./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:22:01,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:22:01,645 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:22:01,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:22:01,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:22:01,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:22:01,673 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:22:01,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:22:01,674 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:22:01,678 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:22:01,678 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:22:01,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:22:01,679 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:22:01,680 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:22:01,681 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:22:01,681 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:22:01,681 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:22:01,681 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:22:01,682 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:22:01,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:22:01,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:22:01,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:22:01,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:22:01,684 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:22:01,684 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:22:01,685 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:22:01,685 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:22:01,685 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:22:01,686 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:22:01,686 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:22:01,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:22:01,687 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:22:01,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:22:01,688 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:22:01,688 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:22:01,688 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:22:01,688 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:22:01,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:22:01,689 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:22:01,689 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:22:01,689 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:22:01,689 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:22:01,690 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:22:01,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:22:01,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:22:01,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:22:01,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:22:01,973 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:22:01,973 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:22:01,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-27 20:22:03,201 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:22:03,450 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:22:03,451 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_pso.opt_tso.opt.i [2024-06-27 20:22:03,469 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d99a30174/be2a041bcace4a9cb7a2cdb9c15c5461/FLAGaf6f345ed [2024-06-27 20:22:03,481 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d99a30174/be2a041bcace4a9cb7a2cdb9c15c5461 [2024-06-27 20:22:03,483 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:22:03,484 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:22:03,484 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix035_pso.opt_tso.opt.yml/witness.yml [2024-06-27 20:22:03,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:22:03,699 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:22:03,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:22:03,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:22:03,705 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:22:03,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:22:03" (1/2) ... [2024-06-27 20:22:03,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198ef9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:22:03, skipping insertion in model container [2024-06-27 20:22:03,706 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:22:03" (1/2) ... [2024-06-27 20:22:03,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@18af882d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:22:03, skipping insertion in model container [2024-06-27 20:22:03,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:22:03" (2/2) ... [2024-06-27 20:22:03,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198ef9f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:03, skipping insertion in model container [2024-06-27 20:22:03,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:22:03" (2/2) ... [2024-06-27 20:22:03,709 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:22:03,815 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:22:03,817 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 20:22:03,817 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 20:22:03,817 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-27 20:22:03,818 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:22:03,818 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-27 20:22:03,861 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:22:04,258 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:22:04,269 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:22:04,414 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:22:04,486 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:22:04,486 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04 WrapperNode [2024-06-27 20:22:04,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:22:04,487 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:22:04,487 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:22:04,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:22:04,494 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 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,521 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 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,549 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 134 [2024-06-27 20:22:04,549 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:22:04,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:22:04,550 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:22:04,550 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:22:04,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,564 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,580 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]. [2024-06-27 20:22:04,580 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,581 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,591 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,593 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,595 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,596 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:22:04,600 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:22:04,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:22:04,601 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:22:04,602 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (1/1) ... [2024-06-27 20:22:04,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:22:04,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:22:04,627 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) [2024-06-27 20:22:04,646 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 [2024-06-27 20:22:04,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:22:04,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:22:04,674 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:22:04,675 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:22:04,675 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:22:04,675 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:22:04,675 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:22:04,675 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:22:04,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:22:04,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:22:04,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:22:04,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:22:04,677 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:22:04,785 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:22:04,787 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:22:05,168 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:22:05,169 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:22:05,343 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:22:05,343 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:22:05,344 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:22:05 BoogieIcfgContainer [2024-06-27 20:22:05,345 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:22:05,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:22:05,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:22:05,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:22:05,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:22:03" (1/4) ... [2024-06-27 20:22:05,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125fa6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:22:05, skipping insertion in model container [2024-06-27 20:22:05,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:22:03" (2/4) ... [2024-06-27 20:22:05,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125fa6a7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:22:05, skipping insertion in model container [2024-06-27 20:22:05,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:22:04" (3/4) ... [2024-06-27 20:22:05,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125fa6a7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:22:05, skipping insertion in model container [2024-06-27 20:22:05,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:22:05" (4/4) ... [2024-06-27 20:22:05,355 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_pso.opt_tso.opt.i [2024-06-27 20:22:05,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:22:05,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:22:05,371 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:22:05,416 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:22:05,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:22:05,483 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:22:05,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:22:05,486 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 65 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. [2024-06-27 20:22:05,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:22:05,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:22:05,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:22:05,519 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;@4031ae45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:22:05,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:22:05,525 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:22:05,526 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:22:05,526 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:22:05,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:05,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:22:05,527 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)] === [2024-06-27 20:22:05,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:05,533 INFO L85 PathProgramCache]: Analyzing trace with hash 363378819, now seen corresponding path program 1 times [2024-06-27 20:22:05,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:05,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551302531] [2024-06-27 20:22:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:05,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:06,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:06,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551302531] [2024-06-27 20:22:06,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551302531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:06,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:06,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:22:06,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568046418] [2024-06-27 20:22:06,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:06,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:22:06,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:06,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:22:06,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:22:06,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-27 20:22:06,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:06,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:06,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-27 20:22:06,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:06,967 INFO L124 PetriNetUnfolderBase]: 869/1427 cut-off events. [2024-06-27 20:22:06,968 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 20:22:06,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2805 conditions, 1427 events. 869/1427 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7301 event pairs, 566 based on Foata normal form. 1/1369 useless extension candidates. Maximal degree in co-relation 2793. Up to 1315 conditions per place. [2024-06-27 20:22:06,984 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 20:22:06,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-27 20:22:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:22:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:22:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-27 20:22:06,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 20:22:06,997 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 82 transitions. [2024-06-27 20:22:06,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-27 20:22:07,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:07,003 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:22:07,005 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} [2024-06-27 20:22:07,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:22:07,008 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:22:07,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:07,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:07,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:07,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:22:07,009 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)] === [2024-06-27 20:22:07,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:07,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1314823706, now seen corresponding path program 1 times [2024-06-27 20:22:07,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:07,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325541835] [2024-06-27 20:22:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:07,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:07,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:07,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325541835] [2024-06-27 20:22:07,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325541835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:07,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:07,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:22:07,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187574062] [2024-06-27 20:22:07,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:07,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:22:07,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:07,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:22:07,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:22:07,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 20:22:07,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-06-27 20:22:07,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:07,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 20:22:07,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:08,022 INFO L124 PetriNetUnfolderBase]: 996/1581 cut-off events. [2024-06-27 20:22:08,023 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-06-27 20:22:08,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1581 events. 996/1581 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8009 event pairs, 519 based on Foata normal form. 3/1556 useless extension candidates. Maximal degree in co-relation 3584. Up to 1484 conditions per place. [2024-06-27 20:22:08,033 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 20:22:08,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-27 20:22:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:22:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:22:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-27 20:22:08,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 20:22:08,035 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 104 transitions. [2024-06-27 20:22:08,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-27 20:22:08,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:22:08,038 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:22:08,038 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} [2024-06-27 20:22:08,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:22:08,039 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:22:08,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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) [2024-06-27 20:22:08,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:08,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:08,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:22:08,040 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)] === [2024-06-27 20:22:08,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash -188208607, now seen corresponding path program 1 times [2024-06-27 20:22:08,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:08,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046913313] [2024-06-27 20:22:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:08,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:09,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046913313] [2024-06-27 20:22:09,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046913313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:09,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:09,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:22:09,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013960940] [2024-06-27 20:22:09,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:09,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:22:09,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:09,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:22:09,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:22:09,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 20:22:09,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-27 20:22:09,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:09,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 20:22:09,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:09,482 INFO L124 PetriNetUnfolderBase]: 1265/1973 cut-off events. [2024-06-27 20:22:09,483 INFO L125 PetriNetUnfolderBase]: For 1076/1076 co-relation queries the response was YES. [2024-06-27 20:22:09,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4970 conditions, 1973 events. 1265/1973 cut-off events. For 1076/1076 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9692 event pairs, 445 based on Foata normal form. 6/1942 useless extension candidates. Maximal degree in co-relation 4956. Up to 1828 conditions per place. [2024-06-27 20:22:09,496 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-27 20:22:09,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 350 flow [2024-06-27 20:22:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:22:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:22:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 20:22:09,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-27 20:22:09,500 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 143 transitions. [2024-06-27 20:22:09,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 350 flow [2024-06-27 20:22:09,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 330 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 20:22:09,503 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-27 20:22:09,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 20:22:09,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-27 20:22:09,504 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-27 20:22:09,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-27 20:22:09,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:09,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:09,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:22:09,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:09,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:09,505 INFO L85 PathProgramCache]: Analyzing trace with hash 632564042, now seen corresponding path program 1 times [2024-06-27 20:22:09,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:09,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515033312] [2024-06-27 20:22:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:09,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:10,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:10,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515033312] [2024-06-27 20:22:10,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515033312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:10,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:10,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:22:10,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834201978] [2024-06-27 20:22:10,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:10,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:22:10,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:22:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:22:10,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:22:10,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:10,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:10,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:22:10,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:10,722 INFO L124 PetriNetUnfolderBase]: 1085/1810 cut-off events. [2024-06-27 20:22:10,723 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-27 20:22:10,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4867 conditions, 1810 events. 1085/1810 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9352 event pairs, 442 based on Foata normal form. 4/1805 useless extension candidates. Maximal degree in co-relation 4850. Up to 1611 conditions per place. [2024-06-27 20:22:10,735 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-27 20:22:10,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 327 flow [2024-06-27 20:22:10,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:22:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:22:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-27 20:22:10,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:22:10,737 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 105 transitions. [2024-06-27 20:22:10,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 327 flow [2024-06-27 20:22:10,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 300 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:10,742 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-27 20:22:10,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 20:22:10,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-27 20:22:10,743 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-27 20:22:10,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:10,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:10,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:10,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:22:10,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:10,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1669713967, now seen corresponding path program 1 times [2024-06-27 20:22:10,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:10,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945449003] [2024-06-27 20:22:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:10,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:11,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:11,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945449003] [2024-06-27 20:22:11,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945449003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:11,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:11,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:22:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394084101] [2024-06-27 20:22:11,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:11,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:22:11,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:22:11,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:22:11,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:11,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 20:22:11,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:11,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:11,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:12,203 INFO L124 PetriNetUnfolderBase]: 1277/2017 cut-off events. [2024-06-27 20:22:12,203 INFO L125 PetriNetUnfolderBase]: For 3038/3038 co-relation queries the response was YES. [2024-06-27 20:22:12,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5997 conditions, 2017 events. 1277/2017 cut-off events. For 3038/3038 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9971 event pairs, 487 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 5978. Up to 1826 conditions per place. [2024-06-27 20:22:12,218 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-27 20:22:12,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 444 flow [2024-06-27 20:22:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:22:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:22:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 20:22:12,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-27 20:22:12,220 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 128 transitions. [2024-06-27 20:22:12,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 444 flow [2024-06-27 20:22:12,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 424 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:12,224 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-27 20:22:12,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-27 20:22:12,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-27 20:22:12,225 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-27 20:22:12,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 20:22:12,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:12,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:12,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:22:12,226 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)] === [2024-06-27 20:22:12,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:12,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1699414447, now seen corresponding path program 2 times [2024-06-27 20:22:12,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:12,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275487885] [2024-06-27 20:22:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:12,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:12,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275487885] [2024-06-27 20:22:12,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275487885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:12,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:12,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:22:12,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754229106] [2024-06-27 20:22:12,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:12,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:22:12,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:12,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:22:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:22:13,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:13,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 20:22:13,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:13,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:13,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:13,623 INFO L124 PetriNetUnfolderBase]: 1267/2005 cut-off events. [2024-06-27 20:22:13,623 INFO L125 PetriNetUnfolderBase]: For 4386/4392 co-relation queries the response was YES. [2024-06-27 20:22:13,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6437 conditions, 2005 events. 1267/2005 cut-off events. For 4386/4392 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9962 event pairs, 486 based on Foata normal form. 8/2000 useless extension candidates. Maximal degree in co-relation 6417. Up to 1818 conditions per place. [2024-06-27 20:22:13,637 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 47 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-27 20:22:13,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 428 flow [2024-06-27 20:22:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:22:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:22:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 20:22:13,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 20:22:13,639 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 122 transitions. [2024-06-27 20:22:13,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 428 flow [2024-06-27 20:22:13,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 398 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 20:22:13,646 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-27 20:22:13,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-27 20:22:13,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 20:22:13,649 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-27 20:22:13,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 20:22:13,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:13,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:13,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:22:13,650 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)] === [2024-06-27 20:22:13,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:13,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1299949913, now seen corresponding path program 1 times [2024-06-27 20:22:13,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:13,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196929482] [2024-06-27 20:22:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:13,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:14,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196929482] [2024-06-27 20:22:14,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196929482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:14,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:14,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:14,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479698852] [2024-06-27 20:22:14,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:14,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:14,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:14,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:14,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:14,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:14,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-27 20:22:14,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:14,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:14,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:15,102 INFO L124 PetriNetUnfolderBase]: 1325/2104 cut-off events. [2024-06-27 20:22:15,102 INFO L125 PetriNetUnfolderBase]: For 5380/5382 co-relation queries the response was YES. [2024-06-27 20:22:15,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6898 conditions, 2104 events. 1325/2104 cut-off events. For 5380/5382 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10492 event pairs, 520 based on Foata normal form. 6/2099 useless extension candidates. Maximal degree in co-relation 6876. Up to 1909 conditions per place. [2024-06-27 20:22:15,120 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 63 selfloop transitions, 24 changer transitions 0/93 dead transitions. [2024-06-27 20:22:15,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 93 transitions, 598 flow [2024-06-27 20:22:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:22:15,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 20:22:15,122 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:22:15,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 93 transitions, 598 flow [2024-06-27 20:22:15,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 93 transitions, 542 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:15,128 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 380 flow [2024-06-27 20:22:15,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=380, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2024-06-27 20:22:15,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-27 20:22:15,130 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 380 flow [2024-06-27 20:22:15,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-27 20:22:15,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:15,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:15,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:22:15,131 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)] === [2024-06-27 20:22:15,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:15,132 INFO L85 PathProgramCache]: Analyzing trace with hash 803841967, now seen corresponding path program 2 times [2024-06-27 20:22:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:15,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403999452] [2024-06-27 20:22:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:15,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:15,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403999452] [2024-06-27 20:22:15,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403999452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:15,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:15,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:15,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096847377] [2024-06-27 20:22:15,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:15,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:15,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:15,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:15,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:16,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:16,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 380 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-27 20:22:16,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:16,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:16,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:16,642 INFO L124 PetriNetUnfolderBase]: 1347/2142 cut-off events. [2024-06-27 20:22:16,642 INFO L125 PetriNetUnfolderBase]: For 7287/7291 co-relation queries the response was YES. [2024-06-27 20:22:16,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7563 conditions, 2142 events. 1347/2142 cut-off events. For 7287/7291 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10731 event pairs, 513 based on Foata normal form. 8/2134 useless extension candidates. Maximal degree in co-relation 7539. Up to 1918 conditions per place. [2024-06-27 20:22:16,666 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-27 20:22:16,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 95 transitions, 670 flow [2024-06-27 20:22:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 20:22:16,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-27 20:22:16,670 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 380 flow. Second operand 7 states and 143 transitions. [2024-06-27 20:22:16,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 95 transitions, 670 flow [2024-06-27 20:22:16,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 95 transitions, 630 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:16,681 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 439 flow [2024-06-27 20:22:16,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-27 20:22:16,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-27 20:22:16,684 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 439 flow [2024-06-27 20:22:16,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-27 20:22:16,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:16,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:16,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:22:16,685 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)] === [2024-06-27 20:22:16,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash 878292687, now seen corresponding path program 3 times [2024-06-27 20:22:16,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:16,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022741225] [2024-06-27 20:22:16,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:16,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:17,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:17,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022741225] [2024-06-27 20:22:17,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022741225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:17,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:17,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:17,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507535828] [2024-06-27 20:22:17,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:17,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:17,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:17,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:17,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:17,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-27 20:22:17,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:17,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:17,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:18,314 INFO L124 PetriNetUnfolderBase]: 1369/2188 cut-off events. [2024-06-27 20:22:18,314 INFO L125 PetriNetUnfolderBase]: For 9800/9802 co-relation queries the response was YES. [2024-06-27 20:22:18,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8229 conditions, 2188 events. 1369/2188 cut-off events. For 9800/9802 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11052 event pairs, 449 based on Foata normal form. 4/2176 useless extension candidates. Maximal degree in co-relation 8204. Up to 1834 conditions per place. [2024-06-27 20:22:18,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 37 changer transitions 0/102 dead transitions. [2024-06-27 20:22:18,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 807 flow [2024-06-27 20:22:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-27 20:22:18,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2024-06-27 20:22:18,333 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 439 flow. Second operand 7 states and 149 transitions. [2024-06-27 20:22:18,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 807 flow [2024-06-27 20:22:18,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 102 transitions, 722 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:18,345 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 514 flow [2024-06-27 20:22:18,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-27 20:22:18,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-27 20:22:18,346 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 514 flow [2024-06-27 20:22:18,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-27 20:22:18,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:18,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:22:18,347 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)] === [2024-06-27 20:22:18,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash -662169885, now seen corresponding path program 4 times [2024-06-27 20:22:18,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:18,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127042432] [2024-06-27 20:22:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:18,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:19,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:19,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127042432] [2024-06-27 20:22:19,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127042432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:19,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:19,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:19,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348646885] [2024-06-27 20:22:19,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:19,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:19,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:19,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:19,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:19,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 514 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-27 20:22:19,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:19,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:19,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:19,745 INFO L124 PetriNetUnfolderBase]: 1359/2175 cut-off events. [2024-06-27 20:22:19,746 INFO L125 PetriNetUnfolderBase]: For 9920/9922 co-relation queries the response was YES. [2024-06-27 20:22:19,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8159 conditions, 2175 events. 1359/2175 cut-off events. For 9920/9922 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10956 event pairs, 456 based on Foata normal form. 4/2156 useless extension candidates. Maximal degree in co-relation 8133. Up to 1826 conditions per place. [2024-06-27 20:22:19,756 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 54 selfloop transitions, 37 changer transitions 0/97 dead transitions. [2024-06-27 20:22:19,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 97 transitions, 760 flow [2024-06-27 20:22:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 20:22:19,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-27 20:22:19,757 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 514 flow. Second operand 7 states and 143 transitions. [2024-06-27 20:22:19,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 97 transitions, 760 flow [2024-06-27 20:22:19,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 702 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:19,767 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 538 flow [2024-06-27 20:22:19,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 20:22:19,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 20:22:19,768 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 538 flow [2024-06-27 20:22:19,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-27 20:22:19,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:19,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:19,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:22:19,769 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:19,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:19,770 INFO L85 PathProgramCache]: Analyzing trace with hash 981339721, now seen corresponding path program 1 times [2024-06-27 20:22:19,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:19,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626049254] [2024-06-27 20:22:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:19,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:20,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:20,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626049254] [2024-06-27 20:22:20,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626049254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:20,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:20,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:20,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986537197] [2024-06-27 20:22:20,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:20,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:20,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:22:20,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 538 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 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) [2024-06-27 20:22:20,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:20,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:22:20,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:21,358 INFO L124 PetriNetUnfolderBase]: 1181/1978 cut-off events. [2024-06-27 20:22:21,358 INFO L125 PetriNetUnfolderBase]: For 9790/9792 co-relation queries the response was YES. [2024-06-27 20:22:21,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7491 conditions, 1978 events. 1181/1978 cut-off events. For 9790/9792 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 10247 event pairs, 401 based on Foata normal form. 4/1967 useless extension candidates. Maximal degree in co-relation 7463. Up to 1735 conditions per place. [2024-06-27 20:22:21,370 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 80 selfloop transitions, 13 changer transitions 0/100 dead transitions. [2024-06-27 20:22:21,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 825 flow [2024-06-27 20:22:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:22:21,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 20:22:21,372 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 538 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:22:21,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 825 flow [2024-06-27 20:22:21,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 722 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:21,382 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 519 flow [2024-06-27 20:22:21,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=519, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-27 20:22:21,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-27 20:22:21,383 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 519 flow [2024-06-27 20:22:21,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 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) [2024-06-27 20:22:21,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:21,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:21,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:22:21,384 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:21,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:21,385 INFO L85 PathProgramCache]: Analyzing trace with hash -175741657, now seen corresponding path program 1 times [2024-06-27 20:22:21,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:21,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298148870] [2024-06-27 20:22:21,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:21,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:22,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:22,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298148870] [2024-06-27 20:22:22,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298148870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:22,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:22,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:22:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701034708] [2024-06-27 20:22:22,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:22,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:22:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:22:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:22:22,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 20:22:22,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 519 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:22,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:22,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 20:22:22,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:22,486 INFO L124 PetriNetUnfolderBase]: 1070/1845 cut-off events. [2024-06-27 20:22:22,487 INFO L125 PetriNetUnfolderBase]: For 10597/10607 co-relation queries the response was YES. [2024-06-27 20:22:22,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7289 conditions, 1845 events. 1070/1845 cut-off events. For 10597/10607 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9894 event pairs, 401 based on Foata normal form. 9/1830 useless extension candidates. Maximal degree in co-relation 7259. Up to 1605 conditions per place. [2024-06-27 20:22:22,499 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-06-27 20:22:22,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 91 transitions, 719 flow [2024-06-27 20:22:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:22:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:22:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-27 20:22:22,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-27 20:22:22,501 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 519 flow. Second operand 5 states and 104 transitions. [2024-06-27 20:22:22,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 91 transitions, 719 flow [2024-06-27 20:22:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 680 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:22,514 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 526 flow [2024-06-27 20:22:22,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=526, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-06-27 20:22:22,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-27 20:22:22,515 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 526 flow [2024-06-27 20:22:22,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:22,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:22,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:22,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:22:22,516 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:22,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1182515531, now seen corresponding path program 1 times [2024-06-27 20:22:22,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:22,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230220840] [2024-06-27 20:22:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:22,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:23,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230220840] [2024-06-27 20:22:23,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230220840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:23,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:23,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:22:23,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576799403] [2024-06-27 20:22:23,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:23,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:22:23,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:22:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:22:23,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:22:23,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 526 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:23,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:23,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:22:23,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:23,811 INFO L124 PetriNetUnfolderBase]: 1222/2021 cut-off events. [2024-06-27 20:22:23,812 INFO L125 PetriNetUnfolderBase]: For 14291/14301 co-relation queries the response was YES. [2024-06-27 20:22:23,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8476 conditions, 2021 events. 1222/2021 cut-off events. For 14291/14301 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10560 event pairs, 473 based on Foata normal form. 9/2019 useless extension candidates. Maximal degree in co-relation 8445. Up to 1828 conditions per place. [2024-06-27 20:22:23,828 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 73 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-06-27 20:22:23,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 742 flow [2024-06-27 20:22:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:22:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:22:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:22:23,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 20:22:23,830 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 526 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:22:23,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 742 flow [2024-06-27 20:22:23,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 718 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:23,845 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 558 flow [2024-06-27 20:22:23,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=558, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2024-06-27 20:22:23,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-27 20:22:23,847 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 558 flow [2024-06-27 20:22:23,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:23,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:23,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:23,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:22:23,848 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)] === [2024-06-27 20:22:23,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:23,848 INFO L85 PathProgramCache]: Analyzing trace with hash -604790994, now seen corresponding path program 1 times [2024-06-27 20:22:23,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:23,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914711929] [2024-06-27 20:22:23,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:23,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:24,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:24,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914711929] [2024-06-27 20:22:24,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914711929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:24,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:24,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:24,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606216600] [2024-06-27 20:22:24,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:24,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:24,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:25,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:25,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 558 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:25,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:25,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:25,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:25,868 INFO L124 PetriNetUnfolderBase]: 1569/2503 cut-off events. [2024-06-27 20:22:25,868 INFO L125 PetriNetUnfolderBase]: For 23001/23005 co-relation queries the response was YES. [2024-06-27 20:22:25,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11273 conditions, 2503 events. 1569/2503 cut-off events. For 23001/23005 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13005 event pairs, 425 based on Foata normal form. 20/2521 useless extension candidates. Maximal degree in co-relation 11241. Up to 1936 conditions per place. [2024-06-27 20:22:25,884 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 30 changer transitions 0/133 dead transitions. [2024-06-27 20:22:25,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1048 flow [2024-06-27 20:22:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 20:22:25,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-27 20:22:25,886 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 558 flow. Second operand 9 states and 187 transitions. [2024-06-27 20:22:25,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1048 flow [2024-06-27 20:22:25,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 1014 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:25,910 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 628 flow [2024-06-27 20:22:25,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=628, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-27 20:22:25,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-27 20:22:25,912 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 628 flow [2024-06-27 20:22:25,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:25,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:25,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:25,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:22:25,913 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)] === [2024-06-27 20:22:25,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:25,914 INFO L85 PathProgramCache]: Analyzing trace with hash -601934034, now seen corresponding path program 2 times [2024-06-27 20:22:25,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:25,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260003190] [2024-06-27 20:22:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:25,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:26,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:26,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260003190] [2024-06-27 20:22:26,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260003190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:26,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:26,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:26,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180907306] [2024-06-27 20:22:26,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:26,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:26,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:27,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:27,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 628 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:27,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:27,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:27,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:27,811 INFO L124 PetriNetUnfolderBase]: 1533/2443 cut-off events. [2024-06-27 20:22:27,811 INFO L125 PetriNetUnfolderBase]: For 24915/24919 co-relation queries the response was YES. [2024-06-27 20:22:27,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11206 conditions, 2443 events. 1533/2443 cut-off events. For 24915/24919 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12561 event pairs, 529 based on Foata normal form. 24/2465 useless extension candidates. Maximal degree in co-relation 11173. Up to 2060 conditions per place. [2024-06-27 20:22:27,830 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-27 20:22:27,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 123 transitions, 984 flow [2024-06-27 20:22:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:22:27,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 20:22:27,833 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 628 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:22:27,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 123 transitions, 984 flow [2024-06-27 20:22:27,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 939 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:27,861 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 646 flow [2024-06-27 20:22:27,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=646, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-27 20:22:27,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 20:22:27,862 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 646 flow [2024-06-27 20:22:27,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:27,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:27,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:27,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:22:27,863 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:27,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2069236146, now seen corresponding path program 3 times [2024-06-27 20:22:27,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:27,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616397662] [2024-06-27 20:22:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:27,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:28,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:28,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616397662] [2024-06-27 20:22:28,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616397662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:28,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:28,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:28,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466775195] [2024-06-27 20:22:28,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:28,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:28,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:28,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:28,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 646 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:28,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:28,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:28,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:29,654 INFO L124 PetriNetUnfolderBase]: 1608/2574 cut-off events. [2024-06-27 20:22:29,654 INFO L125 PetriNetUnfolderBase]: For 28467/28472 co-relation queries the response was YES. [2024-06-27 20:22:29,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11972 conditions, 2574 events. 1608/2574 cut-off events. For 28467/28472 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13513 event pairs, 493 based on Foata normal form. 20/2590 useless extension candidates. Maximal degree in co-relation 11937. Up to 2090 conditions per place. [2024-06-27 20:22:29,673 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 75 selfloop transitions, 40 changer transitions 0/122 dead transitions. [2024-06-27 20:22:29,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 122 transitions, 1010 flow [2024-06-27 20:22:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 20:22:29,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:22:29,675 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 646 flow. Second operand 8 states and 168 transitions. [2024-06-27 20:22:29,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 122 transitions, 1010 flow [2024-06-27 20:22:29,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 122 transitions, 949 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:22:29,702 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 694 flow [2024-06-27 20:22:29,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=694, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2024-06-27 20:22:29,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-27 20:22:29,703 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 694 flow [2024-06-27 20:22:29,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:29,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:29,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:29,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:22:29,703 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)] === [2024-06-27 20:22:29,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:29,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2069051448, now seen corresponding path program 1 times [2024-06-27 20:22:29,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:29,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581633426] [2024-06-27 20:22:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:29,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:30,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:30,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581633426] [2024-06-27 20:22:30,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581633426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:30,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:30,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:30,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557618664] [2024-06-27 20:22:30,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:30,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:30,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:30,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:30,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:30,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 694 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:30,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:30,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:30,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:31,547 INFO L124 PetriNetUnfolderBase]: 1625/2598 cut-off events. [2024-06-27 20:22:31,547 INFO L125 PetriNetUnfolderBase]: For 30681/30688 co-relation queries the response was YES. [2024-06-27 20:22:31,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12359 conditions, 2598 events. 1625/2598 cut-off events. For 30681/30688 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13646 event pairs, 504 based on Foata normal form. 8/2602 useless extension candidates. Maximal degree in co-relation 12323. Up to 2337 conditions per place. [2024-06-27 20:22:31,564 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2024-06-27 20:22:31,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 123 transitions, 1067 flow [2024-06-27 20:22:31,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:22:31,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 20:22:31,566 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 694 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:22:31,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 123 transitions, 1067 flow [2024-06-27 20:22:31,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 123 transitions, 978 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:31,599 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 722 flow [2024-06-27 20:22:31,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=722, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2024-06-27 20:22:31,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 20:22:31,600 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 722 flow [2024-06-27 20:22:31,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:31,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:31,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:31,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:22:31,601 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:31,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1724891700, now seen corresponding path program 1 times [2024-06-27 20:22:31,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:31,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860959669] [2024-06-27 20:22:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:31,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:32,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:32,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860959669] [2024-06-27 20:22:32,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860959669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:32,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:32,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:22:32,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488802663] [2024-06-27 20:22:32,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:32,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:22:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:22:32,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:22:32,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:22:32,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 722 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:32,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:32,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:22:32,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:32,882 INFO L124 PetriNetUnfolderBase]: 1546/2512 cut-off events. [2024-06-27 20:22:32,883 INFO L125 PetriNetUnfolderBase]: For 33009/33019 co-relation queries the response was YES. [2024-06-27 20:22:32,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12343 conditions, 2512 events. 1546/2512 cut-off events. For 33009/33019 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13459 event pairs, 512 based on Foata normal form. 10/2509 useless extension candidates. Maximal degree in co-relation 12305. Up to 2240 conditions per place. [2024-06-27 20:22:32,897 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 76 selfloop transitions, 21 changer transitions 0/111 dead transitions. [2024-06-27 20:22:32,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 111 transitions, 982 flow [2024-06-27 20:22:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:22:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:22:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 20:22:32,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 20:22:32,899 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 722 flow. Second operand 6 states and 122 transitions. [2024-06-27 20:22:32,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 111 transitions, 982 flow [2024-06-27 20:22:32,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 911 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:32,935 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 733 flow [2024-06-27 20:22:32,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=733, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2024-06-27 20:22:32,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-27 20:22:32,936 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 733 flow [2024-06-27 20:22:32,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:32,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:32,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:32,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:22:32,937 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)] === [2024-06-27 20:22:32,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:32,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2061943984, now seen corresponding path program 4 times [2024-06-27 20:22:32,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:32,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121830718] [2024-06-27 20:22:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:33,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:33,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121830718] [2024-06-27 20:22:33,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121830718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:33,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:33,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703716242] [2024-06-27 20:22:33,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:33,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:33,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:33,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 733 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:33,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:33,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:33,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:34,625 INFO L124 PetriNetUnfolderBase]: 1690/2695 cut-off events. [2024-06-27 20:22:34,625 INFO L125 PetriNetUnfolderBase]: For 38438/38440 co-relation queries the response was YES. [2024-06-27 20:22:34,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13416 conditions, 2695 events. 1690/2695 cut-off events. For 38438/38440 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14058 event pairs, 508 based on Foata normal form. 20/2703 useless extension candidates. Maximal degree in co-relation 13377. Up to 2208 conditions per place. [2024-06-27 20:22:34,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 41 changer transitions 0/129 dead transitions. [2024-06-27 20:22:34,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 129 transitions, 1119 flow [2024-06-27 20:22:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:22:34,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 20:22:34,645 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 733 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:22:34,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 129 transitions, 1119 flow [2024-06-27 20:22:34,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 1067 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:34,670 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 796 flow [2024-06-27 20:22:34,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=796, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2024-06-27 20:22:34,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 20:22:34,671 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 796 flow [2024-06-27 20:22:34,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:34,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:34,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:34,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:22:34,672 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)] === [2024-06-27 20:22:34,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1833858136, now seen corresponding path program 2 times [2024-06-27 20:22:34,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:34,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679494257] [2024-06-27 20:22:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:34,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:35,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:35,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679494257] [2024-06-27 20:22:35,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679494257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:35,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:35,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:35,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823330317] [2024-06-27 20:22:35,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:35,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:35,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:35,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:35,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:35,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 796 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:35,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:35,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:35,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:36,511 INFO L124 PetriNetUnfolderBase]: 1718/2756 cut-off events. [2024-06-27 20:22:36,511 INFO L125 PetriNetUnfolderBase]: For 40741/40753 co-relation queries the response was YES. [2024-06-27 20:22:36,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13984 conditions, 2756 events. 1718/2756 cut-off events. For 40741/40753 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14582 event pairs, 533 based on Foata normal form. 12/2762 useless extension candidates. Maximal degree in co-relation 13944. Up to 2467 conditions per place. [2024-06-27 20:22:36,524 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 93 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-27 20:22:36,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 132 transitions, 1210 flow [2024-06-27 20:22:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:22:36,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 20:22:36,525 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 796 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:22:36,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 132 transitions, 1210 flow [2024-06-27 20:22:36,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 132 transitions, 1109 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:36,558 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 863 flow [2024-06-27 20:22:36,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=863, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2024-06-27 20:22:36,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-27 20:22:36,559 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 863 flow [2024-06-27 20:22:36,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:36,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:36,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:36,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:22:36,560 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:36,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:36,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1825287256, now seen corresponding path program 3 times [2024-06-27 20:22:36,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:36,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275818876] [2024-06-27 20:22:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:36,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:37,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275818876] [2024-06-27 20:22:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275818876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:37,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764864727] [2024-06-27 20:22:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:37,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:37,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:37,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 863 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:37,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:37,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:37,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:38,217 INFO L124 PetriNetUnfolderBase]: 1735/2783 cut-off events. [2024-06-27 20:22:38,217 INFO L125 PetriNetUnfolderBase]: For 44284/44296 co-relation queries the response was YES. [2024-06-27 20:22:38,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14458 conditions, 2783 events. 1735/2783 cut-off events. For 44284/44296 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14735 event pairs, 479 based on Foata normal form. 12/2789 useless extension candidates. Maximal degree in co-relation 14416. Up to 2411 conditions per place. [2024-06-27 20:22:38,233 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 93 selfloop transitions, 39 changer transitions 0/139 dead transitions. [2024-06-27 20:22:38,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 139 transitions, 1359 flow [2024-06-27 20:22:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:22:38,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:22:38,236 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 863 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:22:38,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 139 transitions, 1359 flow [2024-06-27 20:22:38,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1293 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:38,279 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 958 flow [2024-06-27 20:22:38,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=958, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2024-06-27 20:22:38,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-27 20:22:38,280 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 958 flow [2024-06-27 20:22:38,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:38,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:38,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:38,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:22:38,281 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)] === [2024-06-27 20:22:38,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:38,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2061759286, now seen corresponding path program 4 times [2024-06-27 20:22:38,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:38,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744313952] [2024-06-27 20:22:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:38,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:39,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744313952] [2024-06-27 20:22:39,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744313952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:39,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:39,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:22:39,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151978443] [2024-06-27 20:22:39,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:39,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:22:39,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:39,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:22:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:22:39,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:39,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 958 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:39,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:39,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:39,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:40,191 INFO L124 PetriNetUnfolderBase]: 1727/2781 cut-off events. [2024-06-27 20:22:40,192 INFO L125 PetriNetUnfolderBase]: For 47030/47042 co-relation queries the response was YES. [2024-06-27 20:22:40,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14364 conditions, 2781 events. 1727/2781 cut-off events. For 47030/47042 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14801 event pairs, 541 based on Foata normal form. 12/2787 useless extension candidates. Maximal degree in co-relation 14321. Up to 2482 conditions per place. [2024-06-27 20:22:40,207 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 31 changer transitions 0/136 dead transitions. [2024-06-27 20:22:40,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 136 transitions, 1300 flow [2024-06-27 20:22:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:22:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:22:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:22:40,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:22:40,209 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 958 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:22:40,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 136 transitions, 1300 flow [2024-06-27 20:22:40,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 136 transitions, 1210 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:40,250 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 937 flow [2024-06-27 20:22:40,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=937, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2024-06-27 20:22:40,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 20:22:40,251 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 937 flow [2024-06-27 20:22:40,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:40,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:40,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:40,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:22:40,251 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)] === [2024-06-27 20:22:40,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1996711976, now seen corresponding path program 2 times [2024-06-27 20:22:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:40,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950800945] [2024-06-27 20:22:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:40,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950800945] [2024-06-27 20:22:41,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950800945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:41,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:41,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:22:41,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157176019] [2024-06-27 20:22:41,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:41,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:22:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:22:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:22:41,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:22:41,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 937 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:41,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:41,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:22:41,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:41,626 INFO L124 PetriNetUnfolderBase]: 1610/2644 cut-off events. [2024-06-27 20:22:41,626 INFO L125 PetriNetUnfolderBase]: For 49812/49820 co-relation queries the response was YES. [2024-06-27 20:22:41,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13802 conditions, 2644 events. 1610/2644 cut-off events. For 49812/49820 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14495 event pairs, 535 based on Foata normal form. 7/2623 useless extension candidates. Maximal degree in co-relation 13757. Up to 2329 conditions per place. [2024-06-27 20:22:41,642 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 77 selfloop transitions, 26 changer transitions 0/122 dead transitions. [2024-06-27 20:22:41,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 122 transitions, 1199 flow [2024-06-27 20:22:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:22:41,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:22:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 20:22:41,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 20:22:41,644 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 937 flow. Second operand 6 states and 118 transitions. [2024-06-27 20:22:41,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 122 transitions, 1199 flow [2024-06-27 20:22:41,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 122 transitions, 1095 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 20:22:41,676 INFO L231 Difference]: Finished difference. Result has 105 places, 113 transitions, 927 flow [2024-06-27 20:22:41,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=927, PETRI_PLACES=105, PETRI_TRANSITIONS=113} [2024-06-27 20:22:41,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-27 20:22:41,677 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 113 transitions, 927 flow [2024-06-27 20:22:41,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:41,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:41,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:41,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:22:41,677 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:41,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:41,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1991004008, now seen corresponding path program 1 times [2024-06-27 20:22:41,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:41,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154466036] [2024-06-27 20:22:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:41,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:42,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:42,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154466036] [2024-06-27 20:22:42,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154466036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:42,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:42,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:22:42,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367876848] [2024-06-27 20:22:42,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:42,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:22:42,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:22:42,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:22:42,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:22:42,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 113 transitions, 927 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:42,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:42,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:22:42,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:42,838 INFO L124 PetriNetUnfolderBase]: 1561/2580 cut-off events. [2024-06-27 20:22:42,838 INFO L125 PetriNetUnfolderBase]: For 46224/46226 co-relation queries the response was YES. [2024-06-27 20:22:42,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13477 conditions, 2580 events. 1561/2580 cut-off events. For 46224/46226 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14072 event pairs, 464 based on Foata normal form. 2/2580 useless extension candidates. Maximal degree in co-relation 13433. Up to 2334 conditions per place. [2024-06-27 20:22:42,855 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 110 selfloop transitions, 11 changer transitions 0/129 dead transitions. [2024-06-27 20:22:42,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 129 transitions, 1239 flow [2024-06-27 20:22:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:22:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:22:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:22:42,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:22:42,856 INFO L175 Difference]: Start difference. First operand has 105 places, 113 transitions, 927 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:22:42,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 129 transitions, 1239 flow [2024-06-27 20:22:42,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 129 transitions, 1167 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:42,899 INFO L231 Difference]: Finished difference. Result has 107 places, 116 transitions, 919 flow [2024-06-27 20:22:42,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=919, PETRI_PLACES=107, PETRI_TRANSITIONS=116} [2024-06-27 20:22:42,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-27 20:22:42,900 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 116 transitions, 919 flow [2024-06-27 20:22:42,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:42,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:42,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:42,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:22:42,901 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:42,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:42,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1383963578, now seen corresponding path program 2 times [2024-06-27 20:22:42,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:42,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219606534] [2024-06-27 20:22:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:42,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:43,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219606534] [2024-06-27 20:22:43,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219606534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:43,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:43,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:22:43,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509367104] [2024-06-27 20:22:43,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:43,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:22:43,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:43,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:22:43,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:22:43,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:22:43,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 116 transitions, 919 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:43,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:43,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:22:43,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:44,088 INFO L124 PetriNetUnfolderBase]: 1563/2586 cut-off events. [2024-06-27 20:22:44,089 INFO L125 PetriNetUnfolderBase]: For 49711/49716 co-relation queries the response was YES. [2024-06-27 20:22:44,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13826 conditions, 2586 events. 1563/2586 cut-off events. For 49711/49716 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14109 event pairs, 468 based on Foata normal form. 4/2587 useless extension candidates. Maximal degree in co-relation 13781. Up to 2328 conditions per place. [2024-06-27 20:22:44,106 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 106 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-27 20:22:44,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 130 transitions, 1233 flow [2024-06-27 20:22:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:22:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:22:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:22:44,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:22:44,107 INFO L175 Difference]: Start difference. First operand has 107 places, 116 transitions, 919 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:22:44,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 130 transitions, 1233 flow [2024-06-27 20:22:44,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 130 transitions, 1191 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:44,151 INFO L231 Difference]: Finished difference. Result has 109 places, 119 transitions, 957 flow [2024-06-27 20:22:44,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=957, PETRI_PLACES=109, PETRI_TRANSITIONS=119} [2024-06-27 20:22:44,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-27 20:22:44,151 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 119 transitions, 957 flow [2024-06-27 20:22:44,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:22:44,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:44,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:44,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:22:44,152 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:44,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:44,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1996725864, now seen corresponding path program 1 times [2024-06-27 20:22:44,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:44,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526574599] [2024-06-27 20:22:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:44,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:44,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:44,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526574599] [2024-06-27 20:22:44,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526574599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:44,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:44,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:44,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035063377] [2024-06-27 20:22:44,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:44,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:44,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:45,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:22:45,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 119 transitions, 957 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:45,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:45,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:22:45,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:45,441 INFO L124 PetriNetUnfolderBase]: 1526/2531 cut-off events. [2024-06-27 20:22:45,442 INFO L125 PetriNetUnfolderBase]: For 52903/52913 co-relation queries the response was YES. [2024-06-27 20:22:45,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13902 conditions, 2531 events. 1526/2531 cut-off events. For 52903/52913 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13900 event pairs, 484 based on Foata normal form. 9/2527 useless extension candidates. Maximal degree in co-relation 13856. Up to 2284 conditions per place. [2024-06-27 20:22:45,456 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 100 selfloop transitions, 14 changer transitions 0/132 dead transitions. [2024-06-27 20:22:45,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 132 transitions, 1247 flow [2024-06-27 20:22:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:22:45,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:22:45,458 INFO L175 Difference]: Start difference. First operand has 109 places, 119 transitions, 957 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:22:45,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 132 transitions, 1247 flow [2024-06-27 20:22:45,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 132 transitions, 1189 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:45,499 INFO L231 Difference]: Finished difference. Result has 112 places, 122 transitions, 973 flow [2024-06-27 20:22:45,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=973, PETRI_PLACES=112, PETRI_TRANSITIONS=122} [2024-06-27 20:22:45,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 20:22:45,500 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 122 transitions, 973 flow [2024-06-27 20:22:45,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:45,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:45,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:22:45,501 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)] === [2024-06-27 20:22:45,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2029982990, now seen corresponding path program 1 times [2024-06-27 20:22:45,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:45,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580461685] [2024-06-27 20:22:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:46,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:46,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580461685] [2024-06-27 20:22:46,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580461685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:46,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:46,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174641979] [2024-06-27 20:22:46,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:46,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:46,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:46,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:46,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 122 transitions, 973 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:46,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:46,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:46,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:47,593 INFO L124 PetriNetUnfolderBase]: 1850/3005 cut-off events. [2024-06-27 20:22:47,593 INFO L125 PetriNetUnfolderBase]: For 70751/70756 co-relation queries the response was YES. [2024-06-27 20:22:47,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16991 conditions, 3005 events. 1850/3005 cut-off events. For 70751/70756 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16447 event pairs, 531 based on Foata normal form. 12/3013 useless extension candidates. Maximal degree in co-relation 16944. Up to 2310 conditions per place. [2024-06-27 20:22:47,612 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 55 changer transitions 0/169 dead transitions. [2024-06-27 20:22:47,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 169 transitions, 1544 flow [2024-06-27 20:22:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 20:22:47,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-27 20:22:47,614 INFO L175 Difference]: Start difference. First operand has 112 places, 122 transitions, 973 flow. Second operand 9 states and 186 transitions. [2024-06-27 20:22:47,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 169 transitions, 1544 flow [2024-06-27 20:22:47,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 1492 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:47,668 INFO L231 Difference]: Finished difference. Result has 118 places, 132 transitions, 1179 flow [2024-06-27 20:22:47,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1179, PETRI_PLACES=118, PETRI_TRANSITIONS=132} [2024-06-27 20:22:47,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 20:22:47,668 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 132 transitions, 1179 flow [2024-06-27 20:22:47,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:47,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:47,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:47,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:22:47,669 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)] === [2024-06-27 20:22:47,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:47,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1756566292, now seen corresponding path program 1 times [2024-06-27 20:22:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:47,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115811642] [2024-06-27 20:22:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:47,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:48,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:48,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115811642] [2024-06-27 20:22:48,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115811642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:48,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:48,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:48,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784666739] [2024-06-27 20:22:48,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:48,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:48,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:48,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:48,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 132 transitions, 1179 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:48,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:48,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:48,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:48,945 INFO L124 PetriNetUnfolderBase]: 1796/2928 cut-off events. [2024-06-27 20:22:48,945 INFO L125 PetriNetUnfolderBase]: For 73989/74005 co-relation queries the response was YES. [2024-06-27 20:22:48,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17265 conditions, 2928 events. 1796/2928 cut-off events. For 73989/74005 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16226 event pairs, 555 based on Foata normal form. 10/2917 useless extension candidates. Maximal degree in co-relation 17215. Up to 2679 conditions per place. [2024-06-27 20:22:48,965 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 109 selfloop transitions, 24 changer transitions 0/150 dead transitions. [2024-06-27 20:22:48,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 150 transitions, 1523 flow [2024-06-27 20:22:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:22:48,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:22:48,966 INFO L175 Difference]: Start difference. First operand has 118 places, 132 transitions, 1179 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:22:48,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 150 transitions, 1523 flow [2024-06-27 20:22:49,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 150 transitions, 1431 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:49,024 INFO L231 Difference]: Finished difference. Result has 121 places, 135 transitions, 1181 flow [2024-06-27 20:22:49,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1181, PETRI_PLACES=121, PETRI_TRANSITIONS=135} [2024-06-27 20:22:49,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-27 20:22:49,025 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 135 transitions, 1181 flow [2024-06-27 20:22:49,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:49,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:49,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:49,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:22:49,026 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:49,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:49,026 INFO L85 PathProgramCache]: Analyzing trace with hash 509973072, now seen corresponding path program 2 times [2024-06-27 20:22:49,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:49,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982541263] [2024-06-27 20:22:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:49,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:50,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:50,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982541263] [2024-06-27 20:22:50,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982541263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:50,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:50,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:50,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318634732] [2024-06-27 20:22:50,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:50,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:50,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:50,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:50,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:50,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:50,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 135 transitions, 1181 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:50,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:50,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:50,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:50,937 INFO L124 PetriNetUnfolderBase]: 1980/3240 cut-off events. [2024-06-27 20:22:50,937 INFO L125 PetriNetUnfolderBase]: For 83054/83056 co-relation queries the response was YES. [2024-06-27 20:22:50,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19002 conditions, 3240 events. 1980/3240 cut-off events. For 83054/83056 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18269 event pairs, 568 based on Foata normal form. 12/3240 useless extension candidates. Maximal degree in co-relation 18951. Up to 2613 conditions per place. [2024-06-27 20:22:50,958 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 57 changer transitions 0/175 dead transitions. [2024-06-27 20:22:50,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 175 transitions, 1718 flow [2024-06-27 20:22:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 20:22:50,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-27 20:22:50,961 INFO L175 Difference]: Start difference. First operand has 121 places, 135 transitions, 1181 flow. Second operand 9 states and 184 transitions. [2024-06-27 20:22:50,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 175 transitions, 1718 flow [2024-06-27 20:22:51,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 175 transitions, 1646 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:22:51,052 INFO L231 Difference]: Finished difference. Result has 127 places, 141 transitions, 1322 flow [2024-06-27 20:22:51,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1322, PETRI_PLACES=127, PETRI_TRANSITIONS=141} [2024-06-27 20:22:51,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-27 20:22:51,053 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 141 transitions, 1322 flow [2024-06-27 20:22:51,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:51,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:51,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:51,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:22:51,054 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:51,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash 703912482, now seen corresponding path program 3 times [2024-06-27 20:22:51,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:51,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136390422] [2024-06-27 20:22:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:51,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:52,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:52,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136390422] [2024-06-27 20:22:52,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136390422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:52,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:52,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383878031] [2024-06-27 20:22:52,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:52,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:52,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:52,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:52,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:52,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 141 transitions, 1322 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:52,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:52,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:52,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:52,959 INFO L124 PetriNetUnfolderBase]: 2062/3392 cut-off events. [2024-06-27 20:22:52,959 INFO L125 PetriNetUnfolderBase]: For 91364/91366 co-relation queries the response was YES. [2024-06-27 20:22:52,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20279 conditions, 3392 events. 2062/3392 cut-off events. For 91364/91366 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19485 event pairs, 593 based on Foata normal form. 12/3392 useless extension candidates. Maximal degree in co-relation 20225. Up to 2755 conditions per place. [2024-06-27 20:22:52,979 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 61 changer transitions 0/179 dead transitions. [2024-06-27 20:22:52,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 179 transitions, 1864 flow [2024-06-27 20:22:52,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 20:22:52,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 20:22:52,981 INFO L175 Difference]: Start difference. First operand has 127 places, 141 transitions, 1322 flow. Second operand 9 states and 183 transitions. [2024-06-27 20:22:52,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 179 transitions, 1864 flow [2024-06-27 20:22:53,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 1747 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:53,053 INFO L231 Difference]: Finished difference. Result has 133 places, 145 transitions, 1411 flow [2024-06-27 20:22:53,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=133, PETRI_TRANSITIONS=145} [2024-06-27 20:22:53,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 20:22:53,054 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 145 transitions, 1411 flow [2024-06-27 20:22:53,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:53,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:53,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:53,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:22:53,055 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:53,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash -749328590, now seen corresponding path program 4 times [2024-06-27 20:22:53,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:53,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293272462] [2024-06-27 20:22:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:54,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:54,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293272462] [2024-06-27 20:22:54,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293272462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:54,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:54,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:22:54,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133560638] [2024-06-27 20:22:54,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:54,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:22:54,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:22:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:22:54,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:54,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 145 transitions, 1411 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:54,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:54,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:54,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:54,845 INFO L124 PetriNetUnfolderBase]: 2046/3364 cut-off events. [2024-06-27 20:22:54,846 INFO L125 PetriNetUnfolderBase]: For 93713/93719 co-relation queries the response was YES. [2024-06-27 20:22:54,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20023 conditions, 3364 events. 2046/3364 cut-off events. For 93713/93719 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19224 event pairs, 515 based on Foata normal form. 12/3362 useless extension candidates. Maximal degree in co-relation 19967. Up to 2163 conditions per place. [2024-06-27 20:22:54,869 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 100 selfloop transitions, 71 changer transitions 0/179 dead transitions. [2024-06-27 20:22:54,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 179 transitions, 1843 flow [2024-06-27 20:22:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:22:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:22:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 20:22:54,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-27 20:22:54,871 INFO L175 Difference]: Start difference. First operand has 133 places, 145 transitions, 1411 flow. Second operand 9 states and 182 transitions. [2024-06-27 20:22:54,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 179 transitions, 1843 flow [2024-06-27 20:22:54,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 179 transitions, 1729 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:22:54,957 INFO L231 Difference]: Finished difference. Result has 137 places, 144 transitions, 1399 flow [2024-06-27 20:22:54,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1399, PETRI_PLACES=137, PETRI_TRANSITIONS=144} [2024-06-27 20:22:54,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 20:22:54,958 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 144 transitions, 1399 flow [2024-06-27 20:22:54,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:54,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:54,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:54,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:22:54,958 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)] === [2024-06-27 20:22:54,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:54,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1768530742, now seen corresponding path program 2 times [2024-06-27 20:22:54,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:54,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482079860] [2024-06-27 20:22:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:54,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:55,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:55,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482079860] [2024-06-27 20:22:55,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482079860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:55,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:55,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:55,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463230675] [2024-06-27 20:22:55,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:55,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:55,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:55,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:55,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 144 transitions, 1399 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:55,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:55,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:55,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:56,290 INFO L124 PetriNetUnfolderBase]: 1959/3226 cut-off events. [2024-06-27 20:22:56,290 INFO L125 PetriNetUnfolderBase]: For 92880/92894 co-relation queries the response was YES. [2024-06-27 20:22:56,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19566 conditions, 3226 events. 1959/3226 cut-off events. For 92880/92894 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18599 event pairs, 591 based on Foata normal form. 10/3189 useless extension candidates. Maximal degree in co-relation 19509. Up to 2940 conditions per place. [2024-06-27 20:22:56,314 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 108 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-27 20:22:56,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 161 transitions, 1857 flow [2024-06-27 20:22:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:22:56,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 20:22:56,316 INFO L175 Difference]: Start difference. First operand has 137 places, 144 transitions, 1399 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:22:56,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 161 transitions, 1857 flow [2024-06-27 20:22:56,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 161 transitions, 1671 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-27 20:22:56,379 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 1377 flow [2024-06-27 20:22:56,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1377, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2024-06-27 20:22:56,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 20:22:56,380 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 1377 flow [2024-06-27 20:22:56,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:56,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:56,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:56,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:22:56,381 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:56,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1280687018, now seen corresponding path program 3 times [2024-06-27 20:22:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:56,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241979425] [2024-06-27 20:22:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:56,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:57,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:57,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241979425] [2024-06-27 20:22:57,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241979425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:57,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:57,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:57,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257623085] [2024-06-27 20:22:57,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:57,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:57,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:57,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:57,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:57,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:22:57,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 1377 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:57,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:57,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:22:57,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:57,666 INFO L124 PetriNetUnfolderBase]: 1953/3218 cut-off events. [2024-06-27 20:22:57,666 INFO L125 PetriNetUnfolderBase]: For 96233/96249 co-relation queries the response was YES. [2024-06-27 20:22:57,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19447 conditions, 3218 events. 1953/3218 cut-off events. For 96233/96249 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18524 event pairs, 590 based on Foata normal form. 15/3186 useless extension candidates. Maximal degree in co-relation 19390. Up to 2935 conditions per place. [2024-06-27 20:22:57,688 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 106 selfloop transitions, 37 changer transitions 0/160 dead transitions. [2024-06-27 20:22:57,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 160 transitions, 1691 flow [2024-06-27 20:22:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:22:57,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-27 20:22:57,693 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 1377 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:22:57,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 160 transitions, 1691 flow [2024-06-27 20:22:57,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 160 transitions, 1593 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 20:22:57,767 INFO L231 Difference]: Finished difference. Result has 140 places, 150 transitions, 1359 flow [2024-06-27 20:22:57,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1359, PETRI_PLACES=140, PETRI_TRANSITIONS=150} [2024-06-27 20:22:57,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-27 20:22:57,768 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 150 transitions, 1359 flow [2024-06-27 20:22:57,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:57,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:57,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:57,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:22:57,768 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:57,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:57,768 INFO L85 PathProgramCache]: Analyzing trace with hash 418849320, now seen corresponding path program 1 times [2024-06-27 20:22:57,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:57,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975206205] [2024-06-27 20:22:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:57,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:22:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:22:58,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:22:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975206205] [2024-06-27 20:22:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975206205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:22:58,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:22:58,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:22:58,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253441983] [2024-06-27 20:22:58,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:22:58,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:22:58,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:22:58,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:22:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:22:58,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:22:58,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 150 transitions, 1359 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:58,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:22:58,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:22:58,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:22:59,174 INFO L124 PetriNetUnfolderBase]: 1874/3170 cut-off events. [2024-06-27 20:22:59,174 INFO L125 PetriNetUnfolderBase]: For 86640/86642 co-relation queries the response was YES. [2024-06-27 20:22:59,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18519 conditions, 3170 events. 1874/3170 cut-off events. For 86640/86642 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18683 event pairs, 522 based on Foata normal form. 1/3169 useless extension candidates. Maximal degree in co-relation 18460. Up to 2855 conditions per place. [2024-06-27 20:22:59,196 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 14 changer transitions 0/169 dead transitions. [2024-06-27 20:22:59,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 169 transitions, 1767 flow [2024-06-27 20:22:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:22:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:22:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:22:59,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:22:59,197 INFO L175 Difference]: Start difference. First operand has 140 places, 150 transitions, 1359 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:22:59,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 169 transitions, 1767 flow [2024-06-27 20:22:59,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 169 transitions, 1685 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:22:59,311 INFO L231 Difference]: Finished difference. Result has 141 places, 153 transitions, 1361 flow [2024-06-27 20:22:59,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1361, PETRI_PLACES=141, PETRI_TRANSITIONS=153} [2024-06-27 20:22:59,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-27 20:22:59,312 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 153 transitions, 1361 flow [2024-06-27 20:22:59,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:22:59,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:22:59,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:22:59,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:22:59,312 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:22:59,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:22:59,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1591583734, now seen corresponding path program 1 times [2024-06-27 20:22:59,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:22:59,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288182255] [2024-06-27 20:22:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:22:59,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:22:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:00,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288182255] [2024-06-27 20:23:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288182255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:00,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:00,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:00,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757017606] [2024-06-27 20:23:00,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:00,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:00,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 153 transitions, 1361 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:00,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:00,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:00,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:00,655 INFO L124 PetriNetUnfolderBase]: 1961/3261 cut-off events. [2024-06-27 20:23:00,655 INFO L125 PetriNetUnfolderBase]: For 92012/92014 co-relation queries the response was YES. [2024-06-27 20:23:00,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 3261 events. 1961/3261 cut-off events. For 92012/92014 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18874 event pairs, 549 based on Foata normal form. 2/3261 useless extension candidates. Maximal degree in co-relation 19288. Up to 3022 conditions per place. [2024-06-27 20:23:00,674 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 151 selfloop transitions, 14 changer transitions 0/171 dead transitions. [2024-06-27 20:23:00,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 171 transitions, 1789 flow [2024-06-27 20:23:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:23:00,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 20:23:00,676 INFO L175 Difference]: Start difference. First operand has 141 places, 153 transitions, 1361 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:23:00,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 171 transitions, 1789 flow [2024-06-27 20:23:00,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 171 transitions, 1727 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:00,751 INFO L231 Difference]: Finished difference. Result has 143 places, 156 transitions, 1383 flow [2024-06-27 20:23:00,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1383, PETRI_PLACES=143, PETRI_TRANSITIONS=156} [2024-06-27 20:23:00,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 20:23:00,751 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 156 transitions, 1383 flow [2024-06-27 20:23:00,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:00,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:00,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:00,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:23:00,752 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)] === [2024-06-27 20:23:00,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:00,752 INFO L85 PathProgramCache]: Analyzing trace with hash 423611106, now seen corresponding path program 2 times [2024-06-27 20:23:00,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:00,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634491348] [2024-06-27 20:23:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:00,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:01,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:01,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634491348] [2024-06-27 20:23:01,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634491348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:01,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:01,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:01,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244095826] [2024-06-27 20:23:01,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:01,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:01,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:01,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:01,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 156 transitions, 1383 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:01,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:01,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:01,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:02,050 INFO L124 PetriNetUnfolderBase]: 1979/3289 cut-off events. [2024-06-27 20:23:02,051 INFO L125 PetriNetUnfolderBase]: For 97998/98003 co-relation queries the response was YES. [2024-06-27 20:23:02,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20005 conditions, 3289 events. 1979/3289 cut-off events. For 97998/98003 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19047 event pairs, 556 based on Foata normal form. 4/3290 useless extension candidates. Maximal degree in co-relation 19944. Up to 3018 conditions per place. [2024-06-27 20:23:02,073 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 144 selfloop transitions, 26 changer transitions 0/176 dead transitions. [2024-06-27 20:23:02,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 176 transitions, 1945 flow [2024-06-27 20:23:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:23:02,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:23:02,074 INFO L175 Difference]: Start difference. First operand has 143 places, 156 transitions, 1383 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:23:02,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 176 transitions, 1945 flow [2024-06-27 20:23:02,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 176 transitions, 1883 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:02,158 INFO L231 Difference]: Finished difference. Result has 145 places, 162 transitions, 1485 flow [2024-06-27 20:23:02,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1485, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2024-06-27 20:23:02,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 20:23:02,159 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 1485 flow [2024-06-27 20:23:02,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:02,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:02,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:02,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:23:02,159 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)] === [2024-06-27 20:23:02,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:02,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1768952404, now seen corresponding path program 3 times [2024-06-27 20:23:02,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:02,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293941324] [2024-06-27 20:23:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:02,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:02,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293941324] [2024-06-27 20:23:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293941324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:02,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:02,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:02,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488293562] [2024-06-27 20:23:02,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:02,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:02,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:02,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:02,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:02,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 1485 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:02,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:02,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:02,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:03,500 INFO L124 PetriNetUnfolderBase]: 1973/3281 cut-off events. [2024-06-27 20:23:03,500 INFO L125 PetriNetUnfolderBase]: For 103412/103417 co-relation queries the response was YES. [2024-06-27 20:23:03,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20308 conditions, 3281 events. 1973/3281 cut-off events. For 103412/103417 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19019 event pairs, 553 based on Foata normal form. 4/3282 useless extension candidates. Maximal degree in co-relation 20246. Up to 3013 conditions per place. [2024-06-27 20:23:03,524 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 27 changer transitions 0/175 dead transitions. [2024-06-27 20:23:03,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 1875 flow [2024-06-27 20:23:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:23:03,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 20:23:03,526 INFO L175 Difference]: Start difference. First operand has 145 places, 162 transitions, 1485 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:23:03,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 1875 flow [2024-06-27 20:23:03,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 175 transitions, 1771 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 20:23:03,615 INFO L231 Difference]: Finished difference. Result has 149 places, 162 transitions, 1441 flow [2024-06-27 20:23:03,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=149, PETRI_TRANSITIONS=162} [2024-06-27 20:23:03,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-27 20:23:03,616 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 162 transitions, 1441 flow [2024-06-27 20:23:03,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:03,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:03,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:03,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:23:03,617 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)] === [2024-06-27 20:23:03,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:03,617 INFO L85 PathProgramCache]: Analyzing trace with hash 886905607, now seen corresponding path program 1 times [2024-06-27 20:23:03,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:03,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191840472] [2024-06-27 20:23:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:03,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:04,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:04,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191840472] [2024-06-27 20:23:04,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191840472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:04,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:04,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:04,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584271387] [2024-06-27 20:23:04,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:04,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:04,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:04,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:04,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 162 transitions, 1441 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:04,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:04,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:04,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:04,922 INFO L124 PetriNetUnfolderBase]: 2081/3421 cut-off events. [2024-06-27 20:23:04,923 INFO L125 PetriNetUnfolderBase]: For 128228/128235 co-relation queries the response was YES. [2024-06-27 20:23:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22090 conditions, 3421 events. 2081/3421 cut-off events. For 128228/128235 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19787 event pairs, 588 based on Foata normal form. 8/3426 useless extension candidates. Maximal degree in co-relation 22026. Up to 3105 conditions per place. [2024-06-27 20:23:04,950 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 151 selfloop transitions, 22 changer transitions 0/186 dead transitions. [2024-06-27 20:23:04,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 186 transitions, 1905 flow [2024-06-27 20:23:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:23:04,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:23:04,952 INFO L175 Difference]: Start difference. First operand has 149 places, 162 transitions, 1441 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:23:04,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 186 transitions, 1905 flow [2024-06-27 20:23:05,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 186 transitions, 1843 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:05,053 INFO L231 Difference]: Finished difference. Result has 150 places, 165 transitions, 1479 flow [2024-06-27 20:23:05,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1479, PETRI_PLACES=150, PETRI_TRANSITIONS=165} [2024-06-27 20:23:05,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-27 20:23:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 165 transitions, 1479 flow [2024-06-27 20:23:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:05,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:05,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:05,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:23:05,054 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:05,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash 892619527, now seen corresponding path program 2 times [2024-06-27 20:23:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:05,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908832412] [2024-06-27 20:23:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:05,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:05,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:05,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908832412] [2024-06-27 20:23:05,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908832412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:05,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:05,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:05,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915576105] [2024-06-27 20:23:05,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:05,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:05,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:05,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:05,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:05,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:05,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 165 transitions, 1479 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:05,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:05,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:05,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:06,434 INFO L124 PetriNetUnfolderBase]: 2105/3461 cut-off events. [2024-06-27 20:23:06,435 INFO L125 PetriNetUnfolderBase]: For 137529/137536 co-relation queries the response was YES. [2024-06-27 20:23:06,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22933 conditions, 3461 events. 2105/3461 cut-off events. For 137529/137536 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20074 event pairs, 589 based on Foata normal form. 8/3466 useless extension candidates. Maximal degree in co-relation 22868. Up to 3121 conditions per place. [2024-06-27 20:23:06,461 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2024-06-27 20:23:06,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 193 transitions, 2098 flow [2024-06-27 20:23:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:23:06,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:23:06,462 INFO L175 Difference]: Start difference. First operand has 150 places, 165 transitions, 1479 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:23:06,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 193 transitions, 2098 flow [2024-06-27 20:23:06,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 193 transitions, 2031 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:06,599 INFO L231 Difference]: Finished difference. Result has 154 places, 173 transitions, 1607 flow [2024-06-27 20:23:06,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1607, PETRI_PLACES=154, PETRI_TRANSITIONS=173} [2024-06-27 20:23:06,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 20:23:06,600 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 173 transitions, 1607 flow [2024-06-27 20:23:06,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:06,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:06,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:23:06,601 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:06,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:06,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1362451713, now seen corresponding path program 1 times [2024-06-27 20:23:06,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:06,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155627117] [2024-06-27 20:23:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:07,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:07,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155627117] [2024-06-27 20:23:07,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155627117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:07,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:07,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:07,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775191019] [2024-06-27 20:23:07,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:07,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:07,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 173 transitions, 1607 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:07,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:07,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:07,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:08,116 INFO L124 PetriNetUnfolderBase]: 2025/3331 cut-off events. [2024-06-27 20:23:08,116 INFO L125 PetriNetUnfolderBase]: For 142398/142422 co-relation queries the response was YES. [2024-06-27 20:23:08,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22779 conditions, 3331 events. 2025/3331 cut-off events. For 142398/142422 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19238 event pairs, 586 based on Foata normal form. 13/3311 useless extension candidates. Maximal degree in co-relation 22712. Up to 3012 conditions per place. [2024-06-27 20:23:08,144 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 29 changer transitions 0/192 dead transitions. [2024-06-27 20:23:08,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 192 transitions, 2037 flow [2024-06-27 20:23:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:23:08,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:23:08,146 INFO L175 Difference]: Start difference. First operand has 154 places, 173 transitions, 1607 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:23:08,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 192 transitions, 2037 flow [2024-06-27 20:23:08,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 192 transitions, 1963 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 20:23:08,243 INFO L231 Difference]: Finished difference. Result has 159 places, 176 transitions, 1643 flow [2024-06-27 20:23:08,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1643, PETRI_PLACES=159, PETRI_TRANSITIONS=176} [2024-06-27 20:23:08,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-27 20:23:08,244 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 176 transitions, 1643 flow [2024-06-27 20:23:08,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:08,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:08,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:08,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:23:08,244 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:08,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1898069999, now seen corresponding path program 3 times [2024-06-27 20:23:08,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:08,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235265883] [2024-06-27 20:23:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:08,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:08,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:08,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235265883] [2024-06-27 20:23:08,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235265883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:08,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:08,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:08,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825410326] [2024-06-27 20:23:08,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:08,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:08,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:08,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:08,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:08,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 176 transitions, 1643 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:08,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:08,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:08,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:09,613 INFO L124 PetriNetUnfolderBase]: 2107/3465 cut-off events. [2024-06-27 20:23:09,613 INFO L125 PetriNetUnfolderBase]: For 150167/150185 co-relation queries the response was YES. [2024-06-27 20:23:09,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23911 conditions, 3465 events. 2107/3465 cut-off events. For 150167/150185 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20024 event pairs, 588 based on Foata normal form. 10/3464 useless extension candidates. Maximal degree in co-relation 23842. Up to 3143 conditions per place. [2024-06-27 20:23:09,639 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 161 selfloop transitions, 22 changer transitions 0/196 dead transitions. [2024-06-27 20:23:09,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 196 transitions, 2088 flow [2024-06-27 20:23:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:23:09,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-27 20:23:09,640 INFO L175 Difference]: Start difference. First operand has 159 places, 176 transitions, 1643 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:23:09,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 196 transitions, 2088 flow [2024-06-27 20:23:09,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 196 transitions, 1970 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:09,783 INFO L231 Difference]: Finished difference. Result has 160 places, 177 transitions, 1588 flow [2024-06-27 20:23:09,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1588, PETRI_PLACES=160, PETRI_TRANSITIONS=177} [2024-06-27 20:23:09,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 20:23:09,784 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 177 transitions, 1588 flow [2024-06-27 20:23:09,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:09,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:09,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:09,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:23:09,785 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)] === [2024-06-27 20:23:09,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:09,785 INFO L85 PathProgramCache]: Analyzing trace with hash 92040091, now seen corresponding path program 4 times [2024-06-27 20:23:09,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:09,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075547495] [2024-06-27 20:23:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:09,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:10,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:10,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075547495] [2024-06-27 20:23:10,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075547495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:10,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:10,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:10,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245619327] [2024-06-27 20:23:10,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:10,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:10,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:10,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:10,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:10,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 177 transitions, 1588 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:10,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:10,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:10,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:11,192 INFO L124 PetriNetUnfolderBase]: 2122/3486 cut-off events. [2024-06-27 20:23:11,192 INFO L125 PetriNetUnfolderBase]: For 157314/157332 co-relation queries the response was YES. [2024-06-27 20:23:11,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24183 conditions, 3486 events. 2122/3486 cut-off events. For 157314/157332 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20194 event pairs, 586 based on Foata normal form. 10/3480 useless extension candidates. Maximal degree in co-relation 24113. Up to 3144 conditions per place. [2024-06-27 20:23:11,224 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 30 changer transitions 0/197 dead transitions. [2024-06-27 20:23:11,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 197 transitions, 2078 flow [2024-06-27 20:23:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:23:11,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:23:11,226 INFO L175 Difference]: Start difference. First operand has 160 places, 177 transitions, 1588 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:23:11,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 197 transitions, 2078 flow [2024-06-27 20:23:11,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 197 transitions, 2004 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:11,352 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1642 flow [2024-06-27 20:23:11,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1642, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-06-27 20:23:11,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 20:23:11,353 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1642 flow [2024-06-27 20:23:11,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:11,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:11,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:11,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:23:11,354 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)] === [2024-06-27 20:23:11,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:11,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1010128121, now seen corresponding path program 5 times [2024-06-27 20:23:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:11,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804199406] [2024-06-27 20:23:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:11,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:12,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804199406] [2024-06-27 20:23:12,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804199406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:12,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:12,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:12,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099590574] [2024-06-27 20:23:12,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:12,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:12,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:12,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:12,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:12,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:12,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1642 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:12,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:12,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:12,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:12,716 INFO L124 PetriNetUnfolderBase]: 2138/3515 cut-off events. [2024-06-27 20:23:12,716 INFO L125 PetriNetUnfolderBase]: For 167280/167303 co-relation queries the response was YES. [2024-06-27 20:23:12,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24949 conditions, 3515 events. 2138/3515 cut-off events. For 167280/167303 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 20438 event pairs, 594 based on Foata normal form. 12/3509 useless extension candidates. Maximal degree in co-relation 24878. Up to 3129 conditions per place. [2024-06-27 20:23:12,742 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 146 selfloop transitions, 45 changer transitions 0/204 dead transitions. [2024-06-27 20:23:12,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 204 transitions, 2307 flow [2024-06-27 20:23:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:23:12,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-27 20:23:12,743 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1642 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:23:12,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 204 transitions, 2307 flow [2024-06-27 20:23:12,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 204 transitions, 2201 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:12,890 INFO L231 Difference]: Finished difference. Result has 163 places, 188 transitions, 1788 flow [2024-06-27 20:23:12,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1788, PETRI_PLACES=163, PETRI_TRANSITIONS=188} [2024-06-27 20:23:12,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-27 20:23:12,891 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 188 transitions, 1788 flow [2024-06-27 20:23:12,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:12,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:12,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:12,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:23:12,891 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)] === [2024-06-27 20:23:12,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1450901605, now seen corresponding path program 6 times [2024-06-27 20:23:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:12,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479698403] [2024-06-27 20:23:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:13,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:13,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479698403] [2024-06-27 20:23:13,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479698403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:13,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:13,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:23:13,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641515943] [2024-06-27 20:23:13,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:13,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:23:13,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:23:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:23:13,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:13,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 188 transitions, 1788 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:13,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:13,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:13,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:14,223 INFO L124 PetriNetUnfolderBase]: 2134/3514 cut-off events. [2024-06-27 20:23:14,224 INFO L125 PetriNetUnfolderBase]: For 174684/174699 co-relation queries the response was YES. [2024-06-27 20:23:14,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25335 conditions, 3514 events. 2134/3514 cut-off events. For 174684/174699 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20421 event pairs, 596 based on Foata normal form. 12/3513 useless extension candidates. Maximal degree in co-relation 25262. Up to 3128 conditions per place. [2024-06-27 20:23:14,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 46 changer transitions 0/204 dead transitions. [2024-06-27 20:23:14,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 204 transitions, 2253 flow [2024-06-27 20:23:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:23:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:23:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:23:14,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:23:14,254 INFO L175 Difference]: Start difference. First operand has 163 places, 188 transitions, 1788 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:23:14,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 204 transitions, 2253 flow [2024-06-27 20:23:14,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 204 transitions, 2069 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:14,434 INFO L231 Difference]: Finished difference. Result has 166 places, 189 transitions, 1721 flow [2024-06-27 20:23:14,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1721, PETRI_PLACES=166, PETRI_TRANSITIONS=189} [2024-06-27 20:23:14,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-27 20:23:14,434 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 189 transitions, 1721 flow [2024-06-27 20:23:14,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:14,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:14,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:14,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:23:14,435 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:14,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash -996787705, now seen corresponding path program 2 times [2024-06-27 20:23:14,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:14,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189970411] [2024-06-27 20:23:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:14,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:15,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:15,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189970411] [2024-06-27 20:23:15,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189970411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:15,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:15,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:15,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803940335] [2024-06-27 20:23:15,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:15,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:15,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:15,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:15,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 189 transitions, 1721 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:15,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:15,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:15,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:15,878 INFO L124 PetriNetUnfolderBase]: 2058/3374 cut-off events. [2024-06-27 20:23:15,878 INFO L125 PetriNetUnfolderBase]: For 174272/174280 co-relation queries the response was YES. [2024-06-27 20:23:15,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24244 conditions, 3374 events. 2058/3374 cut-off events. For 174272/174280 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19472 event pairs, 593 based on Foata normal form. 7/3334 useless extension candidates. Maximal degree in co-relation 24170. Up to 3017 conditions per place. [2024-06-27 20:23:15,908 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 51 changer transitions 0/209 dead transitions. [2024-06-27 20:23:15,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 209 transitions, 2307 flow [2024-06-27 20:23:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:23:15,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:23:15,910 INFO L175 Difference]: Start difference. First operand has 166 places, 189 transitions, 1721 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:23:15,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 209 transitions, 2307 flow [2024-06-27 20:23:16,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 209 transitions, 2236 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:16,062 INFO L231 Difference]: Finished difference. Result has 171 places, 197 transitions, 1880 flow [2024-06-27 20:23:16,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1880, PETRI_PLACES=171, PETRI_TRANSITIONS=197} [2024-06-27 20:23:16,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 20:23:16,063 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 197 transitions, 1880 flow [2024-06-27 20:23:16,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:16,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:16,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:16,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:23:16,063 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:16,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1010120185, now seen corresponding path program 3 times [2024-06-27 20:23:16,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:16,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105998628] [2024-06-27 20:23:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:16,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:16,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:16,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105998628] [2024-06-27 20:23:16,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105998628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:16,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:16,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:16,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027831190] [2024-06-27 20:23:16,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:16,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:16,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:16,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:16,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:16,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:16,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 197 transitions, 1880 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:16,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:16,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:16,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:17,473 INFO L124 PetriNetUnfolderBase]: 2053/3372 cut-off events. [2024-06-27 20:23:17,473 INFO L125 PetriNetUnfolderBase]: For 183640/183668 co-relation queries the response was YES. [2024-06-27 20:23:17,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24781 conditions, 3372 events. 2053/3372 cut-off events. For 183640/183668 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19547 event pairs, 594 based on Foata normal form. 10/3334 useless extension candidates. Maximal degree in co-relation 24705. Up to 3015 conditions per place. [2024-06-27 20:23:17,503 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 51 changer transitions 0/213 dead transitions. [2024-06-27 20:23:17,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 213 transitions, 2438 flow [2024-06-27 20:23:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:23:17,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:23:17,504 INFO L175 Difference]: Start difference. First operand has 171 places, 197 transitions, 1880 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:23:17,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 213 transitions, 2438 flow [2024-06-27 20:23:17,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 213 transitions, 2334 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:17,686 INFO L231 Difference]: Finished difference. Result has 175 places, 201 transitions, 1946 flow [2024-06-27 20:23:17,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1946, PETRI_PLACES=175, PETRI_TRANSITIONS=201} [2024-06-27 20:23:17,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 20:23:17,686 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 201 transitions, 1946 flow [2024-06-27 20:23:17,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:17,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:17,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:17,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:23:17,687 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:17,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash -997233175, now seen corresponding path program 4 times [2024-06-27 20:23:17,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:17,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230223836] [2024-06-27 20:23:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:17,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:18,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:18,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230223836] [2024-06-27 20:23:18,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230223836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:18,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:18,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047751136] [2024-06-27 20:23:18,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:18,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:18,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:18,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:18,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:18,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 201 transitions, 1946 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:18,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:18,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:18,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:19,190 INFO L124 PetriNetUnfolderBase]: 2057/3373 cut-off events. [2024-06-27 20:23:19,190 INFO L125 PetriNetUnfolderBase]: For 188586/188604 co-relation queries the response was YES. [2024-06-27 20:23:19,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24951 conditions, 3373 events. 2057/3373 cut-off events. For 188586/188604 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19461 event pairs, 593 based on Foata normal form. 10/3336 useless extension candidates. Maximal degree in co-relation 24873. Up to 3018 conditions per place. [2024-06-27 20:23:19,222 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 134 selfloop transitions, 53 changer transitions 0/212 dead transitions. [2024-06-27 20:23:19,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 212 transitions, 2350 flow [2024-06-27 20:23:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:23:19,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:23:19,223 INFO L175 Difference]: Start difference. First operand has 175 places, 201 transitions, 1946 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:23:19,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 212 transitions, 2350 flow [2024-06-27 20:23:19,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 212 transitions, 2221 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:19,373 INFO L231 Difference]: Finished difference. Result has 179 places, 201 transitions, 1929 flow [2024-06-27 20:23:19,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1929, PETRI_PLACES=179, PETRI_TRANSITIONS=201} [2024-06-27 20:23:19,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-27 20:23:19,374 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 201 transitions, 1929 flow [2024-06-27 20:23:19,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:19,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:19,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:19,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:23:19,374 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)] === [2024-06-27 20:23:19,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:19,375 INFO L85 PathProgramCache]: Analyzing trace with hash 99428662, now seen corresponding path program 1 times [2024-06-27 20:23:19,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:19,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050975358] [2024-06-27 20:23:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:19,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:20,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:20,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050975358] [2024-06-27 20:23:20,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050975358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:20,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:20,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:20,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994164789] [2024-06-27 20:23:20,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:20,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:20,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:20,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:20,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:20,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:20,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 201 transitions, 1929 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:20,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:20,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:20,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:20,851 INFO L124 PetriNetUnfolderBase]: 2128/3501 cut-off events. [2024-06-27 20:23:20,852 INFO L125 PetriNetUnfolderBase]: For 194519/194521 co-relation queries the response was YES. [2024-06-27 20:23:20,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25576 conditions, 3501 events. 2128/3501 cut-off events. For 194519/194521 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20210 event pairs, 593 based on Foata normal form. 1/3500 useless extension candidates. Maximal degree in co-relation 25497. Up to 3215 conditions per place. [2024-06-27 20:23:20,882 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 17 changer transitions 0/221 dead transitions. [2024-06-27 20:23:20,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 221 transitions, 2461 flow [2024-06-27 20:23:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:23:20,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:23:20,883 INFO L175 Difference]: Start difference. First operand has 179 places, 201 transitions, 1929 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:23:20,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 221 transitions, 2461 flow [2024-06-27 20:23:21,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 221 transitions, 2363 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:21,164 INFO L231 Difference]: Finished difference. Result has 181 places, 204 transitions, 1939 flow [2024-06-27 20:23:21,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1939, PETRI_PLACES=181, PETRI_TRANSITIONS=204} [2024-06-27 20:23:21,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 20:23:21,165 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 204 transitions, 1939 flow [2024-06-27 20:23:21,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:21,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:21,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:21,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:23:21,165 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)] === [2024-06-27 20:23:21,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:21,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2094457159, now seen corresponding path program 1 times [2024-06-27 20:23:21,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:21,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862304205] [2024-06-27 20:23:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:21,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:21,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:21,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862304205] [2024-06-27 20:23:21,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862304205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:21,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:21,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:21,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623463728] [2024-06-27 20:23:21,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:21,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:21,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:21,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:22,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:22,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 204 transitions, 1939 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:22,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:22,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:22,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:22,658 INFO L124 PetriNetUnfolderBase]: 2138/3519 cut-off events. [2024-06-27 20:23:22,658 INFO L125 PetriNetUnfolderBase]: For 206634/206636 co-relation queries the response was YES. [2024-06-27 20:23:22,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26072 conditions, 3519 events. 2138/3519 cut-off events. For 206634/206636 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20425 event pairs, 586 based on Foata normal form. 4/3521 useless extension candidates. Maximal degree in co-relation 25992. Up to 3222 conditions per place. [2024-06-27 20:23:22,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 196 selfloop transitions, 17 changer transitions 0/224 dead transitions. [2024-06-27 20:23:22,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 224 transitions, 2487 flow [2024-06-27 20:23:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:23:22,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:23:22,690 INFO L175 Difference]: Start difference. First operand has 181 places, 204 transitions, 1939 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:23:22,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 224 transitions, 2487 flow [2024-06-27 20:23:22,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 224 transitions, 2401 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:22,948 INFO L231 Difference]: Finished difference. Result has 183 places, 207 transitions, 1957 flow [2024-06-27 20:23:22,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1957, PETRI_PLACES=183, PETRI_TRANSITIONS=207} [2024-06-27 20:23:22,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 20:23:22,949 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 207 transitions, 1957 flow [2024-06-27 20:23:22,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:22,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:22,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:22,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:23:22,949 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)] === [2024-06-27 20:23:22,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1004400313, now seen corresponding path program 2 times [2024-06-27 20:23:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:22,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800569474] [2024-06-27 20:23:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:22,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:23,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:23,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800569474] [2024-06-27 20:23:23,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800569474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:23,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:23,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:23,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450038845] [2024-06-27 20:23:23,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:23,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:23,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:23,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:23,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:23,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:23,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 207 transitions, 1957 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:23,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:23,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:23,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:24,494 INFO L124 PetriNetUnfolderBase]: 2159/3557 cut-off events. [2024-06-27 20:23:24,494 INFO L125 PetriNetUnfolderBase]: For 218678/218683 co-relation queries the response was YES. [2024-06-27 20:23:24,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26893 conditions, 3557 events. 2159/3557 cut-off events. For 218678/218683 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20694 event pairs, 595 based on Foata normal form. 6/3560 useless extension candidates. Maximal degree in co-relation 26812. Up to 3195 conditions per place. [2024-06-27 20:23:24,525 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 37 changer transitions 0/229 dead transitions. [2024-06-27 20:23:24,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 229 transitions, 2681 flow [2024-06-27 20:23:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:23:24,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:23:24,526 INFO L175 Difference]: Start difference. First operand has 183 places, 207 transitions, 1957 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:23:24,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 229 transitions, 2681 flow [2024-06-27 20:23:24,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 229 transitions, 2599 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:24,770 INFO L231 Difference]: Finished difference. Result has 185 places, 213 transitions, 2089 flow [2024-06-27 20:23:24,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2089, PETRI_PLACES=185, PETRI_TRANSITIONS=213} [2024-06-27 20:23:24,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 20:23:24,771 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 213 transitions, 2089 flow [2024-06-27 20:23:24,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:24,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:24,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:24,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:23:24,771 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)] === [2024-06-27 20:23:24,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:24,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1458267143, now seen corresponding path program 3 times [2024-06-27 20:23:24,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:24,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381156868] [2024-06-27 20:23:24,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:24,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:25,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381156868] [2024-06-27 20:23:25,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381156868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:25,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:25,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702417228] [2024-06-27 20:23:25,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:25,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:25,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:25,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:25,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 213 transitions, 2089 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:25,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:25,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:25,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:26,279 INFO L124 PetriNetUnfolderBase]: 2167/3573 cut-off events. [2024-06-27 20:23:26,279 INFO L125 PetriNetUnfolderBase]: For 229748/229753 co-relation queries the response was YES. [2024-06-27 20:23:26,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27465 conditions, 3573 events. 2167/3573 cut-off events. For 229748/229753 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20868 event pairs, 589 based on Foata normal form. 6/3573 useless extension candidates. Maximal degree in co-relation 27383. Up to 3203 conditions per place. [2024-06-27 20:23:26,309 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 41 changer transitions 0/232 dead transitions. [2024-06-27 20:23:26,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 2763 flow [2024-06-27 20:23:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:23:26,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:23:26,312 INFO L175 Difference]: Start difference. First operand has 185 places, 213 transitions, 2089 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:23:26,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 2763 flow [2024-06-27 20:23:26,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 232 transitions, 2667 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:26,601 INFO L231 Difference]: Finished difference. Result has 189 places, 216 transitions, 2151 flow [2024-06-27 20:23:26,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2151, PETRI_PLACES=189, PETRI_TRANSITIONS=216} [2024-06-27 20:23:26,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 20:23:26,602 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 216 transitions, 2151 flow [2024-06-27 20:23:26,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:26,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:26,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:26,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:23:26,603 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)] === [2024-06-27 20:23:26,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:26,603 INFO L85 PathProgramCache]: Analyzing trace with hash -997041223, now seen corresponding path program 4 times [2024-06-27 20:23:26,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:26,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130773113] [2024-06-27 20:23:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:26,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:27,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:27,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130773113] [2024-06-27 20:23:27,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130773113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:27,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:27,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:27,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687692719] [2024-06-27 20:23:27,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:27,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:27,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:27,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:27,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:27,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:27,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 216 transitions, 2151 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:27,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:27,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:27,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:28,185 INFO L124 PetriNetUnfolderBase]: 2165/3571 cut-off events. [2024-06-27 20:23:28,185 INFO L125 PetriNetUnfolderBase]: For 232747/232752 co-relation queries the response was YES. [2024-06-27 20:23:28,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27474 conditions, 3571 events. 2165/3571 cut-off events. For 232747/232752 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20834 event pairs, 585 based on Foata normal form. 6/3574 useless extension candidates. Maximal degree in co-relation 27390. Up to 3203 conditions per place. [2024-06-27 20:23:28,220 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 177 selfloop transitions, 43 changer transitions 0/231 dead transitions. [2024-06-27 20:23:28,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 231 transitions, 2653 flow [2024-06-27 20:23:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:23:28,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:23:28,221 INFO L175 Difference]: Start difference. First operand has 189 places, 216 transitions, 2151 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:23:28,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 231 transitions, 2653 flow [2024-06-27 20:23:28,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 231 transitions, 2465 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:28,600 INFO L231 Difference]: Finished difference. Result has 191 places, 216 transitions, 2056 flow [2024-06-27 20:23:28,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2056, PETRI_PLACES=191, PETRI_TRANSITIONS=216} [2024-06-27 20:23:28,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 20:23:28,600 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 216 transitions, 2056 flow [2024-06-27 20:23:28,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:28,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:28,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:28,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:23:28,601 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)] === [2024-06-27 20:23:28,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:28,601 INFO L85 PathProgramCache]: Analyzing trace with hash -996771833, now seen corresponding path program 1 times [2024-06-27 20:23:28,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:28,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023955798] [2024-06-27 20:23:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:28,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:29,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:29,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023955798] [2024-06-27 20:23:29,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023955798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:29,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:29,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:29,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666878232] [2024-06-27 20:23:29,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:29,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:29,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:29,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:29,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 216 transitions, 2056 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:29,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:29,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:29,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:30,389 INFO L124 PetriNetUnfolderBase]: 2110/3462 cut-off events. [2024-06-27 20:23:30,389 INFO L125 PetriNetUnfolderBase]: For 234102/234116 co-relation queries the response was YES. [2024-06-27 20:23:30,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26896 conditions, 3462 events. 2110/3462 cut-off events. For 234102/234116 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20107 event pairs, 602 based on Foata normal form. 9/3439 useless extension candidates. Maximal degree in co-relation 26811. Up to 3169 conditions per place. [2024-06-27 20:23:30,418 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 20 changer transitions 0/231 dead transitions. [2024-06-27 20:23:30,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 231 transitions, 2558 flow [2024-06-27 20:23:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:23:30,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:23:30,419 INFO L175 Difference]: Start difference. First operand has 191 places, 216 transitions, 2056 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:23:30,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 231 transitions, 2558 flow [2024-06-27 20:23:30,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 231 transitions, 2464 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:30,712 INFO L231 Difference]: Finished difference. Result has 193 places, 219 transitions, 2072 flow [2024-06-27 20:23:30,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2072, PETRI_PLACES=193, PETRI_TRANSITIONS=219} [2024-06-27 20:23:30,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-27 20:23:30,713 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 219 transitions, 2072 flow [2024-06-27 20:23:30,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:30,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:30,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:30,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:23:30,714 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)] === [2024-06-27 20:23:30,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1605821663, now seen corresponding path program 1 times [2024-06-27 20:23:30,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:30,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892369814] [2024-06-27 20:23:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:31,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:31,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892369814] [2024-06-27 20:23:31,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892369814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:31,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:31,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:31,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388553593] [2024-06-27 20:23:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:31,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:31,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:31,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:31,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:31,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:31,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 219 transitions, 2072 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:31,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:31,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:31,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:32,271 INFO L124 PetriNetUnfolderBase]: 2200/3587 cut-off events. [2024-06-27 20:23:32,271 INFO L125 PetriNetUnfolderBase]: For 246092/246096 co-relation queries the response was YES. [2024-06-27 20:23:32,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28008 conditions, 3587 events. 2200/3587 cut-off events. For 246092/246096 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20607 event pairs, 472 based on Foata normal form. 6/3583 useless extension candidates. Maximal degree in co-relation 27922. Up to 3233 conditions per place. [2024-06-27 20:23:32,305 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 24 changer transitions 0/249 dead transitions. [2024-06-27 20:23:32,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 249 transitions, 2678 flow [2024-06-27 20:23:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:23:32,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 20:23:32,306 INFO L175 Difference]: Start difference. First operand has 193 places, 219 transitions, 2072 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:23:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 249 transitions, 2678 flow [2024-06-27 20:23:32,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 249 transitions, 2513 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-27 20:23:32,628 INFO L231 Difference]: Finished difference. Result has 191 places, 221 transitions, 2012 flow [2024-06-27 20:23:32,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2012, PETRI_PLACES=191, PETRI_TRANSITIONS=221} [2024-06-27 20:23:32,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 20:23:32,628 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 221 transitions, 2012 flow [2024-06-27 20:23:32,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:32,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:32,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:32,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:23:32,629 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)] === [2024-06-27 20:23:32,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash 426414823, now seen corresponding path program 2 times [2024-06-27 20:23:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:32,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861867145] [2024-06-27 20:23:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:32,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:33,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:33,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861867145] [2024-06-27 20:23:33,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861867145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:33,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:33,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251225093] [2024-06-27 20:23:33,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:33,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:33,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:33,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:33,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:33,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:33,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 221 transitions, 2012 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:33,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:33,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:33,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:34,311 INFO L124 PetriNetUnfolderBase]: 2213/3623 cut-off events. [2024-06-27 20:23:34,312 INFO L125 PetriNetUnfolderBase]: For 254572/254576 co-relation queries the response was YES. [2024-06-27 20:23:34,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28410 conditions, 3623 events. 2213/3623 cut-off events. For 254572/254576 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21114 event pairs, 586 based on Foata normal form. 6/3619 useless extension candidates. Maximal degree in co-relation 28324. Up to 3289 conditions per place. [2024-06-27 20:23:34,347 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 211 selfloop transitions, 25 changer transitions 0/250 dead transitions. [2024-06-27 20:23:34,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 250 transitions, 2634 flow [2024-06-27 20:23:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:23:34,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:23:34,348 INFO L175 Difference]: Start difference. First operand has 191 places, 221 transitions, 2012 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:23:34,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 250 transitions, 2634 flow [2024-06-27 20:23:34,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 250 transitions, 2545 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:34,687 INFO L231 Difference]: Finished difference. Result has 194 places, 226 transitions, 2068 flow [2024-06-27 20:23:34,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2068, PETRI_PLACES=194, PETRI_TRANSITIONS=226} [2024-06-27 20:23:34,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 20:23:34,687 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 226 transitions, 2068 flow [2024-06-27 20:23:34,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:34,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:34,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:23:34,688 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)] === [2024-06-27 20:23:34,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:34,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1551253413, now seen corresponding path program 1 times [2024-06-27 20:23:34,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:34,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725287910] [2024-06-27 20:23:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:35,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:35,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725287910] [2024-06-27 20:23:35,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725287910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:35,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:35,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:35,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735581584] [2024-06-27 20:23:35,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:35,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:35,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:35,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 226 transitions, 2068 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:35,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:35,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:35,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:36,228 INFO L124 PetriNetUnfolderBase]: 2223/3639 cut-off events. [2024-06-27 20:23:36,229 INFO L125 PetriNetUnfolderBase]: For 264365/264369 co-relation queries the response was YES. [2024-06-27 20:23:36,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28772 conditions, 3639 events. 2223/3639 cut-off events. For 264365/264369 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21166 event pairs, 585 based on Foata normal form. 6/3635 useless extension candidates. Maximal degree in co-relation 28684. Up to 3285 conditions per place. [2024-06-27 20:23:36,265 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 215 selfloop transitions, 28 changer transitions 0/257 dead transitions. [2024-06-27 20:23:36,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 257 transitions, 2730 flow [2024-06-27 20:23:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:23:36,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:23:36,267 INFO L175 Difference]: Start difference. First operand has 194 places, 226 transitions, 2068 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:23:36,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 257 transitions, 2730 flow [2024-06-27 20:23:36,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 257 transitions, 2637 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:36,677 INFO L231 Difference]: Finished difference. Result has 198 places, 230 transitions, 2138 flow [2024-06-27 20:23:36,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2138, PETRI_PLACES=198, PETRI_TRANSITIONS=230} [2024-06-27 20:23:36,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 20:23:36,678 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 230 transitions, 2138 flow [2024-06-27 20:23:36,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:36,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:36,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:36,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:23:36,679 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)] === [2024-06-27 20:23:36,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:36,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1545539493, now seen corresponding path program 2 times [2024-06-27 20:23:36,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:36,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081507335] [2024-06-27 20:23:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:37,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:37,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081507335] [2024-06-27 20:23:37,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081507335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:37,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:37,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:37,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506408492] [2024-06-27 20:23:37,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:37,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:37,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:37,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:37,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:37,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:37,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 230 transitions, 2138 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:37,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:37,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:37,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:38,312 INFO L124 PetriNetUnfolderBase]: 2233/3655 cut-off events. [2024-06-27 20:23:38,312 INFO L125 PetriNetUnfolderBase]: For 276402/276406 co-relation queries the response was YES. [2024-06-27 20:23:38,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29466 conditions, 3655 events. 2233/3655 cut-off events. For 276402/276406 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21259 event pairs, 585 based on Foata normal form. 6/3651 useless extension candidates. Maximal degree in co-relation 29376. Up to 3286 conditions per place. [2024-06-27 20:23:38,347 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 214 selfloop transitions, 34 changer transitions 0/262 dead transitions. [2024-06-27 20:23:38,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 262 transitions, 2818 flow [2024-06-27 20:23:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:23:38,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 20:23:38,348 INFO L175 Difference]: Start difference. First operand has 198 places, 230 transitions, 2138 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:23:38,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 262 transitions, 2818 flow [2024-06-27 20:23:38,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 262 transitions, 2703 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:38,789 INFO L231 Difference]: Finished difference. Result has 202 places, 233 transitions, 2185 flow [2024-06-27 20:23:38,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2185, PETRI_PLACES=202, PETRI_TRANSITIONS=233} [2024-06-27 20:23:38,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 20:23:38,790 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 233 transitions, 2185 flow [2024-06-27 20:23:38,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:38,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:38,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:38,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:23:38,791 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:38,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:38,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1901279873, now seen corresponding path program 3 times [2024-06-27 20:23:38,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:38,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331902705] [2024-06-27 20:23:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:38,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:39,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:39,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331902705] [2024-06-27 20:23:39,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331902705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:39,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:39,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:39,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913588917] [2024-06-27 20:23:39,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:39,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:39,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:39,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:39,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:39,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 233 transitions, 2185 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:39,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:39,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:39,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:40,537 INFO L124 PetriNetUnfolderBase]: 2241/3665 cut-off events. [2024-06-27 20:23:40,537 INFO L125 PetriNetUnfolderBase]: For 289386/289388 co-relation queries the response was YES. [2024-06-27 20:23:40,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30095 conditions, 3665 events. 2241/3665 cut-off events. For 289386/289388 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21320 event pairs, 589 based on Foata normal form. 2/3657 useless extension candidates. Maximal degree in co-relation 30004. Up to 3321 conditions per place. [2024-06-27 20:23:40,568 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 209 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-27 20:23:40,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 252 transitions, 2769 flow [2024-06-27 20:23:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:23:40,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:23:40,569 INFO L175 Difference]: Start difference. First operand has 202 places, 233 transitions, 2185 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:23:40,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 252 transitions, 2769 flow [2024-06-27 20:23:40,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 252 transitions, 2629 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:40,912 INFO L231 Difference]: Finished difference. Result has 203 places, 235 transitions, 2172 flow [2024-06-27 20:23:40,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2172, PETRI_PLACES=203, PETRI_TRANSITIONS=235} [2024-06-27 20:23:40,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 20:23:40,913 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 235 transitions, 2172 flow [2024-06-27 20:23:40,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:40,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:40,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:40,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:23:40,913 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)] === [2024-06-27 20:23:40,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:40,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1723972769, now seen corresponding path program 3 times [2024-06-27 20:23:40,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:40,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26743476] [2024-06-27 20:23:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:40,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:41,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26743476] [2024-06-27 20:23:41,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26743476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:41,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941171010] [2024-06-27 20:23:41,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:41,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:41,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:41,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:41,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 235 transitions, 2172 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:41,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:41,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:41,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:42,462 INFO L124 PetriNetUnfolderBase]: 2251/3684 cut-off events. [2024-06-27 20:23:42,462 INFO L125 PetriNetUnfolderBase]: For 298944/298949 co-relation queries the response was YES. [2024-06-27 20:23:42,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30407 conditions, 3684 events. 2251/3684 cut-off events. For 298944/298949 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21508 event pairs, 593 based on Foata normal form. 4/3677 useless extension candidates. Maximal degree in co-relation 30315. Up to 3277 conditions per place. [2024-06-27 20:23:42,497 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 39 changer transitions 0/261 dead transitions. [2024-06-27 20:23:42,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 261 transitions, 2830 flow [2024-06-27 20:23:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:23:42,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 20:23:42,498 INFO L175 Difference]: Start difference. First operand has 203 places, 235 transitions, 2172 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:23:42,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 261 transitions, 2830 flow [2024-06-27 20:23:42,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 261 transitions, 2688 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 20:23:42,853 INFO L231 Difference]: Finished difference. Result has 204 places, 238 transitions, 2210 flow [2024-06-27 20:23:42,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2210, PETRI_PLACES=204, PETRI_TRANSITIONS=238} [2024-06-27 20:23:42,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-27 20:23:42,853 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 238 transitions, 2210 flow [2024-06-27 20:23:42,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:42,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:42,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:42,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:23:42,854 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)] === [2024-06-27 20:23:42,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:42,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1724151515, now seen corresponding path program 1 times [2024-06-27 20:23:42,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:42,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186568651] [2024-06-27 20:23:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:42,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:43,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:43,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186568651] [2024-06-27 20:23:43,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186568651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:43,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:43,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:43,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377468993] [2024-06-27 20:23:43,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:43,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:43,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:43,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:43,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:43,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 238 transitions, 2210 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:43,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:43,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:43,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:44,711 INFO L124 PetriNetUnfolderBase]: 2256/3692 cut-off events. [2024-06-27 20:23:44,711 INFO L125 PetriNetUnfolderBase]: For 309897/309904 co-relation queries the response was YES. [2024-06-27 20:23:44,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30984 conditions, 3692 events. 2256/3692 cut-off events. For 309897/309904 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21532 event pairs, 592 based on Foata normal form. 5/3685 useless extension candidates. Maximal degree in co-relation 30893. Up to 3323 conditions per place. [2024-06-27 20:23:44,749 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 219 selfloop transitions, 32 changer transitions 0/265 dead transitions. [2024-06-27 20:23:44,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 265 transitions, 2876 flow [2024-06-27 20:23:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:23:44,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:23:44,750 INFO L175 Difference]: Start difference. First operand has 204 places, 238 transitions, 2210 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:23:44,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 265 transitions, 2876 flow [2024-06-27 20:23:45,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 265 transitions, 2715 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:45,154 INFO L231 Difference]: Finished difference. Result has 206 places, 241 transitions, 2211 flow [2024-06-27 20:23:45,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2211, PETRI_PLACES=206, PETRI_TRANSITIONS=241} [2024-06-27 20:23:45,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 20:23:45,155 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 241 transitions, 2211 flow [2024-06-27 20:23:45,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:45,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:45,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:45,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:23:45,155 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)] === [2024-06-27 20:23:45,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:45,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1724271671, now seen corresponding path program 1 times [2024-06-27 20:23:45,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:45,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28774935] [2024-06-27 20:23:45,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:45,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:45,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:45,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28774935] [2024-06-27 20:23:45,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28774935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:45,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:45,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:45,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055955651] [2024-06-27 20:23:45,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:45,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:45,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:45,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:45,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:45,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:23:45,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 241 transitions, 2211 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:23:45,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:45,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:23:45,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:46,709 INFO L124 PetriNetUnfolderBase]: 2348/3791 cut-off events. [2024-06-27 20:23:46,709 INFO L125 PetriNetUnfolderBase]: For 321917/321924 co-relation queries the response was YES. [2024-06-27 20:23:46,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31816 conditions, 3791 events. 2348/3791 cut-off events. For 321917/321924 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21705 event pairs, 619 based on Foata normal form. 8/3796 useless extension candidates. Maximal degree in co-relation 31725. Up to 3532 conditions per place. [2024-06-27 20:23:46,745 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 25 changer transitions 0/267 dead transitions. [2024-06-27 20:23:46,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 267 transitions, 2891 flow [2024-06-27 20:23:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:23:46,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:23:46,746 INFO L175 Difference]: Start difference. First operand has 206 places, 241 transitions, 2211 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:23:46,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 267 transitions, 2891 flow [2024-06-27 20:23:47,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 267 transitions, 2751 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:47,163 INFO L231 Difference]: Finished difference. Result has 208 places, 244 transitions, 2205 flow [2024-06-27 20:23:47,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2205, PETRI_PLACES=208, PETRI_TRANSITIONS=244} [2024-06-27 20:23:47,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 20:23:47,164 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 244 transitions, 2205 flow [2024-06-27 20:23:47,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:23:47,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:47,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:47,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:23:47,164 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)] === [2024-06-27 20:23:47,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:47,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1063184415, now seen corresponding path program 4 times [2024-06-27 20:23:47,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:47,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598122406] [2024-06-27 20:23:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:47,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:47,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:47,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598122406] [2024-06-27 20:23:47,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598122406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:47,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:47,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:47,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702636963] [2024-06-27 20:23:47,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:47,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:47,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:48,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:48,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 244 transitions, 2205 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:48,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:48,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:48,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:48,778 INFO L124 PetriNetUnfolderBase]: 2289/3738 cut-off events. [2024-06-27 20:23:48,778 INFO L125 PetriNetUnfolderBase]: For 339061/339078 co-relation queries the response was YES. [2024-06-27 20:23:48,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32186 conditions, 3738 events. 2289/3738 cut-off events. For 339061/339078 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21768 event pairs, 591 based on Foata normal form. 4/3726 useless extension candidates. Maximal degree in co-relation 32094. Up to 3301 conditions per place. [2024-06-27 20:23:48,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 206 selfloop transitions, 47 changer transitions 0/268 dead transitions. [2024-06-27 20:23:48,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 268 transitions, 2885 flow [2024-06-27 20:23:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:23:48,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:23:48,819 INFO L175 Difference]: Start difference. First operand has 208 places, 244 transitions, 2205 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:23:48,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 268 transitions, 2885 flow [2024-06-27 20:23:49,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 268 transitions, 2773 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:49,358 INFO L231 Difference]: Finished difference. Result has 210 places, 247 transitions, 2301 flow [2024-06-27 20:23:49,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2301, PETRI_PLACES=210, PETRI_TRANSITIONS=247} [2024-06-27 20:23:49,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-27 20:23:49,359 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 247 transitions, 2301 flow [2024-06-27 20:23:49,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:49,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:49,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:49,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:23:49,359 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:49,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1901640341, now seen corresponding path program 2 times [2024-06-27 20:23:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:49,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265025791] [2024-06-27 20:23:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:49,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:50,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:50,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265025791] [2024-06-27 20:23:50,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265025791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:50,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:50,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:50,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506110147] [2024-06-27 20:23:50,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:50,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:50,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:50,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:50,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:50,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:23:50,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 247 transitions, 2301 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:23:50,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:50,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:23:50,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:50,919 INFO L124 PetriNetUnfolderBase]: 2384/3847 cut-off events. [2024-06-27 20:23:50,919 INFO L125 PetriNetUnfolderBase]: For 354757/354764 co-relation queries the response was YES. [2024-06-27 20:23:50,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33469 conditions, 3847 events. 2384/3847 cut-off events. For 354757/354764 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22085 event pairs, 619 based on Foata normal form. 8/3852 useless extension candidates. Maximal degree in co-relation 33376. Up to 3541 conditions per place. [2024-06-27 20:23:50,961 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-27 20:23:50,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 277 transitions, 3224 flow [2024-06-27 20:23:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:23:50,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:23:50,963 INFO L175 Difference]: Start difference. First operand has 210 places, 247 transitions, 2301 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:23:50,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 277 transitions, 3224 flow [2024-06-27 20:23:51,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 277 transitions, 3038 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:23:51,406 INFO L231 Difference]: Finished difference. Result has 213 places, 255 transitions, 2394 flow [2024-06-27 20:23:51,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2394, PETRI_PLACES=213, PETRI_TRANSITIONS=255} [2024-06-27 20:23:51,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 20:23:51,407 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 255 transitions, 2394 flow [2024-06-27 20:23:51,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:23:51,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:51,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:51,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:23:51,407 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:51,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:51,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1901403191, now seen corresponding path program 3 times [2024-06-27 20:23:51,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:51,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532851313] [2024-06-27 20:23:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:51,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:52,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532851313] [2024-06-27 20:23:52,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532851313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:52,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:52,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754370160] [2024-06-27 20:23:52,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:52,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:52,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:23:52,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 255 transitions, 2394 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:23:52,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:52,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:23:52,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:53,077 INFO L124 PetriNetUnfolderBase]: 2394/3861 cut-off events. [2024-06-27 20:23:53,077 INFO L125 PetriNetUnfolderBase]: For 367750/367757 co-relation queries the response was YES. [2024-06-27 20:23:53,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33991 conditions, 3861 events. 2394/3861 cut-off events. For 367750/367757 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22177 event pairs, 624 based on Foata normal form. 8/3866 useless extension candidates. Maximal degree in co-relation 33896. Up to 3551 conditions per place. [2024-06-27 20:23:53,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2024-06-27 20:23:53,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 280 transitions, 3241 flow [2024-06-27 20:23:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:23:53,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:23:53,124 INFO L175 Difference]: Start difference. First operand has 213 places, 255 transitions, 2394 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:23:53,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 280 transitions, 3241 flow [2024-06-27 20:23:53,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 280 transitions, 3096 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 20:23:53,590 INFO L231 Difference]: Finished difference. Result has 217 places, 258 transitions, 2424 flow [2024-06-27 20:23:53,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2424, PETRI_PLACES=217, PETRI_TRANSITIONS=258} [2024-06-27 20:23:53,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-27 20:23:53,591 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 258 transitions, 2424 flow [2024-06-27 20:23:53,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:23:53,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:53,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:53,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:23:53,592 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:23:53,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:53,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1901402819, now seen corresponding path program 5 times [2024-06-27 20:23:53,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:53,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014348960] [2024-06-27 20:23:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:53,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:54,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:54,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014348960] [2024-06-27 20:23:54,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014348960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:54,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:54,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:54,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957918579] [2024-06-27 20:23:54,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:54,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:54,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:54,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:54,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:54,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 258 transitions, 2424 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:54,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:54,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:54,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:55,271 INFO L124 PetriNetUnfolderBase]: 2363/3857 cut-off events. [2024-06-27 20:23:55,271 INFO L125 PetriNetUnfolderBase]: For 392919/392926 co-relation queries the response was YES. [2024-06-27 20:23:55,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34905 conditions, 3857 events. 2363/3857 cut-off events. For 392919/392926 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22677 event pairs, 599 based on Foata normal form. 6/3847 useless extension candidates. Maximal degree in co-relation 34808. Up to 3334 conditions per place. [2024-06-27 20:23:55,307 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 66 changer transitions 0/288 dead transitions. [2024-06-27 20:23:55,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 288 transitions, 3618 flow [2024-06-27 20:23:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:23:55,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 20:23:55,309 INFO L175 Difference]: Start difference. First operand has 217 places, 258 transitions, 2424 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:23:55,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 288 transitions, 3618 flow [2024-06-27 20:23:55,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 288 transitions, 3504 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 20:23:55,861 INFO L231 Difference]: Finished difference. Result has 220 places, 267 transitions, 2784 flow [2024-06-27 20:23:55,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2784, PETRI_PLACES=220, PETRI_TRANSITIONS=267} [2024-06-27 20:23:55,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-27 20:23:55,862 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 267 transitions, 2784 flow [2024-06-27 20:23:55,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:55,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:55,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:55,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:23:55,863 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)] === [2024-06-27 20:23:55,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:55,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1901282849, now seen corresponding path program 6 times [2024-06-27 20:23:55,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:55,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548053355] [2024-06-27 20:23:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:55,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:56,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:56,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548053355] [2024-06-27 20:23:56,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548053355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:56,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:56,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:23:56,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652004696] [2024-06-27 20:23:56,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:56,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:23:56,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:23:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:23:56,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:56,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 267 transitions, 2784 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:56,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:56,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:56,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:57,566 INFO L124 PetriNetUnfolderBase]: 2356/3840 cut-off events. [2024-06-27 20:23:57,566 INFO L125 PetriNetUnfolderBase]: For 402410/402412 co-relation queries the response was YES. [2024-06-27 20:23:57,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35181 conditions, 3840 events. 2356/3840 cut-off events. For 402410/402412 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22473 event pairs, 599 based on Foata normal form. 2/3832 useless extension candidates. Maximal degree in co-relation 35083. Up to 3462 conditions per place. [2024-06-27 20:23:57,607 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 30 changer transitions 0/284 dead transitions. [2024-06-27 20:23:57,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 284 transitions, 3368 flow [2024-06-27 20:23:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:23:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:23:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:23:57,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:23:57,608 INFO L175 Difference]: Start difference. First operand has 220 places, 267 transitions, 2784 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:23:57,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 284 transitions, 3368 flow [2024-06-27 20:23:58,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 284 transitions, 3129 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-06-27 20:23:58,211 INFO L231 Difference]: Finished difference. Result has 225 places, 267 transitions, 2611 flow [2024-06-27 20:23:58,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2611, PETRI_PLACES=225, PETRI_TRANSITIONS=267} [2024-06-27 20:23:58,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-27 20:23:58,211 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 267 transitions, 2611 flow [2024-06-27 20:23:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:58,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:23:58,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:23:58,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:23:58,212 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)] === [2024-06-27 20:23:58,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:23:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1056508875, now seen corresponding path program 1 times [2024-06-27 20:23:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:23:58,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531236328] [2024-06-27 20:23:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:23:58,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:23:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:23:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:23:59,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:23:59,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531236328] [2024-06-27 20:23:59,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531236328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:23:59,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:23:59,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:23:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648397271] [2024-06-27 20:23:59,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:23:59,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:23:59,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:23:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:23:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:23:59,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:23:59,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 267 transitions, 2611 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:23:59,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:23:59,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:23:59,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:23:59,877 INFO L124 PetriNetUnfolderBase]: 2288/3722 cut-off events. [2024-06-27 20:23:59,877 INFO L125 PetriNetUnfolderBase]: For 400562/400578 co-relation queries the response was YES. [2024-06-27 20:23:59,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34388 conditions, 3722 events. 2288/3722 cut-off events. For 400562/400578 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21558 event pairs, 599 based on Foata normal form. 12/3694 useless extension candidates. Maximal degree in co-relation 34288. Up to 3329 conditions per place. [2024-06-27 20:23:59,917 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 37 changer transitions 0/287 dead transitions. [2024-06-27 20:23:59,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 287 transitions, 3245 flow [2024-06-27 20:23:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:23:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:23:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:23:59,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:23:59,918 INFO L175 Difference]: Start difference. First operand has 225 places, 267 transitions, 2611 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:23:59,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 287 transitions, 3245 flow [2024-06-27 20:24:00,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 287 transitions, 3165 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:00,480 INFO L231 Difference]: Finished difference. Result has 227 places, 270 transitions, 2689 flow [2024-06-27 20:24:00,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2689, PETRI_PLACES=227, PETRI_TRANSITIONS=270} [2024-06-27 20:24:00,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-27 20:24:00,481 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 270 transitions, 2689 flow [2024-06-27 20:24:00,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:00,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:00,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:00,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:24:00,481 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)] === [2024-06-27 20:24:00,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1903454951, now seen corresponding path program 4 times [2024-06-27 20:24:00,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:00,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073438426] [2024-06-27 20:24:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:00,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:01,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:01,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073438426] [2024-06-27 20:24:01,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073438426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:01,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:01,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:01,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170009558] [2024-06-27 20:24:01,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:01,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:01,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:01,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:01,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 270 transitions, 2689 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:01,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:01,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:01,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:02,052 INFO L124 PetriNetUnfolderBase]: 2361/3848 cut-off events. [2024-06-27 20:24:02,052 INFO L125 PetriNetUnfolderBase]: For 411737/411739 co-relation queries the response was YES. [2024-06-27 20:24:02,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35533 conditions, 3848 events. 2361/3848 cut-off events. For 411737/411739 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22431 event pairs, 606 based on Foata normal form. 2/3830 useless extension candidates. Maximal degree in co-relation 35432. Up to 3460 conditions per place. [2024-06-27 20:24:02,093 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 229 selfloop transitions, 36 changer transitions 0/284 dead transitions. [2024-06-27 20:24:02,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 284 transitions, 3325 flow [2024-06-27 20:24:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:24:02,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:24:02,094 INFO L175 Difference]: Start difference. First operand has 227 places, 270 transitions, 2689 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:24:02,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 284 transitions, 3325 flow [2024-06-27 20:24:02,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 284 transitions, 3189 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:02,718 INFO L231 Difference]: Finished difference. Result has 228 places, 272 transitions, 2708 flow [2024-06-27 20:24:02,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2708, PETRI_PLACES=228, PETRI_TRANSITIONS=272} [2024-06-27 20:24:02,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 20:24:02,718 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 272 transitions, 2708 flow [2024-06-27 20:24:02,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:02,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:02,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:02,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:24:02,719 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)] === [2024-06-27 20:24:02,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:02,719 INFO L85 PathProgramCache]: Analyzing trace with hash 376751545, now seen corresponding path program 2 times [2024-06-27 20:24:02,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:02,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895612653] [2024-06-27 20:24:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:02,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:03,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:03,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895612653] [2024-06-27 20:24:03,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895612653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:03,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:03,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:03,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553494723] [2024-06-27 20:24:03,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:03,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:03,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:03,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:03,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 272 transitions, 2708 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:03,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:03,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:03,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:04,415 INFO L124 PetriNetUnfolderBase]: 2366/3860 cut-off events. [2024-06-27 20:24:04,415 INFO L125 PetriNetUnfolderBase]: For 422588/422603 co-relation queries the response was YES. [2024-06-27 20:24:04,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35823 conditions, 3860 events. 2366/3860 cut-off events. For 422588/422603 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22556 event pairs, 598 based on Foata normal form. 12/3858 useless extension candidates. Maximal degree in co-relation 35721. Up to 3457 conditions per place. [2024-06-27 20:24:04,452 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 33 changer transitions 0/297 dead transitions. [2024-06-27 20:24:04,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 297 transitions, 3446 flow [2024-06-27 20:24:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:24:04,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:24:04,454 INFO L175 Difference]: Start difference. First operand has 228 places, 272 transitions, 2708 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:24:04,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 297 transitions, 3446 flow [2024-06-27 20:24:05,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 297 transitions, 3254 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:05,079 INFO L231 Difference]: Finished difference. Result has 228 places, 275 transitions, 2704 flow [2024-06-27 20:24:05,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2704, PETRI_PLACES=228, PETRI_TRANSITIONS=275} [2024-06-27 20:24:05,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-27 20:24:05,080 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 275 transitions, 2704 flow [2024-06-27 20:24:05,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:05,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:05,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:05,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:24:05,081 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)] === [2024-06-27 20:24:05,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:05,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1212691001, now seen corresponding path program 3 times [2024-06-27 20:24:05,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:05,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118977203] [2024-06-27 20:24:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:05,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:06,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:06,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118977203] [2024-06-27 20:24:06,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118977203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:06,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:06,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:06,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308837352] [2024-06-27 20:24:06,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:06,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:06,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:06,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:06,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 275 transitions, 2704 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:06,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:06,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:06,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:06,820 INFO L124 PetriNetUnfolderBase]: 2371/3867 cut-off events. [2024-06-27 20:24:06,820 INFO L125 PetriNetUnfolderBase]: For 434497/434509 co-relation queries the response was YES. [2024-06-27 20:24:06,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36271 conditions, 3867 events. 2371/3867 cut-off events. For 434497/434509 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22650 event pairs, 600 based on Foata normal form. 9/3858 useless extension candidates. Maximal degree in co-relation 36169. Up to 3451 conditions per place. [2024-06-27 20:24:06,956 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 44 changer transitions 0/301 dead transitions. [2024-06-27 20:24:06,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 301 transitions, 3700 flow [2024-06-27 20:24:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:24:06,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:24:06,958 INFO L175 Difference]: Start difference. First operand has 228 places, 275 transitions, 2704 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:24:06,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 301 transitions, 3700 flow [2024-06-27 20:24:07,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 301 transitions, 3534 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:07,701 INFO L231 Difference]: Finished difference. Result has 230 places, 281 transitions, 2870 flow [2024-06-27 20:24:07,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2870, PETRI_PLACES=230, PETRI_TRANSITIONS=281} [2024-06-27 20:24:07,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-27 20:24:07,701 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 281 transitions, 2870 flow [2024-06-27 20:24:07,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:07,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:07,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:07,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:24:07,702 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)] === [2024-06-27 20:24:07,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:07,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1751364123, now seen corresponding path program 4 times [2024-06-27 20:24:07,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:07,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968707300] [2024-06-27 20:24:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:07,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:08,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:08,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968707300] [2024-06-27 20:24:08,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968707300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:08,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:08,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:08,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432806623] [2024-06-27 20:24:08,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:08,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:08,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:08,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:08,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 281 transitions, 2870 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:08,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:08,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:08,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:09,385 INFO L124 PetriNetUnfolderBase]: 2368/3863 cut-off events. [2024-06-27 20:24:09,385 INFO L125 PetriNetUnfolderBase]: For 447781/447796 co-relation queries the response was YES. [2024-06-27 20:24:09,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36546 conditions, 3863 events. 2368/3863 cut-off events. For 447781/447796 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 22612 event pairs, 600 based on Foata normal form. 12/3861 useless extension candidates. Maximal degree in co-relation 36443. Up to 3460 conditions per place. [2024-06-27 20:24:09,425 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 252 selfloop transitions, 32 changer transitions 0/303 dead transitions. [2024-06-27 20:24:09,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 303 transitions, 3510 flow [2024-06-27 20:24:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:24:09,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:24:09,427 INFO L175 Difference]: Start difference. First operand has 230 places, 281 transitions, 2870 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:24:09,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 303 transitions, 3510 flow [2024-06-27 20:24:10,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 303 transitions, 3270 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:10,300 INFO L231 Difference]: Finished difference. Result has 234 places, 281 transitions, 2700 flow [2024-06-27 20:24:10,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2700, PETRI_PLACES=234, PETRI_TRANSITIONS=281} [2024-06-27 20:24:10,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-27 20:24:10,300 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 281 transitions, 2700 flow [2024-06-27 20:24:10,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:10,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:10,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:10,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:24:10,301 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)] === [2024-06-27 20:24:10,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:10,302 INFO L85 PathProgramCache]: Analyzing trace with hash 701634183, now seen corresponding path program 7 times [2024-06-27 20:24:10,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:10,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068888779] [2024-06-27 20:24:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:10,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:11,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:11,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068888779] [2024-06-27 20:24:11,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068888779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:11,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:11,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:11,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141147094] [2024-06-27 20:24:11,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:11,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:11,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:11,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:11,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:11,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:11,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 281 transitions, 2700 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:11,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:11,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:11,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:12,008 INFO L124 PetriNetUnfolderBase]: 2378/3878 cut-off events. [2024-06-27 20:24:12,008 INFO L125 PetriNetUnfolderBase]: For 460161/460166 co-relation queries the response was YES. [2024-06-27 20:24:12,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36790 conditions, 3878 events. 2378/3878 cut-off events. For 460161/460166 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22683 event pairs, 611 based on Foata normal form. 5/3863 useless extension candidates. Maximal degree in co-relation 36685. Up to 3435 conditions per place. [2024-06-27 20:24:12,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 39 changer transitions 0/305 dead transitions. [2024-06-27 20:24:12,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 305 transitions, 3446 flow [2024-06-27 20:24:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:24:12,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:24:12,052 INFO L175 Difference]: Start difference. First operand has 234 places, 281 transitions, 2700 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:24:12,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 305 transitions, 3446 flow [2024-06-27 20:24:12,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 305 transitions, 3354 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:12,771 INFO L231 Difference]: Finished difference. Result has 235 places, 284 transitions, 2804 flow [2024-06-27 20:24:12,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2804, PETRI_PLACES=235, PETRI_TRANSITIONS=284} [2024-06-27 20:24:12,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 20:24:12,772 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 284 transitions, 2804 flow [2024-06-27 20:24:12,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:12,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:12,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:12,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:24:12,772 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)] === [2024-06-27 20:24:12,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:12,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1451899835, now seen corresponding path program 4 times [2024-06-27 20:24:12,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:12,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566837151] [2024-06-27 20:24:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:12,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:13,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:13,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566837151] [2024-06-27 20:24:13,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566837151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:13,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:13,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:13,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104389288] [2024-06-27 20:24:13,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:13,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:13,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:13,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:13,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:24:13,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 284 transitions, 2804 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:13,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:13,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:24:13,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:14,478 INFO L124 PetriNetUnfolderBase]: 2446/3951 cut-off events. [2024-06-27 20:24:14,479 INFO L125 PetriNetUnfolderBase]: For 464194/464206 co-relation queries the response was YES. [2024-06-27 20:24:14,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37148 conditions, 3951 events. 2446/3951 cut-off events. For 464194/464206 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22826 event pairs, 631 based on Foata normal form. 10/3955 useless extension candidates. Maximal degree in co-relation 37042. Up to 3669 conditions per place. [2024-06-27 20:24:14,521 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 25 changer transitions 0/306 dead transitions. [2024-06-27 20:24:14,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 306 transitions, 3502 flow [2024-06-27 20:24:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:24:14,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:24:14,522 INFO L175 Difference]: Start difference. First operand has 235 places, 284 transitions, 2804 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:24:14,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 306 transitions, 3502 flow [2024-06-27 20:24:15,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 306 transitions, 3225 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:15,331 INFO L231 Difference]: Finished difference. Result has 235 places, 285 transitions, 2603 flow [2024-06-27 20:24:15,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2603, PETRI_PLACES=235, PETRI_TRANSITIONS=285} [2024-06-27 20:24:15,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 20:24:15,332 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 285 transitions, 2603 flow [2024-06-27 20:24:15,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:15,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:15,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:15,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:24:15,332 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)] === [2024-06-27 20:24:15,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1451900207, now seen corresponding path program 8 times [2024-06-27 20:24:15,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:15,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112054288] [2024-06-27 20:24:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:15,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:16,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:16,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112054288] [2024-06-27 20:24:16,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112054288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:16,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:16,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:16,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194425452] [2024-06-27 20:24:16,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:16,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:16,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:16,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:16,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:16,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:16,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 285 transitions, 2603 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:16,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:16,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:16,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:17,004 INFO L124 PetriNetUnfolderBase]: 2364/3862 cut-off events. [2024-06-27 20:24:17,004 INFO L125 PetriNetUnfolderBase]: For 469558/469563 co-relation queries the response was YES. [2024-06-27 20:24:17,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36350 conditions, 3862 events. 2364/3862 cut-off events. For 469558/469563 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22637 event pairs, 605 based on Foata normal form. 5/3847 useless extension candidates. Maximal degree in co-relation 36243. Up to 3407 conditions per place. [2024-06-27 20:24:17,050 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 241 selfloop transitions, 44 changer transitions 0/304 dead transitions. [2024-06-27 20:24:17,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 304 transitions, 3239 flow [2024-06-27 20:24:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:24:17,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:24:17,051 INFO L175 Difference]: Start difference. First operand has 235 places, 285 transitions, 2603 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:24:17,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 304 transitions, 3239 flow [2024-06-27 20:24:17,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 304 transitions, 3125 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:17,860 INFO L231 Difference]: Finished difference. Result has 237 places, 285 transitions, 2583 flow [2024-06-27 20:24:17,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2583, PETRI_PLACES=237, PETRI_TRANSITIONS=285} [2024-06-27 20:24:17,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 20:24:17,860 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 285 transitions, 2583 flow [2024-06-27 20:24:17,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:17,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:17,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:17,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:24:17,861 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)] === [2024-06-27 20:24:17,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1097221085, now seen corresponding path program 5 times [2024-06-27 20:24:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:17,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965708061] [2024-06-27 20:24:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:18,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:18,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965708061] [2024-06-27 20:24:18,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965708061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:18,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:18,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:18,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279261907] [2024-06-27 20:24:18,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:18,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:18,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:18,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:18,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:18,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:24:18,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 285 transitions, 2583 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:18,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:18,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:24:18,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:19,455 INFO L124 PetriNetUnfolderBase]: 2466/3981 cut-off events. [2024-06-27 20:24:19,455 INFO L125 PetriNetUnfolderBase]: For 484339/484351 co-relation queries the response was YES. [2024-06-27 20:24:19,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37427 conditions, 3981 events. 2466/3981 cut-off events. For 484339/484351 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23032 event pairs, 622 based on Foata normal form. 10/3985 useless extension candidates. Maximal degree in co-relation 37319. Up to 3642 conditions per place. [2024-06-27 20:24:19,498 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 262 selfloop transitions, 44 changer transitions 0/311 dead transitions. [2024-06-27 20:24:19,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 311 transitions, 3611 flow [2024-06-27 20:24:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:24:19,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:24:19,499 INFO L175 Difference]: Start difference. First operand has 237 places, 285 transitions, 2583 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:24:19,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 311 transitions, 3611 flow [2024-06-27 20:24:20,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 311 transitions, 3447 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:20,235 INFO L231 Difference]: Finished difference. Result has 238 places, 291 transitions, 2711 flow [2024-06-27 20:24:20,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2711, PETRI_PLACES=238, PETRI_TRANSITIONS=291} [2024-06-27 20:24:20,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-27 20:24:20,235 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 291 transitions, 2711 flow [2024-06-27 20:24:20,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:20,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:20,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:20,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:24:20,236 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)] === [2024-06-27 20:24:20,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 503233591, now seen corresponding path program 6 times [2024-06-27 20:24:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:20,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527306493] [2024-06-27 20:24:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:20,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:21,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:21,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527306493] [2024-06-27 20:24:21,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527306493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:21,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:21,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:21,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615771625] [2024-06-27 20:24:21,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:21,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:21,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:21,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:21,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:24:21,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 291 transitions, 2711 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:21,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:21,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:24:21,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:21,931 INFO L124 PetriNetUnfolderBase]: 2460/3973 cut-off events. [2024-06-27 20:24:21,931 INFO L125 PetriNetUnfolderBase]: For 494385/494397 co-relation queries the response was YES. [2024-06-27 20:24:21,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37600 conditions, 3973 events. 2460/3973 cut-off events. For 494385/494397 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22965 event pairs, 626 based on Foata normal form. 10/3977 useless extension candidates. Maximal degree in co-relation 37491. Up to 3637 conditions per place. [2024-06-27 20:24:21,969 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 263 selfloop transitions, 42 changer transitions 0/310 dead transitions. [2024-06-27 20:24:21,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 310 transitions, 3397 flow [2024-06-27 20:24:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:24:21,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:24:21,971 INFO L175 Difference]: Start difference. First operand has 238 places, 291 transitions, 2711 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:24:21,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 310 transitions, 3397 flow [2024-06-27 20:24:22,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 310 transitions, 3203 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:22,837 INFO L231 Difference]: Finished difference. Result has 242 places, 291 transitions, 2607 flow [2024-06-27 20:24:22,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2607, PETRI_PLACES=242, PETRI_TRANSITIONS=291} [2024-06-27 20:24:22,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-27 20:24:22,838 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 291 transitions, 2607 flow [2024-06-27 20:24:22,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:22,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:22,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:22,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:24:22,839 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)] === [2024-06-27 20:24:22,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:22,839 INFO L85 PathProgramCache]: Analyzing trace with hash 144889859, now seen corresponding path program 9 times [2024-06-27 20:24:22,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:22,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890666462] [2024-06-27 20:24:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:22,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:23,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:23,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890666462] [2024-06-27 20:24:23,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890666462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:23,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:23,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:23,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423055017] [2024-06-27 20:24:23,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:23,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:23,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:23,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:23,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:23,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:23,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 291 transitions, 2607 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:23,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:23,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:23,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:24,450 INFO L124 PetriNetUnfolderBase]: 2397/3917 cut-off events. [2024-06-27 20:24:24,450 INFO L125 PetriNetUnfolderBase]: For 512136/512141 co-relation queries the response was YES. [2024-06-27 20:24:24,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37643 conditions, 3917 events. 2397/3917 cut-off events. For 512136/512141 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23100 event pairs, 603 based on Foata normal form. 5/3893 useless extension candidates. Maximal degree in co-relation 37532. Up to 3398 conditions per place. [2024-06-27 20:24:24,495 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 62 changer transitions 0/311 dead transitions. [2024-06-27 20:24:24,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 311 transitions, 3381 flow [2024-06-27 20:24:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:24:24,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:24:24,496 INFO L175 Difference]: Start difference. First operand has 242 places, 291 transitions, 2607 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:24:24,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 311 transitions, 3381 flow [2024-06-27 20:24:25,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 311 transitions, 3263 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:25,311 INFO L231 Difference]: Finished difference. Result has 243 places, 294 transitions, 2755 flow [2024-06-27 20:24:25,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2489, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2755, PETRI_PLACES=243, PETRI_TRANSITIONS=294} [2024-06-27 20:24:25,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-27 20:24:25,312 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 294 transitions, 2755 flow [2024-06-27 20:24:25,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:25,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:25,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:25,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:24:25,312 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)] === [2024-06-27 20:24:25,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:25,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1248961899, now seen corresponding path program 7 times [2024-06-27 20:24:25,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:25,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995495251] [2024-06-27 20:24:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:25,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:26,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:26,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995495251] [2024-06-27 20:24:26,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995495251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:26,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:26,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:26,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160518256] [2024-06-27 20:24:26,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:26,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:26,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:26,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:26,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:26,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:24:26,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 294 transitions, 2755 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:26,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:26,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:24:26,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:26,944 INFO L124 PetriNetUnfolderBase]: 2504/4048 cut-off events. [2024-06-27 20:24:26,944 INFO L125 PetriNetUnfolderBase]: For 535406/535421 co-relation queries the response was YES. [2024-06-27 20:24:26,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39344 conditions, 4048 events. 2504/4048 cut-off events. For 535406/535421 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23566 event pairs, 626 based on Foata normal form. 12/4052 useless extension candidates. Maximal degree in co-relation 39232. Up to 3583 conditions per place. [2024-06-27 20:24:26,990 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 240 selfloop transitions, 81 changer transitions 0/326 dead transitions. [2024-06-27 20:24:26,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 326 transitions, 4117 flow [2024-06-27 20:24:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:24:26,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:24:26,992 INFO L175 Difference]: Start difference. First operand has 243 places, 294 transitions, 2755 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:24:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 326 transitions, 4117 flow [2024-06-27 20:24:27,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 326 transitions, 3873 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 20:24:27,847 INFO L231 Difference]: Finished difference. Result has 247 places, 306 transitions, 3060 flow [2024-06-27 20:24:27,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3060, PETRI_PLACES=247, PETRI_TRANSITIONS=306} [2024-06-27 20:24:27,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 20:24:27,847 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 306 transitions, 3060 flow [2024-06-27 20:24:27,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:27,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:27,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:27,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:24:27,848 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)] === [2024-06-27 20:24:27,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:27,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1903577897, now seen corresponding path program 10 times [2024-06-27 20:24:27,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:27,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477719070] [2024-06-27 20:24:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:27,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:28,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:28,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477719070] [2024-06-27 20:24:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477719070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:28,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:28,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038766740] [2024-06-27 20:24:28,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:28,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:28,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:28,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 306 transitions, 3060 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:28,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:28,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:28,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:29,580 INFO L124 PetriNetUnfolderBase]: 2463/4030 cut-off events. [2024-06-27 20:24:29,580 INFO L125 PetriNetUnfolderBase]: For 571169/571174 co-relation queries the response was YES. [2024-06-27 20:24:29,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40614 conditions, 4030 events. 2463/4030 cut-off events. For 571169/571174 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23960 event pairs, 627 based on Foata normal form. 4/4002 useless extension candidates. Maximal degree in co-relation 40499. Up to 3385 conditions per place. [2024-06-27 20:24:29,621 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 211 selfloop transitions, 95 changer transitions 0/332 dead transitions. [2024-06-27 20:24:29,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 332 transitions, 4460 flow [2024-06-27 20:24:29,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:24:29,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 20:24:29,623 INFO L175 Difference]: Start difference. First operand has 247 places, 306 transitions, 3060 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:24:29,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 332 transitions, 4460 flow [2024-06-27 20:24:30,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 332 transitions, 4192 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:30,451 INFO L231 Difference]: Finished difference. Result has 251 places, 315 transitions, 3408 flow [2024-06-27 20:24:30,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3408, PETRI_PLACES=251, PETRI_TRANSITIONS=315} [2024-06-27 20:24:30,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-27 20:24:30,451 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 315 transitions, 3408 flow [2024-06-27 20:24:30,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:30,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:30,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:30,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:24:30,452 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)] === [2024-06-27 20:24:30,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:30,452 INFO L85 PathProgramCache]: Analyzing trace with hash -931998033, now seen corresponding path program 11 times [2024-06-27 20:24:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:30,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138091151] [2024-06-27 20:24:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:30,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:31,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138091151] [2024-06-27 20:24:31,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138091151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:31,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:31,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:31,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420363852] [2024-06-27 20:24:31,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:31,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:31,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:31,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:31,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:31,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:31,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 315 transitions, 3408 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:31,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:31,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:31,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:32,083 INFO L124 PetriNetUnfolderBase]: 2458/4025 cut-off events. [2024-06-27 20:24:32,083 INFO L125 PetriNetUnfolderBase]: For 571319/571324 co-relation queries the response was YES. [2024-06-27 20:24:32,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40163 conditions, 4025 events. 2458/4025 cut-off events. For 571319/571324 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23912 event pairs, 633 based on Foata normal form. 4/3997 useless extension candidates. Maximal degree in co-relation 40047. Up to 3381 conditions per place. [2024-06-27 20:24:32,130 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 97 changer transitions 0/331 dead transitions. [2024-06-27 20:24:32,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 331 transitions, 4238 flow [2024-06-27 20:24:32,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:24:32,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:24:32,131 INFO L175 Difference]: Start difference. First operand has 251 places, 315 transitions, 3408 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:24:32,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 331 transitions, 4238 flow [2024-06-27 20:24:32,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 331 transitions, 3840 flow, removed 131 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:33,003 INFO L231 Difference]: Finished difference. Result has 255 places, 315 transitions, 3210 flow [2024-06-27 20:24:33,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3210, PETRI_PLACES=255, PETRI_TRANSITIONS=315} [2024-06-27 20:24:33,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 20:24:33,003 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 315 transitions, 3210 flow [2024-06-27 20:24:33,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:33,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:33,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:33,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:24:33,004 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)] === [2024-06-27 20:24:33,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:33,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1908219899, now seen corresponding path program 8 times [2024-06-27 20:24:33,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:33,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881080349] [2024-06-27 20:24:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:33,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:33,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:33,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881080349] [2024-06-27 20:24:33,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881080349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:33,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:33,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:33,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126103866] [2024-06-27 20:24:33,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:33,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:33,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:33,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:33,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:33,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:24:33,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 315 transitions, 3210 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:33,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:33,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:24:33,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:34,645 INFO L124 PetriNetUnfolderBase]: 2558/4131 cut-off events. [2024-06-27 20:24:34,645 INFO L125 PetriNetUnfolderBase]: For 572917/572932 co-relation queries the response was YES. [2024-06-27 20:24:34,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 4131 events. 2558/4131 cut-off events. For 572917/572932 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 24093 event pairs, 635 based on Foata normal form. 12/4135 useless extension candidates. Maximal degree in co-relation 40266. Up to 3647 conditions per place. [2024-06-27 20:24:34,696 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 88 changer transitions 0/343 dead transitions. [2024-06-27 20:24:34,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 343 transitions, 4500 flow [2024-06-27 20:24:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:34,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:24:34,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:24:34,697 INFO L175 Difference]: Start difference. First operand has 255 places, 315 transitions, 3210 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:24:34,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 343 transitions, 4500 flow [2024-06-27 20:24:35,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 343 transitions, 4268 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:35,691 INFO L231 Difference]: Finished difference. Result has 257 places, 324 transitions, 3425 flow [2024-06-27 20:24:35,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3425, PETRI_PLACES=257, PETRI_TRANSITIONS=324} [2024-06-27 20:24:35,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 20:24:35,692 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 324 transitions, 3425 flow [2024-06-27 20:24:35,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:35,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:35,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:35,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:24:35,692 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)] === [2024-06-27 20:24:35,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:35,692 INFO L85 PathProgramCache]: Analyzing trace with hash -843750669, now seen corresponding path program 9 times [2024-06-27 20:24:35,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:35,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659371306] [2024-06-27 20:24:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:35,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:36,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:36,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659371306] [2024-06-27 20:24:36,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659371306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:36,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:36,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:36,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697282886] [2024-06-27 20:24:36,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:36,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:36,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:36,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:36,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:24:36,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 324 transitions, 3425 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:36,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:36,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:24:36,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:37,442 INFO L124 PetriNetUnfolderBase]: 2568/4141 cut-off events. [2024-06-27 20:24:37,442 INFO L125 PetriNetUnfolderBase]: For 586215/586230 co-relation queries the response was YES. [2024-06-27 20:24:37,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40743 conditions, 4141 events. 2568/4141 cut-off events. For 586215/586230 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24132 event pairs, 619 based on Foata normal form. 12/4145 useless extension candidates. Maximal degree in co-relation 40624. Up to 3657 conditions per place. [2024-06-27 20:24:37,487 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 245 selfloop transitions, 96 changer transitions 0/346 dead transitions. [2024-06-27 20:24:37,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 346 transitions, 4598 flow [2024-06-27 20:24:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:24:37,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:24:37,488 INFO L175 Difference]: Start difference. First operand has 257 places, 324 transitions, 3425 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:24:37,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 346 transitions, 4598 flow [2024-06-27 20:24:38,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 346 transitions, 4393 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-27 20:24:38,369 INFO L231 Difference]: Finished difference. Result has 262 places, 327 transitions, 3511 flow [2024-06-27 20:24:38,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3511, PETRI_PLACES=262, PETRI_TRANSITIONS=327} [2024-06-27 20:24:38,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 20:24:38,370 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 327 transitions, 3511 flow [2024-06-27 20:24:38,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:38,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:38,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:38,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:24:38,371 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:38,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1249319391, now seen corresponding path program 12 times [2024-06-27 20:24:38,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:38,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108821802] [2024-06-27 20:24:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:39,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:39,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108821802] [2024-06-27 20:24:39,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108821802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:39,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:39,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:39,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737993280] [2024-06-27 20:24:39,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:39,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:39,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:39,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:39,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 327 transitions, 3511 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:39,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:39,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:39,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:40,137 INFO L124 PetriNetUnfolderBase]: 2489/4053 cut-off events. [2024-06-27 20:24:40,137 INFO L125 PetriNetUnfolderBase]: For 593680/593682 co-relation queries the response was YES. [2024-06-27 20:24:40,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40149 conditions, 4053 events. 2489/4053 cut-off events. For 593680/593682 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 23811 event pairs, 627 based on Foata normal form. 2/4039 useless extension candidates. Maximal degree in co-relation 40029. Up to 3610 conditions per place. [2024-06-27 20:24:40,185 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 37 changer transitions 0/339 dead transitions. [2024-06-27 20:24:40,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 339 transitions, 4169 flow [2024-06-27 20:24:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:24:40,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:24:40,186 INFO L175 Difference]: Start difference. First operand has 262 places, 327 transitions, 3511 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:24:40,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 339 transitions, 4169 flow [2024-06-27 20:24:41,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 339 transitions, 3875 flow, removed 86 selfloop flow, removed 4 redundant places. [2024-06-27 20:24:41,313 INFO L231 Difference]: Finished difference. Result has 266 places, 327 transitions, 3297 flow [2024-06-27 20:24:41,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3297, PETRI_PLACES=266, PETRI_TRANSITIONS=327} [2024-06-27 20:24:41,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-27 20:24:41,314 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 327 transitions, 3297 flow [2024-06-27 20:24:41,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:41,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:41,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:41,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:24:41,315 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:41,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:41,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1851146905, now seen corresponding path program 10 times [2024-06-27 20:24:41,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:41,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157345007] [2024-06-27 20:24:41,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:41,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:42,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:42,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157345007] [2024-06-27 20:24:42,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157345007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:42,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:42,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:42,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559034662] [2024-06-27 20:24:42,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:42,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:42,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:42,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:42,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:42,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:24:42,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 327 transitions, 3297 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:42,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:42,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:24:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:42,917 INFO L124 PetriNetUnfolderBase]: 2556/4127 cut-off events. [2024-06-27 20:24:42,918 INFO L125 PetriNetUnfolderBase]: For 594966/594981 co-relation queries the response was YES. [2024-06-27 20:24:42,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40025 conditions, 4127 events. 2556/4127 cut-off events. For 594966/594981 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 24104 event pairs, 624 based on Foata normal form. 12/4131 useless extension candidates. Maximal degree in co-relation 39904. Up to 3644 conditions per place. [2024-06-27 20:24:42,966 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 91 changer transitions 0/346 dead transitions. [2024-06-27 20:24:42,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 346 transitions, 4385 flow [2024-06-27 20:24:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:24:42,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:24:42,967 INFO L175 Difference]: Start difference. First operand has 266 places, 327 transitions, 3297 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:24:42,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 346 transitions, 4385 flow [2024-06-27 20:24:44,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 346 transitions, 4235 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:44,146 INFO L231 Difference]: Finished difference. Result has 267 places, 327 transitions, 3335 flow [2024-06-27 20:24:44,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3335, PETRI_PLACES=267, PETRI_TRANSITIONS=327} [2024-06-27 20:24:44,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-27 20:24:44,147 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 327 transitions, 3335 flow [2024-06-27 20:24:44,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:44,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:44,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:44,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:24:44,148 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:44,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:44,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1072055439, now seen corresponding path program 11 times [2024-06-27 20:24:44,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:44,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820649829] [2024-06-27 20:24:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:44,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:44,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:44,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820649829] [2024-06-27 20:24:44,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820649829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:44,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:44,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:44,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381533213] [2024-06-27 20:24:44,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:44,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:44,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:44,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:45,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:24:45,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 327 transitions, 3335 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:45,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:45,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:24:45,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:45,918 INFO L124 PetriNetUnfolderBase]: 2550/4121 cut-off events. [2024-06-27 20:24:45,919 INFO L125 PetriNetUnfolderBase]: For 600379/600394 co-relation queries the response was YES. [2024-06-27 20:24:45,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40037 conditions, 4121 events. 2550/4121 cut-off events. For 600379/600394 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 24052 event pairs, 633 based on Foata normal form. 12/4125 useless extension candidates. Maximal degree in co-relation 39915. Up to 3639 conditions per place. [2024-06-27 20:24:45,968 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 92 changer transitions 0/345 dead transitions. [2024-06-27 20:24:45,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 345 transitions, 4257 flow [2024-06-27 20:24:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:24:45,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:24:45,969 INFO L175 Difference]: Start difference. First operand has 267 places, 327 transitions, 3335 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:24:45,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 345 transitions, 4257 flow [2024-06-27 20:24:46,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 345 transitions, 4025 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:24:46,928 INFO L231 Difference]: Finished difference. Result has 270 places, 327 transitions, 3293 flow [2024-06-27 20:24:46,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3293, PETRI_PLACES=270, PETRI_TRANSITIONS=327} [2024-06-27 20:24:46,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 20:24:46,928 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 327 transitions, 3293 flow [2024-06-27 20:24:46,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:46,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:46,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:46,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:24:46,929 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:46,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:46,929 INFO L85 PathProgramCache]: Analyzing trace with hash -849464589, now seen corresponding path program 12 times [2024-06-27 20:24:46,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:46,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840313153] [2024-06-27 20:24:46,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:46,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:47,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:47,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840313153] [2024-06-27 20:24:47,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840313153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:47,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:47,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:24:47,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351049307] [2024-06-27 20:24:47,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:47,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:24:47,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:47,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:24:47,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:24:47,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:24:47,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 327 transitions, 3293 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:47,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:47,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:24:47,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:48,693 INFO L124 PetriNetUnfolderBase]: 2544/4115 cut-off events. [2024-06-27 20:24:48,693 INFO L125 PetriNetUnfolderBase]: For 605295/605310 co-relation queries the response was YES. [2024-06-27 20:24:48,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39890 conditions, 4115 events. 2544/4115 cut-off events. For 605295/605310 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24051 event pairs, 620 based on Foata normal form. 12/4119 useless extension candidates. Maximal degree in co-relation 39767. Up to 3634 conditions per place. [2024-06-27 20:24:48,744 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 243 selfloop transitions, 96 changer transitions 0/344 dead transitions. [2024-06-27 20:24:48,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 344 transitions, 4045 flow [2024-06-27 20:24:48,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:24:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:24:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:24:48,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:24:48,746 INFO L175 Difference]: Start difference. First operand has 270 places, 327 transitions, 3293 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:24:48,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 344 transitions, 4045 flow [2024-06-27 20:24:49,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 344 transitions, 3793 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:49,793 INFO L231 Difference]: Finished difference. Result has 271 places, 327 transitions, 3239 flow [2024-06-27 20:24:49,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3239, PETRI_PLACES=271, PETRI_TRANSITIONS=327} [2024-06-27 20:24:49,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-27 20:24:49,793 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 327 transitions, 3239 flow [2024-06-27 20:24:49,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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) [2024-06-27 20:24:49,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:49,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:49,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:24:49,794 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:24:49,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:49,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1248952971, now seen corresponding path program 2 times [2024-06-27 20:24:49,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:49,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197012408] [2024-06-27 20:24:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:49,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:50,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:50,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197012408] [2024-06-27 20:24:50,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197012408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:50,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:50,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:50,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600016204] [2024-06-27 20:24:50,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:50,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:50,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:50,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 327 transitions, 3239 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:50,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:50,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:50,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:51,579 INFO L124 PetriNetUnfolderBase]: 2369/3862 cut-off events. [2024-06-27 20:24:51,579 INFO L125 PetriNetUnfolderBase]: For 620950/620974 co-relation queries the response was YES. [2024-06-27 20:24:51,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 3862 events. 2369/3862 cut-off events. For 620950/620974 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22799 event pairs, 614 based on Foata normal form. 10/3809 useless extension candidates. Maximal degree in co-relation 38299. Up to 3385 conditions per place. [2024-06-27 20:24:51,628 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 65 changer transitions 0/346 dead transitions. [2024-06-27 20:24:51,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 346 transitions, 4211 flow [2024-06-27 20:24:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:24:51,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:24:51,630 INFO L175 Difference]: Start difference. First operand has 271 places, 327 transitions, 3239 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:24:51,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 346 transitions, 4211 flow [2024-06-27 20:24:52,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 346 transitions, 3979 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:24:52,905 INFO L231 Difference]: Finished difference. Result has 272 places, 333 transitions, 3313 flow [2024-06-27 20:24:52,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3313, PETRI_PLACES=272, PETRI_TRANSITIONS=333} [2024-06-27 20:24:52,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 20:24:52,906 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 333 transitions, 3313 flow [2024-06-27 20:24:52,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:52,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:52,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:52,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:24:52,907 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)] === [2024-06-27 20:24:52,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:52,907 INFO L85 PathProgramCache]: Analyzing trace with hash -835170861, now seen corresponding path program 3 times [2024-06-27 20:24:52,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:52,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919963427] [2024-06-27 20:24:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:52,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:53,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919963427] [2024-06-27 20:24:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919963427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:53,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:53,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:53,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767052715] [2024-06-27 20:24:53,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:53,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:53,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:53,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:53,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:54,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:54,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 333 transitions, 3313 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:54,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:54,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:54,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:55,044 INFO L124 PetriNetUnfolderBase]: 2377/3881 cut-off events. [2024-06-27 20:24:55,044 INFO L125 PetriNetUnfolderBase]: For 637998/638024 co-relation queries the response was YES. [2024-06-27 20:24:55,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38934 conditions, 3881 events. 2377/3881 cut-off events. For 637998/638024 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22974 event pairs, 613 based on Foata normal form. 10/3842 useless extension candidates. Maximal degree in co-relation 38809. Up to 3489 conditions per place. [2024-06-27 20:24:55,094 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 20 changer transitions 0/348 dead transitions. [2024-06-27 20:24:55,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 348 transitions, 4041 flow [2024-06-27 20:24:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:55,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:24:55,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:24:55,096 INFO L175 Difference]: Start difference. First operand has 272 places, 333 transitions, 3313 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:24:55,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 348 transitions, 4041 flow [2024-06-27 20:24:56,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 348 transitions, 3899 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 20:24:56,165 INFO L231 Difference]: Finished difference. Result has 276 places, 336 transitions, 3311 flow [2024-06-27 20:24:56,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3311, PETRI_PLACES=276, PETRI_TRANSITIONS=336} [2024-06-27 20:24:56,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 20:24:56,166 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 336 transitions, 3311 flow [2024-06-27 20:24:56,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:56,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:56,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:56,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:24:56,166 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)] === [2024-06-27 20:24:56,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:56,166 INFO L85 PathProgramCache]: Analyzing trace with hash -835646091, now seen corresponding path program 4 times [2024-06-27 20:24:56,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:56,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534289968] [2024-06-27 20:24:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:56,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:24:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:24:57,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:24:57,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534289968] [2024-06-27 20:24:57,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534289968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:24:57,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:24:57,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:24:57,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734100821] [2024-06-27 20:24:57,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:24:57,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:24:57,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:24:57,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:24:57,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:24:57,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:24:57,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 336 transitions, 3311 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:57,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:24:57,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:24:57,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:24:58,007 INFO L124 PetriNetUnfolderBase]: 2382/3880 cut-off events. [2024-06-27 20:24:58,007 INFO L125 PetriNetUnfolderBase]: For 650813/650853 co-relation queries the response was YES. [2024-06-27 20:24:58,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39048 conditions, 3880 events. 2382/3880 cut-off events. For 650813/650853 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22867 event pairs, 612 based on Foata normal form. 10/3826 useless extension candidates. Maximal degree in co-relation 38921. Up to 3397 conditions per place. [2024-06-27 20:24:58,058 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 78 changer transitions 0/352 dead transitions. [2024-06-27 20:24:58,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 352 transitions, 4225 flow [2024-06-27 20:24:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:24:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:24:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:24:58,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:24:58,060 INFO L175 Difference]: Start difference. First operand has 276 places, 336 transitions, 3311 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:24:58,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 352 transitions, 4225 flow [2024-06-27 20:24:59,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 352 transitions, 4117 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 20:24:59,154 INFO L231 Difference]: Finished difference. Result has 278 places, 339 transitions, 3455 flow [2024-06-27 20:24:59,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3203, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3455, PETRI_PLACES=278, PETRI_TRANSITIONS=339} [2024-06-27 20:24:59,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 20:24:59,154 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 339 transitions, 3455 flow [2024-06-27 20:24:59,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:24:59,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:24:59,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:24:59,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:24:59,154 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)] === [2024-06-27 20:24:59,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:24:59,155 INFO L85 PathProgramCache]: Analyzing trace with hash -849455661, now seen corresponding path program 5 times [2024-06-27 20:24:59,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:24:59,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599382695] [2024-06-27 20:24:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:24:59,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:24:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:00,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:00,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599382695] [2024-06-27 20:25:00,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599382695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:00,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:00,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965573705] [2024-06-27 20:25:00,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:00,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:00,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:00,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:25:00,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 339 transitions, 3455 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:00,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:00,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:25:00,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:00,918 INFO L124 PetriNetUnfolderBase]: 2378/3871 cut-off events. [2024-06-27 20:25:00,918 INFO L125 PetriNetUnfolderBase]: For 655897/655925 co-relation queries the response was YES. [2024-06-27 20:25:00,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39044 conditions, 3871 events. 2378/3871 cut-off events. For 655897/655925 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22787 event pairs, 613 based on Foata normal form. 10/3818 useless extension candidates. Maximal degree in co-relation 38916. Up to 3394 conditions per place. [2024-06-27 20:25:00,968 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 74 changer transitions 0/351 dead transitions. [2024-06-27 20:25:00,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 351 transitions, 4101 flow [2024-06-27 20:25:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:25:00,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:25:00,969 INFO L175 Difference]: Start difference. First operand has 278 places, 339 transitions, 3455 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:25:00,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 351 transitions, 4101 flow [2024-06-27 20:25:02,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 351 transitions, 3824 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:02,156 INFO L231 Difference]: Finished difference. Result has 281 places, 339 transitions, 3332 flow [2024-06-27 20:25:02,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3332, PETRI_PLACES=281, PETRI_TRANSITIONS=339} [2024-06-27 20:25:02,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-27 20:25:02,156 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 339 transitions, 3332 flow [2024-06-27 20:25:02,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:02,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:02,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:02,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:25:02,157 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)] === [2024-06-27 20:25:02,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:02,157 INFO L85 PathProgramCache]: Analyzing trace with hash 385331353, now seen corresponding path program 1 times [2024-06-27 20:25:02,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:02,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532014952] [2024-06-27 20:25:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:02,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:02,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532014952] [2024-06-27 20:25:02,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532014952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:02,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:02,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:02,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893978582] [2024-06-27 20:25:02,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:02,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:02,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:02,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:02,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:03,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:25:03,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 339 transitions, 3332 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:03,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:03,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:25:03,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:03,974 INFO L124 PetriNetUnfolderBase]: 2373/3934 cut-off events. [2024-06-27 20:25:03,974 INFO L125 PetriNetUnfolderBase]: For 672595/672597 co-relation queries the response was YES. [2024-06-27 20:25:04,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39582 conditions, 3934 events. 2373/3934 cut-off events. For 672595/672597 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23741 event pairs, 546 based on Foata normal form. 2/3920 useless extension candidates. Maximal degree in co-relation 39453. Up to 3448 conditions per place. [2024-06-27 20:25:04,019 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 15 changer transitions 0/363 dead transitions. [2024-06-27 20:25:04,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 363 transitions, 4130 flow [2024-06-27 20:25:04,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:04,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:25:04,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:25:04,020 INFO L175 Difference]: Start difference. First operand has 281 places, 339 transitions, 3332 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:25:04,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 363 transitions, 4130 flow [2024-06-27 20:25:05,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 363 transitions, 3930 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:25:05,177 INFO L231 Difference]: Finished difference. Result has 280 places, 341 transitions, 3249 flow [2024-06-27 20:25:05,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3249, PETRI_PLACES=280, PETRI_TRANSITIONS=341} [2024-06-27 20:25:05,177 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 20:25:05,177 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 341 transitions, 3249 flow [2024-06-27 20:25:05,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:05,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:05,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:05,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:25:05,178 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)] === [2024-06-27 20:25:05,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:05,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1212682073, now seen corresponding path program 2 times [2024-06-27 20:25:05,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:05,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043460153] [2024-06-27 20:25:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:05,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:05,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:05,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043460153] [2024-06-27 20:25:05,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043460153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:05,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:05,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:05,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215223915] [2024-06-27 20:25:05,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:05,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:05,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:06,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:25:06,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 341 transitions, 3249 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:06,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:06,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:25:06,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:06,973 INFO L124 PetriNetUnfolderBase]: 2382/3949 cut-off events. [2024-06-27 20:25:06,974 INFO L125 PetriNetUnfolderBase]: For 687016/687018 co-relation queries the response was YES. [2024-06-27 20:25:07,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39861 conditions, 3949 events. 2382/3949 cut-off events. For 687016/687018 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 23886 event pairs, 582 based on Foata normal form. 2/3931 useless extension candidates. Maximal degree in co-relation 39731. Up to 3478 conditions per place. [2024-06-27 20:25:07,026 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 310 selfloop transitions, 16 changer transitions 0/361 dead transitions. [2024-06-27 20:25:07,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 361 transitions, 4035 flow [2024-06-27 20:25:07,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:25:07,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:25:07,027 INFO L175 Difference]: Start difference. First operand has 280 places, 341 transitions, 3249 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:25:07,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 361 transitions, 4035 flow [2024-06-27 20:25:08,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 361 transitions, 3934 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:08,135 INFO L231 Difference]: Finished difference. Result has 282 places, 343 transitions, 3271 flow [2024-06-27 20:25:08,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3271, PETRI_PLACES=282, PETRI_TRANSITIONS=343} [2024-06-27 20:25:08,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 20:25:08,136 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 343 transitions, 3271 flow [2024-06-27 20:25:08,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:08,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:08,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:08,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:25:08,137 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)] === [2024-06-27 20:25:08,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash 388193273, now seen corresponding path program 1 times [2024-06-27 20:25:08,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:08,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181954034] [2024-06-27 20:25:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:09,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:09,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181954034] [2024-06-27 20:25:09,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181954034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:09,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:09,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:09,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898684980] [2024-06-27 20:25:09,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:09,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:09,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:09,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:09,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:09,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:25:09,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 343 transitions, 3271 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:09,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:09,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:25:09,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:09,952 INFO L124 PetriNetUnfolderBase]: 2448/4017 cut-off events. [2024-06-27 20:25:09,952 INFO L125 PetriNetUnfolderBase]: For 690813/690815 co-relation queries the response was YES. [2024-06-27 20:25:09,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40032 conditions, 4017 events. 2448/4017 cut-off events. For 690813/690815 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23901 event pairs, 610 based on Foata normal form. 2/4003 useless extension candidates. Maximal degree in co-relation 39901. Up to 3670 conditions per place. [2024-06-27 20:25:10,001 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 20 changer transitions 0/364 dead transitions. [2024-06-27 20:25:10,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 364 transitions, 4131 flow [2024-06-27 20:25:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:10,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:25:10,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:25:10,003 INFO L175 Difference]: Start difference. First operand has 282 places, 343 transitions, 3271 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:25:10,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 364 transitions, 4131 flow [2024-06-27 20:25:11,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 364 transitions, 4024 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:11,185 INFO L231 Difference]: Finished difference. Result has 285 places, 346 transitions, 3318 flow [2024-06-27 20:25:11,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3318, PETRI_PLACES=285, PETRI_TRANSITIONS=346} [2024-06-27 20:25:11,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 20:25:11,186 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 346 transitions, 3318 flow [2024-06-27 20:25:11,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:11,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:11,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:11,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:25:11,187 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)] === [2024-06-27 20:25:11,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash 503479483, now seen corresponding path program 3 times [2024-06-27 20:25:11,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:11,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679090844] [2024-06-27 20:25:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:11,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:12,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:12,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679090844] [2024-06-27 20:25:12,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679090844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:12,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:12,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:12,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480310229] [2024-06-27 20:25:12,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:12,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:12,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:12,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:25:12,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 346 transitions, 3318 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:12,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:12,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:25:12,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:13,281 INFO L124 PetriNetUnfolderBase]: 2384/3953 cut-off events. [2024-06-27 20:25:13,281 INFO L125 PetriNetUnfolderBase]: For 708940/708942 co-relation queries the response was YES. [2024-06-27 20:25:13,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40154 conditions, 3953 events. 2384/3953 cut-off events. For 708940/708942 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23885 event pairs, 576 based on Foata normal form. 2/3931 useless extension candidates. Maximal degree in co-relation 40022. Up to 3477 conditions per place. [2024-06-27 20:25:13,326 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 310 selfloop transitions, 21 changer transitions 0/366 dead transitions. [2024-06-27 20:25:13,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 366 transitions, 4137 flow [2024-06-27 20:25:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:25:13,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:25:13,327 INFO L175 Difference]: Start difference. First operand has 285 places, 346 transitions, 3318 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:25:13,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 366 transitions, 4137 flow [2024-06-27 20:25:14,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 366 transitions, 4005 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:14,428 INFO L231 Difference]: Finished difference. Result has 287 places, 351 transitions, 3362 flow [2024-06-27 20:25:14,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3362, PETRI_PLACES=287, PETRI_TRANSITIONS=351} [2024-06-27 20:25:14,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 20:25:14,429 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 351 transitions, 3362 flow [2024-06-27 20:25:14,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:14,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:14,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:14,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:25:14,429 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)] === [2024-06-27 20:25:14,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1071821637, now seen corresponding path program 4 times [2024-06-27 20:25:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:14,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421350388] [2024-06-27 20:25:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:15,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421350388] [2024-06-27 20:25:15,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421350388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:15,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:15,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:25:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211095287] [2024-06-27 20:25:15,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:15,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:25:15,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:25:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:25:15,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:25:15,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 351 transitions, 3362 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:15,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:15,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:25:15,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:16,396 INFO L124 PetriNetUnfolderBase]: 2379/3946 cut-off events. [2024-06-27 20:25:16,396 INFO L125 PetriNetUnfolderBase]: For 714602/714607 co-relation queries the response was YES. [2024-06-27 20:25:16,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40218 conditions, 3946 events. 2379/3946 cut-off events. For 714602/714607 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 23841 event pairs, 579 based on Foata normal form. 2/3918 useless extension candidates. Maximal degree in co-relation 40084. Up to 3461 conditions per place. [2024-06-27 20:25:16,447 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 305 selfloop transitions, 28 changer transitions 0/368 dead transitions. [2024-06-27 20:25:16,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 368 transitions, 4181 flow [2024-06-27 20:25:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:25:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:25:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:25:16,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:25:16,448 INFO L175 Difference]: Start difference. First operand has 287 places, 351 transitions, 3362 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:25:16,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 368 transitions, 4181 flow [2024-06-27 20:25:17,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 368 transitions, 4064 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 20:25:17,494 INFO L231 Difference]: Finished difference. Result has 292 places, 356 transitions, 3437 flow [2024-06-27 20:25:17,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3437, PETRI_PLACES=292, PETRI_TRANSITIONS=356} [2024-06-27 20:25:17,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-27 20:25:17,495 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 356 transitions, 3437 flow [2024-06-27 20:25:17,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:17,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:17,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:17,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:25:17,495 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)] === [2024-06-27 20:25:17,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash -835153997, now seen corresponding path program 1 times [2024-06-27 20:25:17,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:17,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890602236] [2024-06-27 20:25:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:17,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:18,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:18,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890602236] [2024-06-27 20:25:18,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890602236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:18,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:18,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:25:18,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540033658] [2024-06-27 20:25:18,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:18,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:25:18,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:25:18,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:25:18,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:25:18,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 356 transitions, 3437 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:18,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:18,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:25:18,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:19,749 INFO L124 PetriNetUnfolderBase]: 2376/3895 cut-off events. [2024-06-27 20:25:19,750 INFO L125 PetriNetUnfolderBase]: For 716260/716282 co-relation queries the response was YES. [2024-06-27 20:25:19,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39894 conditions, 3895 events. 2376/3895 cut-off events. For 716260/716282 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 23075 event pairs, 600 based on Foata normal form. 10/3856 useless extension candidates. Maximal degree in co-relation 39758. Up to 3488 conditions per place. [2024-06-27 20:25:19,802 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 22 changer transitions 0/372 dead transitions. [2024-06-27 20:25:19,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 372 transitions, 4211 flow [2024-06-27 20:25:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:25:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:25:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 20:25:19,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:25:19,803 INFO L175 Difference]: Start difference. First operand has 292 places, 356 transitions, 3437 flow. Second operand 10 states and 170 transitions. [2024-06-27 20:25:19,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 372 transitions, 4211 flow [2024-06-27 20:25:21,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 372 transitions, 4064 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 20:25:21,026 INFO L231 Difference]: Finished difference. Result has 297 places, 358 transitions, 3425 flow [2024-06-27 20:25:21,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3425, PETRI_PLACES=297, PETRI_TRANSITIONS=358} [2024-06-27 20:25:21,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-27 20:25:21,026 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 358 transitions, 3425 flow [2024-06-27 20:25:21,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:21,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:21,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:21,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:25:21,027 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)] === [2024-06-27 20:25:21,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:21,027 INFO L85 PathProgramCache]: Analyzing trace with hash -338889165, now seen corresponding path program 1 times [2024-06-27 20:25:21,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:21,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195518151] [2024-06-27 20:25:21,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:21,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:21,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:21,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195518151] [2024-06-27 20:25:21,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195518151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:21,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:21,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:21,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764558166] [2024-06-27 20:25:21,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:21,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:21,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:21,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:25:21,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 358 transitions, 3425 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:21,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:21,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:25:21,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:22,961 INFO L124 PetriNetUnfolderBase]: 2584/4162 cut-off events. [2024-06-27 20:25:22,961 INFO L125 PetriNetUnfolderBase]: For 733472/733476 co-relation queries the response was YES. [2024-06-27 20:25:22,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41817 conditions, 4162 events. 2584/4162 cut-off events. For 733472/733476 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24231 event pairs, 505 based on Foata normal form. 6/4166 useless extension candidates. Maximal degree in co-relation 41680. Up to 3824 conditions per place. [2024-06-27 20:25:23,009 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 26 changer transitions 0/390 dead transitions. [2024-06-27 20:25:23,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 390 transitions, 4347 flow [2024-06-27 20:25:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:25:23,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:25:23,011 INFO L175 Difference]: Start difference. First operand has 297 places, 358 transitions, 3425 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:25:23,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 390 transitions, 4347 flow [2024-06-27 20:25:24,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 390 transitions, 4228 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-27 20:25:24,458 INFO L231 Difference]: Finished difference. Result has 298 places, 360 transitions, 3427 flow [2024-06-27 20:25:24,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3427, PETRI_PLACES=298, PETRI_TRANSITIONS=360} [2024-06-27 20:25:24,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-27 20:25:24,458 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 360 transitions, 3427 flow [2024-06-27 20:25:24,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:24,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:24,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:24,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:25:24,459 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)] === [2024-06-27 20:25:24,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1751715759, now seen corresponding path program 2 times [2024-06-27 20:25:24,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:24,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856619478] [2024-06-27 20:25:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:24,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:25,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:25,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856619478] [2024-06-27 20:25:25,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856619478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:25,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:25,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:25,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050690088] [2024-06-27 20:25:25,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:25,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:25,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:25,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:25,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:25,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:25:25,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 360 transitions, 3427 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:25,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:25,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:25:25,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:26,355 INFO L124 PetriNetUnfolderBase]: 2597/4194 cut-off events. [2024-06-27 20:25:26,355 INFO L125 PetriNetUnfolderBase]: For 745695/745699 co-relation queries the response was YES. [2024-06-27 20:25:26,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42185 conditions, 4194 events. 2597/4194 cut-off events. For 745695/745699 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24548 event pairs, 632 based on Foata normal form. 6/4198 useless extension candidates. Maximal degree in co-relation 42047. Up to 3885 conditions per place. [2024-06-27 20:25:26,410 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 357 selfloop transitions, 28 changer transitions 0/390 dead transitions. [2024-06-27 20:25:26,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 390 transitions, 4364 flow [2024-06-27 20:25:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:25:26,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:25:26,412 INFO L175 Difference]: Start difference. First operand has 298 places, 360 transitions, 3427 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:25:26,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 390 transitions, 4364 flow [2024-06-27 20:25:28,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 390 transitions, 4259 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:28,135 INFO L231 Difference]: Finished difference. Result has 301 places, 365 transitions, 3486 flow [2024-06-27 20:25:28,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3486, PETRI_PLACES=301, PETRI_TRANSITIONS=365} [2024-06-27 20:25:28,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-27 20:25:28,136 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 365 transitions, 3486 flow [2024-06-27 20:25:28,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:28,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:28,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:28,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:25:28,136 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)] === [2024-06-27 20:25:28,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:28,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1493437089, now seen corresponding path program 3 times [2024-06-27 20:25:28,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:28,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337603547] [2024-06-27 20:25:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337603547] [2024-06-27 20:25:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337603547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:29,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:29,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:29,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809403595] [2024-06-27 20:25:29,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:29,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:29,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:29,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:25:29,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 365 transitions, 3486 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:29,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:29,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:25:29,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:30,168 INFO L124 PetriNetUnfolderBase]: 2605/4206 cut-off events. [2024-06-27 20:25:30,168 INFO L125 PetriNetUnfolderBase]: For 760323/760327 co-relation queries the response was YES. [2024-06-27 20:25:30,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42496 conditions, 4206 events. 2605/4206 cut-off events. For 760323/760327 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24608 event pairs, 630 based on Foata normal form. 6/4210 useless extension candidates. Maximal degree in co-relation 42356. Up to 3883 conditions per place. [2024-06-27 20:25:30,223 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 357 selfloop transitions, 31 changer transitions 0/393 dead transitions. [2024-06-27 20:25:30,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 393 transitions, 4410 flow [2024-06-27 20:25:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:25:30,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:25:30,224 INFO L175 Difference]: Start difference. First operand has 301 places, 365 transitions, 3486 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:25:30,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 393 transitions, 4410 flow [2024-06-27 20:25:32,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 393 transitions, 4297 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:32,054 INFO L231 Difference]: Finished difference. Result has 304 places, 367 transitions, 3512 flow [2024-06-27 20:25:32,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3512, PETRI_PLACES=304, PETRI_TRANSITIONS=367} [2024-06-27 20:25:32,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-27 20:25:32,055 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 367 transitions, 3512 flow [2024-06-27 20:25:32,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:32,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:32,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:32,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:25:32,055 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)] === [2024-06-27 20:25:32,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash -844218753, now seen corresponding path program 1 times [2024-06-27 20:25:32,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:32,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898133801] [2024-06-27 20:25:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:32,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:32,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:32,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898133801] [2024-06-27 20:25:32,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898133801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:32,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:32,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:32,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822954652] [2024-06-27 20:25:32,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:32,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:32,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:32,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:33,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:25:33,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 367 transitions, 3512 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:33,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:33,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:25:33,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:34,138 INFO L124 PetriNetUnfolderBase]: 2534/4137 cut-off events. [2024-06-27 20:25:34,138 INFO L125 PetriNetUnfolderBase]: For 771955/771959 co-relation queries the response was YES. [2024-06-27 20:25:34,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42381 conditions, 4137 events. 2534/4137 cut-off events. For 771955/771959 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24652 event pairs, 601 based on Foata normal form. 5/4128 useless extension candidates. Maximal degree in co-relation 42240. Up to 3661 conditions per place. [2024-06-27 20:25:34,185 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 333 selfloop transitions, 34 changer transitions 0/400 dead transitions. [2024-06-27 20:25:34,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 400 transitions, 4488 flow [2024-06-27 20:25:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:25:34,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 20:25:34,187 INFO L175 Difference]: Start difference. First operand has 304 places, 367 transitions, 3512 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:25:34,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 400 transitions, 4488 flow [2024-06-27 20:25:35,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 400 transitions, 4365 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:35,848 INFO L231 Difference]: Finished difference. Result has 306 places, 370 transitions, 3616 flow [2024-06-27 20:25:35,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3616, PETRI_PLACES=306, PETRI_TRANSITIONS=370} [2024-06-27 20:25:35,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-27 20:25:35,849 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 370 transitions, 3616 flow [2024-06-27 20:25:35,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:35,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:35,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:35,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:25:35,850 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)] === [2024-06-27 20:25:35,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:35,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1670476353, now seen corresponding path program 1 times [2024-06-27 20:25:35,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:35,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253931166] [2024-06-27 20:25:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:35,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:36,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:36,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253931166] [2024-06-27 20:25:36,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253931166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:36,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:36,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:36,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912819657] [2024-06-27 20:25:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:36,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:36,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:36,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:25:36,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 370 transitions, 3616 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:36,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:36,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:25:36,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:37,780 INFO L124 PetriNetUnfolderBase]: 2620/4227 cut-off events. [2024-06-27 20:25:37,780 INFO L125 PetriNetUnfolderBase]: For 794921/794925 co-relation queries the response was YES. [2024-06-27 20:25:37,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43444 conditions, 4227 events. 2620/4227 cut-off events. For 794921/794925 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 24728 event pairs, 630 based on Foata normal form. 6/4231 useless extension candidates. Maximal degree in co-relation 43302. Up to 3895 conditions per place. [2024-06-27 20:25:37,836 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 366 selfloop transitions, 31 changer transitions 0/402 dead transitions. [2024-06-27 20:25:37,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 402 transitions, 4640 flow [2024-06-27 20:25:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:25:37,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:25:37,837 INFO L175 Difference]: Start difference. First operand has 306 places, 370 transitions, 3616 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:25:37,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 402 transitions, 4640 flow [2024-06-27 20:25:39,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 402 transitions, 4431 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:39,650 INFO L231 Difference]: Finished difference. Result has 308 places, 373 transitions, 3601 flow [2024-06-27 20:25:39,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3407, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3601, PETRI_PLACES=308, PETRI_TRANSITIONS=373} [2024-06-27 20:25:39,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-27 20:25:39,651 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 373 transitions, 3601 flow [2024-06-27 20:25:39,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:39,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:39,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:39,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:25:39,652 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)] === [2024-06-27 20:25:39,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1493344833, now seen corresponding path program 2 times [2024-06-27 20:25:39,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:39,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327370877] [2024-06-27 20:25:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:39,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:40,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:40,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327370877] [2024-06-27 20:25:40,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327370877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:40,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:40,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:40,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054687766] [2024-06-27 20:25:40,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:40,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:40,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:40,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:40,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:25:40,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 373 transitions, 3601 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:40,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:40,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:25:40,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:41,573 INFO L124 PetriNetUnfolderBase]: 2646/4265 cut-off events. [2024-06-27 20:25:41,574 INFO L125 PetriNetUnfolderBase]: For 829127/829131 co-relation queries the response was YES. [2024-06-27 20:25:41,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44599 conditions, 4265 events. 2646/4265 cut-off events. For 829127/829131 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25015 event pairs, 633 based on Foata normal form. 6/4269 useless extension candidates. Maximal degree in co-relation 44456. Up to 3898 conditions per place. [2024-06-27 20:25:41,632 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 362 selfloop transitions, 44 changer transitions 0/411 dead transitions. [2024-06-27 20:25:41,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 411 transitions, 4991 flow [2024-06-27 20:25:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:25:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:25:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 20:25:41,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:25:41,634 INFO L175 Difference]: Start difference. First operand has 308 places, 373 transitions, 3601 flow. Second operand 10 states and 183 transitions. [2024-06-27 20:25:41,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 411 transitions, 4991 flow [2024-06-27 20:25:43,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 411 transitions, 4819 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-27 20:25:43,422 INFO L231 Difference]: Finished difference. Result has 311 places, 379 transitions, 3781 flow [2024-06-27 20:25:43,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3781, PETRI_PLACES=311, PETRI_TRANSITIONS=379} [2024-06-27 20:25:43,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-27 20:25:43,422 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 379 transitions, 3781 flow [2024-06-27 20:25:43,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:43,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:43,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:43,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:25:43,423 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)] === [2024-06-27 20:25:43,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:43,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1493107683, now seen corresponding path program 3 times [2024-06-27 20:25:43,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:43,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837786841] [2024-06-27 20:25:43,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:43,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:44,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837786841] [2024-06-27 20:25:44,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837786841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:44,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:44,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:44,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838023784] [2024-06-27 20:25:44,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:44,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:44,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:44,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:44,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:25:44,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 379 transitions, 3781 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:44,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:44,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:25:44,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:45,450 INFO L124 PetriNetUnfolderBase]: 2640/4257 cut-off events. [2024-06-27 20:25:45,450 INFO L125 PetriNetUnfolderBase]: For 840522/840526 co-relation queries the response was YES. [2024-06-27 20:25:45,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44707 conditions, 4257 events. 2640/4257 cut-off events. For 840522/840526 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 24954 event pairs, 630 based on Foata normal form. 6/4261 useless extension candidates. Maximal degree in co-relation 44563. Up to 3893 conditions per place. [2024-06-27 20:25:45,507 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 360 selfloop transitions, 45 changer transitions 0/410 dead transitions. [2024-06-27 20:25:45,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 410 transitions, 4715 flow [2024-06-27 20:25:45,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:25:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:25:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:25:45,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 20:25:45,508 INFO L175 Difference]: Start difference. First operand has 311 places, 379 transitions, 3781 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:25:45,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 410 transitions, 4715 flow [2024-06-27 20:25:47,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 410 transitions, 4436 flow, removed 116 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:47,411 INFO L231 Difference]: Finished difference. Result has 315 places, 379 transitions, 3598 flow [2024-06-27 20:25:47,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3502, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3598, PETRI_PLACES=315, PETRI_TRANSITIONS=379} [2024-06-27 20:25:47,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 20:25:47,412 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 379 transitions, 3598 flow [2024-06-27 20:25:47,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:47,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:47,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:47,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:25:47,413 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)] === [2024-06-27 20:25:47,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:47,413 INFO L85 PathProgramCache]: Analyzing trace with hash 637858323, now seen corresponding path program 4 times [2024-06-27 20:25:47,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:47,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111542738] [2024-06-27 20:25:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:47,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:48,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:48,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111542738] [2024-06-27 20:25:48,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111542738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:48,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:48,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:48,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877829660] [2024-06-27 20:25:48,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:48,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:48,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:48,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:48,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:48,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:25:48,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 379 transitions, 3598 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:48,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:48,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:25:48,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:49,312 INFO L124 PetriNetUnfolderBase]: 2653/4276 cut-off events. [2024-06-27 20:25:49,312 INFO L125 PetriNetUnfolderBase]: For 852675/852677 co-relation queries the response was YES. [2024-06-27 20:25:49,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44846 conditions, 4276 events. 2653/4276 cut-off events. For 852675/852677 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25092 event pairs, 640 based on Foata normal form. 2/4276 useless extension candidates. Maximal degree in co-relation 44700. Up to 3948 conditions per place. [2024-06-27 20:25:49,372 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 39 changer transitions 0/402 dead transitions. [2024-06-27 20:25:49,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 402 transitions, 4549 flow [2024-06-27 20:25:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:25:49,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 20:25:49,373 INFO L175 Difference]: Start difference. First operand has 315 places, 379 transitions, 3598 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:25:49,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 402 transitions, 4549 flow [2024-06-27 20:25:51,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 402 transitions, 4447 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:25:51,513 INFO L231 Difference]: Finished difference. Result has 315 places, 384 transitions, 3690 flow [2024-06-27 20:25:51,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3690, PETRI_PLACES=315, PETRI_TRANSITIONS=384} [2024-06-27 20:25:51,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 20:25:51,514 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 384 transitions, 3690 flow [2024-06-27 20:25:51,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:51,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:51,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:51,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:25:51,515 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)] === [2024-06-27 20:25:51,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:51,515 INFO L85 PathProgramCache]: Analyzing trace with hash 637531893, now seen corresponding path program 5 times [2024-06-27 20:25:51,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:51,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217711427] [2024-06-27 20:25:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:51,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:52,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217711427] [2024-06-27 20:25:52,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217711427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:52,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:52,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:52,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931193256] [2024-06-27 20:25:52,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:52,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:52,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:52,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:25:52,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 384 transitions, 3690 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:52,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:52,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:25:52,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:53,451 INFO L124 PetriNetUnfolderBase]: 2674/4307 cut-off events. [2024-06-27 20:25:53,451 INFO L125 PetriNetUnfolderBase]: For 880577/880579 co-relation queries the response was YES. [2024-06-27 20:25:53,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45692 conditions, 4307 events. 2674/4307 cut-off events. For 880577/880579 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25294 event pairs, 639 based on Foata normal form. 2/4307 useless extension candidates. Maximal degree in co-relation 45545. Up to 3956 conditions per place. [2024-06-27 20:25:53,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 44 changer transitions 0/408 dead transitions. [2024-06-27 20:25:53,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 408 transitions, 4916 flow [2024-06-27 20:25:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:25:53,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:25:53,511 INFO L175 Difference]: Start difference. First operand has 315 places, 384 transitions, 3690 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:25:53,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 408 transitions, 4916 flow [2024-06-27 20:25:55,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 408 transitions, 4752 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:25:55,710 INFO L231 Difference]: Finished difference. Result has 318 places, 388 transitions, 3783 flow [2024-06-27 20:25:55,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3783, PETRI_PLACES=318, PETRI_TRANSITIONS=388} [2024-06-27 20:25:55,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 20:25:55,711 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 388 transitions, 3783 flow [2024-06-27 20:25:55,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:55,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:25:55,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:25:55,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:25:55,711 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)] === [2024-06-27 20:25:55,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:25:55,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1178813261, now seen corresponding path program 6 times [2024-06-27 20:25:55,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:25:55,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267867840] [2024-06-27 20:25:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:25:55,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:25:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:25:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:25:56,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:25:56,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267867840] [2024-06-27 20:25:56,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267867840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:25:56,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:25:56,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:25:56,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505510286] [2024-06-27 20:25:56,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:25:56,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:25:56,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:25:56,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:25:56,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:25:56,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:25:56,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 388 transitions, 3783 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:25:56,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:25:56,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:25:56,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:25:57,829 INFO L124 PetriNetUnfolderBase]: 2669/4300 cut-off events. [2024-06-27 20:25:57,829 INFO L125 PetriNetUnfolderBase]: For 885040/885042 co-relation queries the response was YES. [2024-06-27 20:25:57,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45488 conditions, 4300 events. 2669/4300 cut-off events. For 885040/885042 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25242 event pairs, 640 based on Foata normal form. 2/4300 useless extension candidates. Maximal degree in co-relation 45342. Up to 3972 conditions per place. [2024-06-27 20:25:57,881 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 361 selfloop transitions, 40 changer transitions 0/406 dead transitions. [2024-06-27 20:25:57,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 406 transitions, 4635 flow [2024-06-27 20:25:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:25:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:25:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:25:57,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:25:57,883 INFO L175 Difference]: Start difference. First operand has 318 places, 388 transitions, 3783 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:25:57,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 406 transitions, 4635 flow [2024-06-27 20:26:00,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 406 transitions, 4444 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:00,131 INFO L231 Difference]: Finished difference. Result has 322 places, 388 transitions, 3677 flow [2024-06-27 20:26:00,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3677, PETRI_PLACES=322, PETRI_TRANSITIONS=388} [2024-06-27 20:26:00,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 20:26:00,132 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 388 transitions, 3677 flow [2024-06-27 20:26:00,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:00,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:00,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:00,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:26:00,132 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)] === [2024-06-27 20:26:00,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:00,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1908792141, now seen corresponding path program 2 times [2024-06-27 20:26:00,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:00,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712699136] [2024-06-27 20:26:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:00,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:00,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:00,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712699136] [2024-06-27 20:26:00,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712699136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:00,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:00,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489071239] [2024-06-27 20:26:00,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:00,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:01,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:01,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 388 transitions, 3677 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:01,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:01,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:01,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:02,293 INFO L124 PetriNetUnfolderBase]: 2603/4248 cut-off events. [2024-06-27 20:26:02,294 INFO L125 PetriNetUnfolderBase]: For 895519/895524 co-relation queries the response was YES. [2024-06-27 20:26:02,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45219 conditions, 4248 events. 2603/4248 cut-off events. For 895519/895524 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25457 event pairs, 618 based on Foata normal form. 1/4233 useless extension candidates. Maximal degree in co-relation 45071. Up to 3618 conditions per place. [2024-06-27 20:26:02,360 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 63 changer transitions 0/420 dead transitions. [2024-06-27 20:26:02,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 420 transitions, 4701 flow [2024-06-27 20:26:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 20:26:02,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-27 20:26:02,361 INFO L175 Difference]: Start difference. First operand has 322 places, 388 transitions, 3677 flow. Second operand 9 states and 177 transitions. [2024-06-27 20:26:02,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 420 transitions, 4701 flow [2024-06-27 20:26:04,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 420 transitions, 4603 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:26:04,239 INFO L231 Difference]: Finished difference. Result has 323 places, 394 transitions, 3903 flow [2024-06-27 20:26:04,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3903, PETRI_PLACES=323, PETRI_TRANSITIONS=394} [2024-06-27 20:26:04,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-27 20:26:04,240 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 394 transitions, 3903 flow [2024-06-27 20:26:04,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:04,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:04,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:04,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:26:04,240 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)] === [2024-06-27 20:26:04,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1909090671, now seen corresponding path program 3 times [2024-06-27 20:26:04,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:04,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807136251] [2024-06-27 20:26:04,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:04,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:05,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:05,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807136251] [2024-06-27 20:26:05,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807136251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:05,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:05,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:05,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706010402] [2024-06-27 20:26:05,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:05,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:05,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:05,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:05,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:05,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:05,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 394 transitions, 3903 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:05,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:05,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:05,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:06,219 INFO L124 PetriNetUnfolderBase]: 2616/4266 cut-off events. [2024-06-27 20:26:06,219 INFO L125 PetriNetUnfolderBase]: For 927589/927594 co-relation queries the response was YES. [2024-06-27 20:26:06,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46399 conditions, 4266 events. 2616/4266 cut-off events. For 927589/927594 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25537 event pairs, 618 based on Foata normal form. 1/4251 useless extension candidates. Maximal degree in co-relation 46250. Up to 3621 conditions per place. [2024-06-27 20:26:06,280 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 74 changer transitions 0/424 dead transitions. [2024-06-27 20:26:06,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 424 transitions, 5285 flow [2024-06-27 20:26:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:06,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:26:06,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 20:26:06,281 INFO L175 Difference]: Start difference. First operand has 323 places, 394 transitions, 3903 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:26:06,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 424 transitions, 5285 flow [2024-06-27 20:26:08,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 424 transitions, 5011 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:08,982 INFO L231 Difference]: Finished difference. Result has 326 places, 400 transitions, 4121 flow [2024-06-27 20:26:08,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3629, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4121, PETRI_PLACES=326, PETRI_TRANSITIONS=400} [2024-06-27 20:26:08,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 20:26:08,983 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 400 transitions, 4121 flow [2024-06-27 20:26:08,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:08,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:08,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:08,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:26:08,983 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)] === [2024-06-27 20:26:08,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1909091043, now seen corresponding path program 1 times [2024-06-27 20:26:08,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:08,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44732429] [2024-06-27 20:26:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:08,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:09,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:09,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44732429] [2024-06-27 20:26:09,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44732429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:09,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:09,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:09,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625870149] [2024-06-27 20:26:09,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:09,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:09,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:09,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:09,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:09,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:09,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 400 transitions, 4121 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:09,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:09,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:09,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:10,956 INFO L124 PetriNetUnfolderBase]: 2703/4357 cut-off events. [2024-06-27 20:26:10,956 INFO L125 PetriNetUnfolderBase]: For 947108/947115 co-relation queries the response was YES. [2024-06-27 20:26:10,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47416 conditions, 4357 events. 2703/4357 cut-off events. For 947108/947115 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25651 event pairs, 643 based on Foata normal form. 5/4358 useless extension candidates. Maximal degree in co-relation 47266. Up to 4010 conditions per place. [2024-06-27 20:26:11,016 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 35 changer transitions 0/428 dead transitions. [2024-06-27 20:26:11,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 428 transitions, 5171 flow [2024-06-27 20:26:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:26:11,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:26:11,017 INFO L175 Difference]: Start difference. First operand has 326 places, 400 transitions, 4121 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:26:11,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 428 transitions, 5171 flow [2024-06-27 20:26:13,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 428 transitions, 4908 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:13,904 INFO L231 Difference]: Finished difference. Result has 330 places, 403 transitions, 4064 flow [2024-06-27 20:26:13,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4064, PETRI_PLACES=330, PETRI_TRANSITIONS=403} [2024-06-27 20:26:13,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-27 20:26:13,904 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 403 transitions, 4064 flow [2024-06-27 20:26:13,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:13,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:13,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:13,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:26:13,905 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)] === [2024-06-27 20:26:13,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:13,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1903429761, now seen corresponding path program 4 times [2024-06-27 20:26:13,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:13,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941048537] [2024-06-27 20:26:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:13,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:14,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:14,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941048537] [2024-06-27 20:26:14,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941048537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:14,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:14,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527665563] [2024-06-27 20:26:14,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:14,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:14,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:14,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:14,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 403 transitions, 4064 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:14,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:14,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:14,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:15,883 INFO L124 PetriNetUnfolderBase]: 2618/4269 cut-off events. [2024-06-27 20:26:15,883 INFO L125 PetriNetUnfolderBase]: For 960061/960066 co-relation queries the response was YES. [2024-06-27 20:26:15,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47085 conditions, 4269 events. 2618/4269 cut-off events. For 960061/960066 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25535 event pairs, 617 based on Foata normal form. 1/4254 useless extension candidates. Maximal degree in co-relation 46933. Up to 3637 conditions per place. [2024-06-27 20:26:15,942 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 62 changer transitions 0/429 dead transitions. [2024-06-27 20:26:15,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 429 transitions, 4918 flow [2024-06-27 20:26:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:26:15,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-27 20:26:15,943 INFO L175 Difference]: Start difference. First operand has 330 places, 403 transitions, 4064 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:26:15,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 429 transitions, 4918 flow [2024-06-27 20:26:19,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 429 transitions, 4626 flow, removed 113 selfloop flow, removed 7 redundant places. [2024-06-27 20:26:19,661 INFO L231 Difference]: Finished difference. Result has 332 places, 403 transitions, 3902 flow [2024-06-27 20:26:19,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3902, PETRI_PLACES=332, PETRI_TRANSITIONS=403} [2024-06-27 20:26:19,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 20:26:19,662 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 403 transitions, 3902 flow [2024-06-27 20:26:19,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:19,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:19,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:19,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:26:19,662 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)] === [2024-06-27 20:26:19,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:19,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1903549917, now seen corresponding path program 4 times [2024-06-27 20:26:19,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:19,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328346371] [2024-06-27 20:26:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:19,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:20,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:20,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328346371] [2024-06-27 20:26:20,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328346371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:20,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:20,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:20,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693705581] [2024-06-27 20:26:20,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:20,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:20,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:20,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:20,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:20,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:20,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 403 transitions, 3902 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:20,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:20,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:20,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:21,545 INFO L124 PetriNetUnfolderBase]: 2710/4368 cut-off events. [2024-06-27 20:26:21,545 INFO L125 PetriNetUnfolderBase]: For 980628/980633 co-relation queries the response was YES. [2024-06-27 20:26:21,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47858 conditions, 4368 events. 2710/4368 cut-off events. For 980628/980633 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25796 event pairs, 643 based on Foata normal form. 4/4369 useless extension candidates. Maximal degree in co-relation 47705. Up to 3976 conditions per place. [2024-06-27 20:26:21,607 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 384 selfloop transitions, 42 changer transitions 0/431 dead transitions. [2024-06-27 20:26:21,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 431 transitions, 4994 flow [2024-06-27 20:26:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:26:21,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:26:21,609 INFO L175 Difference]: Start difference. First operand has 332 places, 403 transitions, 3902 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:26:21,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 431 transitions, 4994 flow [2024-06-27 20:26:24,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 431 transitions, 4816 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 20:26:24,394 INFO L231 Difference]: Finished difference. Result has 332 places, 406 transitions, 3968 flow [2024-06-27 20:26:24,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3724, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3968, PETRI_PLACES=332, PETRI_TRANSITIONS=406} [2024-06-27 20:26:24,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 20:26:24,395 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 406 transitions, 3968 flow [2024-06-27 20:26:24,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:24,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:24,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:24,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:26:24,395 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)] === [2024-06-27 20:26:24,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash -314712134, now seen corresponding path program 1 times [2024-06-27 20:26:24,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:24,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625787065] [2024-06-27 20:26:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:24,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:25,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:25,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625787065] [2024-06-27 20:26:25,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625787065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:25,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:25,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033256393] [2024-06-27 20:26:25,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:25,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:25,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:25,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:25,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:25,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:25,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 406 transitions, 3968 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:25,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:25,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:25,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:26,309 INFO L124 PetriNetUnfolderBase]: 2720/4384 cut-off events. [2024-06-27 20:26:26,309 INFO L125 PetriNetUnfolderBase]: For 1003966/1003973 co-relation queries the response was YES. [2024-06-27 20:26:26,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48459 conditions, 4384 events. 2720/4384 cut-off events. For 1003966/1003973 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 25889 event pairs, 636 based on Foata normal form. 8/4389 useless extension candidates. Maximal degree in co-relation 48305. Up to 4054 conditions per place. [2024-06-27 20:26:26,370 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 28 changer transitions 0/434 dead transitions. [2024-06-27 20:26:26,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 434 transitions, 5036 flow [2024-06-27 20:26:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:26:26,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:26:26,371 INFO L175 Difference]: Start difference. First operand has 332 places, 406 transitions, 3968 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:26:26,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 434 transitions, 5036 flow [2024-06-27 20:26:29,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 434 transitions, 4814 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-27 20:26:29,843 INFO L231 Difference]: Finished difference. Result has 334 places, 409 transitions, 3918 flow [2024-06-27 20:26:29,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3918, PETRI_PLACES=334, PETRI_TRANSITIONS=409} [2024-06-27 20:26:29,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-27 20:26:29,843 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 409 transitions, 3918 flow [2024-06-27 20:26:29,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:29,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:29,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:29,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:26:29,844 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)] === [2024-06-27 20:26:29,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:29,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1912815507, now seen corresponding path program 5 times [2024-06-27 20:26:29,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:29,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091520963] [2024-06-27 20:26:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:29,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:30,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:30,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091520963] [2024-06-27 20:26:30,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091520963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:30,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:30,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:30,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669807057] [2024-06-27 20:26:30,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:30,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:30,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:30,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:30,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:30,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:30,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 409 transitions, 3918 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:30,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:30,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:30,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:31,904 INFO L124 PetriNetUnfolderBase]: 2746/4422 cut-off events. [2024-06-27 20:26:31,904 INFO L125 PetriNetUnfolderBase]: For 1025491/1025496 co-relation queries the response was YES. [2024-06-27 20:26:31,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49586 conditions, 4422 events. 2746/4422 cut-off events. For 1025491/1025496 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26041 event pairs, 638 based on Foata normal form. 4/4423 useless extension candidates. Maximal degree in co-relation 49431. Up to 3969 conditions per place. [2024-06-27 20:26:31,959 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 61 changer transitions 0/439 dead transitions. [2024-06-27 20:26:31,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 439 transitions, 5416 flow [2024-06-27 20:26:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:26:31,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:26:31,961 INFO L175 Difference]: Start difference. First operand has 334 places, 409 transitions, 3918 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:26:31,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 439 transitions, 5416 flow [2024-06-27 20:26:35,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 439 transitions, 5266 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 20:26:35,518 INFO L231 Difference]: Finished difference. Result has 336 places, 415 transitions, 4214 flow [2024-06-27 20:26:35,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3768, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4214, PETRI_PLACES=336, PETRI_TRANSITIONS=415} [2024-06-27 20:26:35,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-27 20:26:35,519 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 415 transitions, 4214 flow [2024-06-27 20:26:35,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:35,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:35,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:35,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:26:35,519 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)] === [2024-06-27 20:26:35,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash -140093593, now seen corresponding path program 6 times [2024-06-27 20:26:35,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:35,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477803356] [2024-06-27 20:26:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:35,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:36,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:36,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477803356] [2024-06-27 20:26:36,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477803356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:36,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:36,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:36,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620262167] [2024-06-27 20:26:36,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:36,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:36,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:36,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:36,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:36,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:36,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 415 transitions, 4214 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:36,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:36,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:36,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:37,556 INFO L124 PetriNetUnfolderBase]: 2740/4416 cut-off events. [2024-06-27 20:26:37,556 INFO L125 PetriNetUnfolderBase]: For 1036892/1036897 co-relation queries the response was YES. [2024-06-27 20:26:37,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49779 conditions, 4416 events. 2740/4416 cut-off events. For 1036892/1036897 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26073 event pairs, 642 based on Foata normal form. 4/4417 useless extension candidates. Maximal degree in co-relation 49623. Up to 3964 conditions per place. [2024-06-27 20:26:37,621 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 374 selfloop transitions, 59 changer transitions 0/438 dead transitions. [2024-06-27 20:26:37,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 438 transitions, 5174 flow [2024-06-27 20:26:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:26:37,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:26:37,622 INFO L175 Difference]: Start difference. First operand has 336 places, 415 transitions, 4214 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:26:37,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 438 transitions, 5174 flow [2024-06-27 20:26:41,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 438 transitions, 4842 flow, removed 137 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:41,677 INFO L231 Difference]: Finished difference. Result has 340 places, 415 transitions, 4006 flow [2024-06-27 20:26:41,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3882, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4006, PETRI_PLACES=340, PETRI_TRANSITIONS=415} [2024-06-27 20:26:41,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-27 20:26:41,678 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 415 transitions, 4006 flow [2024-06-27 20:26:41,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:41,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:41,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:41,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:26:41,678 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)] === [2024-06-27 20:26:41,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:41,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1186053125, now seen corresponding path program 7 times [2024-06-27 20:26:41,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:41,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491727473] [2024-06-27 20:26:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:41,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:42,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:42,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491727473] [2024-06-27 20:26:42,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491727473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:42,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:42,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:42,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448158985] [2024-06-27 20:26:42,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:42,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:42,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:42,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:42,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:42,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 415 transitions, 4006 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:42,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:42,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:42,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:43,691 INFO L124 PetriNetUnfolderBase]: 2798/4507 cut-off events. [2024-06-27 20:26:43,691 INFO L125 PetriNetUnfolderBase]: For 1098255/1098260 co-relation queries the response was YES. [2024-06-27 20:26:43,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51912 conditions, 4507 events. 2798/4507 cut-off events. For 1098255/1098260 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 26687 event pairs, 653 based on Foata normal form. 4/4508 useless extension candidates. Maximal degree in co-relation 51754. Up to 3878 conditions per place. [2024-06-27 20:26:43,759 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 339 selfloop transitions, 107 changer transitions 0/451 dead transitions. [2024-06-27 20:26:43,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 451 transitions, 6326 flow [2024-06-27 20:26:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:26:43,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:26:43,760 INFO L175 Difference]: Start difference. First operand has 340 places, 415 transitions, 4006 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:26:43,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 451 transitions, 6326 flow [2024-06-27 20:26:46,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 451 transitions, 6170 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 20:26:46,901 INFO L231 Difference]: Finished difference. Result has 341 places, 427 transitions, 4724 flow [2024-06-27 20:26:46,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3850, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4724, PETRI_PLACES=341, PETRI_TRANSITIONS=427} [2024-06-27 20:26:46,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-27 20:26:46,902 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 427 transitions, 4724 flow [2024-06-27 20:26:46,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:46,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:46,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:46,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:26:46,903 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)] === [2024-06-27 20:26:46,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:46,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1186041562, now seen corresponding path program 2 times [2024-06-27 20:26:46,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:46,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148307709] [2024-06-27 20:26:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:47,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:47,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148307709] [2024-06-27 20:26:47,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148307709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:47,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:47,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:47,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591551427] [2024-06-27 20:26:47,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:47,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:47,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:47,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:48,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:48,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 427 transitions, 4724 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:48,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:48,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:48,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:49,057 INFO L124 PetriNetUnfolderBase]: 2840/4564 cut-off events. [2024-06-27 20:26:49,057 INFO L125 PetriNetUnfolderBase]: For 1156215/1156222 co-relation queries the response was YES. [2024-06-27 20:26:49,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53733 conditions, 4564 events. 2840/4564 cut-off events. For 1156215/1156222 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26963 event pairs, 649 based on Foata normal form. 8/4569 useless extension candidates. Maximal degree in co-relation 53574. Up to 4143 conditions per place. [2024-06-27 20:26:49,128 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 407 selfloop transitions, 51 changer transitions 0/463 dead transitions. [2024-06-27 20:26:49,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 463 transitions, 6563 flow [2024-06-27 20:26:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:26:49,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:26:49,129 INFO L175 Difference]: Start difference. First operand has 341 places, 427 transitions, 4724 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:26:49,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 463 transitions, 6563 flow [2024-06-27 20:26:52,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 463 transitions, 6252 flow, removed 139 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:52,659 INFO L231 Difference]: Finished difference. Result has 348 places, 438 transitions, 4910 flow [2024-06-27 20:26:52,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4910, PETRI_PLACES=348, PETRI_TRANSITIONS=438} [2024-06-27 20:26:52,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 20:26:52,660 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 438 transitions, 4910 flow [2024-06-27 20:26:52,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:52,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:52,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:52,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:26:52,660 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)] === [2024-06-27 20:26:52,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:52,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1178810285, now seen corresponding path program 8 times [2024-06-27 20:26:52,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:52,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418285161] [2024-06-27 20:26:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:52,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:53,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:53,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418285161] [2024-06-27 20:26:53,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418285161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:53,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:53,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:53,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243416584] [2024-06-27 20:26:53,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:53,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:53,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:53,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:53,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:53,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:53,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 438 transitions, 4910 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:53,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:53,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:53,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:54,841 INFO L124 PetriNetUnfolderBase]: 2850/4573 cut-off events. [2024-06-27 20:26:54,841 INFO L125 PetriNetUnfolderBase]: For 1156264/1156266 co-relation queries the response was YES. [2024-06-27 20:26:54,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53434 conditions, 4573 events. 2850/4573 cut-off events. For 1156264/1156266 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 26990 event pairs, 663 based on Foata normal form. 2/4573 useless extension candidates. Maximal degree in co-relation 53272. Up to 4224 conditions per place. [2024-06-27 20:26:54,907 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 41 changer transitions 0/459 dead transitions. [2024-06-27 20:26:54,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 459 transitions, 6012 flow [2024-06-27 20:26:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:26:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:26:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:26:54,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 20:26:54,908 INFO L175 Difference]: Start difference. First operand has 348 places, 438 transitions, 4910 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:26:54,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 459 transitions, 6012 flow [2024-06-27 20:26:58,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 459 transitions, 5846 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:58,575 INFO L231 Difference]: Finished difference. Result has 353 places, 441 transitions, 4972 flow [2024-06-27 20:26:58,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4972, PETRI_PLACES=353, PETRI_TRANSITIONS=441} [2024-06-27 20:26:58,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 20:26:58,576 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 441 transitions, 4972 flow [2024-06-27 20:26:58,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:58,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:58,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:58,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:26:58,577 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)] === [2024-06-27 20:26:58,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:58,577 INFO L85 PathProgramCache]: Analyzing trace with hash -352160566, now seen corresponding path program 3 times [2024-06-27 20:26:58,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:58,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684073697] [2024-06-27 20:26:58,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:58,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:59,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:59,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684073697] [2024-06-27 20:26:59,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684073697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:59,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:59,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:26:59,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958822398] [2024-06-27 20:26:59,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:59,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:26:59,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:26:59,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:26:59,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:59,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 441 transitions, 4972 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:59,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:59,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:59,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:00,660 INFO L124 PetriNetUnfolderBase]: 2860/4590 cut-off events. [2024-06-27 20:27:00,661 INFO L125 PetriNetUnfolderBase]: For 1172474/1172481 co-relation queries the response was YES. [2024-06-27 20:27:00,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53657 conditions, 4590 events. 2860/4590 cut-off events. For 1172474/1172481 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 27096 event pairs, 639 based on Foata normal form. 8/4595 useless extension candidates. Maximal degree in co-relation 53493. Up to 4167 conditions per place. [2024-06-27 20:27:00,888 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 59 changer transitions 0/468 dead transitions. [2024-06-27 20:27:00,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 468 transitions, 6336 flow [2024-06-27 20:27:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:27:00,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:27:00,889 INFO L175 Difference]: Start difference. First operand has 353 places, 441 transitions, 4972 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:27:00,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 468 transitions, 6336 flow [2024-06-27 20:27:04,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 468 transitions, 6136 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:04,368 INFO L231 Difference]: Finished difference. Result has 355 places, 444 transitions, 4992 flow [2024-06-27 20:27:04,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4992, PETRI_PLACES=355, PETRI_TRANSITIONS=444} [2024-06-27 20:27:04,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-27 20:27:04,369 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 444 transitions, 4992 flow [2024-06-27 20:27:04,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:04,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:04,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:04,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:27:04,369 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)] === [2024-06-27 20:27:04,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1607688136, now seen corresponding path program 4 times [2024-06-27 20:27:04,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:04,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683801689] [2024-06-27 20:27:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:04,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:05,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:05,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683801689] [2024-06-27 20:27:05,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683801689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:05,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:05,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:05,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293004842] [2024-06-27 20:27:05,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:05,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:05,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:05,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:05,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:05,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:05,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 444 transitions, 4992 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:05,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:05,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:05,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:06,429 INFO L124 PetriNetUnfolderBase]: 2854/4582 cut-off events. [2024-06-27 20:27:06,429 INFO L125 PetriNetUnfolderBase]: For 1174321/1174328 co-relation queries the response was YES. [2024-06-27 20:27:06,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53406 conditions, 4582 events. 2854/4582 cut-off events. For 1174321/1174328 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27062 event pairs, 639 based on Foata normal form. 8/4587 useless extension candidates. Maximal degree in co-relation 53241. Up to 4162 conditions per place. [2024-06-27 20:27:06,498 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 407 selfloop transitions, 56 changer transitions 0/468 dead transitions. [2024-06-27 20:27:06,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 468 transitions, 6262 flow [2024-06-27 20:27:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:27:06,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:27:06,499 INFO L175 Difference]: Start difference. First operand has 355 places, 444 transitions, 4992 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:27:06,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 468 transitions, 6262 flow [2024-06-27 20:27:10,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 468 transitions, 5987 flow, removed 90 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:10,584 INFO L231 Difference]: Finished difference. Result has 358 places, 444 transitions, 4835 flow [2024-06-27 20:27:10,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4717, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4835, PETRI_PLACES=358, PETRI_TRANSITIONS=444} [2024-06-27 20:27:10,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 20:27:10,584 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 444 transitions, 4835 flow [2024-06-27 20:27:10,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:10,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:10,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:10,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:27:10,585 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)] === [2024-06-27 20:27:10,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:10,585 INFO L85 PathProgramCache]: Analyzing trace with hash 648706029, now seen corresponding path program 9 times [2024-06-27 20:27:10,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:10,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391458931] [2024-06-27 20:27:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:10,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:11,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:11,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391458931] [2024-06-27 20:27:11,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391458931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:11,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:11,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:11,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213012354] [2024-06-27 20:27:11,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:11,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:11,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:11,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:11,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:11,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 444 transitions, 4835 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:11,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:11,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:11,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:12,709 INFO L124 PetriNetUnfolderBase]: 2880/4631 cut-off events. [2024-06-27 20:27:12,709 INFO L125 PetriNetUnfolderBase]: For 1207453/1207458 co-relation queries the response was YES. [2024-06-27 20:27:12,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54162 conditions, 4631 events. 2880/4631 cut-off events. For 1207453/1207458 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27530 event pairs, 637 based on Foata normal form. 4/4632 useless extension candidates. Maximal degree in co-relation 53996. Up to 3977 conditions per place. [2024-06-27 20:27:12,782 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 344 selfloop transitions, 124 changer transitions 0/473 dead transitions. [2024-06-27 20:27:12,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 473 transitions, 6605 flow [2024-06-27 20:27:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:27:12,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 20:27:12,783 INFO L175 Difference]: Start difference. First operand has 358 places, 444 transitions, 4835 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:27:12,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 473 transitions, 6605 flow [2024-06-27 20:27:16,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 473 transitions, 6506 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:16,881 INFO L231 Difference]: Finished difference. Result has 360 places, 450 transitions, 5252 flow [2024-06-27 20:27:16,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5252, PETRI_PLACES=360, PETRI_TRANSITIONS=450} [2024-06-27 20:27:16,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-27 20:27:16,881 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 450 transitions, 5252 flow [2024-06-27 20:27:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:16,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:16,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:16,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:27:16,882 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)] === [2024-06-27 20:27:16,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1600336083, now seen corresponding path program 10 times [2024-06-27 20:27:16,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:16,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812324039] [2024-06-27 20:27:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:16,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:17,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:17,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812324039] [2024-06-27 20:27:17,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812324039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:17,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:17,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:17,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261146657] [2024-06-27 20:27:17,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:17,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:17,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:17,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:17,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:17,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 450 transitions, 5252 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:17,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:17,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:17,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:18,981 INFO L124 PetriNetUnfolderBase]: 2874/4623 cut-off events. [2024-06-27 20:27:18,982 INFO L125 PetriNetUnfolderBase]: For 1212091/1212096 co-relation queries the response was YES. [2024-06-27 20:27:19,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54217 conditions, 4623 events. 2874/4623 cut-off events. For 1212091/1212096 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27459 event pairs, 654 based on Foata normal form. 4/4624 useless extension candidates. Maximal degree in co-relation 54050. Up to 3972 conditions per place. [2024-06-27 20:27:19,054 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 117 changer transitions 0/474 dead transitions. [2024-06-27 20:27:19,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 474 transitions, 7006 flow [2024-06-27 20:27:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:19,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:27:19,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:27:19,055 INFO L175 Difference]: Start difference. First operand has 360 places, 450 transitions, 5252 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:27:19,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 474 transitions, 7006 flow [2024-06-27 20:27:23,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 474 transitions, 6598 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:24,004 INFO L231 Difference]: Finished difference. Result has 364 places, 450 transitions, 5084 flow [2024-06-27 20:27:24,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4844, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5084, PETRI_PLACES=364, PETRI_TRANSITIONS=450} [2024-06-27 20:27:24,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 20:27:24,005 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 450 transitions, 5084 flow [2024-06-27 20:27:24,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:24,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:24,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:24,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:27:24,005 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)] === [2024-06-27 20:27:24,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:24,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1596605853, now seen corresponding path program 11 times [2024-06-27 20:27:24,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:24,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592752065] [2024-06-27 20:27:24,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:24,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:24,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:24,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592752065] [2024-06-27 20:27:24,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592752065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:24,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:24,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25111922] [2024-06-27 20:27:24,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:24,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:24,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:25,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:25,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 450 transitions, 5084 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:25,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:25,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:25,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:26,171 INFO L124 PetriNetUnfolderBase]: 2868/4605 cut-off events. [2024-06-27 20:27:26,171 INFO L125 PetriNetUnfolderBase]: For 1211801/1211803 co-relation queries the response was YES. [2024-06-27 20:27:26,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53667 conditions, 4605 events. 2868/4605 cut-off events. For 1211801/1211803 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27227 event pairs, 663 based on Foata normal form. 2/4605 useless extension candidates. Maximal degree in co-relation 53499. Up to 4227 conditions per place. [2024-06-27 20:27:26,242 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 417 selfloop transitions, 48 changer transitions 0/470 dead transitions. [2024-06-27 20:27:26,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 470 transitions, 6328 flow [2024-06-27 20:27:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:27:26,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:27:26,244 INFO L175 Difference]: Start difference. First operand has 364 places, 450 transitions, 5084 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:27:26,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 470 transitions, 6328 flow [2024-06-27 20:27:31,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 470 transitions, 5990 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:31,265 INFO L231 Difference]: Finished difference. Result has 366 places, 450 transitions, 4848 flow [2024-06-27 20:27:31,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4848, PETRI_PLACES=366, PETRI_TRANSITIONS=450} [2024-06-27 20:27:31,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-27 20:27:31,265 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 450 transitions, 4848 flow [2024-06-27 20:27:31,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:31,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:31,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:31,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:27:31,266 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)] === [2024-06-27 20:27:31,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:31,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1189535045, now seen corresponding path program 12 times [2024-06-27 20:27:31,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:31,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21461322] [2024-06-27 20:27:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:31,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:32,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:32,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21461322] [2024-06-27 20:27:32,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21461322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:32,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:32,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:32,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078278848] [2024-06-27 20:27:32,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:32,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:32,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:32,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:32,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 450 transitions, 4848 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:32,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:32,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:32,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:33,454 INFO L124 PetriNetUnfolderBase]: 2862/4597 cut-off events. [2024-06-27 20:27:33,454 INFO L125 PetriNetUnfolderBase]: For 1212191/1212193 co-relation queries the response was YES. [2024-06-27 20:27:33,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53064 conditions, 4597 events. 2862/4597 cut-off events. For 1212191/1212193 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27167 event pairs, 662 based on Foata normal form. 2/4597 useless extension candidates. Maximal degree in co-relation 52895. Up to 4222 conditions per place. [2024-06-27 20:27:33,518 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 49 changer transitions 0/472 dead transitions. [2024-06-27 20:27:33,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 472 transitions, 5870 flow [2024-06-27 20:27:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:27:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:27:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-27 20:27:33,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-27 20:27:33,519 INFO L175 Difference]: Start difference. First operand has 366 places, 450 transitions, 4848 flow. Second operand 11 states and 189 transitions. [2024-06-27 20:27:33,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 472 transitions, 5870 flow [2024-06-27 20:27:37,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 472 transitions, 5629 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:37,365 INFO L231 Difference]: Finished difference. Result has 370 places, 450 transitions, 4711 flow [2024-06-27 20:27:37,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4711, PETRI_PLACES=370, PETRI_TRANSITIONS=450} [2024-06-27 20:27:37,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 20:27:37,366 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 450 transitions, 4711 flow [2024-06-27 20:27:37,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:37,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:37,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:37,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:27:37,366 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)] === [2024-06-27 20:27:37,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:37,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1178413082, now seen corresponding path program 1 times [2024-06-27 20:27:37,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:37,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596210478] [2024-06-27 20:27:37,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:37,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:38,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:38,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596210478] [2024-06-27 20:27:38,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596210478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:38,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:38,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:27:38,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525391967] [2024-06-27 20:27:38,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:38,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:27:38,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:38,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:27:38,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:27:38,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:38,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 450 transitions, 4711 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:38,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:38,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:38,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:39,696 INFO L124 PetriNetUnfolderBase]: 2671/4343 cut-off events. [2024-06-27 20:27:39,696 INFO L125 PetriNetUnfolderBase]: For 1224294/1224332 co-relation queries the response was YES. [2024-06-27 20:27:39,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51440 conditions, 4343 events. 2671/4343 cut-off events. For 1224294/1224332 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26047 event pairs, 615 based on Foata normal form. 10/4299 useless extension candidates. Maximal degree in co-relation 51270. Up to 3808 conditions per place. [2024-06-27 20:27:39,758 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 48 changer transitions 0/471 dead transitions. [2024-06-27 20:27:39,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 471 transitions, 5707 flow [2024-06-27 20:27:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:27:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:27:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:27:39,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 20:27:39,759 INFO L175 Difference]: Start difference. First operand has 370 places, 450 transitions, 4711 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:27:39,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 471 transitions, 5707 flow [2024-06-27 20:27:43,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 471 transitions, 5564 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 20:27:43,863 INFO L231 Difference]: Finished difference. Result has 368 places, 453 transitions, 4780 flow [2024-06-27 20:27:43,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4780, PETRI_PLACES=368, PETRI_TRANSITIONS=453} [2024-06-27 20:27:43,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 20:27:43,863 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 453 transitions, 4780 flow [2024-06-27 20:27:43,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:43,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:43,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:43,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:27:43,864 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)] === [2024-06-27 20:27:43,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash -63234893, now seen corresponding path program 7 times [2024-06-27 20:27:43,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:43,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280970416] [2024-06-27 20:27:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:44,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:44,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280970416] [2024-06-27 20:27:44,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280970416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:44,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:44,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:44,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290306615] [2024-06-27 20:27:44,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:44,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:44,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:44,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:44,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:44,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 453 transitions, 4780 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:44,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:44,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:44,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:46,118 INFO L124 PetriNetUnfolderBase]: 2885/4631 cut-off events. [2024-06-27 20:27:46,118 INFO L125 PetriNetUnfolderBase]: For 1249679/1249681 co-relation queries the response was YES. [2024-06-27 20:27:46,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53879 conditions, 4631 events. 2885/4631 cut-off events. For 1249679/1249681 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27317 event pairs, 675 based on Foata normal form. 2/4621 useless extension candidates. Maximal degree in co-relation 53708. Up to 4248 conditions per place. [2024-06-27 20:27:46,181 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 59 changer transitions 0/471 dead transitions. [2024-06-27 20:27:46,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 471 transitions, 5861 flow [2024-06-27 20:27:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:27:46,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:27:46,182 INFO L175 Difference]: Start difference. First operand has 368 places, 453 transitions, 4780 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:27:46,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 471 transitions, 5861 flow [2024-06-27 20:27:51,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 471 transitions, 5671 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 20:27:51,658 INFO L231 Difference]: Finished difference. Result has 369 places, 458 transitions, 4832 flow [2024-06-27 20:27:51,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4832, PETRI_PLACES=369, PETRI_TRANSITIONS=458} [2024-06-27 20:27:51,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 20:27:51,658 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 458 transitions, 4832 flow [2024-06-27 20:27:51,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:51,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:51,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:51,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:27:51,658 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)] === [2024-06-27 20:27:51,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash -73959653, now seen corresponding path program 8 times [2024-06-27 20:27:51,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:51,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309557538] [2024-06-27 20:27:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:51,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:52,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:52,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309557538] [2024-06-27 20:27:52,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309557538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:52,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:52,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:52,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717019858] [2024-06-27 20:27:52,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:52,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:52,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:52,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:52,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:52,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 458 transitions, 4832 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:52,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:52,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:52,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:53,735 INFO L124 PetriNetUnfolderBase]: 2893/4639 cut-off events. [2024-06-27 20:27:53,735 INFO L125 PetriNetUnfolderBase]: For 1268411/1268413 co-relation queries the response was YES. [2024-06-27 20:27:53,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54213 conditions, 4639 events. 2893/4639 cut-off events. For 1268411/1268413 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 27372 event pairs, 668 based on Foata normal form. 2/4629 useless extension candidates. Maximal degree in co-relation 54041. Up to 4260 conditions per place. [2024-06-27 20:27:53,808 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 60 changer transitions 0/473 dead transitions. [2024-06-27 20:27:53,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 473 transitions, 5896 flow [2024-06-27 20:27:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:27:53,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 20:27:53,809 INFO L175 Difference]: Start difference. First operand has 369 places, 458 transitions, 4832 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:27:53,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 473 transitions, 5896 flow [2024-06-27 20:27:58,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 473 transitions, 5691 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:58,601 INFO L231 Difference]: Finished difference. Result has 372 places, 460 transitions, 4850 flow [2024-06-27 20:27:58,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4850, PETRI_PLACES=372, PETRI_TRANSITIONS=460} [2024-06-27 20:27:58,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 20:27:58,601 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 460 transitions, 4850 flow [2024-06-27 20:27:58,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:58,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:58,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:58,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:27:58,602 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)] === [2024-06-27 20:27:58,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:58,602 INFO L85 PathProgramCache]: Analyzing trace with hash -563720171, now seen corresponding path program 9 times [2024-06-27 20:27:58,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:58,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138763999] [2024-06-27 20:27:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:58,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:59,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:59,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138763999] [2024-06-27 20:27:59,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138763999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:59,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:59,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:59,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882720994] [2024-06-27 20:27:59,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:59,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:59,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:59,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:59,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:59,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:59,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 460 transitions, 4850 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:59,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:59,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:59,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:00,686 INFO L124 PetriNetUnfolderBase]: 2901/4655 cut-off events. [2024-06-27 20:28:00,686 INFO L125 PetriNetUnfolderBase]: For 1286669/1286671 co-relation queries the response was YES. [2024-06-27 20:28:00,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54525 conditions, 4655 events. 2901/4655 cut-off events. For 1286669/1286671 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 27512 event pairs, 675 based on Foata normal form. 2/4645 useless extension candidates. Maximal degree in co-relation 54352. Up to 4272 conditions per place. [2024-06-27 20:28:00,760 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 62 changer transitions 0/475 dead transitions. [2024-06-27 20:28:00,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 475 transitions, 5922 flow [2024-06-27 20:28:00,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:28:00,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:28:00,762 INFO L175 Difference]: Start difference. First operand has 372 places, 460 transitions, 4850 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:28:00,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 475 transitions, 5922 flow [2024-06-27 20:28:06,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 475 transitions, 5527 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-06-27 20:28:06,450 INFO L231 Difference]: Finished difference. Result has 371 places, 462 transitions, 4686 flow [2024-06-27 20:28:06,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4686, PETRI_PLACES=371, PETRI_TRANSITIONS=462} [2024-06-27 20:28:06,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-27 20:28:06,450 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 462 transitions, 4686 flow [2024-06-27 20:28:06,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:06,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:06,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:06,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:28:06,451 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)] === [2024-06-27 20:28:06,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash -74286083, now seen corresponding path program 10 times [2024-06-27 20:28:06,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:06,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382468737] [2024-06-27 20:28:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:07,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:07,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382468737] [2024-06-27 20:28:07,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382468737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:07,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:07,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:07,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242807512] [2024-06-27 20:28:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:07,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:07,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:07,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 462 transitions, 4686 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:07,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:07,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:07,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:08,505 INFO L124 PetriNetUnfolderBase]: 2896/4646 cut-off events. [2024-06-27 20:28:08,506 INFO L125 PetriNetUnfolderBase]: For 1286480/1286482 co-relation queries the response was YES. [2024-06-27 20:28:08,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53892 conditions, 4646 events. 2896/4646 cut-off events. For 1286480/1286482 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 27433 event pairs, 669 based on Foata normal form. 2/4636 useless extension candidates. Maximal degree in co-relation 53722. Up to 4239 conditions per place. [2024-06-27 20:28:08,575 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 67 changer transitions 0/478 dead transitions. [2024-06-27 20:28:08,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 478 transitions, 5770 flow [2024-06-27 20:28:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:08,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:28:08,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:28:08,577 INFO L175 Difference]: Start difference. First operand has 371 places, 462 transitions, 4686 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:28:08,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 478 transitions, 5770 flow [2024-06-27 20:28:12,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 478 transitions, 5477 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-27 20:28:12,821 INFO L231 Difference]: Finished difference. Result has 371 places, 464 transitions, 4638 flow [2024-06-27 20:28:12,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4393, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4638, PETRI_PLACES=371, PETRI_TRANSITIONS=464} [2024-06-27 20:28:12,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-27 20:28:12,822 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 464 transitions, 4638 flow [2024-06-27 20:28:12,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:12,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:12,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:12,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:28:12,823 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)] === [2024-06-27 20:28:12,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1205901265, now seen corresponding path program 5 times [2024-06-27 20:28:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:12,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146553500] [2024-06-27 20:28:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:13,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:13,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146553500] [2024-06-27 20:28:13,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146553500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:13,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:13,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790492524] [2024-06-27 20:28:13,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:13,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:28:13,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 464 transitions, 4638 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:13,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:13,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:28:13,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:14,944 INFO L124 PetriNetUnfolderBase]: 2799/4553 cut-off events. [2024-06-27 20:28:14,944 INFO L125 PetriNetUnfolderBase]: For 1300064/1300066 co-relation queries the response was YES. [2024-06-27 20:28:14,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53535 conditions, 4553 events. 2799/4553 cut-off events. For 1300064/1300066 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27492 event pairs, 636 based on Foata normal form. 1/4526 useless extension candidates. Maximal degree in co-relation 53364. Up to 3852 conditions per place. [2024-06-27 20:28:15,016 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 65 changer transitions 0/491 dead transitions. [2024-06-27 20:28:15,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 491 transitions, 5764 flow [2024-06-27 20:28:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:28:15,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 20:28:15,017 INFO L175 Difference]: Start difference. First operand has 371 places, 464 transitions, 4638 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:28:15,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 491 transitions, 5764 flow [2024-06-27 20:28:19,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 491 transitions, 5535 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:19,146 INFO L231 Difference]: Finished difference. Result has 373 places, 467 transitions, 4735 flow [2024-06-27 20:28:19,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4409, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4735, PETRI_PLACES=373, PETRI_TRANSITIONS=467} [2024-06-27 20:28:19,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 20:28:19,146 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 467 transitions, 4735 flow [2024-06-27 20:28:19,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:19,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:19,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:19,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:28:19,147 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)] === [2024-06-27 20:28:19,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash 707023223, now seen corresponding path program 2 times [2024-06-27 20:28:19,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:19,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321057034] [2024-06-27 20:28:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:19,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:20,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321057034] [2024-06-27 20:28:20,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321057034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:20,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:20,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:20,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612960770] [2024-06-27 20:28:20,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:20,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:20,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:20,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:20,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:20,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 467 transitions, 4735 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:20,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:20,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:20,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:21,357 INFO L124 PetriNetUnfolderBase]: 2906/4665 cut-off events. [2024-06-27 20:28:21,357 INFO L125 PetriNetUnfolderBase]: For 1322112/1322124 co-relation queries the response was YES. [2024-06-27 20:28:21,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54692 conditions, 4665 events. 2906/4665 cut-off events. For 1322112/1322124 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27588 event pairs, 665 based on Foata normal form. 9/4668 useless extension candidates. Maximal degree in co-relation 54520. Up to 4296 conditions per place. [2024-06-27 20:28:21,430 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 452 selfloop transitions, 36 changer transitions 0/493 dead transitions. [2024-06-27 20:28:21,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 493 transitions, 5937 flow [2024-06-27 20:28:21,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:28:21,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:28:21,431 INFO L175 Difference]: Start difference. First operand has 373 places, 467 transitions, 4735 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:28:21,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 493 transitions, 5937 flow [2024-06-27 20:28:25,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 493 transitions, 5631 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:25,646 INFO L231 Difference]: Finished difference. Result has 375 places, 470 transitions, 4665 flow [2024-06-27 20:28:25,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4429, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4665, PETRI_PLACES=375, PETRI_TRANSITIONS=470} [2024-06-27 20:28:25,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-27 20:28:25,647 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 470 transitions, 4665 flow [2024-06-27 20:28:25,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:25,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:25,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:25,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:28:25,648 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)] === [2024-06-27 20:28:25,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash 707022851, now seen corresponding path program 6 times [2024-06-27 20:28:25,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:25,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367400849] [2024-06-27 20:28:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:26,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:26,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367400849] [2024-06-27 20:28:26,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367400849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:26,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:26,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:26,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361308595] [2024-06-27 20:28:26,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:26,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:26,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:26,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:26,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:26,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:28:26,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 470 transitions, 4665 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:26,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:26,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:28:26,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:27,843 INFO L124 PetriNetUnfolderBase]: 2809/4569 cut-off events. [2024-06-27 20:28:27,843 INFO L125 PetriNetUnfolderBase]: For 1348790/1348792 co-relation queries the response was YES. [2024-06-27 20:28:27,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54485 conditions, 4569 events. 2809/4569 cut-off events. For 1348790/1348792 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 27587 event pairs, 636 based on Foata normal form. 1/4542 useless extension candidates. Maximal degree in co-relation 54312. Up to 3858 conditions per place. [2024-06-27 20:28:27,913 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 70 changer transitions 0/494 dead transitions. [2024-06-27 20:28:27,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 494 transitions, 5793 flow [2024-06-27 20:28:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:28:27,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 20:28:27,915 INFO L175 Difference]: Start difference. First operand has 375 places, 470 transitions, 4665 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:28:27,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 494 transitions, 5793 flow [2024-06-27 20:28:32,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 494 transitions, 5579 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:32,347 INFO L231 Difference]: Finished difference. Result has 377 places, 473 transitions, 4795 flow [2024-06-27 20:28:32,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4795, PETRI_PLACES=377, PETRI_TRANSITIONS=473} [2024-06-27 20:28:32,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-27 20:28:32,347 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 473 transitions, 4795 flow [2024-06-27 20:28:32,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:32,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:32,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:32,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:28:32,348 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)] === [2024-06-27 20:28:32,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:32,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1061701973, now seen corresponding path program 3 times [2024-06-27 20:28:32,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:32,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729781752] [2024-06-27 20:28:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:32,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:33,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:33,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729781752] [2024-06-27 20:28:33,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729781752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:33,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:33,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:33,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81578672] [2024-06-27 20:28:33,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:33,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:33,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:33,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:33,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:33,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 473 transitions, 4795 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:33,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:33,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:33,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:34,545 INFO L124 PetriNetUnfolderBase]: 2916/4683 cut-off events. [2024-06-27 20:28:34,546 INFO L125 PetriNetUnfolderBase]: For 1372520/1372532 co-relation queries the response was YES. [2024-06-27 20:28:34,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55759 conditions, 4683 events. 2916/4683 cut-off events. For 1372520/1372532 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 27781 event pairs, 665 based on Foata normal form. 9/4686 useless extension candidates. Maximal degree in co-relation 55585. Up to 4283 conditions per place. [2024-06-27 20:28:34,615 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 58 changer transitions 0/500 dead transitions. [2024-06-27 20:28:34,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 500 transitions, 6431 flow [2024-06-27 20:28:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:28:34,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:28:34,616 INFO L175 Difference]: Start difference. First operand has 377 places, 473 transitions, 4795 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:28:34,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 500 transitions, 6431 flow [2024-06-27 20:28:39,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 500 transitions, 6109 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:39,236 INFO L231 Difference]: Finished difference. Result has 379 places, 479 transitions, 4921 flow [2024-06-27 20:28:39,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4921, PETRI_PLACES=379, PETRI_TRANSITIONS=479} [2024-06-27 20:28:39,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 20:28:39,237 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 479 transitions, 4921 flow [2024-06-27 20:28:39,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:39,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:39,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:39,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:28:39,237 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)] === [2024-06-27 20:28:39,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1061285891, now seen corresponding path program 7 times [2024-06-27 20:28:39,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:39,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149593014] [2024-06-27 20:28:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:39,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:40,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:40,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149593014] [2024-06-27 20:28:40,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149593014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:40,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:40,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:40,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075856230] [2024-06-27 20:28:40,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:40,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:40,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:28:40,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 479 transitions, 4921 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:40,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:40,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:28:40,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:41,280 INFO L124 PetriNetUnfolderBase]: 2819/4583 cut-off events. [2024-06-27 20:28:41,280 INFO L125 PetriNetUnfolderBase]: For 1401566/1401568 co-relation queries the response was YES. [2024-06-27 20:28:41,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55574 conditions, 4583 events. 2819/4583 cut-off events. For 1401566/1401568 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 27672 event pairs, 636 based on Foata normal form. 1/4556 useless extension candidates. Maximal degree in co-relation 55399. Up to 3835 conditions per place. [2024-06-27 20:28:41,350 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 96 changer transitions 0/504 dead transitions. [2024-06-27 20:28:41,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 504 transitions, 6527 flow [2024-06-27 20:28:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:28:41,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:28:41,351 INFO L175 Difference]: Start difference. First operand has 379 places, 479 transitions, 4921 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:28:41,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 504 transitions, 6527 flow [2024-06-27 20:28:46,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 504 transitions, 6275 flow, removed 99 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:46,904 INFO L231 Difference]: Finished difference. Result has 383 places, 485 transitions, 5273 flow [2024-06-27 20:28:46,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5273, PETRI_PLACES=383, PETRI_TRANSITIONS=485} [2024-06-27 20:28:46,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 20:28:46,904 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 485 transitions, 5273 flow [2024-06-27 20:28:46,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:46,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:46,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:46,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:28:46,905 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:46,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash -851339323, now seen corresponding path program 4 times [2024-06-27 20:28:46,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:46,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507241317] [2024-06-27 20:28:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:46,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:47,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507241317] [2024-06-27 20:28:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507241317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:47,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:47,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:47,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382197191] [2024-06-27 20:28:47,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:47,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:47,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:47,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:47,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 485 transitions, 5273 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:47,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:47,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:47,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:49,100 INFO L124 PetriNetUnfolderBase]: 2926/4697 cut-off events. [2024-06-27 20:28:49,100 INFO L125 PetriNetUnfolderBase]: For 1423779/1423791 co-relation queries the response was YES. [2024-06-27 20:28:49,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56865 conditions, 4697 events. 2926/4697 cut-off events. For 1423779/1423791 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27894 event pairs, 665 based on Foata normal form. 9/4700 useless extension candidates. Maximal degree in co-relation 56688. Up to 4296 conditions per place. [2024-06-27 20:28:49,171 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 58 changer transitions 0/509 dead transitions. [2024-06-27 20:28:49,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 509 transitions, 6733 flow [2024-06-27 20:28:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:28:49,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:28:49,172 INFO L175 Difference]: Start difference. First operand has 383 places, 485 transitions, 5273 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:28:49,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 509 transitions, 6733 flow [2024-06-27 20:28:54,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 509 transitions, 6422 flow, removed 117 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:54,536 INFO L231 Difference]: Finished difference. Result has 387 places, 488 transitions, 5206 flow [2024-06-27 20:28:54,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4962, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5206, PETRI_PLACES=387, PETRI_TRANSITIONS=488} [2024-06-27 20:28:54,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-27 20:28:54,537 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 488 transitions, 5206 flow [2024-06-27 20:28:54,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:54,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:54,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:54,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:28:54,537 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:54,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:54,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2062955733, now seen corresponding path program 8 times [2024-06-27 20:28:54,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:54,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752456778] [2024-06-27 20:28:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:54,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:55,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:55,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752456778] [2024-06-27 20:28:55,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752456778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:55,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:55,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456998355] [2024-06-27 20:28:55,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:55,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:55,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:55,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:28:55,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 488 transitions, 5206 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:55,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:55,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:28:55,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:56,831 INFO L124 PetriNetUnfolderBase]: 2840/4618 cut-off events. [2024-06-27 20:28:56,831 INFO L125 PetriNetUnfolderBase]: For 1435067/1435069 co-relation queries the response was YES. [2024-06-27 20:28:56,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56204 conditions, 4618 events. 2840/4618 cut-off events. For 1435067/1435069 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 27944 event pairs, 636 based on Foata normal form. 1/4591 useless extension candidates. Maximal degree in co-relation 56025. Up to 3900 conditions per place. [2024-06-27 20:28:56,902 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 65 changer transitions 0/518 dead transitions. [2024-06-27 20:28:56,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 518 transitions, 6398 flow [2024-06-27 20:28:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:28:56,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 20:28:56,903 INFO L175 Difference]: Start difference. First operand has 387 places, 488 transitions, 5206 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:28:56,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 518 transitions, 6398 flow [2024-06-27 20:29:02,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 518 transitions, 6200 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:02,248 INFO L231 Difference]: Finished difference. Result has 390 places, 494 transitions, 5354 flow [2024-06-27 20:29:02,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5354, PETRI_PLACES=390, PETRI_TRANSITIONS=494} [2024-06-27 20:29:02,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-27 20:29:02,249 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 494 transitions, 5354 flow [2024-06-27 20:29:02,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:02,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:02,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:02,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:29:02,249 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:02,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:02,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1325165719, now seen corresponding path program 9 times [2024-06-27 20:29:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:02,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445157946] [2024-06-27 20:29:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:02,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:03,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:03,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445157946] [2024-06-27 20:29:03,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445157946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:03,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:03,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:03,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312734102] [2024-06-27 20:29:03,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:03,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:03,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:03,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:03,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:29:03,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 494 transitions, 5354 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:03,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:03,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:29:03,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:04,679 INFO L124 PetriNetUnfolderBase]: 2845/4627 cut-off events. [2024-06-27 20:29:04,679 INFO L125 PetriNetUnfolderBase]: For 1455872/1455874 co-relation queries the response was YES. [2024-06-27 20:29:04,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56523 conditions, 4627 events. 2845/4627 cut-off events. For 1455872/1455874 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 27984 event pairs, 637 based on Foata normal form. 3/4604 useless extension candidates. Maximal degree in co-relation 56343. Up to 3907 conditions per place. [2024-06-27 20:29:04,748 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 395 selfloop transitions, 69 changer transitions 0/524 dead transitions. [2024-06-27 20:29:04,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 524 transitions, 6576 flow [2024-06-27 20:29:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:29:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:29:04,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:29:04,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 20:29:04,749 INFO L175 Difference]: Start difference. First operand has 390 places, 494 transitions, 5354 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:29:04,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 524 transitions, 6576 flow [2024-06-27 20:29:11,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 524 transitions, 6290 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:11,724 INFO L231 Difference]: Finished difference. Result has 395 places, 499 transitions, 5427 flow [2024-06-27 20:29:11,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5427, PETRI_PLACES=395, PETRI_TRANSITIONS=499} [2024-06-27 20:29:11,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 20:29:11,725 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 499 transitions, 5427 flow [2024-06-27 20:29:11,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:11,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:11,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:11,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:29:11,726 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:11,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash 319396579, now seen corresponding path program 5 times [2024-06-27 20:29:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:11,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302340049] [2024-06-27 20:29:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:11,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302340049] [2024-06-27 20:29:12,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302340049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:12,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:12,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983877665] [2024-06-27 20:29:12,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:12,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:12,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 499 transitions, 5427 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:12,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:12,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:12,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:14,066 INFO L124 PetriNetUnfolderBase]: 2944/4730 cut-off events. [2024-06-27 20:29:14,066 INFO L125 PetriNetUnfolderBase]: For 1460368/1460380 co-relation queries the response was YES. [2024-06-27 20:29:14,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56941 conditions, 4730 events. 2944/4730 cut-off events. For 1460368/1460380 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 28112 event pairs, 665 based on Foata normal form. 9/4733 useless extension candidates. Maximal degree in co-relation 56759. Up to 4350 conditions per place. [2024-06-27 20:29:14,138 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 481 selfloop transitions, 35 changer transitions 0/521 dead transitions. [2024-06-27 20:29:14,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 521 transitions, 6532 flow [2024-06-27 20:29:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:14,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:29:14,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:29:14,139 INFO L175 Difference]: Start difference. First operand has 395 places, 499 transitions, 5427 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:29:14,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 521 transitions, 6532 flow [2024-06-27 20:29:20,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 521 transitions, 6141 flow, removed 130 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:20,333 INFO L231 Difference]: Finished difference. Result has 397 places, 499 transitions, 5112 flow [2024-06-27 20:29:20,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5036, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5112, PETRI_PLACES=397, PETRI_TRANSITIONS=499} [2024-06-27 20:29:20,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 20:29:20,333 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 499 transitions, 5112 flow [2024-06-27 20:29:20,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:20,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:20,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:20,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:29:20,334 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:20,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash 313855453, now seen corresponding path program 13 times [2024-06-27 20:29:20,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:20,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297023217] [2024-06-27 20:29:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:20,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:21,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:21,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297023217] [2024-06-27 20:29:21,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297023217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:21,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:21,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261494572] [2024-06-27 20:29:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:21,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:21,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:21,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:21,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 499 transitions, 5112 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:21,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:21,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:21,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:22,574 INFO L124 PetriNetUnfolderBase]: 2954/4741 cut-off events. [2024-06-27 20:29:22,575 INFO L125 PetriNetUnfolderBase]: For 1487432/1487436 co-relation queries the response was YES. [2024-06-27 20:29:22,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56946 conditions, 4741 events. 2954/4741 cut-off events. For 1487432/1487436 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 28160 event pairs, 674 based on Foata normal form. 3/4732 useless extension candidates. Maximal degree in co-relation 56762. Up to 4320 conditions per place. [2024-06-27 20:29:22,647 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 43 changer transitions 0/524 dead transitions. [2024-06-27 20:29:22,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 524 transitions, 6379 flow [2024-06-27 20:29:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:29:22,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:29:22,648 INFO L175 Difference]: Start difference. First operand has 397 places, 499 transitions, 5112 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:29:22,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 524 transitions, 6379 flow [2024-06-27 20:29:28,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 524 transitions, 6253 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 20:29:28,847 INFO L231 Difference]: Finished difference. Result has 397 places, 502 transitions, 5231 flow [2024-06-27 20:29:28,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5231, PETRI_PLACES=397, PETRI_TRANSITIONS=502} [2024-06-27 20:29:28,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 20:29:28,847 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 502 transitions, 5231 flow [2024-06-27 20:29:28,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:28,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:28,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:28,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:29:28,848 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:28,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash 319396207, now seen corresponding path program 10 times [2024-06-27 20:29:28,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:28,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058829310] [2024-06-27 20:29:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:28,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:29,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:29,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058829310] [2024-06-27 20:29:29,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058829310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:29,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:29,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246801162] [2024-06-27 20:29:29,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:29,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:29,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:29,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:29,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:29,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:29:29,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 502 transitions, 5231 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:29,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:29,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:29:29,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:31,135 INFO L124 PetriNetUnfolderBase]: 2849/4633 cut-off events. [2024-06-27 20:29:31,135 INFO L125 PetriNetUnfolderBase]: For 1491984/1491988 co-relation queries the response was YES. [2024-06-27 20:29:31,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56297 conditions, 4633 events. 2849/4633 cut-off events. For 1491984/1491988 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 28015 event pairs, 638 based on Foata normal form. 2/4607 useless extension candidates. Maximal degree in co-relation 56112. Up to 3901 conditions per place. [2024-06-27 20:29:31,203 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 74 changer transitions 0/522 dead transitions. [2024-06-27 20:29:31,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 522 transitions, 6211 flow [2024-06-27 20:29:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:29:31,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 20:29:31,204 INFO L175 Difference]: Start difference. First operand has 397 places, 502 transitions, 5231 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:29:31,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 522 transitions, 6211 flow [2024-06-27 20:29:37,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 522 transitions, 5885 flow, removed 122 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:37,624 INFO L231 Difference]: Finished difference. Result has 399 places, 502 transitions, 5059 flow [2024-06-27 20:29:37,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4905, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5059, PETRI_PLACES=399, PETRI_TRANSITIONS=502} [2024-06-27 20:29:37,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 20:29:37,625 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 502 transitions, 5059 flow [2024-06-27 20:29:37,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:37,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:37,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:37,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:29:37,625 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:37,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:37,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1643988719, now seen corresponding path program 14 times [2024-06-27 20:29:37,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:37,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990440431] [2024-06-27 20:29:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:37,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:38,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:38,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990440431] [2024-06-27 20:29:38,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990440431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:38,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:38,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:38,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736313027] [2024-06-27 20:29:38,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:38,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:38,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:38,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:38,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 502 transitions, 5059 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:38,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:38,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:38,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:39,868 INFO L124 PetriNetUnfolderBase]: 2961/4759 cut-off events. [2024-06-27 20:29:39,868 INFO L125 PetriNetUnfolderBase]: For 1515974/1515978 co-relation queries the response was YES. [2024-06-27 20:29:39,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57091 conditions, 4759 events. 2961/4759 cut-off events. For 1515974/1515978 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28370 event pairs, 669 based on Foata normal form. 3/4750 useless extension candidates. Maximal degree in co-relation 56905. Up to 4289 conditions per place. [2024-06-27 20:29:39,939 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 466 selfloop transitions, 55 changer transitions 0/526 dead transitions. [2024-06-27 20:29:39,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 526 transitions, 6616 flow [2024-06-27 20:29:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:29:39,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:29:39,940 INFO L175 Difference]: Start difference. First operand has 399 places, 502 transitions, 5059 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:29:39,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 526 transitions, 6616 flow [2024-06-27 20:29:47,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 526 transitions, 6305 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-27 20:29:47,044 INFO L231 Difference]: Finished difference. Result has 399 places, 505 transitions, 5017 flow [2024-06-27 20:29:47,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4748, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5017, PETRI_PLACES=399, PETRI_TRANSITIONS=505} [2024-06-27 20:29:47,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 20:29:47,044 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 505 transitions, 5017 flow [2024-06-27 20:29:47,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:47,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:47,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:47,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:29:47,045 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:47,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2059220264, now seen corresponding path program 5 times [2024-06-27 20:29:47,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:47,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862317382] [2024-06-27 20:29:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:47,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:47,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:47,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862317382] [2024-06-27 20:29:47,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862317382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:47,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:47,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:47,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216844639] [2024-06-27 20:29:47,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:47,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:47,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:47,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:47,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:47,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 505 transitions, 5017 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:47,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:47,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:47,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:49,382 INFO L124 PetriNetUnfolderBase]: 2955/4750 cut-off events. [2024-06-27 20:29:49,382 INFO L125 PetriNetUnfolderBase]: For 1515724/1515736 co-relation queries the response was YES. [2024-06-27 20:29:49,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56561 conditions, 4750 events. 2955/4750 cut-off events. For 1515724/1515736 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28317 event pairs, 660 based on Foata normal form. 10/4754 useless extension candidates. Maximal degree in co-relation 56375. Up to 4386 conditions per place. [2024-06-27 20:29:49,452 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 495 selfloop transitions, 28 changer transitions 0/528 dead transitions. [2024-06-27 20:29:49,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 528 transitions, 6187 flow [2024-06-27 20:29:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:29:49,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:29:49,453 INFO L175 Difference]: Start difference. First operand has 399 places, 505 transitions, 5017 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:29:49,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 528 transitions, 6187 flow [2024-06-27 20:29:57,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 528 transitions, 5706 flow, removed 122 selfloop flow, removed 9 redundant places. [2024-06-27 20:29:57,370 INFO L231 Difference]: Finished difference. Result has 399 places, 506 transitions, 4625 flow [2024-06-27 20:29:57,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4552, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4625, PETRI_PLACES=399, PETRI_TRANSITIONS=506} [2024-06-27 20:29:57,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 20:29:57,370 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 506 transitions, 4625 flow [2024-06-27 20:29:57,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:57,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:57,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:57,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:29:57,371 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:57,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2059220667, now seen corresponding path program 15 times [2024-06-27 20:29:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:57,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540357596] [2024-06-27 20:29:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:58,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:58,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540357596] [2024-06-27 20:29:58,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540357596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:58,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:58,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:58,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073122707] [2024-06-27 20:29:58,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:58,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:58,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:58,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:58,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 506 transitions, 4625 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:58,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:58,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:58,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:59,648 INFO L124 PetriNetUnfolderBase]: 2949/4741 cut-off events. [2024-06-27 20:29:59,648 INFO L125 PetriNetUnfolderBase]: For 1509854/1509858 co-relation queries the response was YES. [2024-06-27 20:29:59,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55558 conditions, 4741 events. 2949/4741 cut-off events. For 1509854/1509858 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28236 event pairs, 666 based on Foata normal form. 3/4732 useless extension candidates. Maximal degree in co-relation 55373. Up to 4276 conditions per place. [2024-06-27 20:29:59,717 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 465 selfloop transitions, 56 changer transitions 0/526 dead transitions. [2024-06-27 20:29:59,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 526 transitions, 5751 flow [2024-06-27 20:29:59,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:29:59,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:29:59,718 INFO L175 Difference]: Start difference. First operand has 399 places, 506 transitions, 4625 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:29:59,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 526 transitions, 5751 flow [2024-06-27 20:30:05,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 526 transitions, 5577 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:30:05,148 INFO L231 Difference]: Finished difference. Result has 401 places, 506 transitions, 4569 flow [2024-06-27 20:30:05,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4569, PETRI_PLACES=401, PETRI_TRANSITIONS=506} [2024-06-27 20:30:05,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-27 20:30:05,149 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 506 transitions, 4569 flow [2024-06-27 20:30:05,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:05,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:05,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:05,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:30:05,149 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:05,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:05,149 INFO L85 PathProgramCache]: Analyzing trace with hash 346331864, now seen corresponding path program 6 times [2024-06-27 20:30:05,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:05,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245991608] [2024-06-27 20:30:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245991608] [2024-06-27 20:30:06,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245991608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:06,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:06,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:06,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131822938] [2024-06-27 20:30:06,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:06,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:06,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:06,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:06,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 506 transitions, 4569 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:06,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:06,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:06,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:07,423 INFO L124 PetriNetUnfolderBase]: 2975/4786 cut-off events. [2024-06-27 20:30:07,423 INFO L125 PetriNetUnfolderBase]: For 1551736/1551748 co-relation queries the response was YES. [2024-06-27 20:30:07,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56422 conditions, 4786 events. 2975/4786 cut-off events. For 1551736/1551748 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 28663 event pairs, 643 based on Foata normal form. 10/4790 useless extension candidates. Maximal degree in co-relation 56236. Up to 4323 conditions per place. [2024-06-27 20:30:07,494 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 58 changer transitions 0/535 dead transitions. [2024-06-27 20:30:07,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 535 transitions, 6280 flow [2024-06-27 20:30:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:30:07,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:30:07,495 INFO L175 Difference]: Start difference. First operand has 401 places, 506 transitions, 4569 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:30:07,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 535 transitions, 6280 flow [2024-06-27 20:30:13,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 535 transitions, 6100 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:30:13,546 INFO L231 Difference]: Finished difference. Result has 402 places, 514 transitions, 4803 flow [2024-06-27 20:30:13,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4389, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4803, PETRI_PLACES=402, PETRI_TRANSITIONS=514} [2024-06-27 20:30:13,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-27 20:30:13,546 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 514 transitions, 4803 flow [2024-06-27 20:30:13,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:13,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:13,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:13,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:30:13,547 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:13,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash 345886394, now seen corresponding path program 7 times [2024-06-27 20:30:13,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:13,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285863560] [2024-06-27 20:30:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:14,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285863560] [2024-06-27 20:30:14,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285863560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:14,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:14,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702539653] [2024-06-27 20:30:14,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:14,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:14,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:14,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:14,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:14,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:14,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 514 transitions, 4803 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:14,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:14,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:14,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:15,821 INFO L124 PetriNetUnfolderBase]: 2985/4802 cut-off events. [2024-06-27 20:30:15,821 INFO L125 PetriNetUnfolderBase]: For 1580381/1580393 co-relation queries the response was YES. [2024-06-27 20:30:15,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57135 conditions, 4802 events. 2985/4802 cut-off events. For 1580381/1580393 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 28772 event pairs, 650 based on Foata normal form. 10/4806 useless extension candidates. Maximal degree in co-relation 56947. Up to 4333 conditions per place. [2024-06-27 20:30:15,892 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 475 selfloop transitions, 58 changer transitions 0/538 dead transitions. [2024-06-27 20:30:15,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 538 transitions, 6393 flow [2024-06-27 20:30:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:30:15,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:30:15,893 INFO L175 Difference]: Start difference. First operand has 402 places, 514 transitions, 4803 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:30:15,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 538 transitions, 6393 flow [2024-06-27 20:30:21,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 538 transitions, 6147 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:21,876 INFO L231 Difference]: Finished difference. Result has 406 places, 517 transitions, 4816 flow [2024-06-27 20:30:21,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4816, PETRI_PLACES=406, PETRI_TRANSITIONS=517} [2024-06-27 20:30:21,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-27 20:30:21,876 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 517 transitions, 4816 flow [2024-06-27 20:30:21,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:21,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:21,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:21,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:30:21,877 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:21,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash 332999384, now seen corresponding path program 8 times [2024-06-27 20:30:21,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:21,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516762242] [2024-06-27 20:30:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:21,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:22,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:22,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516762242] [2024-06-27 20:30:22,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516762242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:22,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:22,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:22,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930876188] [2024-06-27 20:30:22,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:22,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:22,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:22,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:22,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:22,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 517 transitions, 4816 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:22,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:22,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:22,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:24,209 INFO L124 PetriNetUnfolderBase]: 2979/4788 cut-off events. [2024-06-27 20:30:24,209 INFO L125 PetriNetUnfolderBase]: For 1575684/1575696 co-relation queries the response was YES. [2024-06-27 20:30:24,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56779 conditions, 4788 events. 2979/4788 cut-off events. For 1575684/1575696 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28617 event pairs, 651 based on Foata normal form. 10/4792 useless extension candidates. Maximal degree in co-relation 56589. Up to 4328 conditions per place. [2024-06-27 20:30:24,282 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 57 changer transitions 0/538 dead transitions. [2024-06-27 20:30:24,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 538 transitions, 5996 flow [2024-06-27 20:30:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:30:24,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:30:24,283 INFO L175 Difference]: Start difference. First operand has 406 places, 517 transitions, 4816 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:30:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 538 transitions, 5996 flow [2024-06-27 20:30:29,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 538 transitions, 5745 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:29,949 INFO L231 Difference]: Finished difference. Result has 409 places, 518 transitions, 4698 flow [2024-06-27 20:30:29,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4698, PETRI_PLACES=409, PETRI_TRANSITIONS=518} [2024-06-27 20:30:29,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-27 20:30:29,950 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 518 transitions, 4698 flow [2024-06-27 20:30:29,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:29,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:29,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:29,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:30:29,950 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:29,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1566739595, now seen corresponding path program 16 times [2024-06-27 20:30:29,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:29,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78480395] [2024-06-27 20:30:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:29,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:30,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:30,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78480395] [2024-06-27 20:30:30,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78480395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:30,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:30,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:30,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65750682] [2024-06-27 20:30:30,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:30,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:30,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:30,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:30,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:30,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:30,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 518 transitions, 4698 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:30,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:30,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:30,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:32,247 INFO L124 PetriNetUnfolderBase]: 3005/4851 cut-off events. [2024-06-27 20:30:32,247 INFO L125 PetriNetUnfolderBase]: For 1622499/1622503 co-relation queries the response was YES. [2024-06-27 20:30:32,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57837 conditions, 4851 events. 3005/4851 cut-off events. For 1622499/1622503 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29218 event pairs, 657 based on Foata normal form. 3/4842 useless extension candidates. Maximal degree in co-relation 57646. Up to 4217 conditions per place. [2024-06-27 20:30:32,321 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 437 selfloop transitions, 101 changer transitions 0/543 dead transitions. [2024-06-27 20:30:32,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 543 transitions, 6522 flow [2024-06-27 20:30:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:30:32,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:30:32,322 INFO L175 Difference]: Start difference. First operand has 409 places, 518 transitions, 4698 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:30:32,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 543 transitions, 6522 flow [2024-06-27 20:30:38,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 543 transitions, 6421 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:38,414 INFO L231 Difference]: Finished difference. Result has 412 places, 524 transitions, 5183 flow [2024-06-27 20:30:38,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4597, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5183, PETRI_PLACES=412, PETRI_TRANSITIONS=524} [2024-06-27 20:30:38,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 20:30:38,415 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 524 transitions, 5183 flow [2024-06-27 20:30:38,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:38,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:38,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:38,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:30:38,415 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:38,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1171237911, now seen corresponding path program 17 times [2024-06-27 20:30:38,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:38,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112407378] [2024-06-27 20:30:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:38,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:39,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:39,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112407378] [2024-06-27 20:30:39,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112407378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:39,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:39,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:39,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460307698] [2024-06-27 20:30:39,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:39,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:39,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:39,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:39,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:39,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 524 transitions, 5183 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:39,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:39,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:39,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:40,870 INFO L124 PetriNetUnfolderBase]: 3015/4849 cut-off events. [2024-06-27 20:30:40,870 INFO L125 PetriNetUnfolderBase]: For 1656881/1656885 co-relation queries the response was YES. [2024-06-27 20:30:40,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58825 conditions, 4849 events. 3015/4849 cut-off events. For 1656881/1656885 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29046 event pairs, 668 based on Foata normal form. 3/4840 useless extension candidates. Maximal degree in co-relation 58633. Up to 4227 conditions per place. [2024-06-27 20:30:40,950 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 444 selfloop transitions, 97 changer transitions 0/546 dead transitions. [2024-06-27 20:30:40,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 546 transitions, 6835 flow [2024-06-27 20:30:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:30:40,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:30:40,952 INFO L175 Difference]: Start difference. First operand has 412 places, 524 transitions, 5183 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:30:40,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 546 transitions, 6835 flow [2024-06-27 20:30:49,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 546 transitions, 6511 flow, removed 122 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:49,077 INFO L231 Difference]: Finished difference. Result has 416 places, 527 transitions, 5251 flow [2024-06-27 20:30:49,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4891, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5251, PETRI_PLACES=416, PETRI_TRANSITIONS=527} [2024-06-27 20:30:49,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-27 20:30:49,078 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 527 transitions, 5251 flow [2024-06-27 20:30:49,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:49,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:49,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:49,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:30:49,078 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:49,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1579637765, now seen corresponding path program 18 times [2024-06-27 20:30:49,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:49,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306571524] [2024-06-27 20:30:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:49,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:49,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:49,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306571524] [2024-06-27 20:30:49,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306571524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:49,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:49,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:49,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372104113] [2024-06-27 20:30:49,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:49,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:49,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:49,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:49,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:50,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:50,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 527 transitions, 5251 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:50,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:50,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:50,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:51,279 INFO L124 PetriNetUnfolderBase]: 3009/4843 cut-off events. [2024-06-27 20:30:51,279 INFO L125 PetriNetUnfolderBase]: For 1649432/1649436 co-relation queries the response was YES. [2024-06-27 20:30:51,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58423 conditions, 4843 events. 3009/4843 cut-off events. For 1649432/1649436 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29033 event pairs, 668 based on Foata normal form. 3/4834 useless extension candidates. Maximal degree in co-relation 58229. Up to 4222 conditions per place. [2024-06-27 20:30:51,361 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 442 selfloop transitions, 98 changer transitions 0/545 dead transitions. [2024-06-27 20:30:51,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 545 transitions, 6417 flow [2024-06-27 20:30:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:30:51,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:30:51,362 INFO L175 Difference]: Start difference. First operand has 416 places, 527 transitions, 5251 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:30:51,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 545 transitions, 6417 flow [2024-06-27 20:30:58,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 545 transitions, 5898 flow, removed 145 selfloop flow, removed 7 redundant places. [2024-06-27 20:30:58,561 INFO L231 Difference]: Finished difference. Result has 418 places, 527 transitions, 4934 flow [2024-06-27 20:30:58,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4934, PETRI_PLACES=418, PETRI_TRANSITIONS=527} [2024-06-27 20:30:58,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-27 20:30:58,561 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 527 transitions, 4934 flow [2024-06-27 20:30:58,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:58,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:58,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:30:58,562 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:58,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash -62844634, now seen corresponding path program 9 times [2024-06-27 20:30:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:58,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090337000] [2024-06-27 20:30:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:58,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:59,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:59,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090337000] [2024-06-27 20:30:59,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090337000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:59,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:59,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:59,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636317176] [2024-06-27 20:30:59,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:59,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:59,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:59,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:59,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:59,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 527 transitions, 4934 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:59,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:59,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:59,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:00,792 INFO L124 PetriNetUnfolderBase]: 3043/4893 cut-off events. [2024-06-27 20:31:00,792 INFO L125 PetriNetUnfolderBase]: For 1703230/1703245 co-relation queries the response was YES. [2024-06-27 20:31:00,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59300 conditions, 4893 events. 3043/4893 cut-off events. For 1703230/1703245 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29434 event pairs, 637 based on Foata normal form. 12/4897 useless extension candidates. Maximal degree in co-relation 59105. Up to 4177 conditions per place. [2024-06-27 20:31:00,873 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 434 selfloop transitions, 130 changer transitions 0/569 dead transitions. [2024-06-27 20:31:00,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 569 transitions, 7246 flow [2024-06-27 20:31:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:31:00,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:31:00,874 INFO L175 Difference]: Start difference. First operand has 418 places, 527 transitions, 4934 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:31:00,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 569 transitions, 7246 flow [2024-06-27 20:31:07,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 569 transitions, 7040 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:31:07,263 INFO L231 Difference]: Finished difference. Result has 422 places, 547 transitions, 5620 flow [2024-06-27 20:31:07,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4728, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5620, PETRI_PLACES=422, PETRI_TRANSITIONS=547} [2024-06-27 20:31:07,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-27 20:31:07,263 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 547 transitions, 5620 flow [2024-06-27 20:31:07,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:07,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:07,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:07,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:31:07,264 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:07,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:07,264 INFO L85 PathProgramCache]: Analyzing trace with hash 511093319, now seen corresponding path program 19 times [2024-06-27 20:31:07,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:07,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119223883] [2024-06-27 20:31:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:07,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:08,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:08,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119223883] [2024-06-27 20:31:08,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119223883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:08,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:08,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:08,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017322678] [2024-06-27 20:31:08,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:08,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:08,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:08,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:08,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:08,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:08,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 547 transitions, 5620 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:08,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:08,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:08,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:09,614 INFO L124 PetriNetUnfolderBase]: 3093/4978 cut-off events. [2024-06-27 20:31:09,614 INFO L125 PetriNetUnfolderBase]: For 1804091/1804098 co-relation queries the response was YES. [2024-06-27 20:31:09,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62560 conditions, 4978 events. 3093/4978 cut-off events. For 1804091/1804098 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 30095 event pairs, 673 based on Foata normal form. 5/4968 useless extension candidates. Maximal degree in co-relation 62361. Up to 4019 conditions per place. [2024-06-27 20:31:09,700 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 375 selfloop transitions, 198 changer transitions 0/578 dead transitions. [2024-06-27 20:31:09,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 578 transitions, 8524 flow [2024-06-27 20:31:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:31:09,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:31:09,701 INFO L175 Difference]: Start difference. First operand has 422 places, 547 transitions, 5620 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:31:09,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 578 transitions, 8524 flow [2024-06-27 20:31:16,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 578 transitions, 8260 flow, removed 115 selfloop flow, removed 3 redundant places. [2024-06-27 20:31:16,922 INFO L231 Difference]: Finished difference. Result has 428 places, 559 transitions, 6540 flow [2024-06-27 20:31:16,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5372, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6540, PETRI_PLACES=428, PETRI_TRANSITIONS=559} [2024-06-27 20:31:16,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 20:31:16,923 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 559 transitions, 6540 flow [2024-06-27 20:31:16,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:16,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:16,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:16,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:31:16,923 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:16,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:16,923 INFO L85 PathProgramCache]: Analyzing trace with hash 973394249, now seen corresponding path program 20 times [2024-06-27 20:31:16,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:16,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066499496] [2024-06-27 20:31:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:16,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:17,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:17,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066499496] [2024-06-27 20:31:17,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066499496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:17,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:17,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:17,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100352911] [2024-06-27 20:31:17,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:17,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:17,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:17,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:17,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:17,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 559 transitions, 6540 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:17,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:17,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:17,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:19,440 INFO L124 PetriNetUnfolderBase]: 3135/5019 cut-off events. [2024-06-27 20:31:19,440 INFO L125 PetriNetUnfolderBase]: For 1873902/1873906 co-relation queries the response was YES. [2024-06-27 20:31:19,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64608 conditions, 5019 events. 3135/5019 cut-off events. For 1873902/1873906 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30046 event pairs, 697 based on Foata normal form. 3/5010 useless extension candidates. Maximal degree in co-relation 64407. Up to 4564 conditions per place. [2024-06-27 20:31:19,529 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 74 changer transitions 0/586 dead transitions. [2024-06-27 20:31:19,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 586 transitions, 8958 flow [2024-06-27 20:31:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:31:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:31:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 20:31:19,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-27 20:31:19,530 INFO L175 Difference]: Start difference. First operand has 428 places, 559 transitions, 6540 flow. Second operand 11 states and 188 transitions. [2024-06-27 20:31:19,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 586 transitions, 8958 flow [2024-06-27 20:31:28,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 586 transitions, 8296 flow, removed 211 selfloop flow, removed 4 redundant places. [2024-06-27 20:31:28,094 INFO L231 Difference]: Finished difference. Result has 437 places, 568 transitions, 6648 flow [2024-06-27 20:31:28,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6648, PETRI_PLACES=437, PETRI_TRANSITIONS=568} [2024-06-27 20:31:28,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-27 20:31:28,095 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 568 transitions, 6648 flow [2024-06-27 20:31:28,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:28,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:28,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:28,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:31:28,095 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:28,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash -386019832, now seen corresponding path program 10 times [2024-06-27 20:31:28,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:28,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85789212] [2024-06-27 20:31:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:28,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:29,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:29,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85789212] [2024-06-27 20:31:29,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85789212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:29,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:29,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625596541] [2024-06-27 20:31:29,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:29,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:29,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:29,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:29,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 568 transitions, 6648 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:29,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:29,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:29,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:30,469 INFO L124 PetriNetUnfolderBase]: 3193/5130 cut-off events. [2024-06-27 20:31:30,469 INFO L125 PetriNetUnfolderBase]: For 1946459/1946474 co-relation queries the response was YES. [2024-06-27 20:31:30,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65543 conditions, 5130 events. 3193/5130 cut-off events. For 1946459/1946474 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 31155 event pairs, 655 based on Foata normal form. 12/5134 useless extension candidates. Maximal degree in co-relation 65339. Up to 4359 conditions per place. [2024-06-27 20:31:30,561 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 452 selfloop transitions, 148 changer transitions 0/605 dead transitions. [2024-06-27 20:31:30,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 605 transitions, 9347 flow [2024-06-27 20:31:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:31:30,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:31:30,562 INFO L175 Difference]: Start difference. First operand has 437 places, 568 transitions, 6648 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:31:30,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 605 transitions, 9347 flow [2024-06-27 20:31:38,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 605 transitions, 9037 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:38,325 INFO L231 Difference]: Finished difference. Result has 440 places, 584 transitions, 7211 flow [2024-06-27 20:31:38,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7211, PETRI_PLACES=440, PETRI_TRANSITIONS=584} [2024-06-27 20:31:38,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-27 20:31:38,326 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 584 transitions, 7211 flow [2024-06-27 20:31:38,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:38,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:38,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:38,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:31:38,327 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:38,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:38,327 INFO L85 PathProgramCache]: Analyzing trace with hash -386465705, now seen corresponding path program 21 times [2024-06-27 20:31:38,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:38,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471472293] [2024-06-27 20:31:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:39,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:39,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471472293] [2024-06-27 20:31:39,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471472293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:39,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:39,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:39,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542666450] [2024-06-27 20:31:39,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:39,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:39,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:39,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:39,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 584 transitions, 7211 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:39,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:39,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:39,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:40,816 INFO L124 PetriNetUnfolderBase]: 3219/5206 cut-off events. [2024-06-27 20:31:40,817 INFO L125 PetriNetUnfolderBase]: For 1997754/1997761 co-relation queries the response was YES. [2024-06-27 20:31:40,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66961 conditions, 5206 events. 3219/5206 cut-off events. For 1997754/1997761 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 32049 event pairs, 682 based on Foata normal form. 5/5196 useless extension candidates. Maximal degree in co-relation 66755. Up to 4164 conditions per place. [2024-06-27 20:31:40,912 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 372 selfloop transitions, 231 changer transitions 0/608 dead transitions. [2024-06-27 20:31:40,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 608 transitions, 9457 flow [2024-06-27 20:31:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:31:40,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:31:40,913 INFO L175 Difference]: Start difference. First operand has 440 places, 584 transitions, 7211 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:31:40,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 608 transitions, 9457 flow [2024-06-27 20:31:50,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 608 transitions, 9135 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-27 20:31:50,244 INFO L231 Difference]: Finished difference. Result has 445 places, 590 transitions, 7701 flow [2024-06-27 20:31:50,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7701, PETRI_PLACES=445, PETRI_TRANSITIONS=590} [2024-06-27 20:31:50,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-27 20:31:50,244 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 590 transitions, 7701 flow [2024-06-27 20:31:50,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:50,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:50,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:50,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:31:50,245 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:50,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:50,245 INFO L85 PathProgramCache]: Analyzing trace with hash -63231917, now seen corresponding path program 22 times [2024-06-27 20:31:50,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:50,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761077614] [2024-06-27 20:31:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:50,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:51,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:51,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761077614] [2024-06-27 20:31:51,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761077614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:51,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:51,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:51,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556052732] [2024-06-27 20:31:51,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:51,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:51,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:51,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:51,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 590 transitions, 7701 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:51,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:51,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:51,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:52,731 INFO L124 PetriNetUnfolderBase]: 3213/5137 cut-off events. [2024-06-27 20:31:52,731 INFO L125 PetriNetUnfolderBase]: For 1994876/1994880 co-relation queries the response was YES. [2024-06-27 20:31:52,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66704 conditions, 5137 events. 3213/5137 cut-off events. For 1994876/1994880 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30842 event pairs, 716 based on Foata normal form. 3/5128 useless extension candidates. Maximal degree in co-relation 66497. Up to 4707 conditions per place. [2024-06-27 20:31:52,826 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 536 selfloop transitions, 61 changer transitions 0/602 dead transitions. [2024-06-27 20:31:52,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 602 transitions, 8935 flow [2024-06-27 20:31:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:52,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:31:52,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:31:52,827 INFO L175 Difference]: Start difference. First operand has 445 places, 590 transitions, 7701 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:31:52,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 602 transitions, 8935 flow [2024-06-27 20:32:02,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 602 transitions, 8324 flow, removed 162 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:02,100 INFO L231 Difference]: Finished difference. Result has 449 places, 590 transitions, 7218 flow [2024-06-27 20:32:02,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7218, PETRI_PLACES=449, PETRI_TRANSITIONS=590} [2024-06-27 20:32:02,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-27 20:32:02,101 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 590 transitions, 7218 flow [2024-06-27 20:32:02,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:02,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:02,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:02,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:32:02,102 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:02,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -386465302, now seen corresponding path program 11 times [2024-06-27 20:32:02,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:02,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390656677] [2024-06-27 20:32:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:02,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:03,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:03,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390656677] [2024-06-27 20:32:03,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390656677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:03,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:03,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574533803] [2024-06-27 20:32:03,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:03,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:03,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:03,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 590 transitions, 7218 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:03,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:03,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:04,592 INFO L124 PetriNetUnfolderBase]: 3239/5194 cut-off events. [2024-06-27 20:32:04,592 INFO L125 PetriNetUnfolderBase]: For 2037544/2037559 co-relation queries the response was YES. [2024-06-27 20:32:04,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66613 conditions, 5194 events. 3239/5194 cut-off events. For 2037544/2037559 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31552 event pairs, 660 based on Foata normal form. 12/5198 useless extension candidates. Maximal degree in co-relation 66405. Up to 4412 conditions per place. [2024-06-27 20:32:04,684 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 460 selfloop transitions, 152 changer transitions 0/617 dead transitions. [2024-06-27 20:32:04,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 617 transitions, 9669 flow [2024-06-27 20:32:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:32:04,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:32:04,685 INFO L175 Difference]: Start difference. First operand has 449 places, 590 transitions, 7218 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:32:04,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 617 transitions, 9669 flow [2024-06-27 20:32:14,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 617 transitions, 9539 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:32:14,309 INFO L231 Difference]: Finished difference. Result has 450 places, 596 transitions, 7598 flow [2024-06-27 20:32:14,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7088, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7598, PETRI_PLACES=450, PETRI_TRANSITIONS=596} [2024-06-27 20:32:14,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-27 20:32:14,310 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 596 transitions, 7598 flow [2024-06-27 20:32:14,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:14,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:14,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:14,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:32:14,310 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:14,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1138979110, now seen corresponding path program 12 times [2024-06-27 20:32:14,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:14,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380921047] [2024-06-27 20:32:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:15,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:15,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380921047] [2024-06-27 20:32:15,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380921047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:15,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:15,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:15,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891301057] [2024-06-27 20:32:15,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:15,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:15,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:15,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:15,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:15,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:15,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 596 transitions, 7598 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:15,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:15,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:15,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:16,842 INFO L124 PetriNetUnfolderBase]: 3249/5204 cut-off events. [2024-06-27 20:32:16,843 INFO L125 PetriNetUnfolderBase]: For 2064697/2064712 co-relation queries the response was YES. [2024-06-27 20:32:16,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67321 conditions, 5204 events. 3249/5204 cut-off events. For 2064697/2064712 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31569 event pairs, 666 based on Foata normal form. 12/5208 useless extension candidates. Maximal degree in co-relation 67112. Up to 4422 conditions per place. [2024-06-27 20:32:16,936 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 462 selfloop transitions, 154 changer transitions 0/621 dead transitions. [2024-06-27 20:32:16,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 621 transitions, 9738 flow [2024-06-27 20:32:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:16,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:32:16,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:32:16,938 INFO L175 Difference]: Start difference. First operand has 450 places, 596 transitions, 7598 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:32:16,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 621 transitions, 9738 flow [2024-06-27 20:32:27,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 621 transitions, 9401 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:27,149 INFO L231 Difference]: Finished difference. Result has 454 places, 601 transitions, 7760 flow [2024-06-27 20:32:27,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7271, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7760, PETRI_PLACES=454, PETRI_TRANSITIONS=601} [2024-06-27 20:32:27,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-27 20:32:27,150 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 601 transitions, 7760 flow [2024-06-27 20:32:27,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:27,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:27,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:27,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:32:27,151 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:27,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:27,151 INFO L85 PathProgramCache]: Analyzing trace with hash -827779186, now seen corresponding path program 13 times [2024-06-27 20:32:27,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:27,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129857074] [2024-06-27 20:32:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:27,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:28,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:28,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129857074] [2024-06-27 20:32:28,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129857074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:28,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:28,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:28,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183607833] [2024-06-27 20:32:28,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:28,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:28,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:28,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:28,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:28,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 601 transitions, 7760 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:28,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:28,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:28,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:29,501 INFO L124 PetriNetUnfolderBase]: 3243/5204 cut-off events. [2024-06-27 20:32:29,501 INFO L125 PetriNetUnfolderBase]: For 2065075/2065090 co-relation queries the response was YES. [2024-06-27 20:32:29,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67021 conditions, 5204 events. 3243/5204 cut-off events. For 2065075/2065090 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31682 event pairs, 628 based on Foata normal form. 12/5208 useless extension candidates. Maximal degree in co-relation 66811. Up to 4417 conditions per place. [2024-06-27 20:32:29,595 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 447 selfloop transitions, 169 changer transitions 0/621 dead transitions. [2024-06-27 20:32:29,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 621 transitions, 9719 flow [2024-06-27 20:32:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:32:29,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:32:29,596 INFO L175 Difference]: Start difference. First operand has 454 places, 601 transitions, 7760 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:32:29,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 621 transitions, 9719 flow [2024-06-27 20:32:39,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 621 transitions, 9272 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:39,504 INFO L231 Difference]: Finished difference. Result has 458 places, 601 transitions, 7657 flow [2024-06-27 20:32:39,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7313, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7657, PETRI_PLACES=458, PETRI_TRANSITIONS=601} [2024-06-27 20:32:39,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-27 20:32:39,504 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 601 transitions, 7657 flow [2024-06-27 20:32:39,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:39,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:39,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:39,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:32:39,505 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:39,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:39,506 INFO L85 PathProgramCache]: Analyzing trace with hash 973543452, now seen corresponding path program 14 times [2024-06-27 20:32:39,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:39,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21453548] [2024-06-27 20:32:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:40,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:40,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21453548] [2024-06-27 20:32:40,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21453548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:40,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:40,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:40,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868138826] [2024-06-27 20:32:40,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:40,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:40,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:40,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:40,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 601 transitions, 7657 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:40,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:40,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:40,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:41,930 INFO L124 PetriNetUnfolderBase]: 3253/5200 cut-off events. [2024-06-27 20:32:41,930 INFO L125 PetriNetUnfolderBase]: For 2085318/2085333 co-relation queries the response was YES. [2024-06-27 20:32:42,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67118 conditions, 5200 events. 3253/5200 cut-off events. For 2085318/2085333 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31416 event pairs, 654 based on Foata normal form. 12/5204 useless extension candidates. Maximal degree in co-relation 66907. Up to 4427 conditions per place. [2024-06-27 20:32:42,025 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 463 selfloop transitions, 156 changer transitions 0/624 dead transitions. [2024-06-27 20:32:42,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 624 transitions, 9736 flow [2024-06-27 20:32:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:32:42,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:32:42,026 INFO L175 Difference]: Start difference. First operand has 458 places, 601 transitions, 7657 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:32:42,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 624 transitions, 9736 flow [2024-06-27 20:32:51,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 624 transitions, 9431 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:32:51,742 INFO L231 Difference]: Finished difference. Result has 460 places, 604 transitions, 7780 flow [2024-06-27 20:32:51,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7355, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7780, PETRI_PLACES=460, PETRI_TRANSITIONS=604} [2024-06-27 20:32:51,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-27 20:32:51,743 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 604 transitions, 7780 flow [2024-06-27 20:32:51,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:51,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:51,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:51,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:32:51,743 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:51,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash -70474757, now seen corresponding path program 23 times [2024-06-27 20:32:51,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:51,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84516595] [2024-06-27 20:32:51,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:52,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84516595] [2024-06-27 20:32:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84516595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:52,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:52,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021995265] [2024-06-27 20:32:52,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:52,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:52,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:52,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:52,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:52,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 604 transitions, 7780 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:52,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:52,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:52,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:54,184 INFO L124 PetriNetUnfolderBase]: 3279/5266 cut-off events. [2024-06-27 20:32:54,184 INFO L125 PetriNetUnfolderBase]: For 2134926/2134933 co-relation queries the response was YES. [2024-06-27 20:32:54,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67965 conditions, 5266 events. 3279/5266 cut-off events. For 2134926/2134933 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 32099 event pairs, 701 based on Foata normal form. 5/5256 useless extension candidates. Maximal degree in co-relation 67753. Up to 4240 conditions per place. [2024-06-27 20:32:54,280 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 406 selfloop transitions, 218 changer transitions 0/629 dead transitions. [2024-06-27 20:32:54,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 629 transitions, 10402 flow [2024-06-27 20:32:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:54,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:32:54,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:32:54,281 INFO L175 Difference]: Start difference. First operand has 460 places, 604 transitions, 7780 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:32:54,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 629 transitions, 10402 flow [2024-06-27 20:33:06,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 629 transitions, 10108 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:06,247 INFO L231 Difference]: Finished difference. Result has 464 places, 610 transitions, 8266 flow [2024-06-27 20:33:06,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7486, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8266, PETRI_PLACES=464, PETRI_TRANSITIONS=610} [2024-06-27 20:33:06,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-27 20:33:06,247 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 610 transitions, 8266 flow [2024-06-27 20:33:06,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:06,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:06,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:06,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:33:06,248 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:06,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1138533640, now seen corresponding path program 15 times [2024-06-27 20:33:06,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:06,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541170999] [2024-06-27 20:33:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:06,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:07,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:07,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541170999] [2024-06-27 20:33:07,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541170999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:07,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:07,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:07,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908397768] [2024-06-27 20:33:07,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:07,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:07,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:07,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:07,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:07,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:07,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 610 transitions, 8266 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:07,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:07,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:07,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:08,684 INFO L124 PetriNetUnfolderBase]: 3273/5250 cut-off events. [2024-06-27 20:33:08,685 INFO L125 PetriNetUnfolderBase]: For 2133590/2133605 co-relation queries the response was YES. [2024-06-27 20:33:08,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67875 conditions, 5250 events. 3273/5250 cut-off events. For 2133590/2133605 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31969 event pairs, 674 based on Foata normal form. 12/5254 useless extension candidates. Maximal degree in co-relation 67662. Up to 4458 conditions per place. [2024-06-27 20:33:08,780 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 154 changer transitions 0/630 dead transitions. [2024-06-27 20:33:08,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 630 transitions, 10255 flow [2024-06-27 20:33:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:33:08,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:33:08,782 INFO L175 Difference]: Start difference. First operand has 464 places, 610 transitions, 8266 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:33:08,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 630 transitions, 10255 flow [2024-06-27 20:33:20,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 630 transitions, 9684 flow, removed 99 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:20,582 INFO L231 Difference]: Finished difference. Result has 466 places, 610 transitions, 8009 flow [2024-06-27 20:33:20,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7695, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8009, PETRI_PLACES=466, PETRI_TRANSITIONS=610} [2024-06-27 20:33:20,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-27 20:33:20,583 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 610 transitions, 8009 flow [2024-06-27 20:33:20,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:20,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:20,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:20,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:33:20,583 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:20,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash 973387739, now seen corresponding path program 24 times [2024-06-27 20:33:20,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:20,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032295324] [2024-06-27 20:33:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:20,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:21,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:21,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032295324] [2024-06-27 20:33:21,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032295324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:21,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:21,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:21,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984659991] [2024-06-27 20:33:21,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:21,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:21,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:21,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:21,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:21,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:21,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 610 transitions, 8009 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:21,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:21,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:21,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:23,107 INFO L124 PetriNetUnfolderBase]: 3267/5219 cut-off events. [2024-06-27 20:33:23,107 INFO L125 PetriNetUnfolderBase]: For 2126864/2126868 co-relation queries the response was YES. [2024-06-27 20:33:23,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67005 conditions, 5219 events. 3267/5219 cut-off events. For 2126864/2126868 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31385 event pairs, 725 based on Foata normal form. 3/5210 useless extension candidates. Maximal degree in co-relation 66793. Up to 4754 conditions per place. [2024-06-27 20:33:23,201 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 546 selfloop transitions, 73 changer transitions 0/624 dead transitions. [2024-06-27 20:33:23,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 624 transitions, 9619 flow [2024-06-27 20:33:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:33:23,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:33:23,202 INFO L175 Difference]: Start difference. First operand has 466 places, 610 transitions, 8009 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:33:23,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 624 transitions, 9619 flow [2024-06-27 20:33:32,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 624 transitions, 9132 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:32,500 INFO L231 Difference]: Finished difference. Result has 469 places, 610 transitions, 7674 flow [2024-06-27 20:33:32,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7522, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7674, PETRI_PLACES=469, PETRI_TRANSITIONS=610} [2024-06-27 20:33:32,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-27 20:33:32,500 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 610 transitions, 7674 flow [2024-06-27 20:33:32,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:32,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:32,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:32,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:33:32,501 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:32,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash -63111544, now seen corresponding path program 16 times [2024-06-27 20:33:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:32,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567825200] [2024-06-27 20:33:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:33,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:33,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567825200] [2024-06-27 20:33:33,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567825200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:33,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:33,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:33,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426775885] [2024-06-27 20:33:33,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:33,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:33,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:33,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:33,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:33,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:33,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 610 transitions, 7674 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:33,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:33,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:33,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:34,963 INFO L124 PetriNetUnfolderBase]: 3261/5220 cut-off events. [2024-06-27 20:33:34,964 INFO L125 PetriNetUnfolderBase]: For 2122345/2122360 co-relation queries the response was YES. [2024-06-27 20:33:35,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66208 conditions, 5220 events. 3261/5220 cut-off events. For 2122345/2122360 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 31646 event pairs, 652 based on Foata normal form. 12/5224 useless extension candidates. Maximal degree in co-relation 65995. Up to 4445 conditions per place. [2024-06-27 20:33:35,060 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 470 selfloop transitions, 155 changer transitions 0/630 dead transitions. [2024-06-27 20:33:35,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 630 transitions, 9671 flow [2024-06-27 20:33:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:33:35,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:33:35,061 INFO L175 Difference]: Start difference. First operand has 469 places, 610 transitions, 7674 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:33:35,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 630 transitions, 9671 flow [2024-06-27 20:33:45,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 630 transitions, 9525 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:33:45,788 INFO L231 Difference]: Finished difference. Result has 470 places, 610 transitions, 7844 flow [2024-06-27 20:33:45,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7528, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7844, PETRI_PLACES=470, PETRI_TRANSITIONS=610} [2024-06-27 20:33:45,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-27 20:33:45,789 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 610 transitions, 7844 flow [2024-06-27 20:33:45,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:45,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:45,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:45,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:33:45,790 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:45,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:45,790 INFO L85 PathProgramCache]: Analyzing trace with hash -563597225, now seen corresponding path program 25 times [2024-06-27 20:33:45,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:45,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058169322] [2024-06-27 20:33:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:45,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:46,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:46,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058169322] [2024-06-27 20:33:46,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058169322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:46,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:46,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:46,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87010366] [2024-06-27 20:33:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:46,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:46,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:46,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 610 transitions, 7844 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:46,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:46,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:46,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:48,226 INFO L124 PetriNetUnfolderBase]: 3255/5264 cut-off events. [2024-06-27 20:33:48,226 INFO L125 PetriNetUnfolderBase]: For 2125600/2125607 co-relation queries the response was YES. [2024-06-27 20:33:48,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66270 conditions, 5264 events. 3255/5264 cut-off events. For 2125600/2125607 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 32489 event pairs, 668 based on Foata normal form. 5/5254 useless extension candidates. Maximal degree in co-relation 66056. Up to 4214 conditions per place. [2024-06-27 20:33:48,325 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 392 selfloop transitions, 232 changer transitions 0/629 dead transitions. [2024-06-27 20:33:48,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 629 transitions, 10152 flow [2024-06-27 20:33:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:33:48,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 20:33:48,326 INFO L175 Difference]: Start difference. First operand has 470 places, 610 transitions, 7844 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:33:48,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 629 transitions, 10152 flow [2024-06-27 20:33:58,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 629 transitions, 9854 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:58,994 INFO L231 Difference]: Finished difference. Result has 474 places, 610 transitions, 8016 flow [2024-06-27 20:33:58,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7546, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8016, PETRI_PLACES=474, PETRI_TRANSITIONS=610} [2024-06-27 20:33:58,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-27 20:33:58,995 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 610 transitions, 8016 flow [2024-06-27 20:33:58,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:58,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:58,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:58,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:33:58,995 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:58,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1138533237, now seen corresponding path program 26 times [2024-06-27 20:33:58,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:58,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564758434] [2024-06-27 20:33:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:58,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:59,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:59,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564758434] [2024-06-27 20:33:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564758434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:59,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:59,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381472172] [2024-06-27 20:33:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:59,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:59,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:59,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:34:00,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:00,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 610 transitions, 8016 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:00,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:00,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:00,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:01,429 INFO L124 PetriNetUnfolderBase]: 3249/5224 cut-off events. [2024-06-27 20:34:01,429 INFO L125 PetriNetUnfolderBase]: For 2121821/2121828 co-relation queries the response was YES. [2024-06-27 20:34:01,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66136 conditions, 5224 events. 3249/5224 cut-off events. For 2121821/2121828 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31877 event pairs, 688 based on Foata normal form. 5/5214 useless extension candidates. Maximal degree in co-relation 65921. Up to 4209 conditions per place. [2024-06-27 20:34:01,748 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 397 selfloop transitions, 226 changer transitions 0/628 dead transitions. [2024-06-27 20:34:01,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 628 transitions, 10002 flow [2024-06-27 20:34:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:34:01,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:34:01,750 INFO L175 Difference]: Start difference. First operand has 474 places, 610 transitions, 8016 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:34:01,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 628 transitions, 10002 flow [2024-06-27 20:34:11,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 628 transitions, 9216 flow, removed 128 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:11,467 INFO L231 Difference]: Finished difference. Result has 476 places, 610 transitions, 7688 flow [2024-06-27 20:34:11,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7230, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7688, PETRI_PLACES=476, PETRI_TRANSITIONS=610} [2024-06-27 20:34:11,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-27 20:34:11,468 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 610 transitions, 7688 flow [2024-06-27 20:34:11,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:11,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:11,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:11,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:34:11,468 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:11,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash -70463597, now seen corresponding path program 27 times [2024-06-27 20:34:11,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:11,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831649981] [2024-06-27 20:34:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:11,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:12,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831649981] [2024-06-27 20:34:12,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831649981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:12,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:12,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:34:12,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473413901] [2024-06-27 20:34:12,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:12,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:34:12,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:12,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:34:12,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:34:12,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:12,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 610 transitions, 7688 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:12,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:12,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:12,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:13,852 INFO L124 PetriNetUnfolderBase]: 3243/5218 cut-off events. [2024-06-27 20:34:13,852 INFO L125 PetriNetUnfolderBase]: For 2112575/2112582 co-relation queries the response was YES. [2024-06-27 20:34:13,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65386 conditions, 5218 events. 3243/5218 cut-off events. For 2112575/2112582 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31813 event pairs, 690 based on Foata normal form. 5/5208 useless extension candidates. Maximal degree in co-relation 65170. Up to 4204 conditions per place. [2024-06-27 20:34:13,946 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 406 selfloop transitions, 217 changer transitions 0/628 dead transitions. [2024-06-27 20:34:13,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 628 transitions, 9678 flow [2024-06-27 20:34:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:13,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:34:13,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 20:34:13,947 INFO L175 Difference]: Start difference. First operand has 476 places, 610 transitions, 7688 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:34:13,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 628 transitions, 9678 flow [2024-06-27 20:34:25,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 628 transitions, 8880 flow, removed 81 selfloop flow, removed 9 redundant places. [2024-06-27 20:34:25,717 INFO L231 Difference]: Finished difference. Result has 476 places, 610 transitions, 7330 flow [2024-06-27 20:34:25,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6890, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7330, PETRI_PLACES=476, PETRI_TRANSITIONS=610} [2024-06-27 20:34:25,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-27 20:34:25,717 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 610 transitions, 7330 flow [2024-06-27 20:34:25,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:25,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:25,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:25,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:34:25,718 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:25,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash 73415773, now seen corresponding path program 28 times [2024-06-27 20:34:25,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:25,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107483386] [2024-06-27 20:34:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:26,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:26,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107483386] [2024-06-27 20:34:26,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107483386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:26,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:26,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:34:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522790253] [2024-06-27 20:34:26,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:26,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:34:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:26,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:34:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:34:26,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:26,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 610 transitions, 7330 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:26,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:26,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:26,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:28,275 INFO L124 PetriNetUnfolderBase]: 3253/5232 cut-off events. [2024-06-27 20:34:28,275 INFO L125 PetriNetUnfolderBase]: For 2135483/2135490 co-relation queries the response was YES. [2024-06-27 20:34:28,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65188 conditions, 5232 events. 3253/5232 cut-off events. For 2135483/2135490 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 31933 event pairs, 704 based on Foata normal form. 5/5222 useless extension candidates. Maximal degree in co-relation 64972. Up to 4214 conditions per place. [2024-06-27 20:34:28,362 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 225 changer transitions 0/631 dead transitions. [2024-06-27 20:34:28,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 631 transitions, 9488 flow [2024-06-27 20:34:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:34:28,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:34:28,363 INFO L175 Difference]: Start difference. First operand has 476 places, 610 transitions, 7330 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:34:28,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 631 transitions, 9488 flow [2024-06-27 20:34:38,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 631 transitions, 9098 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:38,532 INFO L231 Difference]: Finished difference. Result has 478 places, 613 transitions, 7554 flow [2024-06-27 20:34:38,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6943, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7554, PETRI_PLACES=478, PETRI_TRANSITIONS=613} [2024-06-27 20:34:38,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-27 20:34:38,532 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 613 transitions, 7554 flow [2024-06-27 20:34:38,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:38,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:38,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:38,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:34:38,533 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:38,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:38,533 INFO L85 PathProgramCache]: Analyzing trace with hash 73426933, now seen corresponding path program 29 times [2024-06-27 20:34:38,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:38,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275264884] [2024-06-27 20:34:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:38,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:39,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:39,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275264884] [2024-06-27 20:34:39,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275264884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:39,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:39,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:34:39,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035457824] [2024-06-27 20:34:39,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:39,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:34:39,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:34:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:34:39,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:39,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 613 transitions, 7554 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:39,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:39,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:39,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:40,984 INFO L124 PetriNetUnfolderBase]: 3247/5230 cut-off events. [2024-06-27 20:34:40,985 INFO L125 PetriNetUnfolderBase]: For 2132972/2132979 co-relation queries the response was YES. [2024-06-27 20:34:41,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64910 conditions, 5230 events. 3247/5230 cut-off events. For 2132972/2132979 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31973 event pairs, 704 based on Foata normal form. 5/5220 useless extension candidates. Maximal degree in co-relation 64693. Up to 4209 conditions per place. [2024-06-27 20:34:41,082 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 402 selfloop transitions, 223 changer transitions 0/630 dead transitions. [2024-06-27 20:34:41,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 630 transitions, 9224 flow [2024-06-27 20:34:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:34:41,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:34:41,083 INFO L175 Difference]: Start difference. First operand has 478 places, 613 transitions, 7554 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:34:41,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 630 transitions, 9224 flow [2024-06-27 20:34:50,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 630 transitions, 8402 flow, removed 134 selfloop flow, removed 8 redundant places. [2024-06-27 20:34:50,955 INFO L231 Difference]: Finished difference. Result has 479 places, 613 transitions, 7184 flow [2024-06-27 20:34:50,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6732, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7184, PETRI_PLACES=479, PETRI_TRANSITIONS=613} [2024-06-27 20:34:50,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-27 20:34:50,956 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 613 transitions, 7184 flow [2024-06-27 20:34:50,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:50,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:50,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:50,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 20:34:50,956 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:50,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1125646630, now seen corresponding path program 17 times [2024-06-27 20:34:50,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:50,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319976495] [2024-06-27 20:34:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:50,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:51,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:51,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319976495] [2024-06-27 20:34:51,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319976495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:51,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:51,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:34:51,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842317765] [2024-06-27 20:34:51,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:51,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:34:51,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:51,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:34:51,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:34:52,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:52,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 613 transitions, 7184 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:52,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:52,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:52,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:53,628 INFO L124 PetriNetUnfolderBase]: 3241/5202 cut-off events. [2024-06-27 20:34:53,628 INFO L125 PetriNetUnfolderBase]: For 2119958/2119973 co-relation queries the response was YES. [2024-06-27 20:34:53,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64175 conditions, 5202 events. 3241/5202 cut-off events. For 2119958/2119973 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31657 event pairs, 661 based on Foata normal form. 12/5206 useless extension candidates. Maximal degree in co-relation 63957. Up to 4422 conditions per place. [2024-06-27 20:34:53,714 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 155 changer transitions 0/632 dead transitions. [2024-06-27 20:34:53,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 632 transitions, 8875 flow [2024-06-27 20:34:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:34:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:34:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:34:53,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:34:53,716 INFO L175 Difference]: Start difference. First operand has 479 places, 613 transitions, 7184 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:34:53,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 632 transitions, 8875 flow [2024-06-27 20:35:04,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 632 transitions, 8226 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-06-27 20:35:04,164 INFO L231 Difference]: Finished difference. Result has 478 places, 613 transitions, 6851 flow [2024-06-27 20:35:04,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6535, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6851, PETRI_PLACES=478, PETRI_TRANSITIONS=613} [2024-06-27 20:35:04,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-27 20:35:04,165 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 613 transitions, 6851 flow [2024-06-27 20:35:04,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:04,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:04,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 20:35:04,165 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:04,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:04,166 INFO L85 PathProgramCache]: Analyzing trace with hash -563596822, now seen corresponding path program 18 times [2024-06-27 20:35:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:04,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436412504] [2024-06-27 20:35:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:04,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:05,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436412504] [2024-06-27 20:35:05,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436412504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:05,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:05,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:05,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212176890] [2024-06-27 20:35:05,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:05,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:05,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:05,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:05,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:35:05,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 613 transitions, 6851 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:05,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:05,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:35:05,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:06,519 INFO L124 PetriNetUnfolderBase]: 3235/5202 cut-off events. [2024-06-27 20:35:06,519 INFO L125 PetriNetUnfolderBase]: For 2115122/2115137 co-relation queries the response was YES. [2024-06-27 20:35:06,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63495 conditions, 5202 events. 3235/5202 cut-off events. For 2115122/2115137 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 31765 event pairs, 644 based on Foata normal form. 12/5206 useless extension candidates. Maximal degree in co-relation 63276. Up to 4417 conditions per place. [2024-06-27 20:35:06,619 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 160 changer transitions 0/632 dead transitions. [2024-06-27 20:35:06,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 632 transitions, 8544 flow [2024-06-27 20:35:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:35:06,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:35:06,621 INFO L175 Difference]: Start difference. First operand has 478 places, 613 transitions, 6851 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:35:06,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 632 transitions, 8544 flow [2024-06-27 20:35:17,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 632 transitions, 8220 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 20:35:17,193 INFO L231 Difference]: Finished difference. Result has 481 places, 613 transitions, 6853 flow [2024-06-27 20:35:17,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6527, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6853, PETRI_PLACES=481, PETRI_TRANSITIONS=613} [2024-06-27 20:35:17,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-27 20:35:17,194 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 613 transitions, 6853 flow [2024-06-27 20:35:17,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:17,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:17,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:17,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 20:35:17,194 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:17,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -135233242, now seen corresponding path program 19 times [2024-06-27 20:35:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:17,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748790325] [2024-06-27 20:35:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:17,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:18,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:18,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748790325] [2024-06-27 20:35:18,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748790325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:18,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:18,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:18,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786690083] [2024-06-27 20:35:18,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:18,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:18,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:18,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:18,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:35:18,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 613 transitions, 6853 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:18,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:18,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:35:18,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:19,596 INFO L124 PetriNetUnfolderBase]: 3245/5216 cut-off events. [2024-06-27 20:35:19,596 INFO L125 PetriNetUnfolderBase]: For 2139626/2139641 co-relation queries the response was YES. [2024-06-27 20:35:19,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63760 conditions, 5216 events. 3245/5216 cut-off events. For 2139626/2139641 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 31891 event pairs, 629 based on Foata normal form. 12/5220 useless extension candidates. Maximal degree in co-relation 63540. Up to 4427 conditions per place. [2024-06-27 20:35:19,695 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 455 selfloop transitions, 176 changer transitions 0/636 dead transitions. [2024-06-27 20:35:19,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 636 transitions, 8687 flow [2024-06-27 20:35:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:19,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:35:19,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:35:19,696 INFO L175 Difference]: Start difference. First operand has 481 places, 613 transitions, 6853 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:35:19,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 636 transitions, 8687 flow [2024-06-27 20:35:30,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 636 transitions, 8341 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:30,097 INFO L231 Difference]: Finished difference. Result has 483 places, 617 transitions, 6996 flow [2024-06-27 20:35:30,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6996, PETRI_PLACES=483, PETRI_TRANSITIONS=617} [2024-06-27 20:35:30,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-27 20:35:30,098 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 617 transitions, 6996 flow [2024-06-27 20:35:30,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:30,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:30,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:30,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 20:35:30,099 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:30,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:30,099 INFO L85 PathProgramCache]: Analyzing trace with hash -563717195, now seen corresponding path program 30 times [2024-06-27 20:35:30,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:30,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620166876] [2024-06-27 20:35:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:30,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:31,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:31,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620166876] [2024-06-27 20:35:31,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620166876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:31,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:31,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:31,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285561505] [2024-06-27 20:35:31,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:31,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:31,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:31,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:31,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:31,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:35:31,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 617 transitions, 6996 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:31,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:31,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:35:31,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:32,566 INFO L124 PetriNetUnfolderBase]: 3239/5187 cut-off events. [2024-06-27 20:35:32,566 INFO L125 PetriNetUnfolderBase]: For 2132369/2132373 co-relation queries the response was YES. [2024-06-27 20:35:32,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63458 conditions, 5187 events. 3239/5187 cut-off events. For 2132369/2132373 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 31321 event pairs, 719 based on Foata normal form. 3/5178 useless extension candidates. Maximal degree in co-relation 63237. Up to 4747 conditions per place. [2024-06-27 20:35:32,669 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 560 selfloop transitions, 64 changer transitions 0/629 dead transitions. [2024-06-27 20:35:32,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 629 transitions, 8284 flow [2024-06-27 20:35:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:35:32,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 20:35:32,670 INFO L175 Difference]: Start difference. First operand has 483 places, 617 transitions, 6996 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:35:32,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 629 transitions, 8284 flow Killed by 15