolderBase]: For 179315/179323 co-relation queries the response was YES. [2024-06-21 18:59:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34942 conditions, 4782 events. 3123/4782 cut-off events. For 179315/179323 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 24969 event pairs, 996 based on Foata normal form. 10/4787 useless extension candidates. Maximal degree in co-relation 34855. Up to 4056 conditions per place. [2024-06-21 18:59:37,515 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 189 selfloop transitions, 127 changer transitions 0/321 dead transitions. [2024-06-21 18:59:37,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 321 transitions, 5147 flow [2024-06-21 18:59:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:59:37,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:59:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 18:59:37,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 18:59:37,517 INFO L175 Difference]: Start difference. First operand has 170 places, 270 transitions, 4026 flow. Second operand 9 states and 173 transitions. [2024-06-21 18:59:37,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 321 transitions, 5147 flow [2024-06-21 18:59:37,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 321 transitions, 5018 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 18:59:37,752 INFO L231 Difference]: Finished difference. Result has 177 places, 284 transitions, 4474 flow [2024-06-21 18:59:37,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3919, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4474, PETRI_PLACES=177, PETRI_TRANSITIONS=284} [2024-06-21 18:59:37,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-21 18:59:37,753 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 284 transitions, 4474 flow [2024-06-21 18:59:37,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:37,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:37,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:37,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 18:59:37,753 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 18:59:37,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1420444725, now seen corresponding path program 3 times [2024-06-21 18:59:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:37,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478310949] [2024-06-21 18:59:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:37,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:39,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:39,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478310949] [2024-06-21 18:59:39,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478310949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:39,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:39,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:59:39,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833919902] [2024-06-21 18:59:39,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:39,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:59:39,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:39,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:59:39,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:59:40,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:40,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 284 transitions, 4474 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:40,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:40,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:40,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:41,395 INFO L124 PetriNetUnfolderBase]: 3166/4845 cut-off events. [2024-06-21 18:59:41,395 INFO L125 PetriNetUnfolderBase]: For 189978/189980 co-relation queries the response was YES. [2024-06-21 18:59:41,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36248 conditions, 4845 events. 3166/4845 cut-off events. For 189978/189980 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25346 event pairs, 1024 based on Foata normal form. 6/4846 useless extension candidates. Maximal degree in co-relation 36158. Up to 4099 conditions per place. [2024-06-21 18:59:41,440 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 186 selfloop transitions, 147 changer transitions 0/338 dead transitions. [2024-06-21 18:59:41,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 338 transitions, 5716 flow [2024-06-21 18:59:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:59:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:59:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 18:59:41,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 18:59:41,442 INFO L175 Difference]: Start difference. First operand has 177 places, 284 transitions, 4474 flow. Second operand 9 states and 175 transitions. [2024-06-21 18:59:41,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 338 transitions, 5716 flow [2024-06-21 18:59:41,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 338 transitions, 5422 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 18:59:41,739 INFO L231 Difference]: Finished difference. Result has 182 places, 305 transitions, 5055 flow [2024-06-21 18:59:41,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5055, PETRI_PLACES=182, PETRI_TRANSITIONS=305} [2024-06-21 18:59:41,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 18:59:41,740 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 305 transitions, 5055 flow [2024-06-21 18:59:41,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:41,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:41,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:41,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 18:59:41,740 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:41,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:41,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1137831295, now seen corresponding path program 2 times [2024-06-21 18:59:41,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:41,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264650305] [2024-06-21 18:59:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:41,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:43,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:43,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264650305] [2024-06-21 18:59:43,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264650305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:43,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:43,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:59:43,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398341294] [2024-06-21 18:59:43,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:43,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:59:43,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:43,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:59:43,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:59:43,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:43,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 305 transitions, 5055 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 18:59:43,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:43,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:43,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:44,971 INFO L124 PetriNetUnfolderBase]: 3218/4912 cut-off events. [2024-06-21 18:59:44,972 INFO L125 PetriNetUnfolderBase]: For 201678/201684 co-relation queries the response was YES. [2024-06-21 18:59:44,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37498 conditions, 4912 events. 3218/4912 cut-off events. For 201678/201684 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25723 event pairs, 989 based on Foata normal form. 8/4915 useless extension candidates. Maximal degree in co-relation 37405. Up to 4448 conditions per place. [2024-06-21 18:59:45,016 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 260 selfloop transitions, 84 changer transitions 0/349 dead transitions. [2024-06-21 18:59:45,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 349 transitions, 6298 flow [2024-06-21 18:59:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:59:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:59:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 18:59:45,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-21 18:59:45,018 INFO L175 Difference]: Start difference. First operand has 182 places, 305 transitions, 5055 flow. Second operand 8 states and 155 transitions. [2024-06-21 18:59:45,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 349 transitions, 6298 flow [2024-06-21 18:59:45,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 349 transitions, 6104 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 18:59:45,308 INFO L231 Difference]: Finished difference. Result has 189 places, 323 transitions, 5361 flow [2024-06-21 18:59:45,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4867, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5361, PETRI_PLACES=189, PETRI_TRANSITIONS=323} [2024-06-21 18:59:45,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 18:59:45,309 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 323 transitions, 5361 flow [2024-06-21 18:59:45,309 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 18:59:45,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:45,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:45,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 18:59:45,310 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:45,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:45,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1154476807, now seen corresponding path program 1 times [2024-06-21 18:59:45,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:45,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489089670] [2024-06-21 18:59:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:45,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:47,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:47,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489089670] [2024-06-21 18:59:47,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489089670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:47,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:47,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:59:47,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071169777] [2024-06-21 18:59:47,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:47,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:59:47,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:47,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:59:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:59:47,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 18:59:47,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 323 transitions, 5361 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:47,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:47,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 18:59:47,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:48,507 INFO L124 PetriNetUnfolderBase]: 3355/5057 cut-off events. [2024-06-21 18:59:48,507 INFO L125 PetriNetUnfolderBase]: For 211402/211404 co-relation queries the response was YES. [2024-06-21 18:59:48,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38644 conditions, 5057 events. 3355/5057 cut-off events. For 211402/211404 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25924 event pairs, 1238 based on Foata normal form. 3/5059 useless extension candidates. Maximal degree in co-relation 38547. Up to 4959 conditions per place. [2024-06-21 18:59:48,547 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 308 selfloop transitions, 37 changer transitions 0/348 dead transitions. [2024-06-21 18:59:48,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 348 transitions, 6281 flow [2024-06-21 18:59:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:59:48,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:59:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 18:59:48,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 18:59:48,548 INFO L175 Difference]: Start difference. First operand has 189 places, 323 transitions, 5361 flow. Second operand 8 states and 135 transitions. [2024-06-21 18:59:48,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 348 transitions, 6281 flow [2024-06-21 18:59:48,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 348 transitions, 6165 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 18:59:48,816 INFO L231 Difference]: Finished difference. Result has 194 places, 329 transitions, 5424 flow [2024-06-21 18:59:48,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5245, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5424, PETRI_PLACES=194, PETRI_TRANSITIONS=329} [2024-06-21 18:59:48,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 18:59:48,817 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 329 transitions, 5424 flow [2024-06-21 18:59:48,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:48,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:48,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:48,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 18:59:48,817 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:59:48,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:48,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1137841525, now seen corresponding path program 3 times [2024-06-21 18:59:48,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:48,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337821502] [2024-06-21 18:59:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:48,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:50,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:50,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337821502] [2024-06-21 18:59:50,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337821502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:50,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:50,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 18:59:50,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024756768] [2024-06-21 18:59:50,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:50,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 18:59:50,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:50,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 18:59:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 18:59:50,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:50,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 329 transitions, 5424 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 18:59:50,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:50,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:50,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:52,131 INFO L124 PetriNetUnfolderBase]: 3231/4928 cut-off events. [2024-06-21 18:59:52,131 INFO L125 PetriNetUnfolderBase]: For 223261/223270 co-relation queries the response was YES. [2024-06-21 18:59:52,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38302 conditions, 4928 events. 3231/4928 cut-off events. For 223261/223270 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25772 event pairs, 988 based on Foata normal form. 10/4933 useless extension candidates. Maximal degree in co-relation 38204. Up to 4463 conditions per place. [2024-06-21 18:59:52,186 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 263 selfloop transitions, 81 changer transitions 0/351 dead transitions. [2024-06-21 18:59:52,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 351 transitions, 6371 flow [2024-06-21 18:59:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:59:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:59:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 18:59:52,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 18:59:52,188 INFO L175 Difference]: Start difference. First operand has 194 places, 329 transitions, 5424 flow. Second operand 8 states and 149 transitions. [2024-06-21 18:59:52,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 351 transitions, 6371 flow [2024-06-21 18:59:52,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 351 transitions, 6290 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 18:59:52,530 INFO L231 Difference]: Finished difference. Result has 199 places, 329 transitions, 5514 flow [2024-06-21 18:59:52,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5343, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5514, PETRI_PLACES=199, PETRI_TRANSITIONS=329} [2024-06-21 18:59:52,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 18:59:52,531 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 329 transitions, 5514 flow [2024-06-21 18:59:52,531 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 18:59:52,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:52,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:52,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 18:59:52,531 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 18:59:52,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash 60765963, now seen corresponding path program 4 times [2024-06-21 18:59:52,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:52,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165760661] [2024-06-21 18:59:52,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:52,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:54,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:54,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165760661] [2024-06-21 18:59:54,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165760661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:54,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:54,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:59:54,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112127545] [2024-06-21 18:59:54,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:54,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:59:54,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:59:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:59:54,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:54,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 329 transitions, 5514 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:54,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:54,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:54,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:59:56,036 INFO L124 PetriNetUnfolderBase]: 3290/5030 cut-off events. [2024-06-21 18:59:56,036 INFO L125 PetriNetUnfolderBase]: For 237053/237053 co-relation queries the response was YES. [2024-06-21 18:59:56,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39485 conditions, 5030 events. 3290/5030 cut-off events. For 237053/237053 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 26534 event pairs, 1301 based on Foata normal form. 6/5031 useless extension candidates. Maximal degree in co-relation 39385. Up to 4380 conditions per place. [2024-06-21 18:59:56,081 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 233 selfloop transitions, 137 changer transitions 0/377 dead transitions. [2024-06-21 18:59:56,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 377 transitions, 6714 flow [2024-06-21 18:59:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:59:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:59:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 18:59:56,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 18:59:56,082 INFO L175 Difference]: Start difference. First operand has 199 places, 329 transitions, 5514 flow. Second operand 9 states and 162 transitions. [2024-06-21 18:59:56,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 377 transitions, 6714 flow [2024-06-21 18:59:56,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 377 transitions, 6514 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 18:59:56,444 INFO L231 Difference]: Finished difference. Result has 204 places, 345 transitions, 5966 flow [2024-06-21 18:59:56,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5327, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5966, PETRI_PLACES=204, PETRI_TRANSITIONS=345} [2024-06-21 18:59:56,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 18:59:56,445 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 345 transitions, 5966 flow [2024-06-21 18:59:56,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:56,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:59:56,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:59:56,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 18:59:56,446 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 18:59:56,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:59:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash 66330153, now seen corresponding path program 5 times [2024-06-21 18:59:56,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:59:56,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560192889] [2024-06-21 18:59:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:59:56,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:59:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:59:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:59:58,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:59:58,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560192889] [2024-06-21 18:59:58,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560192889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:59:58,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:59:58,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:59:58,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233165169] [2024-06-21 18:59:58,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:59:58,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:59:58,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:59:58,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:59:58,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:59:58,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 18:59:58,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 345 transitions, 5966 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:59:58,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:59:58,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 18:59:58,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:00,253 INFO L124 PetriNetUnfolderBase]: 3368/5149 cut-off events. [2024-06-21 19:00:00,253 INFO L125 PetriNetUnfolderBase]: For 251075/251075 co-relation queries the response was YES. [2024-06-21 19:00:00,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41130 conditions, 5149 events. 3368/5149 cut-off events. For 251075/251075 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 27286 event pairs, 1305 based on Foata normal form. 4/5148 useless extension candidates. Maximal degree in co-relation 41029. Up to 4476 conditions per place. [2024-06-21 19:00:00,305 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 142 changer transitions 0/395 dead transitions. [2024-06-21 19:00:00,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 395 transitions, 7326 flow [2024-06-21 19:00:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:00:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:00:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 19:00:00,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 19:00:00,306 INFO L175 Difference]: Start difference. First operand has 204 places, 345 transitions, 5966 flow. Second operand 8 states and 151 transitions. [2024-06-21 19:00:00,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 395 transitions, 7326 flow [2024-06-21 19:00:00,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 395 transitions, 7060 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 19:00:00,849 INFO L231 Difference]: Finished difference. Result has 207 places, 364 transitions, 6434 flow [2024-06-21 19:00:00,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5715, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6434, PETRI_PLACES=207, PETRI_TRANSITIONS=364} [2024-06-21 19:00:00,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 19:00:00,850 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 364 transitions, 6434 flow [2024-06-21 19:00:00,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:00,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:00,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:00,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:00:00,850 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:00,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:00,851 INFO L85 PathProgramCache]: Analyzing trace with hash 66337593, now seen corresponding path program 6 times [2024-06-21 19:00:00,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:00,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534240562] [2024-06-21 19:00:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:00,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:02,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534240562] [2024-06-21 19:00:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534240562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:02,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:02,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:00:02,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582898922] [2024-06-21 19:00:02,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:02,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:00:02,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:00:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:00:03,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:00:03,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 364 transitions, 6434 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:03,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:03,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:00:03,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:04,167 INFO L124 PetriNetUnfolderBase]: 3396/5186 cut-off events. [2024-06-21 19:00:04,168 INFO L125 PetriNetUnfolderBase]: For 263388/263388 co-relation queries the response was YES. [2024-06-21 19:00:04,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41784 conditions, 5186 events. 3396/5186 cut-off events. For 263388/263388 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27443 event pairs, 1303 based on Foata normal form. 4/5185 useless extension candidates. Maximal degree in co-relation 41682. Up to 4292 conditions per place. [2024-06-21 19:00:04,225 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 232 selfloop transitions, 158 changer transitions 0/397 dead transitions. [2024-06-21 19:00:04,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 397 transitions, 7406 flow [2024-06-21 19:00:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:00:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:00:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 19:00:04,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 19:00:04,227 INFO L175 Difference]: Start difference. First operand has 207 places, 364 transitions, 6434 flow. Second operand 9 states and 160 transitions. [2024-06-21 19:00:04,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 397 transitions, 7406 flow [2024-06-21 19:00:04,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 397 transitions, 7157 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 19:00:04,724 INFO L231 Difference]: Finished difference. Result has 212 places, 368 transitions, 6585 flow [2024-06-21 19:00:04,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6585, PETRI_PLACES=212, PETRI_TRANSITIONS=368} [2024-06-21 19:00:04,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 19:00:04,725 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 368 transitions, 6585 flow [2024-06-21 19:00:04,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:04,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:04,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:00:04,725 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:04,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1269562999, now seen corresponding path program 4 times [2024-06-21 19:00:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:04,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048053529] [2024-06-21 19:00:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:04,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:06,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:06,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048053529] [2024-06-21 19:00:06,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048053529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:06,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:06,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:06,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745279003] [2024-06-21 19:00:06,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:06,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:06,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:06,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:06,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:06,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:00:06,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 368 transitions, 6585 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:06,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:06,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:00:06,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:07,413 INFO L124 PetriNetUnfolderBase]: 3569/5395 cut-off events. [2024-06-21 19:00:07,414 INFO L125 PetriNetUnfolderBase]: For 277026/277030 co-relation queries the response was YES. [2024-06-21 19:00:07,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43441 conditions, 5395 events. 3569/5395 cut-off events. For 277026/277030 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28214 event pairs, 1431 based on Foata normal form. 6/5400 useless extension candidates. Maximal degree in co-relation 43338. Up to 5104 conditions per place. [2024-06-21 19:00:07,476 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 79 changer transitions 0/406 dead transitions. [2024-06-21 19:00:07,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 406 transitions, 7874 flow [2024-06-21 19:00:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:00:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:00:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 19:00:07,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 19:00:07,477 INFO L175 Difference]: Start difference. First operand has 212 places, 368 transitions, 6585 flow. Second operand 7 states and 127 transitions. [2024-06-21 19:00:07,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 406 transitions, 7874 flow [2024-06-21 19:00:07,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 406 transitions, 7520 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 19:00:08,008 INFO L231 Difference]: Finished difference. Result has 214 places, 388 transitions, 6756 flow [2024-06-21 19:00:08,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6235, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6756, PETRI_PLACES=214, PETRI_TRANSITIONS=388} [2024-06-21 19:00:08,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 19:00:08,011 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 388 transitions, 6756 flow [2024-06-21 19:00:08,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:08,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:08,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:08,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:00:08,016 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:08,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:08,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1269861901, now seen corresponding path program 2 times [2024-06-21 19:00:08,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:08,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157552492] [2024-06-21 19:00:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:08,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:09,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:09,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157552492] [2024-06-21 19:00:09,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157552492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:09,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:09,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843478593] [2024-06-21 19:00:09,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:09,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:09,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:00:09,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 388 transitions, 6756 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:09,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:09,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:00:09,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:10,830 INFO L124 PetriNetUnfolderBase]: 3579/5402 cut-off events. [2024-06-21 19:00:10,830 INFO L125 PetriNetUnfolderBase]: For 285388/285388 co-relation queries the response was YES. [2024-06-21 19:00:10,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43661 conditions, 5402 events. 3579/5402 cut-off events. For 285388/285388 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28195 event pairs, 1458 based on Foata normal form. 1/5402 useless extension candidates. Maximal degree in co-relation 43555. Up to 5304 conditions per place. [2024-06-21 19:00:10,886 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 370 selfloop transitions, 34 changer transitions 0/407 dead transitions. [2024-06-21 19:00:10,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 407 transitions, 7757 flow [2024-06-21 19:00:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:00:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:00:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 19:00:10,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:00:10,887 INFO L175 Difference]: Start difference. First operand has 214 places, 388 transitions, 6756 flow. Second operand 8 states and 126 transitions. [2024-06-21 19:00:10,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 407 transitions, 7757 flow [2024-06-21 19:00:11,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 407 transitions, 7663 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 19:00:11,303 INFO L231 Difference]: Finished difference. Result has 219 places, 394 transitions, 6813 flow [2024-06-21 19:00:11,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6662, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6813, PETRI_PLACES=219, PETRI_TRANSITIONS=394} [2024-06-21 19:00:11,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 19:00:11,304 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 394 transitions, 6813 flow [2024-06-21 19:00:11,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:11,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:11,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:11,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:00:11,304 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:11,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1859542193, now seen corresponding path program 5 times [2024-06-21 19:00:11,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:11,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636195474] [2024-06-21 19:00:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:11,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:12,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:12,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636195474] [2024-06-21 19:00:12,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636195474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:12,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:12,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676056653] [2024-06-21 19:00:12,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:12,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:12,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:12,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:00:12,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 394 transitions, 6813 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:12,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:12,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:00:12,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:14,030 INFO L124 PetriNetUnfolderBase]: 3607/5447 cut-off events. [2024-06-21 19:00:14,030 INFO L125 PetriNetUnfolderBase]: For 298997/299001 co-relation queries the response was YES. [2024-06-21 19:00:14,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44197 conditions, 5447 events. 3607/5447 cut-off events. For 298997/299001 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28516 event pairs, 1436 based on Foata normal form. 6/5452 useless extension candidates. Maximal degree in co-relation 44090. Up to 5146 conditions per place. [2024-06-21 19:00:14,089 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 78 changer transitions 0/417 dead transitions. [2024-06-21 19:00:14,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 417 transitions, 8017 flow [2024-06-21 19:00:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:00:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:00:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 19:00:14,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 19:00:14,090 INFO L175 Difference]: Start difference. First operand has 219 places, 394 transitions, 6813 flow. Second operand 7 states and 123 transitions. [2024-06-21 19:00:14,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 417 transitions, 8017 flow [2024-06-21 19:00:14,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 417 transitions, 7931 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 19:00:14,576 INFO L231 Difference]: Finished difference. Result has 223 places, 403 transitions, 7135 flow [2024-06-21 19:00:14,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6727, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7135, PETRI_PLACES=223, PETRI_TRANSITIONS=403} [2024-06-21 19:00:14,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 19:00:14,577 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 403 transitions, 7135 flow [2024-06-21 19:00:14,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:14,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:14,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:14,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:00:14,577 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 19:00:14,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash 543644123, now seen corresponding path program 7 times [2024-06-21 19:00:14,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:14,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149442916] [2024-06-21 19:00:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:14,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:16,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:16,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149442916] [2024-06-21 19:00:16,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149442916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:16,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:16,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:00:16,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104647580] [2024-06-21 19:00:16,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:16,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:00:16,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:16,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:00:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:00:16,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:00:16,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 403 transitions, 7135 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:16,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:16,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:00:16,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:17,939 INFO L124 PetriNetUnfolderBase]: 3529/5379 cut-off events. [2024-06-21 19:00:17,939 INFO L125 PetriNetUnfolderBase]: For 317713/317713 co-relation queries the response was YES. [2024-06-21 19:00:17,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44962 conditions, 5379 events. 3529/5379 cut-off events. For 317713/317713 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 28624 event pairs, 1346 based on Foata normal form. 4/5378 useless extension candidates. Maximal degree in co-relation 44852. Up to 4370 conditions per place. [2024-06-21 19:00:17,997 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 165 changer transitions 0/432 dead transitions. [2024-06-21 19:00:17,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 432 transitions, 8339 flow [2024-06-21 19:00:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:00:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:00:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 19:00:17,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 19:00:17,999 INFO L175 Difference]: Start difference. First operand has 223 places, 403 transitions, 7135 flow. Second operand 8 states and 145 transitions. [2024-06-21 19:00:17,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 432 transitions, 8339 flow [2024-06-21 19:00:18,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 432 transitions, 8231 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 19:00:18,542 INFO L231 Difference]: Finished difference. Result has 228 places, 407 transitions, 7490 flow [2024-06-21 19:00:18,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7027, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7490, PETRI_PLACES=228, PETRI_TRANSITIONS=407} [2024-06-21 19:00:18,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 19:00:18,544 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 407 transitions, 7490 flow [2024-06-21 19:00:18,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:18,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:18,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:18,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:00:18,544 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:18,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:18,545 INFO L85 PathProgramCache]: Analyzing trace with hash 543636683, now seen corresponding path program 8 times [2024-06-21 19:00:18,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:18,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994289146] [2024-06-21 19:00:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:20,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:20,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994289146] [2024-06-21 19:00:20,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994289146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:20,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:20,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:00:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832394819] [2024-06-21 19:00:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:20,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:00:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:00:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:00:20,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:00:20,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 407 transitions, 7490 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:20,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:20,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:00:20,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:21,972 INFO L124 PetriNetUnfolderBase]: 3521/5366 cut-off events. [2024-06-21 19:00:21,972 INFO L125 PetriNetUnfolderBase]: For 331219/331223 co-relation queries the response was YES. [2024-06-21 19:00:22,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45541 conditions, 5366 events. 3521/5366 cut-off events. For 331219/331223 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28567 event pairs, 1383 based on Foata normal form. 8/5369 useless extension candidates. Maximal degree in co-relation 45430. Up to 5057 conditions per place. [2024-06-21 19:00:22,034 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 381 selfloop transitions, 48 changer transitions 0/438 dead transitions. [2024-06-21 19:00:22,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 438 transitions, 8518 flow [2024-06-21 19:00:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:00:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:00:22,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 19:00:22,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 19:00:22,036 INFO L175 Difference]: Start difference. First operand has 228 places, 407 transitions, 7490 flow. Second operand 8 states and 145 transitions. [2024-06-21 19:00:22,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 438 transitions, 8518 flow [2024-06-21 19:00:22,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 438 transitions, 8309 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 19:00:22,617 INFO L231 Difference]: Finished difference. Result has 232 places, 407 transitions, 7387 flow [2024-06-21 19:00:22,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7281, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7387, PETRI_PLACES=232, PETRI_TRANSITIONS=407} [2024-06-21 19:00:22,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-21 19:00:22,617 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 407 transitions, 7387 flow [2024-06-21 19:00:22,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:22,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:22,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:22,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:00:22,618 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:22,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:22,618 INFO L85 PathProgramCache]: Analyzing trace with hash 552840893, now seen corresponding path program 9 times [2024-06-21 19:00:22,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:22,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884345848] [2024-06-21 19:00:22,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:22,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:24,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:24,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884345848] [2024-06-21 19:00:24,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884345848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:24,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:24,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:00:24,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110980091] [2024-06-21 19:00:24,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:24,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:00:24,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:00:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:00:24,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:00:24,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 407 transitions, 7387 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:24,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:24,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:00:24,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:25,619 INFO L124 PetriNetUnfolderBase]: 3513/5354 cut-off events. [2024-06-21 19:00:25,619 INFO L125 PetriNetUnfolderBase]: For 336563/336567 co-relation queries the response was YES. [2024-06-21 19:00:25,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45501 conditions, 5354 events. 3513/5354 cut-off events. For 336563/336567 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28442 event pairs, 1361 based on Foata normal form. 8/5357 useless extension candidates. Maximal degree in co-relation 45388. Up to 5096 conditions per place. [2024-06-21 19:00:25,677 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 23 changer transitions 0/434 dead transitions. [2024-06-21 19:00:25,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 434 transitions, 8399 flow [2024-06-21 19:00:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:00:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:00:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 19:00:25,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 19:00:25,679 INFO L175 Difference]: Start difference. First operand has 232 places, 407 transitions, 7387 flow. Second operand 9 states and 152 transitions. [2024-06-21 19:00:25,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 434 transitions, 8399 flow [2024-06-21 19:00:26,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 434 transitions, 8094 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 19:00:26,221 INFO L231 Difference]: Finished difference. Result has 233 places, 409 transitions, 7199 flow [2024-06-21 19:00:26,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7082, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7199, PETRI_PLACES=233, PETRI_TRANSITIONS=409} [2024-06-21 19:00:26,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 19:00:26,221 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 409 transitions, 7199 flow [2024-06-21 19:00:26,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:26,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:26,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:26,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:00:26,222 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:26,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:26,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1504863071, now seen corresponding path program 3 times [2024-06-21 19:00:26,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:26,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608409760] [2024-06-21 19:00:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:26,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:27,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:27,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608409760] [2024-06-21 19:00:27,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608409760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:27,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:27,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:27,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951004465] [2024-06-21 19:00:27,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:27,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:27,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:27,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:27,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:00:27,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 409 transitions, 7199 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:27,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:27,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:00:27,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:28,814 INFO L124 PetriNetUnfolderBase]: 3638/5488 cut-off events. [2024-06-21 19:00:28,814 INFO L125 PetriNetUnfolderBase]: For 345425/345425 co-relation queries the response was YES. [2024-06-21 19:00:28,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46030 conditions, 5488 events. 3638/5488 cut-off events. For 345425/345425 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28660 event pairs, 1467 based on Foata normal form. 1/5488 useless extension candidates. Maximal degree in co-relation 45918. Up to 5423 conditions per place. [2024-06-21 19:00:28,875 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 402 selfloop transitions, 16 changer transitions 0/421 dead transitions. [2024-06-21 19:00:28,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 421 transitions, 8120 flow [2024-06-21 19:00:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:00:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:00:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 19:00:28,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-21 19:00:28,876 INFO L175 Difference]: Start difference. First operand has 233 places, 409 transitions, 7199 flow. Second operand 7 states and 109 transitions. [2024-06-21 19:00:28,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 421 transitions, 8120 flow [2024-06-21 19:00:29,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 421 transitions, 8021 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 19:00:29,482 INFO L231 Difference]: Finished difference. Result has 233 places, 412 transitions, 7199 flow [2024-06-21 19:00:29,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7100, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7199, PETRI_PLACES=233, PETRI_TRANSITIONS=412} [2024-06-21 19:00:29,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 19:00:29,483 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 412 transitions, 7199 flow [2024-06-21 19:00:29,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:29,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:29,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:29,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:00:29,484 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:29,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1069560499, now seen corresponding path program 6 times [2024-06-21 19:00:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:29,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096036562] [2024-06-21 19:00:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:30,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:30,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096036562] [2024-06-21 19:00:30,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096036562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:30,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:30,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:30,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469565774] [2024-06-21 19:00:30,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:30,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:30,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:30,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:30,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:00:30,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 412 transitions, 7199 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:30,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:30,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:00:30,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:32,089 INFO L124 PetriNetUnfolderBase]: 3634/5484 cut-off events. [2024-06-21 19:00:32,089 INFO L125 PetriNetUnfolderBase]: For 355373/355377 co-relation queries the response was YES. [2024-06-21 19:00:32,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45952 conditions, 5484 events. 3634/5484 cut-off events. For 355373/355377 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28674 event pairs, 1458 based on Foata normal form. 6/5489 useless extension candidates. Maximal degree in co-relation 45839. Up to 5383 conditions per place. [2024-06-21 19:00:32,149 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 389 selfloop transitions, 30 changer transitions 0/422 dead transitions. [2024-06-21 19:00:32,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 422 transitions, 8165 flow [2024-06-21 19:00:32,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:00:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:00:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 19:00:32,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 19:00:32,150 INFO L175 Difference]: Start difference. First operand has 233 places, 412 transitions, 7199 flow. Second operand 7 states and 115 transitions. [2024-06-21 19:00:32,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 422 transitions, 8165 flow [2024-06-21 19:00:32,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 422 transitions, 8077 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 19:00:32,884 INFO L231 Difference]: Finished difference. Result has 235 places, 412 transitions, 7179 flow [2024-06-21 19:00:32,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7111, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7179, PETRI_PLACES=235, PETRI_TRANSITIONS=412} [2024-06-21 19:00:32,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 19:00:32,885 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 412 transitions, 7179 flow [2024-06-21 19:00:32,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:32,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:32,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:32,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:00:32,885 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:32,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:32,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1849364831, now seen corresponding path program 4 times [2024-06-21 19:00:32,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:32,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089818288] [2024-06-21 19:00:32,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:32,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:34,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:34,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089818288] [2024-06-21 19:00:34,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089818288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:34,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:34,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:34,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051953896] [2024-06-21 19:00:34,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:34,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:34,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:34,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:00:34,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 412 transitions, 7179 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:34,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:34,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:00:34,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:35,727 INFO L124 PetriNetUnfolderBase]: 3631/5479 cut-off events. [2024-06-21 19:00:35,728 INFO L125 PetriNetUnfolderBase]: For 365801/365801 co-relation queries the response was YES. [2024-06-21 19:00:35,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46123 conditions, 5479 events. 3631/5479 cut-off events. For 365801/365801 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 28646 event pairs, 1465 based on Foata normal form. 1/5479 useless extension candidates. Maximal degree in co-relation 46009. Up to 5408 conditions per place. [2024-06-21 19:00:35,785 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 21 changer transitions 0/421 dead transitions. [2024-06-21 19:00:35,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 421 transitions, 8045 flow [2024-06-21 19:00:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:00:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:00:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 19:00:35,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 19:00:35,786 INFO L175 Difference]: Start difference. First operand has 235 places, 412 transitions, 7179 flow. Second operand 7 states and 111 transitions. [2024-06-21 19:00:35,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 421 transitions, 8045 flow [2024-06-21 19:00:36,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 421 transitions, 7917 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 19:00:36,410 INFO L231 Difference]: Finished difference. Result has 237 places, 412 transitions, 7099 flow [2024-06-21 19:00:36,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7099, PETRI_PLACES=237, PETRI_TRANSITIONS=412} [2024-06-21 19:00:36,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 19:00:36,411 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 412 transitions, 7099 flow [2024-06-21 19:00:36,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:36,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:36,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:36,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:00:36,412 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:36,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:36,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1063311457, now seen corresponding path program 1 times [2024-06-21 19:00:36,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:36,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295320305] [2024-06-21 19:00:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:36,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:38,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:38,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295320305] [2024-06-21 19:00:38,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295320305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:38,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:38,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:38,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692407231] [2024-06-21 19:00:38,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:38,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:38,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:38,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:38,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:38,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:00:38,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 412 transitions, 7099 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 19:00:38,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:38,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:00:38,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:39,892 INFO L124 PetriNetUnfolderBase]: 3526/5373 cut-off events. [2024-06-21 19:00:39,892 INFO L125 PetriNetUnfolderBase]: For 379956/379956 co-relation queries the response was YES. [2024-06-21 19:00:39,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45701 conditions, 5373 events. 3526/5373 cut-off events. For 379956/379956 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28544 event pairs, 1392 based on Foata normal form. 2/5370 useless extension candidates. Maximal degree in co-relation 45587. Up to 5167 conditions per place. [2024-06-21 19:00:39,955 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 399 selfloop transitions, 24 changer transitions 0/433 dead transitions. [2024-06-21 19:00:39,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 433 transitions, 8069 flow [2024-06-21 19:00:39,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:00:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:00:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 19:00:39,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 19:00:39,957 INFO L175 Difference]: Start difference. First operand has 237 places, 412 transitions, 7099 flow. Second operand 8 states and 134 transitions. [2024-06-21 19:00:39,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 433 transitions, 8069 flow [2024-06-21 19:00:40,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 433 transitions, 7994 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:00:40,824 INFO L231 Difference]: Finished difference. Result has 239 places, 418 transitions, 7161 flow [2024-06-21 19:00:40,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7161, PETRI_PLACES=239, PETRI_TRANSITIONS=418} [2024-06-21 19:00:40,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 19:00:40,824 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 418 transitions, 7161 flow [2024-06-21 19:00:40,825 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 19:00:40,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:40,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:40,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:00:40,825 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:40,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1682225975, now seen corresponding path program 2 times [2024-06-21 19:00:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:40,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856297603] [2024-06-21 19:00:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:40,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:42,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:42,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856297603] [2024-06-21 19:00:42,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856297603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:42,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:42,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:42,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726901675] [2024-06-21 19:00:42,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:42,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:42,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:42,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:00:42,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 418 transitions, 7161 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 19:00:42,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:42,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:00:42,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:44,354 INFO L124 PetriNetUnfolderBase]: 3536/5395 cut-off events. [2024-06-21 19:00:44,354 INFO L125 PetriNetUnfolderBase]: For 392653/392653 co-relation queries the response was YES. [2024-06-21 19:00:44,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46458 conditions, 5395 events. 3536/5395 cut-off events. For 392653/392653 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28708 event pairs, 1393 based on Foata normal form. 2/5396 useless extension candidates. Maximal degree in co-relation 46343. Up to 5155 conditions per place. [2024-06-21 19:00:44,420 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 395 selfloop transitions, 35 changer transitions 0/440 dead transitions. [2024-06-21 19:00:44,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 440 transitions, 8273 flow [2024-06-21 19:00:44,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:00:44,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:00:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:00:44,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:00:44,421 INFO L175 Difference]: Start difference. First operand has 239 places, 418 transitions, 7161 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:00:44,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 440 transitions, 8273 flow [2024-06-21 19:00:45,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 440 transitions, 8210 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:00:45,098 INFO L231 Difference]: Finished difference. Result has 240 places, 424 transitions, 7267 flow [2024-06-21 19:00:45,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7098, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7267, PETRI_PLACES=240, PETRI_TRANSITIONS=424} [2024-06-21 19:00:45,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 19:00:45,099 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 424 transitions, 7267 flow [2024-06-21 19:00:45,099 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 19:00:45,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:45,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:45,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:00:45,099 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:45,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:45,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1682225789, now seen corresponding path program 1 times [2024-06-21 19:00:45,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:45,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26334429] [2024-06-21 19:00:45,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:45,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:47,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:47,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26334429] [2024-06-21 19:00:47,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26334429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:47,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:47,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:47,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798994858] [2024-06-21 19:00:47,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:47,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:47,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:47,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:47,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:47,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:00:47,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 424 transitions, 7267 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:47,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:47,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:00:47,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:48,558 INFO L124 PetriNetUnfolderBase]: 3661/5522 cut-off events. [2024-06-21 19:00:48,558 INFO L125 PetriNetUnfolderBase]: For 405676/405676 co-relation queries the response was YES. [2024-06-21 19:00:48,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47759 conditions, 5522 events. 3661/5522 cut-off events. For 405676/405676 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28852 event pairs, 1463 based on Foata normal form. 1/5522 useless extension candidates. Maximal degree in co-relation 47642. Up to 5428 conditions per place. [2024-06-21 19:00:48,626 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 31 changer transitions 0/442 dead transitions. [2024-06-21 19:00:48,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 442 transitions, 8363 flow [2024-06-21 19:00:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:00:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:00:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 19:00:48,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 19:00:48,627 INFO L175 Difference]: Start difference. First operand has 240 places, 424 transitions, 7267 flow. Second operand 7 states and 117 transitions. [2024-06-21 19:00:48,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 442 transitions, 8363 flow [2024-06-21 19:00:49,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 442 transitions, 8338 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 19:00:49,505 INFO L231 Difference]: Finished difference. Result has 245 places, 430 transitions, 7395 flow [2024-06-21 19:00:49,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7242, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7395, PETRI_PLACES=245, PETRI_TRANSITIONS=430} [2024-06-21 19:00:49,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 19:00:49,506 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 430 transitions, 7395 flow [2024-06-21 19:00:49,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:49,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:49,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:49,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:00:49,506 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:49,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:49,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1596152167, now seen corresponding path program 3 times [2024-06-21 19:00:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:49,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454030564] [2024-06-21 19:00:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:49,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:51,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:51,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454030564] [2024-06-21 19:00:51,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454030564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:51,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:51,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:51,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073361479] [2024-06-21 19:00:51,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:51,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:51,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:51,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:51,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:51,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:00:51,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 430 transitions, 7395 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 19:00:51,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:51,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:00:51,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:52,938 INFO L124 PetriNetUnfolderBase]: 3547/5407 cut-off events. [2024-06-21 19:00:52,938 INFO L125 PetriNetUnfolderBase]: For 420775/420775 co-relation queries the response was YES. [2024-06-21 19:00:52,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47705 conditions, 5407 events. 3547/5407 cut-off events. For 420775/420775 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28689 event pairs, 1399 based on Foata normal form. 2/5408 useless extension candidates. Maximal degree in co-relation 47584. Up to 5167 conditions per place. [2024-06-21 19:00:53,005 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 395 selfloop transitions, 34 changer transitions 0/441 dead transitions. [2024-06-21 19:00:53,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 441 transitions, 8295 flow [2024-06-21 19:00:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:00:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:00:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 19:00:53,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 19:00:53,007 INFO L175 Difference]: Start difference. First operand has 245 places, 430 transitions, 7395 flow. Second operand 7 states and 122 transitions. [2024-06-21 19:00:53,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 441 transitions, 8295 flow [2024-06-21 19:00:53,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 441 transitions, 8217 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 19:00:53,773 INFO L231 Difference]: Finished difference. Result has 247 places, 430 transitions, 7393 flow [2024-06-21 19:00:53,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7317, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7393, PETRI_PLACES=247, PETRI_TRANSITIONS=430} [2024-06-21 19:00:53,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 19:00:53,774 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 430 transitions, 7393 flow [2024-06-21 19:00:53,774 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 19:00:53,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:53,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:53,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:00:53,775 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:53,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1069982533, now seen corresponding path program 2 times [2024-06-21 19:00:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:53,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033172125] [2024-06-21 19:00:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:53,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:00:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:00:55,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:00:55,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033172125] [2024-06-21 19:00:55,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033172125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:00:55,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:00:55,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:00:55,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398239164] [2024-06-21 19:00:55,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:00:55,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:00:55,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:00:55,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:00:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:00:55,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:00:55,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 430 transitions, 7393 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:55,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:00:55,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:00:55,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:00:57,207 INFO L124 PetriNetUnfolderBase]: 3660/5521 cut-off events. [2024-06-21 19:00:57,207 INFO L125 PetriNetUnfolderBase]: For 431761/431765 co-relation queries the response was YES. [2024-06-21 19:00:57,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48613 conditions, 5521 events. 3660/5521 cut-off events. For 431761/431765 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28826 event pairs, 1455 based on Foata normal form. 5/5525 useless extension candidates. Maximal degree in co-relation 48489. Up to 5426 conditions per place. [2024-06-21 19:00:57,270 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 405 selfloop transitions, 35 changer transitions 0/443 dead transitions. [2024-06-21 19:00:57,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 443 transitions, 8453 flow [2024-06-21 19:00:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:00:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:00:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 19:00:57,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 19:00:57,272 INFO L175 Difference]: Start difference. First operand has 247 places, 430 transitions, 7393 flow. Second operand 7 states and 113 transitions. [2024-06-21 19:00:57,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 443 transitions, 8453 flow [2024-06-21 19:00:58,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 443 transitions, 8378 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 19:00:58,128 INFO L231 Difference]: Finished difference. Result has 249 places, 433 transitions, 7436 flow [2024-06-21 19:00:58,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7318, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7436, PETRI_PLACES=249, PETRI_TRANSITIONS=433} [2024-06-21 19:00:58,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-21 19:00:58,129 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 433 transitions, 7436 flow [2024-06-21 19:00:58,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:00:58,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:00:58,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:00:58,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:00:58,130 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:00:58,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:00:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1069745383, now seen corresponding path program 3 times [2024-06-21 19:00:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:00:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627461749] [2024-06-21 19:00:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:00:58,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:00:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:00,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:00,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627461749] [2024-06-21 19:01:00,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627461749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:00,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:00,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:01:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842382023] [2024-06-21 19:01:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:00,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:01:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:01:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:01:00,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:01:00,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 433 transitions, 7436 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:00,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:00,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:01:00,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:01,543 INFO L124 PetriNetUnfolderBase]: 3657/5517 cut-off events. [2024-06-21 19:01:01,544 INFO L125 PetriNetUnfolderBase]: For 443674/443678 co-relation queries the response was YES. [2024-06-21 19:01:01,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48758 conditions, 5517 events. 3657/5517 cut-off events. For 443674/443678 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 28807 event pairs, 1455 based on Foata normal form. 5/5521 useless extension candidates. Maximal degree in co-relation 48632. Up to 5423 conditions per place. [2024-06-21 19:01:01,610 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 33 changer transitions 0/442 dead transitions. [2024-06-21 19:01:01,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 442 transitions, 8344 flow [2024-06-21 19:01:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:01:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:01:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 19:01:01,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 19:01:01,611 INFO L175 Difference]: Start difference. First operand has 249 places, 433 transitions, 7436 flow. Second operand 7 states and 113 transitions. [2024-06-21 19:01:01,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 442 transitions, 8344 flow [2024-06-21 19:01:02,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 442 transitions, 8233 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 19:01:02,469 INFO L231 Difference]: Finished difference. Result has 252 places, 433 transitions, 7399 flow [2024-06-21 19:01:02,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7325, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7399, PETRI_PLACES=252, PETRI_TRANSITIONS=433} [2024-06-21 19:01:02,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 19:01:02,470 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 433 transitions, 7399 flow [2024-06-21 19:01:02,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:02,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:02,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:01:02,470 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:02,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1153252368, now seen corresponding path program 1 times [2024-06-21 19:01:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:02,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4284481] [2024-06-21 19:01:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:04,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:04,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4284481] [2024-06-21 19:01:04,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4284481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:04,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:04,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:01:04,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920715775] [2024-06-21 19:01:04,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:04,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:01:04,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:04,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:01:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:01:04,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:01:04,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 433 transitions, 7399 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:04,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:04,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:01:04,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:05,478 INFO L124 PetriNetUnfolderBase]: 3586/5458 cut-off events. [2024-06-21 19:01:05,479 INFO L125 PetriNetUnfolderBase]: For 460952/460963 co-relation queries the response was YES. [2024-06-21 19:01:05,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48767 conditions, 5458 events. 3586/5458 cut-off events. For 460952/460963 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28933 event pairs, 868 based on Foata normal form. 12/5469 useless extension candidates. Maximal degree in co-relation 48638. Up to 4761 conditions per place. [2024-06-21 19:01:05,543 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 339 selfloop transitions, 129 changer transitions 0/481 dead transitions. [2024-06-21 19:01:05,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 481 transitions, 8908 flow [2024-06-21 19:01:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:01:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:01:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 19:01:05,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 19:01:05,549 INFO L175 Difference]: Start difference. First operand has 252 places, 433 transitions, 7399 flow. Second operand 8 states and 158 transitions. [2024-06-21 19:01:05,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 481 transitions, 8908 flow [2024-06-21 19:01:06,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 481 transitions, 8867 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 19:01:06,279 INFO L231 Difference]: Finished difference. Result has 260 places, 453 transitions, 8044 flow [2024-06-21 19:01:06,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7358, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8044, PETRI_PLACES=260, PETRI_TRANSITIONS=453} [2024-06-21 19:01:06,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 19:01:06,280 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 453 transitions, 8044 flow [2024-06-21 19:01:06,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:06,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:06,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:06,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:01:06,280 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:06,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:06,281 INFO L85 PathProgramCache]: Analyzing trace with hash -737624844, now seen corresponding path program 1 times [2024-06-21 19:01:06,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:06,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346849168] [2024-06-21 19:01:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:06,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:08,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346849168] [2024-06-21 19:01:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346849168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:08,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:08,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:01:08,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829744093] [2024-06-21 19:01:08,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:08,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:01:08,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:08,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:01:08,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:01:09,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:09,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 453 transitions, 8044 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:09,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:09,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:09,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:10,784 INFO L124 PetriNetUnfolderBase]: 3626/5540 cut-off events. [2024-06-21 19:01:10,784 INFO L125 PetriNetUnfolderBase]: For 495649/495661 co-relation queries the response was YES. [2024-06-21 19:01:10,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50986 conditions, 5540 events. 3626/5540 cut-off events. For 495649/495661 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29663 event pairs, 969 based on Foata normal form. 22/5561 useless extension candidates. Maximal degree in co-relation 50852. Up to 4528 conditions per place. [2024-06-21 19:01:10,845 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 184 changer transitions 0/491 dead transitions. [2024-06-21 19:01:10,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 491 transitions, 9243 flow [2024-06-21 19:01:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 19:01:10,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 19:01:10,847 INFO L175 Difference]: Start difference. First operand has 260 places, 453 transitions, 8044 flow. Second operand 9 states and 179 transitions. [2024-06-21 19:01:10,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 491 transitions, 9243 flow [2024-06-21 19:01:11,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 491 transitions, 9129 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 19:01:11,605 INFO L231 Difference]: Finished difference. Result has 266 places, 454 transitions, 8349 flow [2024-06-21 19:01:11,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7930, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8349, PETRI_PLACES=266, PETRI_TRANSITIONS=454} [2024-06-21 19:01:11,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 19:01:11,606 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 454 transitions, 8349 flow [2024-06-21 19:01:11,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:11,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:11,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:11,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:01:11,606 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:11,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1026068444, now seen corresponding path program 2 times [2024-06-21 19:01:11,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:11,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567659940] [2024-06-21 19:01:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:13,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:13,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567659940] [2024-06-21 19:01:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567659940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:13,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:13,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:01:13,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366868952] [2024-06-21 19:01:13,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:13,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:01:13,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:01:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:01:14,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:14,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 454 transitions, 8349 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:14,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:14,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:14,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:15,388 INFO L124 PetriNetUnfolderBase]: 3635/5540 cut-off events. [2024-06-21 19:01:15,389 INFO L125 PetriNetUnfolderBase]: For 488654/488668 co-relation queries the response was YES. [2024-06-21 19:01:15,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51648 conditions, 5540 events. 3635/5540 cut-off events. For 488654/488668 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 29606 event pairs, 979 based on Foata normal form. 14/5551 useless extension candidates. Maximal degree in co-relation 51513. Up to 4899 conditions per place. [2024-06-21 19:01:15,462 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 140 changer transitions 0/486 dead transitions. [2024-06-21 19:01:15,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 486 transitions, 9695 flow [2024-06-21 19:01:15,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:01:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:01:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 19:01:15,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-21 19:01:15,464 INFO L175 Difference]: Start difference. First operand has 266 places, 454 transitions, 8349 flow. Second operand 8 states and 165 transitions. [2024-06-21 19:01:15,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 486 transitions, 9695 flow [2024-06-21 19:01:16,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 486 transitions, 9296 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 19:01:16,492 INFO L231 Difference]: Finished difference. Result has 268 places, 459 transitions, 8334 flow [2024-06-21 19:01:16,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7950, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8334, PETRI_PLACES=268, PETRI_TRANSITIONS=459} [2024-06-21 19:01:16,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 19:01:16,493 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 459 transitions, 8334 flow [2024-06-21 19:01:16,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:16,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:16,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:16,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:01:16,493 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:16,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1009164423, now seen corresponding path program 1 times [2024-06-21 19:01:16,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:16,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944390912] [2024-06-21 19:01:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:16,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:18,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:18,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944390912] [2024-06-21 19:01:18,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944390912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:18,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:18,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:01:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567839003] [2024-06-21 19:01:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:18,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:01:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:18,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:01:18,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:01:18,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:01:18,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 459 transitions, 8334 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:18,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:18,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:01:18,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:19,981 INFO L124 PetriNetUnfolderBase]: 3763/5676 cut-off events. [2024-06-21 19:01:19,982 INFO L125 PetriNetUnfolderBase]: For 500054/500069 co-relation queries the response was YES. [2024-06-21 19:01:20,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52476 conditions, 5676 events. 3763/5676 cut-off events. For 500054/500069 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 29817 event pairs, 1040 based on Foata normal form. 16/5691 useless extension candidates. Maximal degree in co-relation 52339. Up to 5136 conditions per place. [2024-06-21 19:01:20,058 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 353 selfloop transitions, 141 changer transitions 0/497 dead transitions. [2024-06-21 19:01:20,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 497 transitions, 9864 flow [2024-06-21 19:01:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:01:20,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 19:01:20,059 INFO L175 Difference]: Start difference. First operand has 268 places, 459 transitions, 8334 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:01:20,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 497 transitions, 9864 flow [2024-06-21 19:01:21,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 497 transitions, 9578 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 19:01:21,125 INFO L231 Difference]: Finished difference. Result has 273 places, 471 transitions, 8642 flow [2024-06-21 19:01:21,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8048, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8642, PETRI_PLACES=273, PETRI_TRANSITIONS=471} [2024-06-21 19:01:21,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 19:01:21,126 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 471 transitions, 8642 flow [2024-06-21 19:01:21,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:21,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:21,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:21,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:01:21,126 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:21,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:21,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1025799674, now seen corresponding path program 3 times [2024-06-21 19:01:21,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:21,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851707310] [2024-06-21 19:01:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:21,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:23,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:23,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851707310] [2024-06-21 19:01:23,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851707310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:23,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:23,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:01:23,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250246409] [2024-06-21 19:01:23,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:23,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:01:23,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:23,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:01:23,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:01:23,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:01:23,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 471 transitions, 8642 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:23,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:23,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:01:23,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:24,904 INFO L124 PetriNetUnfolderBase]: 3676/5593 cut-off events. [2024-06-21 19:01:24,904 INFO L125 PetriNetUnfolderBase]: For 522405/522420 co-relation queries the response was YES. [2024-06-21 19:01:24,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53128 conditions, 5593 events. 3676/5593 cut-off events. For 522405/522420 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29816 event pairs, 970 based on Foata normal form. 16/5608 useless extension candidates. Maximal degree in co-relation 52989. Up to 5056 conditions per place. [2024-06-21 19:01:24,975 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 353 selfloop transitions, 131 changer transitions 0/500 dead transitions. [2024-06-21 19:01:24,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 500 transitions, 9877 flow [2024-06-21 19:01:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 19:01:24,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 19:01:24,976 INFO L175 Difference]: Start difference. First operand has 273 places, 471 transitions, 8642 flow. Second operand 9 states and 167 transitions. [2024-06-21 19:01:24,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 500 transitions, 9877 flow [2024-06-21 19:01:26,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 500 transitions, 9732 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 19:01:26,211 INFO L231 Difference]: Finished difference. Result has 278 places, 475 transitions, 8829 flow [2024-06-21 19:01:26,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8497, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8829, PETRI_PLACES=278, PETRI_TRANSITIONS=475} [2024-06-21 19:01:26,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 19:01:26,211 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 475 transitions, 8829 flow [2024-06-21 19:01:26,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:26,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:26,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:26,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:01:26,212 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:26,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash 353701610, now seen corresponding path program 1 times [2024-06-21 19:01:26,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:26,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704614297] [2024-06-21 19:01:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:26,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:28,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:28,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704614297] [2024-06-21 19:01:28,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704614297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:28,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:28,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:01:28,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275174382] [2024-06-21 19:01:28,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:28,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:01:28,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:01:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:01:28,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:01:28,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 475 transitions, 8829 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 19:01:28,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:28,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:01:28,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:30,074 INFO L124 PetriNetUnfolderBase]: 3712/5642 cut-off events. [2024-06-21 19:01:30,074 INFO L125 PetriNetUnfolderBase]: For 546896/546916 co-relation queries the response was YES. [2024-06-21 19:01:30,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54298 conditions, 5642 events. 3712/5642 cut-off events. For 546896/546916 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30033 event pairs, 996 based on Foata normal form. 22/5663 useless extension candidates. Maximal degree in co-relation 54157. Up to 5103 conditions per place. [2024-06-21 19:01:30,151 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 371 selfloop transitions, 124 changer transitions 0/511 dead transitions. [2024-06-21 19:01:30,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 511 transitions, 10566 flow [2024-06-21 19:01:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:01:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:01:30,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 19:01:30,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 19:01:30,152 INFO L175 Difference]: Start difference. First operand has 278 places, 475 transitions, 8829 flow. Second operand 8 states and 154 transitions. [2024-06-21 19:01:30,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 511 transitions, 10566 flow [2024-06-21 19:01:31,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 511 transitions, 10263 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:01:31,205 INFO L231 Difference]: Finished difference. Result has 279 places, 487 transitions, 9083 flow [2024-06-21 19:01:31,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8550, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9083, PETRI_PLACES=279, PETRI_TRANSITIONS=487} [2024-06-21 19:01:31,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 19:01:31,206 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 487 transitions, 9083 flow [2024-06-21 19:01:31,206 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 19:01:31,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:31,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:31,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:01:31,207 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:31,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash 740612652, now seen corresponding path program 2 times [2024-06-21 19:01:31,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:31,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191863364] [2024-06-21 19:01:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:31,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:34,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:34,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191863364] [2024-06-21 19:01:34,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191863364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:34,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:34,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:01:34,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696086867] [2024-06-21 19:01:34,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:34,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:01:34,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:34,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:01:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:01:34,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:34,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 487 transitions, 9083 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:34,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:34,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:34,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:36,058 INFO L124 PetriNetUnfolderBase]: 3753/5719 cut-off events. [2024-06-21 19:01:36,059 INFO L125 PetriNetUnfolderBase]: For 571637/571653 co-relation queries the response was YES. [2024-06-21 19:01:36,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54957 conditions, 5719 events. 3753/5719 cut-off events. For 571637/571653 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30642 event pairs, 979 based on Foata normal form. 26/5744 useless extension candidates. Maximal degree in co-relation 54815. Up to 4779 conditions per place. [2024-06-21 19:01:36,135 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 176 changer transitions 0/528 dead transitions. [2024-06-21 19:01:36,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 528 transitions, 10367 flow [2024-06-21 19:01:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 19:01:36,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 19:01:36,136 INFO L175 Difference]: Start difference. First operand has 279 places, 487 transitions, 9083 flow. Second operand 9 states and 178 transitions. [2024-06-21 19:01:36,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 528 transitions, 10367 flow [2024-06-21 19:01:37,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 528 transitions, 10075 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 19:01:37,440 INFO L231 Difference]: Finished difference. Result has 282 places, 488 transitions, 9195 flow [2024-06-21 19:01:37,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8791, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9195, PETRI_PLACES=282, PETRI_TRANSITIONS=488} [2024-06-21 19:01:37,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 19:01:37,441 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 488 transitions, 9195 flow [2024-06-21 19:01:37,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:37,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:37,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:37,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:01:37,442 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:37,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:37,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1256835258, now seen corresponding path program 3 times [2024-06-21 19:01:37,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:37,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493112473] [2024-06-21 19:01:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:37,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:40,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:40,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493112473] [2024-06-21 19:01:40,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493112473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:40,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:40,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:01:40,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542512480] [2024-06-21 19:01:40,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:40,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:01:40,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:01:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:01:40,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:40,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 488 transitions, 9195 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:40,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:40,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:40,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:41,860 INFO L124 PetriNetUnfolderBase]: 3794/5790 cut-off events. [2024-06-21 19:01:41,860 INFO L125 PetriNetUnfolderBase]: For 593240/593256 co-relation queries the response was YES. [2024-06-21 19:01:41,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55837 conditions, 5790 events. 3794/5790 cut-off events. For 593240/593256 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 31252 event pairs, 978 based on Foata normal form. 26/5815 useless extension candidates. Maximal degree in co-relation 55695. Up to 4518 conditions per place. [2024-06-21 19:01:41,937 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 204 changer transitions 0/526 dead transitions. [2024-06-21 19:01:41,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 526 transitions, 10443 flow [2024-06-21 19:01:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 19:01:41,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 19:01:41,939 INFO L175 Difference]: Start difference. First operand has 282 places, 488 transitions, 9195 flow. Second operand 9 states and 179 transitions. [2024-06-21 19:01:41,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 526 transitions, 10443 flow [2024-06-21 19:01:43,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 526 transitions, 10121 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 19:01:43,481 INFO L231 Difference]: Finished difference. Result has 285 places, 489 transitions, 9335 flow [2024-06-21 19:01:43,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8873, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9335, PETRI_PLACES=285, PETRI_TRANSITIONS=489} [2024-06-21 19:01:43,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 19:01:43,482 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 489 transitions, 9335 flow [2024-06-21 19:01:43,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:43,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:43,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:43,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:01:43,483 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:43,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:43,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1084114728, now seen corresponding path program 4 times [2024-06-21 19:01:43,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:43,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139986251] [2024-06-21 19:01:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:43,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:45,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:45,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139986251] [2024-06-21 19:01:45,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139986251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:45,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:45,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:01:45,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658990269] [2024-06-21 19:01:45,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:45,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:01:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:45,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:01:45,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:01:46,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:01:46,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 489 transitions, 9335 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:46,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:46,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:01:46,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:47,827 INFO L124 PetriNetUnfolderBase]: 3835/5862 cut-off events. [2024-06-21 19:01:47,828 INFO L125 PetriNetUnfolderBase]: For 612277/612288 co-relation queries the response was YES. [2024-06-21 19:01:47,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56604 conditions, 5862 events. 3835/5862 cut-off events. For 612277/612288 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31850 event pairs, 1036 based on Foata normal form. 22/5883 useless extension candidates. Maximal degree in co-relation 56461. Up to 4881 conditions per place. [2024-06-21 19:01:47,904 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 199 changer transitions 0/532 dead transitions. [2024-06-21 19:01:47,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 532 transitions, 10637 flow [2024-06-21 19:01:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 19:01:47,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-21 19:01:47,906 INFO L175 Difference]: Start difference. First operand has 285 places, 489 transitions, 9335 flow. Second operand 9 states and 183 transitions. [2024-06-21 19:01:47,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 532 transitions, 10637 flow [2024-06-21 19:01:49,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 532 transitions, 10193 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 19:01:49,269 INFO L231 Difference]: Finished difference. Result has 287 places, 490 transitions, 9346 flow [2024-06-21 19:01:49,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8891, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9346, PETRI_PLACES=287, PETRI_TRANSITIONS=490} [2024-06-21 19:01:49,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 19:01:49,270 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 490 transitions, 9346 flow [2024-06-21 19:01:49,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:49,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:49,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:49,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:01:49,271 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:49,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:49,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1549820462, now seen corresponding path program 2 times [2024-06-21 19:01:49,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:49,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990903789] [2024-06-21 19:01:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:49,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:51,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:51,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990903789] [2024-06-21 19:01:51,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990903789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:51,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:51,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:01:51,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165048041] [2024-06-21 19:01:51,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:51,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:01:51,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:51,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:01:51,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:01:51,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:01:51,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 490 transitions, 9346 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 19:01:51,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:51,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:01:51,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:52,855 INFO L124 PetriNetUnfolderBase]: 3821/5838 cut-off events. [2024-06-21 19:01:52,855 INFO L125 PetriNetUnfolderBase]: For 611418/611438 co-relation queries the response was YES. [2024-06-21 19:01:52,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56159 conditions, 5838 events. 3821/5838 cut-off events. For 611418/611438 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 31594 event pairs, 1036 based on Foata normal form. 22/5859 useless extension candidates. Maximal degree in co-relation 56015. Up to 5303 conditions per place. [2024-06-21 19:01:52,937 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 372 selfloop transitions, 122 changer transitions 0/510 dead transitions. [2024-06-21 19:01:52,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 510 transitions, 10662 flow [2024-06-21 19:01:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:01:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:01:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 19:01:52,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 19:01:52,938 INFO L175 Difference]: Start difference. First operand has 287 places, 490 transitions, 9346 flow. Second operand 8 states and 149 transitions. [2024-06-21 19:01:52,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 510 transitions, 10662 flow [2024-06-21 19:01:54,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 510 transitions, 10283 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 19:01:54,427 INFO L231 Difference]: Finished difference. Result has 289 places, 490 transitions, 9230 flow [2024-06-21 19:01:54,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8967, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9230, PETRI_PLACES=289, PETRI_TRANSITIONS=490} [2024-06-21 19:01:54,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 19:01:54,428 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 490 transitions, 9230 flow [2024-06-21 19:01:54,428 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 19:01:54,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:54,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:54,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:01:54,429 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:54,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:54,429 INFO L85 PathProgramCache]: Analyzing trace with hash 285331785, now seen corresponding path program 2 times [2024-06-21 19:01:54,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:54,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950421174] [2024-06-21 19:01:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:54,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:01:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:01:56,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:01:56,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950421174] [2024-06-21 19:01:56,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950421174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:01:56,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:01:56,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:01:56,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132773754] [2024-06-21 19:01:56,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:01:56,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:01:56,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:01:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:01:56,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:01:56,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:01:56,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 490 transitions, 9230 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:56,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:01:56,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:01:56,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:01:58,699 INFO L124 PetriNetUnfolderBase]: 3970/6005 cut-off events. [2024-06-21 19:01:58,700 INFO L125 PetriNetUnfolderBase]: For 625036/625051 co-relation queries the response was YES. [2024-06-21 19:01:58,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57181 conditions, 6005 events. 3970/6005 cut-off events. For 625036/625051 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 32130 event pairs, 1102 based on Foata normal form. 16/6020 useless extension candidates. Maximal degree in co-relation 57036. Up to 5426 conditions per place. [2024-06-21 19:01:58,774 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 383 selfloop transitions, 145 changer transitions 0/531 dead transitions. [2024-06-21 19:01:58,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 531 transitions, 10985 flow [2024-06-21 19:01:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:01:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:01:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 19:01:58,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 19:01:58,775 INFO L175 Difference]: Start difference. First operand has 289 places, 490 transitions, 9230 flow. Second operand 9 states and 165 transitions. [2024-06-21 19:01:58,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 531 transitions, 10985 flow [2024-06-21 19:01:59,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 531 transitions, 10779 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 19:01:59,964 INFO L231 Difference]: Finished difference. Result has 293 places, 506 transitions, 9619 flow [2024-06-21 19:01:59,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9024, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9619, PETRI_PLACES=293, PETRI_TRANSITIONS=506} [2024-06-21 19:01:59,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 19:01:59,965 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 506 transitions, 9619 flow [2024-06-21 19:01:59,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:01:59,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:01:59,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:01:59,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:01:59,965 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:01:59,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:01:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash 904095210, now seen corresponding path program 4 times [2024-06-21 19:01:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:01:59,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045936142] [2024-06-21 19:01:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:01:59,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:01:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:02,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:02,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045936142] [2024-06-21 19:02:02,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045936142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:02,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:02,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:02,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852328949] [2024-06-21 19:02:02,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:02,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:02,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:02,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:02,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:02,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:02:02,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 506 transitions, 9619 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:02,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:02,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:02:02,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:03,827 INFO L124 PetriNetUnfolderBase]: 3883/5923 cut-off events. [2024-06-21 19:02:03,828 INFO L125 PetriNetUnfolderBase]: For 645531/645546 co-relation queries the response was YES. [2024-06-21 19:02:03,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57368 conditions, 5923 events. 3883/5923 cut-off events. For 645531/645546 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 32104 event pairs, 1029 based on Foata normal form. 16/5938 useless extension candidates. Maximal degree in co-relation 57221. Up to 5343 conditions per place. [2024-06-21 19:02:03,918 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 147 changer transitions 0/531 dead transitions. [2024-06-21 19:02:03,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 531 transitions, 10918 flow [2024-06-21 19:02:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:02:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:02:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 19:02:03,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 19:02:03,919 INFO L175 Difference]: Start difference. First operand has 293 places, 506 transitions, 9619 flow. Second operand 8 states and 157 transitions. [2024-06-21 19:02:03,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 531 transitions, 10918 flow [2024-06-21 19:02:05,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 531 transitions, 10732 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 19:02:05,139 INFO L231 Difference]: Finished difference. Result has 297 places, 510 transitions, 9812 flow [2024-06-21 19:02:05,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9433, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9812, PETRI_PLACES=297, PETRI_TRANSITIONS=510} [2024-06-21 19:02:05,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-21 19:02:05,139 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 510 transitions, 9812 flow [2024-06-21 19:02:05,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:05,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:05,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:05,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:02:05,140 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:05,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1429032191, now seen corresponding path program 3 times [2024-06-21 19:02:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:05,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161413628] [2024-06-21 19:02:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:05,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:07,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161413628] [2024-06-21 19:02:07,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161413628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:07,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:07,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:07,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397799166] [2024-06-21 19:02:07,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:07,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:07,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:07,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:07,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:07,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:02:07,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 510 transitions, 9812 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:07,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:07,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:02:07,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:09,375 INFO L124 PetriNetUnfolderBase]: 3992/6038 cut-off events. [2024-06-21 19:02:09,375 INFO L125 PetriNetUnfolderBase]: For 663687/663707 co-relation queries the response was YES. [2024-06-21 19:02:09,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58341 conditions, 6038 events. 3992/6038 cut-off events. For 663687/663707 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 32287 event pairs, 1092 based on Foata normal form. 20/6057 useless extension candidates. Maximal degree in co-relation 58193. Up to 5453 conditions per place. [2024-06-21 19:02:09,445 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 391 selfloop transitions, 142 changer transitions 0/536 dead transitions. [2024-06-21 19:02:09,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 536 transitions, 11427 flow [2024-06-21 19:02:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:02:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:02:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 19:02:09,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 19:02:09,446 INFO L175 Difference]: Start difference. First operand has 297 places, 510 transitions, 9812 flow. Second operand 9 states and 160 transitions. [2024-06-21 19:02:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 536 transitions, 11427 flow [2024-06-21 19:02:10,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 536 transitions, 11169 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 19:02:10,533 INFO L231 Difference]: Finished difference. Result has 301 places, 514 transitions, 9923 flow [2024-06-21 19:02:10,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9560, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9923, PETRI_PLACES=301, PETRI_TRANSITIONS=514} [2024-06-21 19:02:10,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-21 19:02:10,534 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 514 transitions, 9923 flow [2024-06-21 19:02:10,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:10,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:10,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:10,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:02:10,534 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:10,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:10,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1412050980, now seen corresponding path program 5 times [2024-06-21 19:02:10,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:10,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118176176] [2024-06-21 19:02:10,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:10,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:12,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:12,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118176176] [2024-06-21 19:02:12,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118176176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:12,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:12,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:12,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824142569] [2024-06-21 19:02:12,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:12,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:12,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:12,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:12,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:12,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:02:12,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 514 transitions, 9923 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:12,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:12,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:02:12,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:14,466 INFO L124 PetriNetUnfolderBase]: 3907/5958 cut-off events. [2024-06-21 19:02:14,466 INFO L125 PetriNetUnfolderBase]: For 667496/667516 co-relation queries the response was YES. [2024-06-21 19:02:14,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58026 conditions, 5958 events. 3907/5958 cut-off events. For 667496/667516 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32282 event pairs, 1037 based on Foata normal form. 20/5977 useless extension candidates. Maximal degree in co-relation 57877. Up to 5382 conditions per place. [2024-06-21 19:02:14,556 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 127 changer transitions 0/535 dead transitions. [2024-06-21 19:02:14,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 535 transitions, 11342 flow [2024-06-21 19:02:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:02:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:02:14,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 19:02:14,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 19:02:14,557 INFO L175 Difference]: Start difference. First operand has 301 places, 514 transitions, 9923 flow. Second operand 8 states and 152 transitions. [2024-06-21 19:02:14,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 535 transitions, 11342 flow [2024-06-21 19:02:15,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 535 transitions, 11034 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 19:02:15,938 INFO L231 Difference]: Finished difference. Result has 303 places, 518 transitions, 9947 flow [2024-06-21 19:02:15,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9615, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9947, PETRI_PLACES=303, PETRI_TRANSITIONS=518} [2024-06-21 19:02:15,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-21 19:02:15,938 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 518 transitions, 9947 flow [2024-06-21 19:02:15,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:15,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:15,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:15,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:02:15,939 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:15,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1412062884, now seen corresponding path program 1 times [2024-06-21 19:02:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:15,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412892331] [2024-06-21 19:02:15,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:15,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:18,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412892331] [2024-06-21 19:02:18,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412892331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:18,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:18,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:18,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190247326] [2024-06-21 19:02:18,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:18,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:18,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:18,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:18,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:02:18,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 518 transitions, 9947 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:18,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:18,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:02:18,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:20,188 INFO L124 PetriNetUnfolderBase]: 4009/6060 cut-off events. [2024-06-21 19:02:20,188 INFO L125 PetriNetUnfolderBase]: For 677709/677711 co-relation queries the response was YES. [2024-06-21 19:02:20,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58705 conditions, 6060 events. 4009/6060 cut-off events. For 677709/677711 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 32419 event pairs, 1306 based on Foata normal form. 3/6062 useless extension candidates. Maximal degree in co-relation 58555. Up to 5935 conditions per place. [2024-06-21 19:02:20,261 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 493 selfloop transitions, 51 changer transitions 0/547 dead transitions. [2024-06-21 19:02:20,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 547 transitions, 11373 flow [2024-06-21 19:02:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:02:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:02:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 19:02:20,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 19:02:20,262 INFO L175 Difference]: Start difference. First operand has 303 places, 518 transitions, 9947 flow. Second operand 9 states and 149 transitions. [2024-06-21 19:02:20,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 547 transitions, 11373 flow [2024-06-21 19:02:21,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 547 transitions, 11147 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 19:02:21,690 INFO L231 Difference]: Finished difference. Result has 308 places, 527 transitions, 9981 flow [2024-06-21 19:02:21,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9721, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9981, PETRI_PLACES=308, PETRI_TRANSITIONS=527} [2024-06-21 19:02:21,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 19:02:21,691 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 527 transitions, 9981 flow [2024-06-21 19:02:21,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:21,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:21,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:21,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:02:21,692 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:21,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1412062481, now seen corresponding path program 4 times [2024-06-21 19:02:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:21,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721892371] [2024-06-21 19:02:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:21,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:23,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:23,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721892371] [2024-06-21 19:02:23,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721892371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:23,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:23,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:23,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037826351] [2024-06-21 19:02:23,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:23,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:23,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:23,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:23,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:24,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:02:24,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 527 transitions, 9981 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:24,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:24,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:02:24,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:25,901 INFO L124 PetriNetUnfolderBase]: 4005/6057 cut-off events. [2024-06-21 19:02:25,901 INFO L125 PetriNetUnfolderBase]: For 695580/695600 co-relation queries the response was YES. [2024-06-21 19:02:25,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58791 conditions, 6057 events. 4005/6057 cut-off events. For 695580/695600 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 32395 event pairs, 1091 based on Foata normal form. 20/6076 useless extension candidates. Maximal degree in co-relation 58639. Up to 5475 conditions per place. [2024-06-21 19:02:25,995 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 402 selfloop transitions, 144 changer transitions 0/549 dead transitions. [2024-06-21 19:02:25,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 549 transitions, 11563 flow [2024-06-21 19:02:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:02:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:02:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:02:25,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:02:25,997 INFO L175 Difference]: Start difference. First operand has 308 places, 527 transitions, 9981 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:02:25,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 549 transitions, 11563 flow [2024-06-21 19:02:27,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 549 transitions, 11461 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 19:02:27,761 INFO L231 Difference]: Finished difference. Result has 313 places, 527 transitions, 10176 flow [2024-06-21 19:02:27,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9879, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10176, PETRI_PLACES=313, PETRI_TRANSITIONS=527} [2024-06-21 19:02:27,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 19:02:27,762 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 527 transitions, 10176 flow [2024-06-21 19:02:27,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:27,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:27,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:27,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:02:27,762 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:27,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:27,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1816942354, now seen corresponding path program 3 times [2024-06-21 19:02:27,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:27,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385386941] [2024-06-21 19:02:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:27,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:29,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:29,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385386941] [2024-06-21 19:02:29,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385386941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:29,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:29,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:02:29,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896210606] [2024-06-21 19:02:29,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:29,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:02:29,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:29,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:02:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:02:29,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:02:29,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 527 transitions, 10176 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:29,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:29,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:02:29,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:30,932 INFO L124 PetriNetUnfolderBase]: 4033/6110 cut-off events. [2024-06-21 19:02:30,932 INFO L125 PetriNetUnfolderBase]: For 729012/729016 co-relation queries the response was YES. [2024-06-21 19:02:30,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60018 conditions, 6110 events. 4033/6110 cut-off events. For 729012/729016 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32913 event pairs, 1541 based on Foata normal form. 8/6117 useless extension candidates. Maximal degree in co-relation 59863. Up to 5781 conditions per place. [2024-06-21 19:02:31,026 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 105 changer transitions 0/557 dead transitions. [2024-06-21 19:02:31,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 557 transitions, 11964 flow [2024-06-21 19:02:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:02:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:02:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 19:02:31,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:02:31,027 INFO L175 Difference]: Start difference. First operand has 313 places, 527 transitions, 10176 flow. Second operand 7 states and 126 transitions. [2024-06-21 19:02:31,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 557 transitions, 11964 flow [2024-06-21 19:02:32,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 557 transitions, 11662 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 19:02:32,608 INFO L231 Difference]: Finished difference. Result has 314 places, 540 transitions, 10468 flow [2024-06-21 19:02:32,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9888, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10468, PETRI_PLACES=314, PETRI_TRANSITIONS=540} [2024-06-21 19:02:32,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 19:02:32,609 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 540 transitions, 10468 flow [2024-06-21 19:02:32,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:32,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:32,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:32,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:02:32,609 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:32,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:32,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1811228434, now seen corresponding path program 4 times [2024-06-21 19:02:32,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:32,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146759561] [2024-06-21 19:02:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:32,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:34,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:34,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146759561] [2024-06-21 19:02:34,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146759561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:34,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:34,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:02:34,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557020774] [2024-06-21 19:02:34,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:34,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:02:34,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:34,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:02:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:02:34,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:02:34,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 540 transitions, 10468 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 19:02:34,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:34,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:02:34,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:36,063 INFO L124 PetriNetUnfolderBase]: 3927/6001 cut-off events. [2024-06-21 19:02:36,064 INFO L125 PetriNetUnfolderBase]: For 737003/737007 co-relation queries the response was YES. [2024-06-21 19:02:36,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59552 conditions, 6001 events. 3927/6001 cut-off events. For 737003/737007 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32742 event pairs, 1476 based on Foata normal form. 6/6006 useless extension candidates. Maximal degree in co-relation 59395. Up to 5530 conditions per place. [2024-06-21 19:02:36,140 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 99 changer transitions 0/554 dead transitions. [2024-06-21 19:02:36,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 554 transitions, 11864 flow [2024-06-21 19:02:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:02:36,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:02:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 19:02:36,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 19:02:36,141 INFO L175 Difference]: Start difference. First operand has 314 places, 540 transitions, 10468 flow. Second operand 7 states and 129 transitions. [2024-06-21 19:02:36,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 554 transitions, 11864 flow [2024-06-21 19:02:37,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 554 transitions, 11720 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 19:02:37,886 INFO L231 Difference]: Finished difference. Result has 318 places, 540 transitions, 10539 flow [2024-06-21 19:02:37,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10324, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10539, PETRI_PLACES=318, PETRI_TRANSITIONS=540} [2024-06-21 19:02:37,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 19:02:37,888 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 540 transitions, 10539 flow [2024-06-21 19:02:37,888 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 19:02:37,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:37,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:37,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:02:37,888 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:37,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:37,889 INFO L85 PathProgramCache]: Analyzing trace with hash -931902133, now seen corresponding path program 5 times [2024-06-21 19:02:37,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:37,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979904] [2024-06-21 19:02:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:37,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:39,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:39,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979904] [2024-06-21 19:02:39,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:39,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:39,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:39,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737447445] [2024-06-21 19:02:39,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:39,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:39,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:40,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:02:40,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 540 transitions, 10539 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:40,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:40,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:02:40,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:41,696 INFO L124 PetriNetUnfolderBase]: 4090/6190 cut-off events. [2024-06-21 19:02:41,696 INFO L125 PetriNetUnfolderBase]: For 760217/760221 co-relation queries the response was YES. [2024-06-21 19:02:41,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60939 conditions, 6190 events. 4090/6190 cut-off events. For 760217/760221 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 33420 event pairs, 1548 based on Foata normal form. 6/6195 useless extension candidates. Maximal degree in co-relation 60781. Up to 5713 conditions per place. [2024-06-21 19:02:41,786 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 143 changer transitions 0/581 dead transitions. [2024-06-21 19:02:41,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 581 transitions, 12298 flow [2024-06-21 19:02:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:02:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:02:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 19:02:41,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 19:02:41,787 INFO L175 Difference]: Start difference. First operand has 318 places, 540 transitions, 10539 flow. Second operand 8 states and 143 transitions. [2024-06-21 19:02:41,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 581 transitions, 12298 flow [2024-06-21 19:02:43,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 581 transitions, 12188 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 19:02:43,678 INFO L231 Difference]: Finished difference. Result has 325 places, 563 transitions, 11171 flow [2024-06-21 19:02:43,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10429, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11171, PETRI_PLACES=325, PETRI_TRANSITIONS=563} [2024-06-21 19:02:43,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 19:02:43,679 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 563 transitions, 11171 flow [2024-06-21 19:02:43,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:43,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:43,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:43,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:02:43,679 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:43,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:43,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1811220498, now seen corresponding path program 2 times [2024-06-21 19:02:43,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:43,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44085271] [2024-06-21 19:02:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:43,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:45,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:45,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44085271] [2024-06-21 19:02:45,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44085271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:45,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:45,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:45,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746158725] [2024-06-21 19:02:45,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:45,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:45,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:45,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:45,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:45,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:02:45,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 563 transitions, 11171 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:45,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:45,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:02:45,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:47,062 INFO L124 PetriNetUnfolderBase]: 4100/6197 cut-off events. [2024-06-21 19:02:47,062 INFO L125 PetriNetUnfolderBase]: For 781415/781415 co-relation queries the response was YES. [2024-06-21 19:02:47,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61909 conditions, 6197 events. 4100/6197 cut-off events. For 781415/781415 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33324 event pairs, 1578 based on Foata normal form. 1/6197 useless extension candidates. Maximal degree in co-relation 61748. Up to 6079 conditions per place. [2024-06-21 19:02:47,155 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 534 selfloop transitions, 46 changer transitions 0/583 dead transitions. [2024-06-21 19:02:47,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 583 transitions, 12596 flow [2024-06-21 19:02:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:02:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:02:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 19:02:47,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 19:02:47,156 INFO L175 Difference]: Start difference. First operand has 325 places, 563 transitions, 11171 flow. Second operand 8 states and 132 transitions. [2024-06-21 19:02:47,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 583 transitions, 12596 flow [2024-06-21 19:02:49,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 583 transitions, 12380 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 19:02:49,406 INFO L231 Difference]: Finished difference. Result has 328 places, 569 transitions, 11136 flow [2024-06-21 19:02:49,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10955, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11136, PETRI_PLACES=328, PETRI_TRANSITIONS=569} [2024-06-21 19:02:49,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 19:02:49,406 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 569 transitions, 11136 flow [2024-06-21 19:02:49,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:49,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:49,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:49,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:02:49,407 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:49,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:49,407 INFO L85 PathProgramCache]: Analyzing trace with hash 711013969, now seen corresponding path program 6 times [2024-06-21 19:02:49,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:49,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301064006] [2024-06-21 19:02:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:49,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:51,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:51,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301064006] [2024-06-21 19:02:51,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301064006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:51,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:51,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:51,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501440540] [2024-06-21 19:02:51,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:51,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:51,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:02:51,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 569 transitions, 11136 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:51,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:51,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:02:51,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:52,878 INFO L124 PetriNetUnfolderBase]: 4144/6264 cut-off events. [2024-06-21 19:02:52,878 INFO L125 PetriNetUnfolderBase]: For 810023/810027 co-relation queries the response was YES. [2024-06-21 19:02:52,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62719 conditions, 6264 events. 4144/6264 cut-off events. For 810023/810027 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 33832 event pairs, 1547 based on Foata normal form. 6/6269 useless extension candidates. Maximal degree in co-relation 62557. Up to 5770 conditions per place. [2024-06-21 19:02:52,970 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 458 selfloop transitions, 136 changer transitions 0/597 dead transitions. [2024-06-21 19:02:52,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 597 transitions, 13063 flow [2024-06-21 19:02:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:02:52,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:02:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 19:02:52,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 19:02:52,971 INFO L175 Difference]: Start difference. First operand has 328 places, 569 transitions, 11136 flow. Second operand 9 states and 148 transitions. [2024-06-21 19:02:52,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 597 transitions, 13063 flow [2024-06-21 19:02:55,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 597 transitions, 12972 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 19:02:55,310 INFO L231 Difference]: Finished difference. Result has 335 places, 580 transitions, 11592 flow [2024-06-21 19:02:55,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11045, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11592, PETRI_PLACES=335, PETRI_TRANSITIONS=580} [2024-06-21 19:02:55,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 19:02:55,310 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 580 transitions, 11592 flow [2024-06-21 19:02:55,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:55,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:02:55,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:02:55,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:02:55,311 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:02:55,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:02:55,311 INFO L85 PathProgramCache]: Analyzing trace with hash 711002809, now seen corresponding path program 7 times [2024-06-21 19:02:55,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:02:55,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653642285] [2024-06-21 19:02:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:02:55,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:02:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:02:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:02:57,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:02:57,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653642285] [2024-06-21 19:02:57,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653642285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:02:57,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:02:57,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:02:57,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875081106] [2024-06-21 19:02:57,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:02:57,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:02:57,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:02:57,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:02:57,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:02:57,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:02:57,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 580 transitions, 11592 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:02:57,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:02:57,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:02:57,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:02:58,983 INFO L124 PetriNetUnfolderBase]: 4140/6259 cut-off events. [2024-06-21 19:02:58,983 INFO L125 PetriNetUnfolderBase]: For 826712/826716 co-relation queries the response was YES. [2024-06-21 19:02:59,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63277 conditions, 6259 events. 4140/6259 cut-off events. For 826712/826716 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 33764 event pairs, 1547 based on Foata normal form. 6/6264 useless extension candidates. Maximal degree in co-relation 63112. Up to 5768 conditions per place. [2024-06-21 19:02:59,066 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 456 selfloop transitions, 137 changer transitions 0/596 dead transitions. [2024-06-21 19:02:59,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 596 transitions, 13159 flow [2024-06-21 19:02:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:02:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:02:59,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 19:02:59,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 19:02:59,067 INFO L175 Difference]: Start difference. First operand has 335 places, 580 transitions, 11592 flow. Second operand 9 states and 148 transitions. [2024-06-21 19:02:59,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 596 transitions, 13159 flow [2024-06-21 19:03:01,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 596 transitions, 12921 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 19:03:01,260 INFO L231 Difference]: Finished difference. Result has 339 places, 581 transitions, 11675 flow [2024-06-21 19:03:01,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11354, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11675, PETRI_PLACES=339, PETRI_TRANSITIONS=581} [2024-06-21 19:03:01,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-21 19:03:01,261 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 581 transitions, 11675 flow [2024-06-21 19:03:01,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:01,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:01,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:01,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:03:01,261 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:01,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:01,262 INFO L85 PathProgramCache]: Analyzing trace with hash -780181940, now seen corresponding path program 5 times [2024-06-21 19:03:01,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:01,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970295312] [2024-06-21 19:03:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:01,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:02,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:02,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970295312] [2024-06-21 19:03:02,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970295312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:02,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:02,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:02,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689759701] [2024-06-21 19:03:02,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:02,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:02,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:02,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:03:02,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 581 transitions, 11675 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:02,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:02,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:03:02,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:04,440 INFO L124 PetriNetUnfolderBase]: 4124/6230 cut-off events. [2024-06-21 19:03:04,440 INFO L125 PetriNetUnfolderBase]: For 841174/841174 co-relation queries the response was YES. [2024-06-21 19:03:04,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63113 conditions, 6230 events. 4124/6230 cut-off events. For 841174/841174 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33533 event pairs, 1579 based on Foata normal form. 2/6231 useless extension candidates. Maximal degree in co-relation 62947. Up to 6114 conditions per place. [2024-06-21 19:03:04,540 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 554 selfloop transitions, 39 changer transitions 0/596 dead transitions. [2024-06-21 19:03:04,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 596 transitions, 13084 flow [2024-06-21 19:03:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 19:03:04,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:03:04,541 INFO L175 Difference]: Start difference. First operand has 339 places, 581 transitions, 11675 flow. Second operand 7 states and 119 transitions. [2024-06-21 19:03:04,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 596 transitions, 13084 flow [2024-06-21 19:03:06,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 596 transitions, 12815 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 19:03:06,784 INFO L231 Difference]: Finished difference. Result has 340 places, 581 transitions, 11495 flow [2024-06-21 19:03:06,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11406, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11495, PETRI_PLACES=340, PETRI_TRANSITIONS=581} [2024-06-21 19:03:06,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-21 19:03:06,785 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 581 transitions, 11495 flow [2024-06-21 19:03:06,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:06,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:06,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:06,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:03:06,785 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:06,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:06,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1596482600, now seen corresponding path program 6 times [2024-06-21 19:03:06,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:06,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183802627] [2024-06-21 19:03:06,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:06,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:08,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:08,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183802627] [2024-06-21 19:03:08,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183802627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:08,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:08,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:08,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347857656] [2024-06-21 19:03:08,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:08,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:08,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:08,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:08,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:08,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:03:08,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 581 transitions, 11495 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:08,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:08,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:03:08,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:09,943 INFO L124 PetriNetUnfolderBase]: 4129/6236 cut-off events. [2024-06-21 19:03:09,944 INFO L125 PetriNetUnfolderBase]: For 855670/855670 co-relation queries the response was YES. [2024-06-21 19:03:10,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63096 conditions, 6236 events. 4129/6236 cut-off events. For 855670/855670 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33574 event pairs, 1584 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 62929. Up to 6148 conditions per place. [2024-06-21 19:03:10,041 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 565 selfloop transitions, 27 changer transitions 0/595 dead transitions. [2024-06-21 19:03:10,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 595 transitions, 12804 flow [2024-06-21 19:03:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 19:03:10,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-21 19:03:10,042 INFO L175 Difference]: Start difference. First operand has 340 places, 581 transitions, 11495 flow. Second operand 7 states and 114 transitions. [2024-06-21 19:03:10,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 595 transitions, 12804 flow [2024-06-21 19:03:12,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 595 transitions, 12437 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 19:03:12,453 INFO L231 Difference]: Finished difference. Result has 338 places, 584 transitions, 11282 flow [2024-06-21 19:03:12,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11142, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11282, PETRI_PLACES=338, PETRI_TRANSITIONS=584} [2024-06-21 19:03:12,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-21 19:03:12,453 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 584 transitions, 11282 flow [2024-06-21 19:03:12,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:12,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:12,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:12,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:03:12,454 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:12,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2064611312, now seen corresponding path program 7 times [2024-06-21 19:03:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:12,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018113705] [2024-06-21 19:03:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:12,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:13,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:13,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018113705] [2024-06-21 19:03:13,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018113705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:13,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:13,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:13,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991562309] [2024-06-21 19:03:13,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:13,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:13,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:14,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:03:14,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 584 transitions, 11282 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:14,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:14,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:03:14,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:15,622 INFO L124 PetriNetUnfolderBase]: 4123/6228 cut-off events. [2024-06-21 19:03:15,622 INFO L125 PetriNetUnfolderBase]: For 869199/869203 co-relation queries the response was YES. [2024-06-21 19:03:15,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62803 conditions, 6228 events. 4123/6228 cut-off events. For 869199/869203 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33500 event pairs, 1577 based on Foata normal form. 6/6233 useless extension candidates. Maximal degree in co-relation 62636. Up to 6116 conditions per place. [2024-06-21 19:03:15,715 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 37 changer transitions 0/594 dead transitions. [2024-06-21 19:03:15,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 594 transitions, 12654 flow [2024-06-21 19:03:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 19:03:15,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 19:03:15,716 INFO L175 Difference]: Start difference. First operand has 338 places, 584 transitions, 11282 flow. Second operand 7 states and 115 transitions. [2024-06-21 19:03:15,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 594 transitions, 12654 flow [2024-06-21 19:03:17,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 594 transitions, 12573 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 19:03:17,762 INFO L231 Difference]: Finished difference. Result has 340 places, 584 transitions, 11283 flow [2024-06-21 19:03:17,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11201, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11283, PETRI_PLACES=340, PETRI_TRANSITIONS=584} [2024-06-21 19:03:17,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-21 19:03:17,763 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 584 transitions, 11283 flow [2024-06-21 19:03:17,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:17,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:17,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:17,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:03:17,763 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:17,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash -465514160, now seen corresponding path program 8 times [2024-06-21 19:03:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:17,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617316772] [2024-06-21 19:03:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:19,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617316772] [2024-06-21 19:03:19,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617316772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:19,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:19,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:03:19,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961105386] [2024-06-21 19:03:19,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:19,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:03:19,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:03:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:03:19,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:03:19,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 584 transitions, 11283 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:19,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:19,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:03:19,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:20,867 INFO L124 PetriNetUnfolderBase]: 4118/6221 cut-off events. [2024-06-21 19:03:20,868 INFO L125 PetriNetUnfolderBase]: For 882679/882683 co-relation queries the response was YES. [2024-06-21 19:03:20,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62910 conditions, 6221 events. 4118/6221 cut-off events. For 882679/882683 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33477 event pairs, 1577 based on Foata normal form. 5/6225 useless extension candidates. Maximal degree in co-relation 62742. Up to 6135 conditions per place. [2024-06-21 19:03:20,960 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 563 selfloop transitions, 27 changer transitions 0/593 dead transitions. [2024-06-21 19:03:20,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 593 transitions, 12495 flow [2024-06-21 19:03:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:03:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:03:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 19:03:20,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 19:03:20,961 INFO L175 Difference]: Start difference. First operand has 340 places, 584 transitions, 11283 flow. Second operand 7 states and 111 transitions. [2024-06-21 19:03:20,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 593 transitions, 12495 flow [2024-06-21 19:03:23,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 593 transitions, 12390 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 19:03:23,477 INFO L231 Difference]: Finished difference. Result has 342 places, 584 transitions, 11238 flow [2024-06-21 19:03:23,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11178, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11238, PETRI_PLACES=342, PETRI_TRANSITIONS=584} [2024-06-21 19:03:23,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 19:03:23,478 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 584 transitions, 11238 flow [2024-06-21 19:03:23,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:23,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:23,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:23,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:03:23,478 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 19:03:23,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1218401662, now seen corresponding path program 5 times [2024-06-21 19:03:23,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:23,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637664332] [2024-06-21 19:03:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:23,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:25,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:25,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637664332] [2024-06-21 19:03:25,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637664332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:25,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:25,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:03:25,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397561222] [2024-06-21 19:03:25,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:25,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:03:25,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:25,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:03:25,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:03:25,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:25,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 584 transitions, 11238 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:25,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:25,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:25,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:27,836 INFO L124 PetriNetUnfolderBase]: 4111/6283 cut-off events. [2024-06-21 19:03:27,836 INFO L125 PetriNetUnfolderBase]: For 930704/930704 co-relation queries the response was YES. [2024-06-21 19:03:27,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63425 conditions, 6283 events. 4111/6283 cut-off events. For 930704/930704 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34714 event pairs, 1476 based on Foata normal form. 12/6294 useless extension candidates. Maximal degree in co-relation 63256. Up to 5588 conditions per place. [2024-06-21 19:03:27,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 517 selfloop transitions, 83 changer transitions 0/630 dead transitions. [2024-06-21 19:03:27,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 630 transitions, 12872 flow [2024-06-21 19:03:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:03:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:03:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 19:03:27,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 19:03:27,928 INFO L175 Difference]: Start difference. First operand has 342 places, 584 transitions, 11238 flow. Second operand 9 states and 160 transitions. [2024-06-21 19:03:27,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 630 transitions, 12872 flow [2024-06-21 19:03:30,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 630 transitions, 12784 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:03:30,286 INFO L231 Difference]: Finished difference. Result has 347 places, 593 transitions, 11516 flow [2024-06-21 19:03:30,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11150, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11516, PETRI_PLACES=347, PETRI_TRANSITIONS=593} [2024-06-21 19:03:30,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 19:03:30,287 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 593 transitions, 11516 flow [2024-06-21 19:03:30,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:30,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:30,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:30,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:03:30,288 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 19:03:30,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:30,288 INFO L85 PathProgramCache]: Analyzing trace with hash -327130798, now seen corresponding path program 6 times [2024-06-21 19:03:30,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:30,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496017987] [2024-06-21 19:03:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:30,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:32,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:32,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496017987] [2024-06-21 19:03:32,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496017987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:32,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:32,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:03:32,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495082515] [2024-06-21 19:03:32,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:32,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:03:32,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:32,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:03:32,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:03:32,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:32,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 593 transitions, 11516 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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 19:03:32,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:32,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:32,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:34,648 INFO L124 PetriNetUnfolderBase]: 4152/6354 cut-off events. [2024-06-21 19:03:34,648 INFO L125 PetriNetUnfolderBase]: For 957098/957098 co-relation queries the response was YES. [2024-06-21 19:03:34,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64892 conditions, 6354 events. 4152/6354 cut-off events. For 957098/957098 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35246 event pairs, 1489 based on Foata normal form. 12/6365 useless extension candidates. Maximal degree in co-relation 64719. Up to 5700 conditions per place. [2024-06-21 19:03:34,743 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 501 selfloop transitions, 103 changer transitions 0/634 dead transitions. [2024-06-21 19:03:34,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 634 transitions, 13141 flow [2024-06-21 19:03:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 19:03:34,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 19:03:34,745 INFO L175 Difference]: Start difference. First operand has 347 places, 593 transitions, 11516 flow. Second operand 8 states and 154 transitions. [2024-06-21 19:03:34,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 634 transitions, 13141 flow [2024-06-21 19:03:37,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 634 transitions, 12994 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 19:03:37,055 INFO L231 Difference]: Finished difference. Result has 352 places, 605 transitions, 11931 flow [2024-06-21 19:03:37,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11371, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11931, PETRI_PLACES=352, PETRI_TRANSITIONS=605} [2024-06-21 19:03:37,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-21 19:03:37,056 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 605 transitions, 11931 flow [2024-06-21 19:03:37,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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 19:03:37,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:37,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:37,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:03:37,056 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 19:03:37,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash -41800288, now seen corresponding path program 7 times [2024-06-21 19:03:37,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:37,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771453298] [2024-06-21 19:03:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:37,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:39,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:39,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771453298] [2024-06-21 19:03:39,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771453298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:39,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:39,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:03:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457823512] [2024-06-21 19:03:39,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:39,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:03:39,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:03:39,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:03:39,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:39,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 605 transitions, 11931 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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 19:03:39,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:39,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:39,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:41,329 INFO L124 PetriNetUnfolderBase]: 4193/6414 cut-off events. [2024-06-21 19:03:41,329 INFO L125 PetriNetUnfolderBase]: For 981819/981823 co-relation queries the response was YES. [2024-06-21 19:03:41,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65725 conditions, 6414 events. 4193/6414 cut-off events. For 981819/981823 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35582 event pairs, 1509 based on Foata normal form. 16/6429 useless extension candidates. Maximal degree in co-relation 65550. Up to 6004 conditions per place. [2024-06-21 19:03:41,421 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 584 selfloop transitions, 24 changer transitions 0/638 dead transitions. [2024-06-21 19:03:41,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 638 transitions, 13343 flow [2024-06-21 19:03:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:03:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:03:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 19:03:41,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 19:03:41,422 INFO L175 Difference]: Start difference. First operand has 352 places, 605 transitions, 11931 flow. Second operand 10 states and 169 transitions. [2024-06-21 19:03:41,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 638 transitions, 13343 flow [2024-06-21 19:03:43,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 638 transitions, 13140 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 19:03:43,937 INFO L231 Difference]: Finished difference. Result has 358 places, 606 transitions, 11836 flow [2024-06-21 19:03:43,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11728, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11836, PETRI_PLACES=358, PETRI_TRANSITIONS=606} [2024-06-21 19:03:43,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-21 19:03:43,938 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 606 transitions, 11836 flow [2024-06-21 19:03:43,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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 19:03:43,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:43,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:43,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:03:43,938 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 19:03:43,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:43,938 INFO L85 PathProgramCache]: Analyzing trace with hash 311287984, now seen corresponding path program 8 times [2024-06-21 19:03:43,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:43,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692515061] [2024-06-21 19:03:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:43,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692515061] [2024-06-21 19:03:46,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692515061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:46,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:46,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:03:46,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939073516] [2024-06-21 19:03:46,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:46,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:03:46,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:46,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:03:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:03:46,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:46,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 606 transitions, 11836 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:46,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:46,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:46,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:48,414 INFO L124 PetriNetUnfolderBase]: 4316/6636 cut-off events. [2024-06-21 19:03:48,414 INFO L125 PetriNetUnfolderBase]: For 1003076/1003076 co-relation queries the response was YES. [2024-06-21 19:03:48,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66521 conditions, 6636 events. 4316/6636 cut-off events. For 1003076/1003076 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 37447 event pairs, 1488 based on Foata normal form. 12/6647 useless extension candidates. Maximal degree in co-relation 66345. Up to 5471 conditions per place. [2024-06-21 19:03:48,516 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 180 changer transitions 0/639 dead transitions. [2024-06-21 19:03:48,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 639 transitions, 13274 flow [2024-06-21 19:03:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:03:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:03:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 19:03:48,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 19:03:48,518 INFO L175 Difference]: Start difference. First operand has 358 places, 606 transitions, 11836 flow. Second operand 8 states and 154 transitions. [2024-06-21 19:03:48,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 639 transitions, 13274 flow [2024-06-21 19:03:50,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 639 transitions, 13180 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 19:03:50,902 INFO L231 Difference]: Finished difference. Result has 358 places, 609 transitions, 12189 flow [2024-06-21 19:03:50,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11742, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12189, PETRI_PLACES=358, PETRI_TRANSITIONS=609} [2024-06-21 19:03:50,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-21 19:03:50,903 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 609 transitions, 12189 flow [2024-06-21 19:03:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:50,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:50,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:50,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:03:50,904 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 19:03:50,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:50,904 INFO L85 PathProgramCache]: Analyzing trace with hash 311518624, now seen corresponding path program 9 times [2024-06-21 19:03:50,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:50,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090715710] [2024-06-21 19:03:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:50,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:53,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:53,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090715710] [2024-06-21 19:03:53,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090715710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:53,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:53,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:03:53,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500643682] [2024-06-21 19:03:53,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:53,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:03:53,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:53,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:03:53,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:03:53,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:03:53,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 609 transitions, 12189 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:53,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:53,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:03:53,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:03:55,443 INFO L124 PetriNetUnfolderBase]: 4337/6667 cut-off events. [2024-06-21 19:03:55,444 INFO L125 PetriNetUnfolderBase]: For 1000394/1000394 co-relation queries the response was YES. [2024-06-21 19:03:55,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66413 conditions, 6667 events. 4337/6667 cut-off events. For 1000394/1000394 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 37698 event pairs, 1478 based on Foata normal form. 12/6678 useless extension candidates. Maximal degree in co-relation 66236. Up to 5319 conditions per place. [2024-06-21 19:03:55,537 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 174 changer transitions 0/637 dead transitions. [2024-06-21 19:03:55,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 637 transitions, 13453 flow [2024-06-21 19:03:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:03:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:03:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:03:55,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:03:55,539 INFO L175 Difference]: Start difference. First operand has 358 places, 609 transitions, 12189 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:03:55,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 637 transitions, 13453 flow [2024-06-21 19:03:57,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 637 transitions, 13056 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 19:03:57,866 INFO L231 Difference]: Finished difference. Result has 360 places, 609 transitions, 12075 flow [2024-06-21 19:03:57,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11710, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12075, PETRI_PLACES=360, PETRI_TRANSITIONS=609} [2024-06-21 19:03:57,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-21 19:03:57,866 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 609 transitions, 12075 flow [2024-06-21 19:03:57,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:57,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:03:57,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:03:57,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:03:57,867 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:03:57,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:03:57,867 INFO L85 PathProgramCache]: Analyzing trace with hash 581386960, now seen corresponding path program 3 times [2024-06-21 19:03:57,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:03:57,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928821686] [2024-06-21 19:03:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:03:57,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:03:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:03:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:03:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:03:59,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928821686] [2024-06-21 19:03:59,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928821686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:03:59,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:03:59,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:03:59,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151881570] [2024-06-21 19:03:59,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:03:59,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:03:59,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:03:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:03:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:03:59,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:03:59,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 609 transitions, 12075 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:03:59,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:03:59,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:03:59,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:01,395 INFO L124 PetriNetUnfolderBase]: 4451/6785 cut-off events. [2024-06-21 19:04:01,396 INFO L125 PetriNetUnfolderBase]: For 977922/977922 co-relation queries the response was YES. [2024-06-21 19:04:01,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66997 conditions, 6785 events. 4451/6785 cut-off events. For 977922/977922 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 37872 event pairs, 1672 based on Foata normal form. 3/6787 useless extension candidates. Maximal degree in co-relation 66819. Up to 6710 conditions per place. [2024-06-21 19:04:01,499 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 602 selfloop transitions, 21 changer transitions 0/626 dead transitions. [2024-06-21 19:04:01,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 626 transitions, 13476 flow [2024-06-21 19:04:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-21 19:04:01,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-21 19:04:01,500 INFO L175 Difference]: Start difference. First operand has 360 places, 609 transitions, 12075 flow. Second operand 9 states and 130 transitions. [2024-06-21 19:04:01,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 626 transitions, 13476 flow [2024-06-21 19:04:03,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 626 transitions, 12984 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 19:04:03,735 INFO L231 Difference]: Finished difference. Result has 361 places, 614 transitions, 11757 flow [2024-06-21 19:04:03,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11583, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11757, PETRI_PLACES=361, PETRI_TRANSITIONS=614} [2024-06-21 19:04:03,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-21 19:04:03,736 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 614 transitions, 11757 flow [2024-06-21 19:04:03,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:03,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:03,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:03,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:04:03,736 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:03,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash -693252195, now seen corresponding path program 8 times [2024-06-21 19:04:03,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:03,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200994816] [2024-06-21 19:04:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:03,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:05,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:05,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200994816] [2024-06-21 19:04:05,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200994816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:05,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:05,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:05,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939250904] [2024-06-21 19:04:05,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:05,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:05,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:05,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:05,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:05,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:04:05,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 614 transitions, 11757 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:05,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:05,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:04:05,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:07,272 INFO L124 PetriNetUnfolderBase]: 4479/6825 cut-off events. [2024-06-21 19:04:07,272 INFO L125 PetriNetUnfolderBase]: For 972269/972273 co-relation queries the response was YES. [2024-06-21 19:04:07,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66522 conditions, 6825 events. 4479/6825 cut-off events. For 972269/972273 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38085 event pairs, 1664 based on Foata normal form. 6/6830 useless extension candidates. Maximal degree in co-relation 66344. Up to 6706 conditions per place. [2024-06-21 19:04:07,376 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 586 selfloop transitions, 44 changer transitions 0/633 dead transitions. [2024-06-21 19:04:07,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 633 transitions, 13398 flow [2024-06-21 19:04:07,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:07,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 19:04:07,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 19:04:07,378 INFO L175 Difference]: Start difference. First operand has 361 places, 614 transitions, 11757 flow. Second operand 8 states and 127 transitions. [2024-06-21 19:04:07,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 633 transitions, 13398 flow [2024-06-21 19:04:09,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 633 transitions, 13233 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 19:04:09,911 INFO L231 Difference]: Finished difference. Result has 362 places, 622 transitions, 11892 flow [2024-06-21 19:04:09,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11592, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11892, PETRI_PLACES=362, PETRI_TRANSITIONS=622} [2024-06-21 19:04:09,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-21 19:04:09,911 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 622 transitions, 11892 flow [2024-06-21 19:04:09,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:09,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:09,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:09,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:04:09,912 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:09,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:09,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1203350665, now seen corresponding path program 9 times [2024-06-21 19:04:09,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:09,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886883156] [2024-06-21 19:04:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:09,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:11,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:11,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886883156] [2024-06-21 19:04:11,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886883156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:11,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:11,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:11,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339798038] [2024-06-21 19:04:11,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:11,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:11,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:11,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:11,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:11,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:04:11,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 622 transitions, 11892 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:11,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:11,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:04:11,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:13,347 INFO L124 PetriNetUnfolderBase]: 4491/6842 cut-off events. [2024-06-21 19:04:13,347 INFO L125 PetriNetUnfolderBase]: For 993174/993178 co-relation queries the response was YES. [2024-06-21 19:04:13,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66927 conditions, 6842 events. 4491/6842 cut-off events. For 993174/993178 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38246 event pairs, 1663 based on Foata normal form. 6/6847 useless extension candidates. Maximal degree in co-relation 66749. Up to 6659 conditions per place. [2024-06-21 19:04:13,451 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 61 changer transitions 0/638 dead transitions. [2024-06-21 19:04:13,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 638 transitions, 13635 flow [2024-06-21 19:04:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 19:04:13,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36772486772486773 [2024-06-21 19:04:13,452 INFO L175 Difference]: Start difference. First operand has 362 places, 622 transitions, 11892 flow. Second operand 9 states and 139 transitions. [2024-06-21 19:04:13,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 638 transitions, 13635 flow [2024-06-21 19:04:15,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 638 transitions, 13486 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 19:04:15,804 INFO L231 Difference]: Finished difference. Result has 366 places, 626 transitions, 11970 flow [2024-06-21 19:04:15,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11743, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11970, PETRI_PLACES=366, PETRI_TRANSITIONS=626} [2024-06-21 19:04:15,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-21 19:04:15,805 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 626 transitions, 11970 flow [2024-06-21 19:04:15,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:15,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:15,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:15,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:04:15,805 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:15,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:15,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1203350262, now seen corresponding path program 4 times [2024-06-21 19:04:15,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:15,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007162885] [2024-06-21 19:04:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:15,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:17,430 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 19:04:17,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:17,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007162885] [2024-06-21 19:04:17,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007162885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:17,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:17,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:17,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074278040] [2024-06-21 19:04:17,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:17,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:17,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:17,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:17,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:17,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:04:17,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 626 transitions, 11970 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:17,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:17,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:04:17,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:19,413 INFO L124 PetriNetUnfolderBase]: 4522/6884 cut-off events. [2024-06-21 19:04:19,413 INFO L125 PetriNetUnfolderBase]: For 1028620/1028620 co-relation queries the response was YES. [2024-06-21 19:04:19,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67732 conditions, 6884 events. 4522/6884 cut-off events. For 1028620/1028620 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38474 event pairs, 1674 based on Foata normal form. 3/6886 useless extension candidates. Maximal degree in co-relation 67553. Up to 6777 conditions per place. [2024-06-21 19:04:19,514 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 608 selfloop transitions, 37 changer transitions 0/648 dead transitions. [2024-06-21 19:04:19,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 648 transitions, 13665 flow [2024-06-21 19:04:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 19:04:19,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-21 19:04:19,516 INFO L175 Difference]: Start difference. First operand has 366 places, 626 transitions, 11970 flow. Second operand 9 states and 137 transitions. [2024-06-21 19:04:19,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 648 transitions, 13665 flow [2024-06-21 19:04:22,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 648 transitions, 13258 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-21 19:04:22,205 INFO L231 Difference]: Finished difference. Result has 365 places, 634 transitions, 11839 flow [2024-06-21 19:04:22,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11563, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11839, PETRI_PLACES=365, PETRI_TRANSITIONS=634} [2024-06-21 19:04:22,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-21 19:04:22,206 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 634 transitions, 11839 flow [2024-06-21 19:04:22,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:22,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:22,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:22,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:04:22,207 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:22,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1190463252, now seen corresponding path program 5 times [2024-06-21 19:04:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:22,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456613100] [2024-06-21 19:04:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:22,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:23,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456613100] [2024-06-21 19:04:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456613100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:23,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:23,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:23,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990689085] [2024-06-21 19:04:23,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:23,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:23,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:23,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:04:23,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 634 transitions, 11839 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:23,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:23,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:04:23,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:25,732 INFO L124 PetriNetUnfolderBase]: 4513/6872 cut-off events. [2024-06-21 19:04:25,732 INFO L125 PetriNetUnfolderBase]: For 1036800/1036800 co-relation queries the response was YES. [2024-06-21 19:04:25,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67300 conditions, 6872 events. 4513/6872 cut-off events. For 1036800/1036800 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38361 event pairs, 1672 based on Foata normal form. 3/6874 useless extension candidates. Maximal degree in co-relation 67123. Up to 6785 conditions per place. [2024-06-21 19:04:25,839 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 617 selfloop transitions, 28 changer transitions 0/648 dead transitions. [2024-06-21 19:04:25,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 648 transitions, 13177 flow [2024-06-21 19:04:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:25,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-21 19:04:25,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-21 19:04:25,840 INFO L175 Difference]: Start difference. First operand has 365 places, 634 transitions, 11839 flow. Second operand 9 states and 134 transitions. [2024-06-21 19:04:25,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 648 transitions, 13177 flow [2024-06-21 19:04:28,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 648 transitions, 12990 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-21 19:04:28,217 INFO L231 Difference]: Finished difference. Result has 369 places, 634 transitions, 11716 flow [2024-06-21 19:04:28,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11652, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11716, PETRI_PLACES=369, PETRI_TRANSITIONS=634} [2024-06-21 19:04:28,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 19:04:28,218 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 634 transitions, 11716 flow [2024-06-21 19:04:28,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:28,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:28,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:28,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:04:28,218 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:28,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash 580987587, now seen corresponding path program 10 times [2024-06-21 19:04:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:28,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177059076] [2024-06-21 19:04:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:29,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:29,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177059076] [2024-06-21 19:04:29,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177059076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:29,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:29,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:29,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403193876] [2024-06-21 19:04:29,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:29,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:29,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:29,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:04:29,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 634 transitions, 11716 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:29,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:29,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:04:29,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:31,777 INFO L124 PetriNetUnfolderBase]: 4507/6865 cut-off events. [2024-06-21 19:04:31,777 INFO L125 PetriNetUnfolderBase]: For 1044773/1044777 co-relation queries the response was YES. [2024-06-21 19:04:31,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67136 conditions, 6865 events. 4507/6865 cut-off events. For 1044773/1044777 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38349 event pairs, 1663 based on Foata normal form. 6/6870 useless extension candidates. Maximal degree in co-relation 66957. Up to 6685 conditions per place. [2024-06-21 19:04:31,881 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 576 selfloop transitions, 66 changer transitions 0/645 dead transitions. [2024-06-21 19:04:31,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 645 transitions, 13212 flow [2024-06-21 19:04:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 19:04:31,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 19:04:31,882 INFO L175 Difference]: Start difference. First operand has 369 places, 634 transitions, 11716 flow. Second operand 9 states and 138 transitions. [2024-06-21 19:04:31,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 645 transitions, 13212 flow [2024-06-21 19:04:34,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 645 transitions, 13074 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 19:04:34,698 INFO L231 Difference]: Finished difference. Result has 370 places, 634 transitions, 11717 flow [2024-06-21 19:04:34,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11578, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11717, PETRI_PLACES=370, PETRI_TRANSITIONS=634} [2024-06-21 19:04:34,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 19:04:34,699 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 634 transitions, 11717 flow [2024-06-21 19:04:34,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:34,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:34,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:34,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:04:34,700 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:34,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:34,700 INFO L85 PathProgramCache]: Analyzing trace with hash 580987246, now seen corresponding path program 6 times [2024-06-21 19:04:34,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:34,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887981229] [2024-06-21 19:04:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:34,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:36,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:36,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887981229] [2024-06-21 19:04:36,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887981229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:36,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:36,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:36,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11503886] [2024-06-21 19:04:36,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:36,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:36,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:36,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:04:36,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 634 transitions, 11717 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:36,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:36,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:04:36,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:38,601 INFO L124 PetriNetUnfolderBase]: 4400/6756 cut-off events. [2024-06-21 19:04:38,601 INFO L125 PetriNetUnfolderBase]: For 1062734/1062738 co-relation queries the response was YES. [2024-06-21 19:04:38,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66637 conditions, 6756 events. 4400/6756 cut-off events. For 1062734/1062738 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 38242 event pairs, 1598 based on Foata normal form. 6/6761 useless extension candidates. Maximal degree in co-relation 66457. Up to 6441 conditions per place. [2024-06-21 19:04:38,692 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 569 selfloop transitions, 43 changer transitions 0/645 dead transitions. [2024-06-21 19:04:38,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 645 transitions, 12986 flow [2024-06-21 19:04:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 19:04:38,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 19:04:38,693 INFO L175 Difference]: Start difference. First operand has 370 places, 634 transitions, 11717 flow. Second operand 8 states and 133 transitions. [2024-06-21 19:04:38,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 645 transitions, 12986 flow [2024-06-21 19:04:41,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 645 transitions, 12767 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 19:04:41,274 INFO L231 Difference]: Finished difference. Result has 371 places, 635 transitions, 11604 flow [2024-06-21 19:04:41,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11498, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11604, PETRI_PLACES=371, PETRI_TRANSITIONS=635} [2024-06-21 19:04:41,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 19:04:41,275 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 635 transitions, 11604 flow [2024-06-21 19:04:41,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:41,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:41,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:04:41,276 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:41,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1233948565, now seen corresponding path program 1 times [2024-06-21 19:04:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:41,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845488774] [2024-06-21 19:04:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:43,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:43,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845488774] [2024-06-21 19:04:43,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845488774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:43,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:43,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:43,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643432449] [2024-06-21 19:04:43,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:43,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:43,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:43,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:43,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:04:43,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 635 transitions, 11604 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:43,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:43,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:04:43,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:45,749 INFO L124 PetriNetUnfolderBase]: 4516/6878 cut-off events. [2024-06-21 19:04:45,749 INFO L125 PetriNetUnfolderBase]: For 1080822/1080822 co-relation queries the response was YES. [2024-06-21 19:04:45,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67389 conditions, 6878 events. 4516/6878 cut-off events. For 1080822/1080822 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 38429 event pairs, 1669 based on Foata normal form. 2/6879 useless extension candidates. Maximal degree in co-relation 67208. Up to 6766 conditions per place. [2024-06-21 19:04:45,852 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 625 selfloop transitions, 30 changer transitions 0/658 dead transitions. [2024-06-21 19:04:45,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 658 transitions, 13066 flow [2024-06-21 19:04:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:04:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:04:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 19:04:45,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 19:04:45,853 INFO L175 Difference]: Start difference. First operand has 371 places, 635 transitions, 11604 flow. Second operand 9 states and 140 transitions. [2024-06-21 19:04:45,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 658 transitions, 13066 flow [2024-06-21 19:04:48,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 658 transitions, 12957 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 19:04:48,492 INFO L231 Difference]: Finished difference. Result has 374 places, 641 transitions, 11659 flow [2024-06-21 19:04:48,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11495, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11659, PETRI_PLACES=374, PETRI_TRANSITIONS=641} [2024-06-21 19:04:48,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-21 19:04:48,492 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 641 transitions, 11659 flow [2024-06-21 19:04:48,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:48,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:48,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:48,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:04:48,493 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:48,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash -609396599, now seen corresponding path program 2 times [2024-06-21 19:04:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:48,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253789954] [2024-06-21 19:04:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:48,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:50,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:50,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253789954] [2024-06-21 19:04:50,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253789954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:50,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:50,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227581395] [2024-06-21 19:04:50,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:50,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:50,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:50,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:50,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:50,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:04:50,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 641 transitions, 11659 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:50,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:50,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:04:50,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:52,853 INFO L124 PetriNetUnfolderBase]: 4542/6914 cut-off events. [2024-06-21 19:04:52,853 INFO L125 PetriNetUnfolderBase]: For 1110369/1110369 co-relation queries the response was YES. [2024-06-21 19:04:52,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68416 conditions, 6914 events. 4542/6914 cut-off events. For 1110369/1110369 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38650 event pairs, 1670 based on Foata normal form. 2/6915 useless extension candidates. Maximal degree in co-relation 68234. Up to 6733 conditions per place. [2024-06-21 19:04:52,958 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 612 selfloop transitions, 54 changer transitions 0/669 dead transitions. [2024-06-21 19:04:52,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 669 transitions, 13591 flow [2024-06-21 19:04:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:52,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 19:04:52,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 19:04:52,959 INFO L175 Difference]: Start difference. First operand has 374 places, 641 transitions, 11659 flow. Second operand 8 states and 137 transitions. [2024-06-21 19:04:52,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 669 transitions, 13591 flow [2024-06-21 19:04:55,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 669 transitions, 13501 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 19:04:55,294 INFO L231 Difference]: Finished difference. Result has 375 places, 650 transitions, 11847 flow [2024-06-21 19:04:55,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11569, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11847, PETRI_PLACES=375, PETRI_TRANSITIONS=650} [2024-06-21 19:04:55,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 19:04:55,295 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 650 transitions, 11847 flow [2024-06-21 19:04:55,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:55,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:04:55,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:04:55,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:04:55,295 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:04:55,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:04:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1596468712, now seen corresponding path program 1 times [2024-06-21 19:04:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:04:55,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407020192] [2024-06-21 19:04:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:04:55,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:04:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:04:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:04:57,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:04:57,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407020192] [2024-06-21 19:04:57,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407020192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:04:57,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:04:57,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:04:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177598407] [2024-06-21 19:04:57,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:04:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:04:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:04:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:04:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:04:57,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:04:57,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 650 transitions, 11847 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:04:57,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:04:57,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:04:57,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:04:59,752 INFO L124 PetriNetUnfolderBase]: 4557/6935 cut-off events. [2024-06-21 19:04:59,753 INFO L125 PetriNetUnfolderBase]: For 1140531/1140531 co-relation queries the response was YES. [2024-06-21 19:04:59,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69208 conditions, 6935 events. 4557/6935 cut-off events. For 1140531/1140531 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38773 event pairs, 1676 based on Foata normal form. 3/6937 useless extension candidates. Maximal degree in co-relation 69024. Up to 6797 conditions per place. [2024-06-21 19:04:59,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 626 selfloop transitions, 45 changer transitions 0/674 dead transitions. [2024-06-21 19:04:59,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 674 transitions, 13533 flow [2024-06-21 19:04:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:04:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:04:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 19:04:59,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 19:04:59,859 INFO L175 Difference]: Start difference. First operand has 375 places, 650 transitions, 11847 flow. Second operand 8 states and 136 transitions. [2024-06-21 19:04:59,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 674 transitions, 13533 flow [2024-06-21 19:05:02,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 674 transitions, 13474 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 19:05:02,204 INFO L231 Difference]: Finished difference. Result has 381 places, 656 transitions, 11997 flow [2024-06-21 19:05:02,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11788, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11997, PETRI_PLACES=381, PETRI_TRANSITIONS=656} [2024-06-21 19:05:02,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 19:05:02,205 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 656 transitions, 11997 flow [2024-06-21 19:05:02,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:02,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:02,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:02,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:05:02,206 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:02,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:02,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1596468929, now seen corresponding path program 3 times [2024-06-21 19:05:02,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:02,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380149786] [2024-06-21 19:05:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:02,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:04,401 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 19:05:04,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:04,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380149786] [2024-06-21 19:05:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380149786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:04,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536100001] [2024-06-21 19:05:04,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:04,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:04,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:05:04,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 656 transitions, 11997 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:04,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:04,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:05:04,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:06,662 INFO L124 PetriNetUnfolderBase]: 4551/6927 cut-off events. [2024-06-21 19:05:06,663 INFO L125 PetriNetUnfolderBase]: For 1152506/1152506 co-relation queries the response was YES. [2024-06-21 19:05:06,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69588 conditions, 6927 events. 4551/6927 cut-off events. For 1152506/1152506 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38741 event pairs, 1670 based on Foata normal form. 2/6928 useless extension candidates. Maximal degree in co-relation 69400. Up to 6749 conditions per place. [2024-06-21 19:05:06,776 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 616 selfloop transitions, 55 changer transitions 0/674 dead transitions. [2024-06-21 19:05:06,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 674 transitions, 13603 flow [2024-06-21 19:05:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 19:05:06,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 19:05:06,777 INFO L175 Difference]: Start difference. First operand has 381 places, 656 transitions, 11997 flow. Second operand 8 states and 135 transitions. [2024-06-21 19:05:06,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 674 transitions, 13603 flow [2024-06-21 19:05:09,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 674 transitions, 13513 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 19:05:09,378 INFO L231 Difference]: Finished difference. Result has 385 places, 656 transitions, 12026 flow [2024-06-21 19:05:09,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11907, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12026, PETRI_PLACES=385, PETRI_TRANSITIONS=656} [2024-06-21 19:05:09,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-21 19:05:09,379 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 656 transitions, 12026 flow [2024-06-21 19:05:09,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:09,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:09,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:09,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:05:09,379 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:09,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1726421741, now seen corresponding path program 4 times [2024-06-21 19:05:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:09,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840853186] [2024-06-21 19:05:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:11,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:11,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840853186] [2024-06-21 19:05:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840853186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:11,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:11,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635689323] [2024-06-21 19:05:11,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:11,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:11,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:11,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:05:11,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 656 transitions, 12026 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:11,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:11,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:05:11,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:13,946 INFO L124 PetriNetUnfolderBase]: 4561/6942 cut-off events. [2024-06-21 19:05:13,946 INFO L125 PetriNetUnfolderBase]: For 1175883/1175883 co-relation queries the response was YES. [2024-06-21 19:05:14,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70021 conditions, 6942 events. 4561/6942 cut-off events. For 1175883/1175883 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 38791 event pairs, 1671 based on Foata normal form. 2/6943 useless extension candidates. Maximal degree in co-relation 69830. Up to 6759 conditions per place. [2024-06-21 19:05:14,046 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 614 selfloop transitions, 56 changer transitions 0/673 dead transitions. [2024-06-21 19:05:14,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 673 transitions, 13670 flow [2024-06-21 19:05:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 19:05:14,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 19:05:14,047 INFO L175 Difference]: Start difference. First operand has 385 places, 656 transitions, 12026 flow. Second operand 8 states and 132 transitions. [2024-06-21 19:05:14,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 673 transitions, 13670 flow [2024-06-21 19:05:17,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 673 transitions, 13541 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:05:17,230 INFO L231 Difference]: Finished difference. Result has 387 places, 659 transitions, 12079 flow [2024-06-21 19:05:17,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11903, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12079, PETRI_PLACES=387, PETRI_TRANSITIONS=659} [2024-06-21 19:05:17,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 19:05:17,231 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 659 transitions, 12079 flow [2024-06-21 19:05:17,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:17,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:17,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:17,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:05:17,231 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:17,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1190278957, now seen corresponding path program 5 times [2024-06-21 19:05:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:17,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945517246] [2024-06-21 19:05:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:17,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:19,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:19,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945517246] [2024-06-21 19:05:19,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945517246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:19,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:19,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:19,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66842320] [2024-06-21 19:05:19,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:19,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:19,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:19,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:19,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:05:19,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 659 transitions, 12079 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:19,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:19,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:05:19,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:21,850 INFO L124 PetriNetUnfolderBase]: 4571/6956 cut-off events. [2024-06-21 19:05:21,850 INFO L125 PetriNetUnfolderBase]: For 1199310/1199310 co-relation queries the response was YES. [2024-06-21 19:05:21,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70366 conditions, 6956 events. 4571/6956 cut-off events. For 1199310/1199310 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 38906 event pairs, 1669 based on Foata normal form. 2/6957 useless extension candidates. Maximal degree in co-relation 70172. Up to 6769 conditions per place. [2024-06-21 19:05:21,971 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 611 selfloop transitions, 62 changer transitions 0/676 dead transitions. [2024-06-21 19:05:21,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 676 transitions, 13731 flow [2024-06-21 19:05:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 19:05:21,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 19:05:21,975 INFO L175 Difference]: Start difference. First operand has 387 places, 659 transitions, 12079 flow. Second operand 8 states and 131 transitions. [2024-06-21 19:05:21,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 676 transitions, 13731 flow [2024-06-21 19:05:25,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 676 transitions, 13564 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 19:05:25,753 INFO L231 Difference]: Finished difference. Result has 390 places, 662 transitions, 12106 flow [2024-06-21 19:05:25,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11931, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12106, PETRI_PLACES=390, PETRI_TRANSITIONS=662} [2024-06-21 19:05:25,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-21 19:05:25,754 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 662 transitions, 12106 flow [2024-06-21 19:05:25,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:25,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:25,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:25,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:05:25,755 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:25,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1190278740, now seen corresponding path program 2 times [2024-06-21 19:05:25,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:25,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126144809] [2024-06-21 19:05:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:25,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:27,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:27,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126144809] [2024-06-21 19:05:27,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126144809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:27,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:27,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:27,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832103474] [2024-06-21 19:05:27,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:27,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:27,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:27,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:27,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:28,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:05:28,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 662 transitions, 12106 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:28,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:28,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:05:28,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:30,619 INFO L124 PetriNetUnfolderBase]: 4610/7009 cut-off events. [2024-06-21 19:05:30,619 INFO L125 PetriNetUnfolderBase]: For 1241969/1241973 co-relation queries the response was YES. [2024-06-21 19:05:30,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71256 conditions, 7009 events. 4610/7009 cut-off events. For 1241969/1241973 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39200 event pairs, 1667 based on Foata normal form. 7/7015 useless extension candidates. Maximal degree in co-relation 71059. Up to 6852 conditions per place. [2024-06-21 19:05:30,711 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 632 selfloop transitions, 51 changer transitions 0/686 dead transitions. [2024-06-21 19:05:30,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 686 transitions, 14020 flow [2024-06-21 19:05:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 19:05:30,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 19:05:30,712 INFO L175 Difference]: Start difference. First operand has 390 places, 662 transitions, 12106 flow. Second operand 8 states and 133 transitions. [2024-06-21 19:05:30,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 686 transitions, 14020 flow [2024-06-21 19:05:34,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 686 transitions, 13901 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 19:05:34,025 INFO L231 Difference]: Finished difference. Result has 393 places, 668 transitions, 12205 flow [2024-06-21 19:05:34,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11987, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12205, PETRI_PLACES=393, PETRI_TRANSITIONS=668} [2024-06-21 19:05:34,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 19:05:34,026 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 668 transitions, 12205 flow [2024-06-21 19:05:34,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:34,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:34,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:34,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:05:34,026 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:34,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:34,027 INFO L85 PathProgramCache]: Analyzing trace with hash -465500489, now seen corresponding path program 6 times [2024-06-21 19:05:34,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:34,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921841493] [2024-06-21 19:05:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:34,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:36,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:36,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921841493] [2024-06-21 19:05:36,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921841493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:36,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:36,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:36,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108883332] [2024-06-21 19:05:36,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:36,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:36,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:36,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:36,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:36,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:05:36,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 668 transitions, 12205 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:36,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:36,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:05:36,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:38,600 INFO L124 PetriNetUnfolderBase]: 4604/7002 cut-off events. [2024-06-21 19:05:38,600 INFO L125 PetriNetUnfolderBase]: For 1251861/1251861 co-relation queries the response was YES. [2024-06-21 19:05:38,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71223 conditions, 7002 events. 4604/7002 cut-off events. For 1251861/1251861 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39172 event pairs, 1672 based on Foata normal form. 2/7003 useless extension candidates. Maximal degree in co-relation 71024. Up to 6818 conditions per place. [2024-06-21 19:05:38,717 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 621 selfloop transitions, 58 changer transitions 0/682 dead transitions. [2024-06-21 19:05:38,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 682 transitions, 13621 flow [2024-06-21 19:05:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 19:05:38,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 19:05:38,718 INFO L175 Difference]: Start difference. First operand has 393 places, 668 transitions, 12205 flow. Second operand 8 states and 133 transitions. [2024-06-21 19:05:38,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 682 transitions, 13621 flow [2024-06-21 19:05:41,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 682 transitions, 13453 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 19:05:41,956 INFO L231 Difference]: Finished difference. Result has 397 places, 668 transitions, 12161 flow [2024-06-21 19:05:41,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12037, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12161, PETRI_PLACES=397, PETRI_TRANSITIONS=668} [2024-06-21 19:05:41,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 19:05:41,957 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 668 transitions, 12161 flow [2024-06-21 19:05:41,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:41,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:41,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:41,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 19:05:41,957 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:41,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:41,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1197630390, now seen corresponding path program 3 times [2024-06-21 19:05:41,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:41,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907237962] [2024-06-21 19:05:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:41,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:44,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:44,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907237962] [2024-06-21 19:05:44,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907237962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:44,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:44,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:44,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27533599] [2024-06-21 19:05:44,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:44,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:44,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:44,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:44,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:44,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:05:44,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 668 transitions, 12161 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:44,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:44,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:05:44,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:46,469 INFO L124 PetriNetUnfolderBase]: 4595/6989 cut-off events. [2024-06-21 19:05:46,469 INFO L125 PetriNetUnfolderBase]: For 1263792/1263796 co-relation queries the response was YES. [2024-06-21 19:05:46,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70831 conditions, 6989 events. 4595/6989 cut-off events. For 1263792/1263796 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39143 event pairs, 1664 based on Foata normal form. 7/6995 useless extension candidates. Maximal degree in co-relation 70629. Up to 6837 conditions per place. [2024-06-21 19:05:46,585 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 633 selfloop transitions, 49 changer transitions 0/685 dead transitions. [2024-06-21 19:05:46,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 685 transitions, 13775 flow [2024-06-21 19:05:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 19:05:46,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 19:05:46,586 INFO L175 Difference]: Start difference. First operand has 397 places, 668 transitions, 12161 flow. Second operand 8 states and 133 transitions. [2024-06-21 19:05:46,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 685 transitions, 13775 flow [2024-06-21 19:05:49,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 685 transitions, 13624 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:05:49,331 INFO L231 Difference]: Finished difference. Result has 399 places, 668 transitions, 12116 flow [2024-06-21 19:05:49,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12010, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12116, PETRI_PLACES=399, PETRI_TRANSITIONS=668} [2024-06-21 19:05:49,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-21 19:05:49,331 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 668 transitions, 12116 flow [2024-06-21 19:05:49,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:49,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:49,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:49,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 19:05:49,332 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:49,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1190011830, now seen corresponding path program 4 times [2024-06-21 19:05:49,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:49,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572255601] [2024-06-21 19:05:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:51,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:51,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572255601] [2024-06-21 19:05:51,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572255601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:51,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:51,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:05:51,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712974010] [2024-06-21 19:05:51,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:51,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:05:51,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:05:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:05:51,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:05:51,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 668 transitions, 12116 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:51,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:51,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:05:51,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:05:53,804 INFO L124 PetriNetUnfolderBase]: 4586/6977 cut-off events. [2024-06-21 19:05:53,804 INFO L125 PetriNetUnfolderBase]: For 1270549/1270553 co-relation queries the response was YES. [2024-06-21 19:05:53,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70537 conditions, 6977 events. 4586/6977 cut-off events. For 1270549/1270553 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39055 event pairs, 1662 based on Foata normal form. 7/6983 useless extension candidates. Maximal degree in co-relation 70333. Up to 6830 conditions per place. [2024-06-21 19:05:53,915 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 625 selfloop transitions, 54 changer transitions 0/682 dead transitions. [2024-06-21 19:05:53,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 682 transitions, 13520 flow [2024-06-21 19:05:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:05:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:05:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 19:05:53,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 19:05:53,917 INFO L175 Difference]: Start difference. First operand has 399 places, 668 transitions, 12116 flow. Second operand 8 states and 128 transitions. [2024-06-21 19:05:53,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 682 transitions, 13520 flow [2024-06-21 19:05:56,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 682 transitions, 13402 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 19:05:56,518 INFO L231 Difference]: Finished difference. Result has 401 places, 668 transitions, 12115 flow [2024-06-21 19:05:56,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11998, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12115, PETRI_PLACES=401, PETRI_TRANSITIONS=668} [2024-06-21 19:05:56,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-21 19:05:56,519 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 668 transitions, 12115 flow [2024-06-21 19:05:56,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:56,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:05:56,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:05:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 19:05:56,519 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:05:56,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:05:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash 169919256, now seen corresponding path program 1 times [2024-06-21 19:05:56,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:05:56,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624471364] [2024-06-21 19:05:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:05:56,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:05:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:05:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:05:58,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:05:58,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624471364] [2024-06-21 19:05:58,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624471364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:05:58,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:05:58,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:05:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756739949] [2024-06-21 19:05:58,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:05:58,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:05:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:05:58,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:05:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:05:58,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 19:05:58,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 668 transitions, 12115 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:05:58,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:05:58,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 19:05:58,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:00,021 INFO L124 PetriNetUnfolderBase]: 3925/6329 cut-off events. [2024-06-21 19:06:00,021 INFO L125 PetriNetUnfolderBase]: For 1316406/1316422 co-relation queries the response was YES. [2024-06-21 19:06:00,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67410 conditions, 6329 events. 3925/6329 cut-off events. For 1316406/1316422 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 38458 event pairs, 565 based on Foata normal form. 19/6330 useless extension candidates. Maximal degree in co-relation 67204. Up to 4709 conditions per place. [2024-06-21 19:06:00,134 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 434 selfloop transitions, 173 changer transitions 0/713 dead transitions. [2024-06-21 19:06:00,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 713 transitions, 14105 flow [2024-06-21 19:06:00,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:06:00,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:06:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 19:06:00,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-21 19:06:00,135 INFO L175 Difference]: Start difference. First operand has 401 places, 668 transitions, 12115 flow. Second operand 8 states and 175 transitions. [2024-06-21 19:06:00,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 713 transitions, 14105 flow [2024-06-21 19:06:02,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 713 transitions, 13983 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 19:06:02,877 INFO L231 Difference]: Finished difference. Result has 406 places, 680 transitions, 12705 flow [2024-06-21 19:06:02,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11993, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12705, PETRI_PLACES=406, PETRI_TRANSITIONS=680} [2024-06-21 19:06:02,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 19:06:02,877 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 680 transitions, 12705 flow [2024-06-21 19:06:02,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:02,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:02,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:02,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 19:06:02,878 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:02,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:02,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1160064946, now seen corresponding path program 1 times [2024-06-21 19:06:02,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:02,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466447823] [2024-06-21 19:06:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:02,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:04,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:04,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466447823] [2024-06-21 19:06:04,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466447823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:04,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:04,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:06:04,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71365737] [2024-06-21 19:06:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:04,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:06:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:06:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:06:04,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:06:04,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 680 transitions, 12705 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:04,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:04,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:06:04,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:07,352 INFO L124 PetriNetUnfolderBase]: 4662/7087 cut-off events. [2024-06-21 19:06:07,352 INFO L125 PetriNetUnfolderBase]: For 1335373/1335388 co-relation queries the response was YES. [2024-06-21 19:06:07,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73185 conditions, 7087 events. 4662/7087 cut-off events. For 1335373/1335388 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39818 event pairs, 1046 based on Foata normal form. 16/7102 useless extension candidates. Maximal degree in co-relation 72975. Up to 6130 conditions per place. [2024-06-21 19:06:07,446 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 482 selfloop transitions, 234 changer transitions 0/719 dead transitions. [2024-06-21 19:06:07,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 719 transitions, 14857 flow [2024-06-21 19:06:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 19:06:07,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 19:06:07,447 INFO L175 Difference]: Start difference. First operand has 406 places, 680 transitions, 12705 flow. Second operand 9 states and 167 transitions. [2024-06-21 19:06:07,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 719 transitions, 14857 flow [2024-06-21 19:06:10,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 719 transitions, 14709 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 19:06:10,339 INFO L231 Difference]: Finished difference. Result has 411 places, 691 transitions, 13262 flow [2024-06-21 19:06:10,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12567, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13262, PETRI_PLACES=411, PETRI_TRANSITIONS=691} [2024-06-21 19:06:10,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-21 19:06:10,339 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 691 transitions, 13262 flow [2024-06-21 19:06:10,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:10,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:10,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:10,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 19:06:10,340 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:10,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1743588938, now seen corresponding path program 2 times [2024-06-21 19:06:10,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:10,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863529142] [2024-06-21 19:06:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:10,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:12,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:12,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863529142] [2024-06-21 19:06:12,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863529142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:12,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:12,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:12,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80890909] [2024-06-21 19:06:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:12,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:12,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:12,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:13,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:06:13,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 691 transitions, 13262 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:13,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:13,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:06:13,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:15,061 INFO L124 PetriNetUnfolderBase]: 4615/7056 cut-off events. [2024-06-21 19:06:15,061 INFO L125 PetriNetUnfolderBase]: For 1371139/1371157 co-relation queries the response was YES. [2024-06-21 19:06:15,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74078 conditions, 7056 events. 4615/7056 cut-off events. For 1371139/1371157 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 39903 event pairs, 914 based on Foata normal form. 18/7066 useless extension candidates. Maximal degree in co-relation 73868. Up to 6139 conditions per place. [2024-06-21 19:06:15,186 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 491 selfloop transitions, 196 changer transitions 0/730 dead transitions. [2024-06-21 19:06:15,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 730 transitions, 15066 flow [2024-06-21 19:06:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 19:06:15,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-21 19:06:15,188 INFO L175 Difference]: Start difference. First operand has 411 places, 691 transitions, 13262 flow. Second operand 9 states and 182 transitions. [2024-06-21 19:06:15,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 730 transitions, 15066 flow [2024-06-21 19:06:18,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 730 transitions, 14881 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 19:06:18,209 INFO L231 Difference]: Finished difference. Result has 416 places, 698 transitions, 13598 flow [2024-06-21 19:06:18,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13079, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13598, PETRI_PLACES=416, PETRI_TRANSITIONS=698} [2024-06-21 19:06:18,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 19:06:18,209 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 698 transitions, 13598 flow [2024-06-21 19:06:18,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:18,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:18,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:18,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 19:06:18,210 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:18,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:18,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1743349928, now seen corresponding path program 3 times [2024-06-21 19:06:18,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:18,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268119101] [2024-06-21 19:06:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:18,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:20,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:20,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268119101] [2024-06-21 19:06:20,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268119101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:20,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:20,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:20,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293505058] [2024-06-21 19:06:20,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:20,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:20,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:20,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:06:20,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 698 transitions, 13598 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:20,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:20,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:06:20,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:22,865 INFO L124 PetriNetUnfolderBase]: 4627/7076 cut-off events. [2024-06-21 19:06:22,865 INFO L125 PetriNetUnfolderBase]: For 1363189/1363205 co-relation queries the response was YES. [2024-06-21 19:06:22,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74736 conditions, 7076 events. 4627/7076 cut-off events. For 1363189/1363205 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 40286 event pairs, 1089 based on Foata normal form. 18/7090 useless extension candidates. Maximal degree in co-relation 74524. Up to 6291 conditions per place. [2024-06-21 19:06:22,980 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 498 selfloop transitions, 187 changer transitions 0/728 dead transitions. [2024-06-21 19:06:22,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 728 transitions, 15140 flow [2024-06-21 19:06:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:22,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 19:06:22,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 19:06:22,981 INFO L175 Difference]: Start difference. First operand has 416 places, 698 transitions, 13598 flow. Second operand 9 states and 177 transitions. [2024-06-21 19:06:22,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 728 transitions, 15140 flow [2024-06-21 19:06:26,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 728 transitions, 14656 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 19:06:26,364 INFO L231 Difference]: Finished difference. Result has 419 places, 701 transitions, 13566 flow [2024-06-21 19:06:26,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13133, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13566, PETRI_PLACES=419, PETRI_TRANSITIONS=701} [2024-06-21 19:06:26,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-21 19:06:26,365 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 701 transitions, 13566 flow [2024-06-21 19:06:26,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:26,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:26,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:26,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 19:06:26,365 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:26,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1790737795, now seen corresponding path program 1 times [2024-06-21 19:06:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:26,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921507528] [2024-06-21 19:06:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:26,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:29,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:29,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921507528] [2024-06-21 19:06:29,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921507528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:29,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:29,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:06:29,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806603277] [2024-06-21 19:06:29,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:29,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:06:29,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:06:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:06:29,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:29,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 701 transitions, 13566 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:29,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:29,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:29,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:31,501 INFO L124 PetriNetUnfolderBase]: 4756/7223 cut-off events. [2024-06-21 19:06:31,501 INFO L125 PetriNetUnfolderBase]: For 1387962/1387977 co-relation queries the response was YES. [2024-06-21 19:06:31,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75827 conditions, 7223 events. 4756/7223 cut-off events. For 1387962/1387977 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 40702 event pairs, 1158 based on Foata normal form. 16/7238 useless extension candidates. Maximal degree in co-relation 75614. Up to 6153 conditions per place. [2024-06-21 19:06:31,608 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 491 selfloop transitions, 267 changer transitions 0/761 dead transitions. [2024-06-21 19:06:31,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 761 transitions, 16474 flow [2024-06-21 19:06:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 19:06:31,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-21 19:06:31,609 INFO L175 Difference]: Start difference. First operand has 419 places, 701 transitions, 13566 flow. Second operand 9 states and 186 transitions. [2024-06-21 19:06:31,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 761 transitions, 16474 flow [2024-06-21 19:06:34,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 761 transitions, 16086 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 19:06:34,926 INFO L231 Difference]: Finished difference. Result has 424 places, 730 transitions, 14393 flow [2024-06-21 19:06:34,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13178, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14393, PETRI_PLACES=424, PETRI_TRANSITIONS=730} [2024-06-21 19:06:34,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-21 19:06:34,927 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 730 transitions, 14393 flow [2024-06-21 19:06:34,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:34,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:34,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:34,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 19:06:34,927 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:34,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1743349618, now seen corresponding path program 2 times [2024-06-21 19:06:34,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:34,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405561633] [2024-06-21 19:06:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:34,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:37,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405561633] [2024-06-21 19:06:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405561633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:37,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:37,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306433479] [2024-06-21 19:06:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:37,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:37,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:37,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:37,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 730 transitions, 14393 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:37,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:37,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:37,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:39,549 INFO L124 PetriNetUnfolderBase]: 4746/7209 cut-off events. [2024-06-21 19:06:39,549 INFO L125 PetriNetUnfolderBase]: For 1410378/1410393 co-relation queries the response was YES. [2024-06-21 19:06:39,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77144 conditions, 7209 events. 4746/7209 cut-off events. For 1410378/1410393 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 40608 event pairs, 1152 based on Foata normal form. 16/7224 useless extension candidates. Maximal degree in co-relation 76928. Up to 6343 conditions per place. [2024-06-21 19:06:39,672 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 493 selfloop transitions, 262 changer transitions 0/758 dead transitions. [2024-06-21 19:06:39,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 758 transitions, 16427 flow [2024-06-21 19:06:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:06:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:06:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 19:06:39,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 19:06:39,673 INFO L175 Difference]: Start difference. First operand has 424 places, 730 transitions, 14393 flow. Second operand 9 states and 175 transitions. [2024-06-21 19:06:39,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 758 transitions, 16427 flow [2024-06-21 19:06:43,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 758 transitions, 16245 flow, removed 86 selfloop flow, removed 1 redundant places. [2024-06-21 19:06:43,479 INFO L231 Difference]: Finished difference. Result has 432 places, 730 transitions, 14747 flow [2024-06-21 19:06:43,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14211, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14747, PETRI_PLACES=432, PETRI_TRANSITIONS=730} [2024-06-21 19:06:43,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-21 19:06:43,479 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 730 transitions, 14747 flow [2024-06-21 19:06:43,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:43,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:43,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:43,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 19:06:43,480 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:43,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:43,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1219335848, now seen corresponding path program 4 times [2024-06-21 19:06:43,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:43,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630413840] [2024-06-21 19:06:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:43,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:45,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:45,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630413840] [2024-06-21 19:06:45,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630413840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:45,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:45,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:45,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229124349] [2024-06-21 19:06:45,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:45,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:45,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:45,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:45,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:45,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:06:45,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 730 transitions, 14747 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:45,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:45,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:06:45,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:48,227 INFO L124 PetriNetUnfolderBase]: 4674/7145 cut-off events. [2024-06-21 19:06:48,227 INFO L125 PetriNetUnfolderBase]: For 1452558/1452573 co-relation queries the response was YES. [2024-06-21 19:06:48,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77659 conditions, 7145 events. 4674/7145 cut-off events. For 1452558/1452573 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 40678 event pairs, 1097 based on Foata normal form. 18/7162 useless extension candidates. Maximal degree in co-relation 77439. Up to 6478 conditions per place. [2024-06-21 19:06:48,353 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 553 selfloop transitions, 162 changer transitions 0/759 dead transitions. [2024-06-21 19:06:48,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 759 transitions, 16324 flow [2024-06-21 19:06:48,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:06:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:06:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 19:06:48,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 19:06:48,354 INFO L175 Difference]: Start difference. First operand has 432 places, 730 transitions, 14747 flow. Second operand 10 states and 179 transitions. [2024-06-21 19:06:48,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 759 transitions, 16324 flow [2024-06-21 19:06:52,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 759 transitions, 15838 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:06:52,265 INFO L231 Difference]: Finished difference. Result has 434 places, 733 transitions, 14646 flow [2024-06-21 19:06:52,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14261, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14646, PETRI_PLACES=434, PETRI_TRANSITIONS=733} [2024-06-21 19:06:52,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 19:06:52,266 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 733 transitions, 14646 flow [2024-06-21 19:06:52,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:52,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:06:52,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:06:52,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 19:06:52,266 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:06:52,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:06:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1236306178, now seen corresponding path program 3 times [2024-06-21 19:06:52,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:06:52,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083339081] [2024-06-21 19:06:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:06:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:06:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:06:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:06:54,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:06:54,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083339081] [2024-06-21 19:06:54,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083339081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:06:54,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:06:54,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:06:54,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498683681] [2024-06-21 19:06:54,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:06:54,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:06:54,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:06:54,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:06:54,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:06:54,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:06:54,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 733 transitions, 14646 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:06:54,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:06:54,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:06:54,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:06:57,116 INFO L124 PetriNetUnfolderBase]: 4772/7247 cut-off events. [2024-06-21 19:06:57,117 INFO L125 PetriNetUnfolderBase]: For 1461941/1461956 co-relation queries the response was YES. [2024-06-21 19:06:57,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78255 conditions, 7247 events. 4772/7247 cut-off events. For 1461941/1461956 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 40885 event pairs, 1155 based on Foata normal form. 16/7262 useless extension candidates. Maximal degree in co-relation 78035. Up to 6588 conditions per place. [2024-06-21 19:06:57,230 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 525 selfloop transitions, 235 changer transitions 0/763 dead transitions. [2024-06-21 19:06:57,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 763 transitions, 16536 flow [2024-06-21 19:06:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:06:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:06:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 19:06:57,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 19:06:57,231 INFO L175 Difference]: Start difference. First operand has 434 places, 733 transitions, 14646 flow. Second operand 10 states and 174 transitions. [2024-06-21 19:06:57,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 763 transitions, 16536 flow [2024-06-21 19:07:01,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 763 transitions, 16184 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 19:07:01,563 INFO L231 Difference]: Finished difference. Result has 436 places, 737 transitions, 14843 flow [2024-06-21 19:07:01,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14294, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14843, PETRI_PLACES=436, PETRI_TRANSITIONS=737} [2024-06-21 19:07:01,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-21 19:07:01,563 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 737 transitions, 14843 flow [2024-06-21 19:07:01,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:01,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:01,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:01,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 19:07:01,564 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:01,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1236316408, now seen corresponding path program 4 times [2024-06-21 19:07:01,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:01,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793365335] [2024-06-21 19:07:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:01,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:03,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:03,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793365335] [2024-06-21 19:07:03,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793365335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:03,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:03,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:07:03,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384917499] [2024-06-21 19:07:03,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:03,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:07:03,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:03,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:07:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:07:04,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:04,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 737 transitions, 14843 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:04,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:04,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:04,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:06,151 INFO L124 PetriNetUnfolderBase]: 4798/7283 cut-off events. [2024-06-21 19:07:06,151 INFO L125 PetriNetUnfolderBase]: For 1499920/1499935 co-relation queries the response was YES. [2024-06-21 19:07:06,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79165 conditions, 7283 events. 4798/7283 cut-off events. For 1499920/1499935 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 41083 event pairs, 1153 based on Foata normal form. 16/7298 useless extension candidates. Maximal degree in co-relation 78944. Up to 6572 conditions per place. [2024-06-21 19:07:06,277 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 248 changer transitions 0/768 dead transitions. [2024-06-21 19:07:06,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 768 transitions, 17025 flow [2024-06-21 19:07:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 19:07:06,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 19:07:06,279 INFO L175 Difference]: Start difference. First operand has 436 places, 737 transitions, 14843 flow. Second operand 9 states and 169 transitions. [2024-06-21 19:07:06,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 768 transitions, 17025 flow [2024-06-21 19:07:10,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 768 transitions, 16657 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 19:07:10,819 INFO L231 Difference]: Finished difference. Result has 438 places, 745 transitions, 15127 flow [2024-06-21 19:07:10,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14475, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15127, PETRI_PLACES=438, PETRI_TRANSITIONS=745} [2024-06-21 19:07:10,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 19:07:10,819 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 745 transitions, 15127 flow [2024-06-21 19:07:10,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:10,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:10,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:10,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 19:07:10,820 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:10,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:10,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1236305806, now seen corresponding path program 1 times [2024-06-21 19:07:10,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:10,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906254184] [2024-06-21 19:07:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:13,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:13,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906254184] [2024-06-21 19:07:13,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906254184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:13,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:13,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:07:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335358333] [2024-06-21 19:07:13,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:13,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:07:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:07:13,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:07:13,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:07:13,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 745 transitions, 15127 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:13,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:13,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:07:13,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:15,771 INFO L124 PetriNetUnfolderBase]: 4808/7297 cut-off events. [2024-06-21 19:07:15,771 INFO L125 PetriNetUnfolderBase]: For 1529461/1529476 co-relation queries the response was YES. [2024-06-21 19:07:15,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79692 conditions, 7297 events. 4808/7297 cut-off events. For 1529461/1529476 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 41202 event pairs, 1161 based on Foata normal form. 16/7312 useless extension candidates. Maximal degree in co-relation 79470. Up to 6472 conditions per place. [2024-06-21 19:07:15,898 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 536 selfloop transitions, 237 changer transitions 0/776 dead transitions. [2024-06-21 19:07:15,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 776 transitions, 17282 flow [2024-06-21 19:07:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:07:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:07:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 19:07:15,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 19:07:15,899 INFO L175 Difference]: Start difference. First operand has 438 places, 745 transitions, 15127 flow. Second operand 10 states and 178 transitions. [2024-06-21 19:07:15,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 776 transitions, 17282 flow [2024-06-21 19:07:19,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 776 transitions, 16920 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 19:07:19,988 INFO L231 Difference]: Finished difference. Result has 443 places, 749 transitions, 15329 flow [2024-06-21 19:07:19,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14765, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15329, PETRI_PLACES=443, PETRI_TRANSITIONS=749} [2024-06-21 19:07:19,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-21 19:07:19,989 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 749 transitions, 15329 flow [2024-06-21 19:07:19,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:19,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:19,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:19,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 19:07:19,990 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:19,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:19,990 INFO L85 PathProgramCache]: Analyzing trace with hash 613697320, now seen corresponding path program 1 times [2024-06-21 19:07:19,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:19,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096702271] [2024-06-21 19:07:19,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:19,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:22,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:22,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096702271] [2024-06-21 19:07:22,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096702271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:22,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:22,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:22,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848993525] [2024-06-21 19:07:22,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:22,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:22,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:22,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:22,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:22,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:22,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 749 transitions, 15329 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:22,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:22,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:22,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:25,033 INFO L124 PetriNetUnfolderBase]: 4727/7220 cut-off events. [2024-06-21 19:07:25,033 INFO L125 PetriNetUnfolderBase]: For 1561234/1561250 co-relation queries the response was YES. [2024-06-21 19:07:25,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80063 conditions, 7220 events. 4727/7220 cut-off events. For 1561234/1561250 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41133 event pairs, 1100 based on Foata normal form. 16/7235 useless extension candidates. Maximal degree in co-relation 79839. Up to 6526 conditions per place. [2024-06-21 19:07:25,159 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 620 selfloop transitions, 111 changer transitions 0/778 dead transitions. [2024-06-21 19:07:25,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 778 transitions, 16977 flow [2024-06-21 19:07:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 19:07:25,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 19:07:25,161 INFO L175 Difference]: Start difference. First operand has 443 places, 749 transitions, 15329 flow. Second operand 9 states and 166 transitions. [2024-06-21 19:07:25,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 778 transitions, 16977 flow [2024-06-21 19:07:29,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 778 transitions, 16561 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 19:07:29,840 INFO L231 Difference]: Finished difference. Result has 445 places, 753 transitions, 15231 flow [2024-06-21 19:07:29,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14913, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15231, PETRI_PLACES=445, PETRI_TRANSITIONS=753} [2024-06-21 19:07:29,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-21 19:07:29,841 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 753 transitions, 15231 flow [2024-06-21 19:07:29,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:29,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:29,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:29,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 19:07:29,842 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:29,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1927939670, now seen corresponding path program 1 times [2024-06-21 19:07:29,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:29,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784839650] [2024-06-21 19:07:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:29,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:32,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:32,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784839650] [2024-06-21 19:07:32,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784839650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:32,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:32,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663286128] [2024-06-21 19:07:32,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:32,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:32,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:32,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:32,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:32,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:07:32,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 753 transitions, 15231 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:32,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:32,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:07:32,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:34,690 INFO L124 PetriNetUnfolderBase]: 4854/7360 cut-off events. [2024-06-21 19:07:34,690 INFO L125 PetriNetUnfolderBase]: For 1610819/1610839 co-relation queries the response was YES. [2024-06-21 19:07:34,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81762 conditions, 7360 events. 4854/7360 cut-off events. For 1610819/1610839 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 41535 event pairs, 1177 based on Foata normal form. 22/7381 useless extension candidates. Maximal degree in co-relation 81537. Up to 6699 conditions per place. [2024-06-21 19:07:34,826 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 578 selfloop transitions, 209 changer transitions 0/790 dead transitions. [2024-06-21 19:07:34,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 790 transitions, 17878 flow [2024-06-21 19:07:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 19:07:34,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 19:07:34,828 INFO L175 Difference]: Start difference. First operand has 445 places, 753 transitions, 15231 flow. Second operand 9 states and 163 transitions. [2024-06-21 19:07:34,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 790 transitions, 17878 flow [2024-06-21 19:07:39,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 790 transitions, 17579 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 19:07:39,528 INFO L231 Difference]: Finished difference. Result has 447 places, 765 transitions, 15689 flow [2024-06-21 19:07:39,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14932, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15689, PETRI_PLACES=447, PETRI_TRANSITIONS=765} [2024-06-21 19:07:39,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-21 19:07:39,528 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 765 transitions, 15689 flow [2024-06-21 19:07:39,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:39,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:39,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 19:07:39,529 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:39,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1927939856, now seen corresponding path program 2 times [2024-06-21 19:07:39,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:39,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039520367] [2024-06-21 19:07:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:41,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:41,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039520367] [2024-06-21 19:07:41,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039520367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:41,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:41,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:41,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046749548] [2024-06-21 19:07:41,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:41,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:41,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:41,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:41,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 765 transitions, 15689 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:41,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:41,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:41,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:44,250 INFO L124 PetriNetUnfolderBase]: 4801/7324 cut-off events. [2024-06-21 19:07:44,251 INFO L125 PetriNetUnfolderBase]: For 1658051/1658067 co-relation queries the response was YES. [2024-06-21 19:07:44,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82642 conditions, 7324 events. 4801/7324 cut-off events. For 1658051/1658067 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 41801 event pairs, 1119 based on Foata normal form. 16/7339 useless extension candidates. Maximal degree in co-relation 82416. Up to 6295 conditions per place. [2024-06-21 19:07:44,383 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 606 selfloop transitions, 157 changer transitions 0/813 dead transitions. [2024-06-21 19:07:44,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 813 transitions, 18404 flow [2024-06-21 19:07:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 19:07:44,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 19:07:44,384 INFO L175 Difference]: Start difference. First operand has 447 places, 765 transitions, 15689 flow. Second operand 9 states and 172 transitions. [2024-06-21 19:07:44,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 813 transitions, 18404 flow [2024-06-21 19:07:49,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 813 transitions, 17802 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 19:07:49,384 INFO L231 Difference]: Finished difference. Result has 452 places, 786 transitions, 15868 flow [2024-06-21 19:07:49,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15087, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15868, PETRI_PLACES=452, PETRI_TRANSITIONS=786} [2024-06-21 19:07:49,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 409 predicate places. [2024-06-21 19:07:49,385 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 786 transitions, 15868 flow [2024-06-21 19:07:49,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:49,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:49,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:49,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 19:07:49,385 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:49,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:49,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1350438286, now seen corresponding path program 3 times [2024-06-21 19:07:49,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:49,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578778065] [2024-06-21 19:07:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:49,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:07:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:07:51,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:07:51,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578778065] [2024-06-21 19:07:51,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578778065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:07:51,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:07:51,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:07:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579282478] [2024-06-21 19:07:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:07:51,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:07:51,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:07:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:07:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:07:51,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:07:51,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 786 transitions, 15868 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:51,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:07:51,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:07:51,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:07:54,391 INFO L124 PetriNetUnfolderBase]: 4797/7320 cut-off events. [2024-06-21 19:07:54,391 INFO L125 PetriNetUnfolderBase]: For 1672487/1672503 co-relation queries the response was YES. [2024-06-21 19:07:54,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83074 conditions, 7320 events. 4797/7320 cut-off events. For 1672487/1672503 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 41761 event pairs, 1124 based on Foata normal form. 16/7335 useless extension candidates. Maximal degree in co-relation 82845. Up to 6292 conditions per place. [2024-06-21 19:07:54,529 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 593 selfloop transitions, 166 changer transitions 0/809 dead transitions. [2024-06-21 19:07:54,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 809 transitions, 17972 flow [2024-06-21 19:07:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:07:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:07:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 19:07:54,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 19:07:54,531 INFO L175 Difference]: Start difference. First operand has 452 places, 786 transitions, 15868 flow. Second operand 9 states and 166 transitions. [2024-06-21 19:07:54,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 809 transitions, 17972 flow [2024-06-21 19:07:59,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 809 transitions, 17804 flow, removed 75 selfloop flow, removed 2 redundant places. [2024-06-21 19:07:59,288 INFO L231 Difference]: Finished difference. Result has 459 places, 786 transitions, 16040 flow [2024-06-21 19:07:59,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15700, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16040, PETRI_PLACES=459, PETRI_TRANSITIONS=786} [2024-06-21 19:07:59,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-21 19:07:59,288 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 786 transitions, 16040 flow [2024-06-21 19:07:59,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:07:59,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:07:59,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:07:59,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 19:07:59,289 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:07:59,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:07:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1923298040, now seen corresponding path program 2 times [2024-06-21 19:07:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:07:59,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150032797] [2024-06-21 19:07:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:07:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:07:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:01,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:01,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150032797] [2024-06-21 19:08:01,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150032797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:01,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:01,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564267240] [2024-06-21 19:08:01,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:01,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:01,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:01,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:01,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:01,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:01,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 786 transitions, 16040 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:01,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:01,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:01,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:04,381 INFO L124 PetriNetUnfolderBase]: 4910/7440 cut-off events. [2024-06-21 19:08:04,381 INFO L125 PetriNetUnfolderBase]: For 1711968/1711988 co-relation queries the response was YES. [2024-06-21 19:08:04,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84531 conditions, 7440 events. 4910/7440 cut-off events. For 1711968/1711988 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 41997 event pairs, 1146 based on Foata normal form. 22/7461 useless extension candidates. Maximal degree in co-relation 84299. Up to 6769 conditions per place. [2024-06-21 19:08:04,505 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 600 selfloop transitions, 213 changer transitions 0/816 dead transitions. [2024-06-21 19:08:04,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 816 transitions, 18613 flow [2024-06-21 19:08:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:04,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 19:08:04,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 19:08:04,507 INFO L175 Difference]: Start difference. First operand has 459 places, 786 transitions, 16040 flow. Second operand 9 states and 159 transitions. [2024-06-21 19:08:04,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 816 transitions, 18613 flow [2024-06-21 19:08:09,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 816 transitions, 18277 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 19:08:09,315 INFO L231 Difference]: Finished difference. Result has 460 places, 794 transitions, 16341 flow [2024-06-21 19:08:09,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15704, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16341, PETRI_PLACES=460, PETRI_TRANSITIONS=794} [2024-06-21 19:08:09,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-21 19:08:09,316 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 794 transitions, 16341 flow [2024-06-21 19:08:09,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:09,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:09,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:08:09,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 19:08:09,317 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:08:09,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:09,317 INFO L85 PathProgramCache]: Analyzing trace with hash 824268652, now seen corresponding path program 3 times [2024-06-21 19:08:09,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:09,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634042217] [2024-06-21 19:08:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:09,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:11,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:11,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634042217] [2024-06-21 19:08:11,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634042217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:11,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:11,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:08:11,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045969095] [2024-06-21 19:08:11,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:11,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:08:11,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:11,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:08:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:08:11,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:11,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 794 transitions, 16341 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:11,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:11,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:11,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:14,163 INFO L124 PetriNetUnfolderBase]: 4896/7421 cut-off events. [2024-06-21 19:08:14,163 INFO L125 PetriNetUnfolderBase]: For 1714039/1714059 co-relation queries the response was YES. [2024-06-21 19:08:14,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84244 conditions, 7421 events. 4896/7421 cut-off events. For 1714039/1714059 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 41910 event pairs, 1147 based on Foata normal form. 22/7442 useless extension candidates. Maximal degree in co-relation 84011. Up to 6756 conditions per place. [2024-06-21 19:08:14,300 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 599 selfloop transitions, 213 changer transitions 0/815 dead transitions. [2024-06-21 19:08:14,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 815 transitions, 18491 flow [2024-06-21 19:08:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 19:08:14,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 19:08:14,302 INFO L175 Difference]: Start difference. First operand has 460 places, 794 transitions, 16341 flow. Second operand 9 states and 157 transitions. [2024-06-21 19:08:14,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 815 transitions, 18491 flow [2024-06-21 19:08:20,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 815 transitions, 18044 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 19:08:20,338 INFO L231 Difference]: Finished difference. Result has 463 places, 794 transitions, 16341 flow [2024-06-21 19:08:20,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15894, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16341, PETRI_PLACES=463, PETRI_TRANSITIONS=794} [2024-06-21 19:08:20,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-21 19:08:20,339 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 794 transitions, 16341 flow [2024-06-21 19:08:20,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:20,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:20,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:08:20,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 19:08:20,340 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:08:20,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:20,342 INFO L85 PathProgramCache]: Analyzing trace with hash 255351848, now seen corresponding path program 2 times [2024-06-21 19:08:20,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:20,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2440954] [2024-06-21 19:08:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:20,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:22,948 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 19:08:22,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:22,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2440954] [2024-06-21 19:08:22,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2440954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:22,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:22,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:08:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110711543] [2024-06-21 19:08:22,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:22,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:08:22,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:08:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:08:23,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:23,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 794 transitions, 16341 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:23,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:23,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:23,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:25,835 INFO L124 PetriNetUnfolderBase]: 4948/7491 cut-off events. [2024-06-21 19:08:25,835 INFO L125 PetriNetUnfolderBase]: For 1755479/1755494 co-relation queries the response was YES. [2024-06-21 19:08:25,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85479 conditions, 7491 events. 4948/7491 cut-off events. For 1755479/1755494 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 42307 event pairs, 1182 based on Foata normal form. 16/7506 useless extension candidates. Maximal degree in co-relation 85245. Up to 6611 conditions per place. [2024-06-21 19:08:25,989 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 605 selfloop transitions, 228 changer transitions 0/836 dead transitions. [2024-06-21 19:08:25,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 836 transitions, 19049 flow [2024-06-21 19:08:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:08:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:08:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 19:08:25,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 19:08:25,990 INFO L175 Difference]: Start difference. First operand has 463 places, 794 transitions, 16341 flow. Second operand 10 states and 181 transitions. [2024-06-21 19:08:25,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 836 transitions, 19049 flow [2024-06-21 19:08:31,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 836 transitions, 18677 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 19:08:31,429 INFO L231 Difference]: Finished difference. Result has 467 places, 810 transitions, 16812 flow [2024-06-21 19:08:31,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15969, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16812, PETRI_PLACES=467, PETRI_TRANSITIONS=810} [2024-06-21 19:08:31,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-21 19:08:31,429 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 810 transitions, 16812 flow [2024-06-21 19:08:31,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:31,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:31,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:08:31,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 19:08:31,430 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:08:31,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2037808258, now seen corresponding path program 5 times [2024-06-21 19:08:31,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:31,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207773363] [2024-06-21 19:08:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:31,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:33,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:33,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207773363] [2024-06-21 19:08:33,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207773363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:33,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:33,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:08:33,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717785436] [2024-06-21 19:08:33,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:33,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:08:33,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:33,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:08:33,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:08:33,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:33,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 810 transitions, 16812 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:33,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:33,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:33,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:36,571 INFO L124 PetriNetUnfolderBase]: 4942/7484 cut-off events. [2024-06-21 19:08:36,571 INFO L125 PetriNetUnfolderBase]: For 1773414/1773429 co-relation queries the response was YES. [2024-06-21 19:08:36,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85779 conditions, 7484 events. 4942/7484 cut-off events. For 1773414/1773429 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 42325 event pairs, 1154 based on Foata normal form. 16/7499 useless extension candidates. Maximal degree in co-relation 85543. Up to 6794 conditions per place. [2024-06-21 19:08:36,691 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 567 selfloop transitions, 262 changer transitions 0/832 dead transitions. [2024-06-21 19:08:36,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 832 transitions, 18786 flow [2024-06-21 19:08:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 19:08:36,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 19:08:36,692 INFO L175 Difference]: Start difference. First operand has 467 places, 810 transitions, 16812 flow. Second operand 9 states and 166 transitions. [2024-06-21 19:08:36,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 832 transitions, 18786 flow [2024-06-21 19:08:42,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 832 transitions, 18479 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 19:08:42,312 INFO L231 Difference]: Finished difference. Result has 471 places, 810 transitions, 17045 flow [2024-06-21 19:08:42,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16505, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17045, PETRI_PLACES=471, PETRI_TRANSITIONS=810} [2024-06-21 19:08:42,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-21 19:08:42,312 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 810 transitions, 17045 flow [2024-06-21 19:08:42,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:42,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:42,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:08:42,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 19:08:42,313 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:08:42,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2037818798, now seen corresponding path program 5 times [2024-06-21 19:08:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:42,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033879164] [2024-06-21 19:08:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:44,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:44,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033879164] [2024-06-21 19:08:44,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033879164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:44,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:44,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:08:44,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109998056] [2024-06-21 19:08:44,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:44,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:08:44,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:44,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:08:44,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:08:45,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:08:45,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 810 transitions, 17045 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:45,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:45,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:08:45,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:48,179 INFO L124 PetriNetUnfolderBase]: 4855/7405 cut-off events. [2024-06-21 19:08:48,180 INFO L125 PetriNetUnfolderBase]: For 1825888/1825903 co-relation queries the response was YES. [2024-06-21 19:08:48,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85845 conditions, 7405 events. 4855/7405 cut-off events. For 1825888/1825903 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 42359 event pairs, 1088 based on Foata normal form. 18/7422 useless extension candidates. Maximal degree in co-relation 85608. Up to 6687 conditions per place. [2024-06-21 19:08:48,304 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 614 selfloop transitions, 169 changer transitions 0/835 dead transitions. [2024-06-21 19:08:48,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 835 transitions, 18752 flow [2024-06-21 19:08:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:08:48,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:08:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 19:08:48,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 19:08:48,306 INFO L175 Difference]: Start difference. First operand has 471 places, 810 transitions, 17045 flow. Second operand 9 states and 161 transitions. [2024-06-21 19:08:48,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 835 transitions, 18752 flow [2024-06-21 19:08:53,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 835 transitions, 18204 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 19:08:53,345 INFO L231 Difference]: Finished difference. Result has 472 places, 813 transitions, 16906 flow [2024-06-21 19:08:53,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16497, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16906, PETRI_PLACES=472, PETRI_TRANSITIONS=813} [2024-06-21 19:08:53,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-21 19:08:53,346 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 813 transitions, 16906 flow [2024-06-21 19:08:53,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:53,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:08:53,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:08:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 19:08:53,346 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:08:53,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:08:53,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1350326066, now seen corresponding path program 3 times [2024-06-21 19:08:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:08:53,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819609748] [2024-06-21 19:08:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:08:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:08:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:08:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:08:55,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:08:55,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819609748] [2024-06-21 19:08:55,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819609748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:08:55,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:08:55,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:08:55,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216574780] [2024-06-21 19:08:55,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:08:55,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:08:55,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:08:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:08:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:08:56,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:08:56,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 813 transitions, 16906 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:08:56,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:08:56,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:08:56,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:08:58,795 INFO L124 PetriNetUnfolderBase]: 4968/7523 cut-off events. [2024-06-21 19:08:58,796 INFO L125 PetriNetUnfolderBase]: For 1836600/1836620 co-relation queries the response was YES. [2024-06-21 19:08:58,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86515 conditions, 7523 events. 4968/7523 cut-off events. For 1836600/1836620 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 42558 event pairs, 1151 based on Foata normal form. 20/7542 useless extension candidates. Maximal degree in co-relation 86277. Up to 6637 conditions per place. [2024-06-21 19:08:58,935 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 616 selfloop transitions, 221 changer transitions 0/840 dead transitions. [2024-06-21 19:08:58,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 840 transitions, 19446 flow [2024-06-21 19:08:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:08:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:08:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 19:08:58,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 19:08:58,937 INFO L175 Difference]: Start difference. First operand has 472 places, 813 transitions, 16906 flow. Second operand 10 states and 176 transitions. [2024-06-21 19:08:58,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 840 transitions, 19446 flow [2024-06-21 19:09:04,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 840 transitions, 19074 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 19:09:04,129 INFO L231 Difference]: Finished difference. Result has 475 places, 817 transitions, 17076 flow [2024-06-21 19:09:04,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16540, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17076, PETRI_PLACES=475, PETRI_TRANSITIONS=817} [2024-06-21 19:09:04,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-21 19:09:04,129 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 817 transitions, 17076 flow [2024-06-21 19:09:04,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:04,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:04,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:09:04,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 19:09:04,130 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:04,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash 824265056, now seen corresponding path program 4 times [2024-06-21 19:09:04,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:04,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625252464] [2024-06-21 19:09:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:04,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:06,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:06,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625252464] [2024-06-21 19:09:06,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625252464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:06,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:06,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:09:06,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733145722] [2024-06-21 19:09:06,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:06,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:09:06,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:06,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:09:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:09:06,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:06,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 817 transitions, 17076 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:06,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:06,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:06,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:09,663 INFO L124 PetriNetUnfolderBase]: 4980/7540 cut-off events. [2024-06-21 19:09:09,663 INFO L125 PetriNetUnfolderBase]: For 1836970/1836990 co-relation queries the response was YES. [2024-06-21 19:09:09,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86756 conditions, 7540 events. 4980/7540 cut-off events. For 1836970/1836990 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42590 event pairs, 1153 based on Foata normal form. 20/7559 useless extension candidates. Maximal degree in co-relation 86517. Up to 6650 conditions per place. [2024-06-21 19:09:09,804 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 616 selfloop transitions, 225 changer transitions 0/844 dead transitions. [2024-06-21 19:09:09,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 844 transitions, 19632 flow [2024-06-21 19:09:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:09:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:09:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 19:09:09,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 19:09:09,805 INFO L175 Difference]: Start difference. First operand has 475 places, 817 transitions, 17076 flow. Second operand 10 states and 175 transitions. [2024-06-21 19:09:09,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 844 transitions, 19632 flow [2024-06-21 19:09:15,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 844 transitions, 19169 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 19:09:15,834 INFO L231 Difference]: Finished difference. Result has 478 places, 821 transitions, 17165 flow [2024-06-21 19:09:15,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16628, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17165, PETRI_PLACES=478, PETRI_TRANSITIONS=821} [2024-06-21 19:09:15,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-21 19:09:15,835 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 821 transitions, 17165 flow [2024-06-21 19:09:15,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:15,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:15,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:09:15,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 19:09:15,835 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:15,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:15,837 INFO L85 PathProgramCache]: Analyzing trace with hash 824277146, now seen corresponding path program 5 times [2024-06-21 19:09:15,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:15,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127208971] [2024-06-21 19:09:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:15,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:18,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127208971] [2024-06-21 19:09:18,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127208971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:18,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:18,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:09:18,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022265105] [2024-06-21 19:09:18,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:18,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:09:18,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:09:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:09:18,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:18,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 821 transitions, 17165 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:18,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:18,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:18,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:21,468 INFO L124 PetriNetUnfolderBase]: 4976/7535 cut-off events. [2024-06-21 19:09:21,468 INFO L125 PetriNetUnfolderBase]: For 1850679/1850699 co-relation queries the response was YES. [2024-06-21 19:09:21,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86647 conditions, 7535 events. 4976/7535 cut-off events. For 1850679/1850699 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42621 event pairs, 1153 based on Foata normal form. 20/7554 useless extension candidates. Maximal degree in co-relation 86407. Up to 6648 conditions per place. [2024-06-21 19:09:21,611 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 612 selfloop transitions, 229 changer transitions 0/844 dead transitions. [2024-06-21 19:09:21,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 844 transitions, 19633 flow [2024-06-21 19:09:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:09:21,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:09:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 19:09:21,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 19:09:21,612 INFO L175 Difference]: Start difference. First operand has 478 places, 821 transitions, 17165 flow. Second operand 10 states and 174 transitions. [2024-06-21 19:09:21,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 844 transitions, 19633 flow [2024-06-21 19:09:27,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 844 transitions, 19138 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 19:09:27,590 INFO L231 Difference]: Finished difference. Result has 481 places, 821 transitions, 17137 flow [2024-06-21 19:09:27,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16670, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17137, PETRI_PLACES=481, PETRI_TRANSITIONS=821} [2024-06-21 19:09:27,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-21 19:09:27,591 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 821 transitions, 17137 flow [2024-06-21 19:09:27,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:27,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:27,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:09:27,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 19:09:27,591 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:27,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:27,592 INFO L85 PathProgramCache]: Analyzing trace with hash 824277580, now seen corresponding path program 1 times [2024-06-21 19:09:27,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:27,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882467888] [2024-06-21 19:09:27,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:27,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:30,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:30,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882467888] [2024-06-21 19:09:30,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882467888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:30,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:30,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:09:30,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368369360] [2024-06-21 19:09:30,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:30,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:09:30,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:09:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:09:30,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:30,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 821 transitions, 17137 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:30,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:30,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:30,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:33,279 INFO L124 PetriNetUnfolderBase]: 4994/7560 cut-off events. [2024-06-21 19:09:33,279 INFO L125 PetriNetUnfolderBase]: For 1888355/1888357 co-relation queries the response was YES. [2024-06-21 19:09:33,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87255 conditions, 7560 events. 4994/7560 cut-off events. For 1888355/1888357 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42796 event pairs, 1398 based on Foata normal form. 4/7563 useless extension candidates. Maximal degree in co-relation 87014. Up to 7390 conditions per place. [2024-06-21 19:09:33,411 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 774 selfloop transitions, 76 changer transitions 0/853 dead transitions. [2024-06-21 19:09:33,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 853 transitions, 19349 flow [2024-06-21 19:09:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:09:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:09:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 19:09:33,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 19:09:33,413 INFO L175 Difference]: Start difference. First operand has 481 places, 821 transitions, 17137 flow. Second operand 10 states and 164 transitions. [2024-06-21 19:09:33,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 853 transitions, 19349 flow [2024-06-21 19:09:39,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 853 transitions, 18896 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 19:09:39,983 INFO L231 Difference]: Finished difference. Result has 484 places, 830 transitions, 17064 flow [2024-06-21 19:09:39,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16684, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17064, PETRI_PLACES=484, PETRI_TRANSITIONS=830} [2024-06-21 19:09:39,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-21 19:09:39,983 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 830 transitions, 17064 flow [2024-06-21 19:09:39,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:39,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:39,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:09:39,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 19:09:39,984 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:39,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash 824264684, now seen corresponding path program 6 times [2024-06-21 19:09:39,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:39,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071571013] [2024-06-21 19:09:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:39,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:42,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:42,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071571013] [2024-06-21 19:09:42,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071571013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:42,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:42,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:09:42,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160718240] [2024-06-21 19:09:42,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:42,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:09:42,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:42,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:09:42,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:09:42,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 19:09:42,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 830 transitions, 17064 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:42,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:42,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 19:09:42,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:45,903 INFO L124 PetriNetUnfolderBase]: 5006/7577 cut-off events. [2024-06-21 19:09:45,903 INFO L125 PetriNetUnfolderBase]: For 1917631/1917651 co-relation queries the response was YES. [2024-06-21 19:09:45,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87518 conditions, 7577 events. 5006/7577 cut-off events. For 1917631/1917651 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 42800 event pairs, 1145 based on Foata normal form. 20/7596 useless extension candidates. Maximal degree in co-relation 87275. Up to 6896 conditions per place. [2024-06-21 19:09:46,026 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 625 selfloop transitions, 224 changer transitions 0/852 dead transitions. [2024-06-21 19:09:46,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 852 transitions, 19384 flow [2024-06-21 19:09:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 19:09:46,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 19:09:46,028 INFO L175 Difference]: Start difference. First operand has 484 places, 830 transitions, 17064 flow. Second operand 9 states and 152 transitions. [2024-06-21 19:09:46,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 852 transitions, 19384 flow [2024-06-21 19:09:51,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 852 transitions, 19280 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 19:09:51,643 INFO L231 Difference]: Finished difference. Result has 490 places, 834 transitions, 17503 flow [2024-06-21 19:09:51,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16960, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17503, PETRI_PLACES=490, PETRI_TRANSITIONS=834} [2024-06-21 19:09:51,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-21 19:09:51,644 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 834 transitions, 17503 flow [2024-06-21 19:09:51,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:51,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:09:51,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:09:51,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 19:09:51,645 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:09:51,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:09:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1750931158, now seen corresponding path program 7 times [2024-06-21 19:09:51,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:09:51,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465959607] [2024-06-21 19:09:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:09:51,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:09:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:09:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:09:54,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:09:54,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465959607] [2024-06-21 19:09:54,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465959607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:09:54,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:09:54,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:09:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304366506] [2024-06-21 19:09:54,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:09:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:09:54,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:09:54,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:09:54,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:09:54,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:09:54,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 834 transitions, 17503 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:09:54,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:09:54,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:09:54,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:09:57,335 INFO L124 PetriNetUnfolderBase]: 5032/7613 cut-off events. [2024-06-21 19:09:57,335 INFO L125 PetriNetUnfolderBase]: For 1966079/1966099 co-relation queries the response was YES. [2024-06-21 19:09:57,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88957 conditions, 7613 events. 5032/7613 cut-off events. For 1966079/1966099 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43030 event pairs, 1145 based on Foata normal form. 20/7632 useless extension candidates. Maximal degree in co-relation 88711. Up to 6896 conditions per place. [2024-06-21 19:09:57,469 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 625 selfloop transitions, 233 changer transitions 0/861 dead transitions. [2024-06-21 19:09:57,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 861 transitions, 20183 flow [2024-06-21 19:09:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:09:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:09:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:09:57,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 19:09:57,470 INFO L175 Difference]: Start difference. First operand has 490 places, 834 transitions, 17503 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:09:57,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 861 transitions, 20183 flow [2024-06-21 19:10:03,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 861 transitions, 19690 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:03,618 INFO L231 Difference]: Finished difference. Result has 492 places, 842 transitions, 17663 flow [2024-06-21 19:10:03,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17010, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17663, PETRI_PLACES=492, PETRI_TRANSITIONS=842} [2024-06-21 19:10:03,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-21 19:10:03,618 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 842 transitions, 17663 flow [2024-06-21 19:10:03,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:03,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:03,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:03,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 19:10:03,619 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:03,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:03,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1750920928, now seen corresponding path program 8 times [2024-06-21 19:10:03,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:03,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582278800] [2024-06-21 19:10:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:03,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:06,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:06,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582278800] [2024-06-21 19:10:06,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582278800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:06,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:06,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944939686] [2024-06-21 19:10:06,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:06,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:06,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:06,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:06,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 842 transitions, 17663 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:06,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:06,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:06,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:09,187 INFO L124 PetriNetUnfolderBase]: 5026/7605 cut-off events. [2024-06-21 19:10:09,188 INFO L125 PetriNetUnfolderBase]: For 1982481/1982501 co-relation queries the response was YES. [2024-06-21 19:10:09,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88856 conditions, 7605 events. 5026/7605 cut-off events. For 1982481/1982501 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43002 event pairs, 1145 based on Foata normal form. 20/7624 useless extension candidates. Maximal degree in co-relation 88609. Up to 6926 conditions per place. [2024-06-21 19:10:09,317 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 633 selfloop transitions, 224 changer transitions 0/860 dead transitions. [2024-06-21 19:10:09,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 860 transitions, 19929 flow [2024-06-21 19:10:09,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 19:10:09,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 19:10:09,320 INFO L175 Difference]: Start difference. First operand has 492 places, 842 transitions, 17663 flow. Second operand 9 states and 162 transitions. [2024-06-21 19:10:09,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 860 transitions, 19929 flow [2024-06-21 19:10:14,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 860 transitions, 19548 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 19:10:14,929 INFO L231 Difference]: Finished difference. Result has 496 places, 842 transitions, 17739 flow [2024-06-21 19:10:14,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17282, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17739, PETRI_PLACES=496, PETRI_TRANSITIONS=842} [2024-06-21 19:10:14,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-21 19:10:14,930 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 842 transitions, 17739 flow [2024-06-21 19:10:14,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:14,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:14,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:14,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 19:10:14,931 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:14,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1750931468, now seen corresponding path program 6 times [2024-06-21 19:10:14,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:14,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519047611] [2024-06-21 19:10:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:17,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519047611] [2024-06-21 19:10:17,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519047611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:17,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:17,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:10:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276762720] [2024-06-21 19:10:17,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:10:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:10:17,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:10:17,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 19:10:17,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 842 transitions, 17739 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:17,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:17,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 19:10:17,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:20,840 INFO L124 PetriNetUnfolderBase]: 4937/7524 cut-off events. [2024-06-21 19:10:20,840 INFO L125 PetriNetUnfolderBase]: For 2033328/2033348 co-relation queries the response was YES. [2024-06-21 19:10:20,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89186 conditions, 7524 events. 4937/7524 cut-off events. For 2033328/2033348 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 43076 event pairs, 1093 based on Foata normal form. 22/7545 useless extension candidates. Maximal degree in co-relation 88937. Up to 6816 conditions per place. [2024-06-21 19:10:20,977 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 663 selfloop transitions, 144 changer transitions 0/862 dead transitions. [2024-06-21 19:10:20,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 862 transitions, 19470 flow [2024-06-21 19:10:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:10:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:10:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 19:10:20,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 19:10:20,978 INFO L175 Difference]: Start difference. First operand has 496 places, 842 transitions, 17739 flow. Second operand 9 states and 164 transitions. [2024-06-21 19:10:20,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 862 transitions, 19470 flow [2024-06-21 19:10:26,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 862 transitions, 18990 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 19:10:26,503 INFO L231 Difference]: Finished difference. Result has 497 places, 845 transitions, 17614 flow [2024-06-21 19:10:26,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17259, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17614, PETRI_PLACES=497, PETRI_TRANSITIONS=845} [2024-06-21 19:10:26,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-21 19:10:26,504 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 845 transitions, 17614 flow [2024-06-21 19:10:26,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:26,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:26,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:26,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 19:10:26,505 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:26,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:26,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1563733184, now seen corresponding path program 4 times [2024-06-21 19:10:26,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:26,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772703334] [2024-06-21 19:10:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:26,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:10:28,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:28,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772703334] [2024-06-21 19:10:28,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772703334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:28,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:28,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464629103] [2024-06-21 19:10:28,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:28,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:28,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:28,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:28,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 845 transitions, 17614 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:28,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:28,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:28,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:10:31,589 INFO L124 PetriNetUnfolderBase]: 4978/7605 cut-off events. [2024-06-21 19:10:31,589 INFO L125 PetriNetUnfolderBase]: For 2088077/2088077 co-relation queries the response was YES. [2024-06-21 19:10:31,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89679 conditions, 7605 events. 4978/7605 cut-off events. For 2088077/2088077 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 43923 event pairs, 1572 based on Foata normal form. 6/7610 useless extension candidates. Maximal degree in co-relation 89429. Up to 6738 conditions per place. [2024-06-21 19:10:31,914 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 673 selfloop transitions, 153 changer transitions 0/881 dead transitions. [2024-06-21 19:10:31,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 881 transitions, 19639 flow [2024-06-21 19:10:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:10:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:10:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 19:10:31,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 19:10:31,915 INFO L175 Difference]: Start difference. First operand has 497 places, 845 transitions, 17614 flow. Second operand 8 states and 148 transitions. [2024-06-21 19:10:31,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 881 transitions, 19639 flow [2024-06-21 19:10:37,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 881 transitions, 19321 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 19:10:37,403 INFO L231 Difference]: Finished difference. Result has 498 places, 856 transitions, 17862 flow [2024-06-21 19:10:37,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17296, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17862, PETRI_PLACES=498, PETRI_TRANSITIONS=856} [2024-06-21 19:10:37,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-21 19:10:37,404 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 856 transitions, 17862 flow [2024-06-21 19:10:37,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:37,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:10:37,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:10:37,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 19:10:37,405 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 19:10:37,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:10:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash -490637238, now seen corresponding path program 5 times [2024-06-21 19:10:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:10:37,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096251570] [2024-06-21 19:10:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:10:37,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:10:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:10:39,152 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 19:10:39,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:10:39,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096251570] [2024-06-21 19:10:39,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096251570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:10:39,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:10:39,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:10:39,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848810743] [2024-06-21 19:10:39,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:10:39,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:10:39,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:10:39,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:10:39,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:10:39,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 19:10:39,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 856 transitions, 17862 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:10:39,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:10:39,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 19:10:39,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand