./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix028_tso.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/mix028_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix028_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:13:48,465 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:13:48,528 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:13:48,535 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:13:48,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:13:48,559 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:13:48,560 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:13:48,561 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:13:48,561 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:13:48,568 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:13:48,568 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:13:48,568 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:13:48,569 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:13:48,569 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:13:48,569 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:13:48,569 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:13:48,570 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:13:48,570 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:13:48,570 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:13:48,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:13:48,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:13:48,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:13:48,571 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:13:48,571 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:13:48,571 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:13:48,571 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:13:48,572 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:13:48,572 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:13:48,572 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:13:48,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:13:48,573 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:13:48,574 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:13:48,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:13:48,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:13:48,574 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:13:48,574 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:13:48,574 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:13:48,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:13:48,575 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:13:48,575 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:13:48,575 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:13:48,575 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:13:48,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:13:48,576 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:13:48,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:13:48,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:13:48,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:13:48,774 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:13:48,775 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:13:48,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-28 03:13:49,960 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:13:50,219 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:13:50,221 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_tso.i [2024-06-28 03:13:50,239 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/030951c84/91a755d3ec6b47bb844c7b6c35d16098/FLAGdc9efe8d0 [2024-06-28 03:13:50,250 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/030951c84/91a755d3ec6b47bb844c7b6c35d16098 [2024-06-28 03:13:50,254 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:13:50,255 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:13:50,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix028_tso.yml/witness.yml [2024-06-28 03:13:50,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:13:50,414 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:13:50,415 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:13:50,415 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:13:50,419 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:13:50,419 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:13:50" (1/2) ... [2024-06-28 03:13:50,420 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1c7663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:13:50, skipping insertion in model container [2024-06-28 03:13:50,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:13:50" (1/2) ... [2024-06-28 03:13:50,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1bdf6fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:13:50, skipping insertion in model container [2024-06-28 03:13:50,421 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:13:50" (2/2) ... [2024-06-28 03:13:50,422 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1c7663 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:50, skipping insertion in model container [2024-06-28 03:13:50,422 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:13:50" (2/2) ... [2024-06-28 03:13:50,423 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:13:50,516 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:13:50,517 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] (((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) [2024-06-28 03:13:50,517 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) [2024-06-28 03:13:50,517 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && (z == 0 || z == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) [2024-06-28 03:13:50,517 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:13:50,518 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-28 03:13:50,557 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:13:50,915 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:13:50,924 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:13:51,055 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:13:51,087 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:13:51,088 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51 WrapperNode [2024-06-28 03:13:51,088 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:13:51,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:13:51,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:13:51,090 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:13:51,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,165 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 166 [2024-06-28 03:13:51,165 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:13:51,166 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:13:51,167 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:13:51,167 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:13:51,175 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,186 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,198 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]. [2024-06-28 03:13:51,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,199 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,207 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,210 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,211 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:13:51,216 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:13:51,216 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:13:51,216 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:13:51,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (1/1) ... [2024-06-28 03:13:51,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:13:51,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:13:51,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-28 03:13:51,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-28 03:13:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:13:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:13:51,286 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:13:51,287 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:13:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:13:51,287 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:13:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:13:51,287 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:13:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:13:51,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:13:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:13:51,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:13:51,289 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:13:51,402 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:13:51,404 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:13:51,667 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:13:51,667 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:13:51,780 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:13:51,780 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:13:51,781 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:13:51 BoogieIcfgContainer [2024-06-28 03:13:51,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:13:51,783 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:13:51,783 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:13:51,786 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:13:51,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:13:50" (1/4) ... [2024-06-28 03:13:51,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f581e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:13:51, skipping insertion in model container [2024-06-28 03:13:51,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:13:50" (2/4) ... [2024-06-28 03:13:51,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f581e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:13:51, skipping insertion in model container [2024-06-28 03:13:51,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:13:51" (3/4) ... [2024-06-28 03:13:51,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f581e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:13:51, skipping insertion in model container [2024-06-28 03:13:51,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:13:51" (4/4) ... [2024-06-28 03:13:51,788 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_tso.i [2024-06-28 03:13:51,801 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:13:51,801 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:13:51,802 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:13:51,841 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:13:51,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 03:13:51,899 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-28 03:13:51,899 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:13:51,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:13:51,901 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 03:13:51,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-28 03:13:51,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:13:51,917 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;@6d23c599, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:13:51,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:13:51,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:13:51,920 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:13:51,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:13:51,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:51,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:13:51,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:51,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash 399969166, now seen corresponding path program 1 times [2024-06-28 03:13:51,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:51,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508631187] [2024-06-28 03:13:51,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:51,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:52,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:52,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508631187] [2024-06-28 03:13:52,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508631187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:52,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:52,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:13:52,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134486239] [2024-06-28 03:13:52,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:52,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:13:52,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:52,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:13:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:13:52,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 03:13:52,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:52,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:52,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 03:13:52,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:53,229 INFO L124 PetriNetUnfolderBase]: 1359/2109 cut-off events. [2024-06-28 03:13:53,230 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 03:13:53,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4223 conditions, 2109 events. 1359/2109 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10198 event pairs, 941 based on Foata normal form. 1/2045 useless extension candidates. Maximal degree in co-relation 4211. Up to 2029 conditions per place. [2024-06-28 03:13:53,244 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-28 03:13:53,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-28 03:13:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:13:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:13:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 03:13:53,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-28 03:13:53,255 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-28 03:13:53,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-28 03:13:53,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:13:53,260 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-28 03:13:53,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-28 03:13:53,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-28 03:13:53,265 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-28 03:13:53,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:53,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:53,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:53,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:13:53,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:53,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:53,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2118308141, now seen corresponding path program 1 times [2024-06-28 03:13:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:53,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577031688] [2024-06-28 03:13:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:53,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:53,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:53,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577031688] [2024-06-28 03:13:53,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577031688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:53,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:53,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:13:53,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274829325] [2024-06-28 03:13:53,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:53,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:13:53,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:53,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:13:53,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:13:53,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:13:53,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:53,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:53,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:13:53,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:54,111 INFO L124 PetriNetUnfolderBase]: 1560/2337 cut-off events. [2024-06-28 03:13:54,111 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-06-28 03:13:54,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5353 conditions, 2337 events. 1560/2337 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10932 event pairs, 930 based on Foata normal form. 3/2339 useless extension candidates. Maximal degree in co-relation 5341. Up to 2302 conditions per place. [2024-06-28 03:13:54,121 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-28 03:13:54,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-28 03:13:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:13:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:13:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-28 03:13:54,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-28 03:13:54,123 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 90 transitions. [2024-06-28 03:13:54,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-28 03:13:54,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:13:54,124 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-28 03:13:54,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-28 03:13:54,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-28 03:13:54,125 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-28 03:13:54,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:54,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:54,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:54,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:13:54,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:54,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:54,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1243043897, now seen corresponding path program 1 times [2024-06-28 03:13:54,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:54,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644434258] [2024-06-28 03:13:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:54,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:54,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:54,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644434258] [2024-06-28 03:13:54,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644434258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:54,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:54,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:13:54,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100394902] [2024-06-28 03:13:54,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:54,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:13:54,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:13:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:13:54,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:13:54,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:54,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:54,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:13:54,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:54,961 INFO L124 PetriNetUnfolderBase]: 1568/2357 cut-off events. [2024-06-28 03:13:54,961 INFO L125 PetriNetUnfolderBase]: For 1342/1342 co-relation queries the response was YES. [2024-06-28 03:13:54,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 2357 events. 1568/2357 cut-off events. For 1342/1342 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11219 event pairs, 669 based on Foata normal form. 5/2361 useless extension candidates. Maximal degree in co-relation 5976. Up to 2248 conditions per place. [2024-06-28 03:13:54,971 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-28 03:13:54,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 394 flow [2024-06-28 03:13:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:13:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:13:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 03:13:54,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-28 03:13:54,973 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 118 transitions. [2024-06-28 03:13:54,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 394 flow [2024-06-28 03:13:54,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 380 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 03:13:54,975 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-28 03:13:54,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-28 03:13:54,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-28 03:13:54,976 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-28 03:13:54,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:54,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:54,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:54,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:13:54,977 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:54,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1154035042, now seen corresponding path program 1 times [2024-06-28 03:13:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:54,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617562873] [2024-06-28 03:13:54,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:54,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:55,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:55,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617562873] [2024-06-28 03:13:55,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617562873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:55,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:55,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:13:55,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184987615] [2024-06-28 03:13:55,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:55,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:13:55,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:55,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:13:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:13:55,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 03:13:55,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:55,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:55,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 03:13:55,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:55,936 INFO L124 PetriNetUnfolderBase]: 1580/2377 cut-off events. [2024-06-28 03:13:55,936 INFO L125 PetriNetUnfolderBase]: For 3185/3187 co-relation queries the response was YES. [2024-06-28 03:13:55,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7134 conditions, 2377 events. 1580/2377 cut-off events. For 3185/3187 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11367 event pairs, 481 based on Foata normal form. 12/2388 useless extension candidates. Maximal degree in co-relation 7117. Up to 2216 conditions per place. [2024-06-28 03:13:55,951 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 57 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-28 03:13:55,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 497 flow [2024-06-28 03:13:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:13:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:13:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-28 03:13:55,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-28 03:13:55,953 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 135 transitions. [2024-06-28 03:13:55,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 497 flow [2024-06-28 03:13:55,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 489 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 03:13:55,957 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 291 flow [2024-06-28 03:13:55,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-28 03:13:55,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-28 03:13:55,958 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 291 flow [2024-06-28 03:13:55,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:55,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:55,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:55,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:13:55,959 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:55,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash 123911033, now seen corresponding path program 1 times [2024-06-28 03:13:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:55,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513768258] [2024-06-28 03:13:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:56,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:56,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513768258] [2024-06-28 03:13:56,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513768258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:56,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:56,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:13:56,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908771915] [2024-06-28 03:13:56,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:56,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:13:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:13:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:13:56,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:13:56,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:56,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:56,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:13:56,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:56,820 INFO L124 PetriNetUnfolderBase]: 1368/2118 cut-off events. [2024-06-28 03:13:56,820 INFO L125 PetriNetUnfolderBase]: For 4021/4021 co-relation queries the response was YES. [2024-06-28 03:13:56,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6889 conditions, 2118 events. 1368/2118 cut-off events. For 4021/4021 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10397 event pairs, 562 based on Foata normal form. 2/2099 useless extension candidates. Maximal degree in co-relation 6868. Up to 2036 conditions per place. [2024-06-28 03:13:56,831 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-28 03:13:56,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 433 flow [2024-06-28 03:13:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:13:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:13:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-28 03:13:56,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:13:56,833 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 291 flow. Second operand 5 states and 90 transitions. [2024-06-28 03:13:56,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 433 flow [2024-06-28 03:13:56,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 62 transitions, 383 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 03:13:56,838 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 265 flow [2024-06-28 03:13:56,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-28 03:13:56,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-28 03:13:56,841 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 265 flow [2024-06-28 03:13:56,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:56,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:56,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:56,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:13:56,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:56,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash -454848311, now seen corresponding path program 1 times [2024-06-28 03:13:56,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:56,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507624321] [2024-06-28 03:13:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:56,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:57,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:57,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507624321] [2024-06-28 03:13:57,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507624321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:57,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:57,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:13:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151446717] [2024-06-28 03:13:57,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:57,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:13:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:13:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:13:57,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:13:57,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:57,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:57,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:13:57,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:57,815 INFO L124 PetriNetUnfolderBase]: 1358/2140 cut-off events. [2024-06-28 03:13:57,816 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-06-28 03:13:57,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6907 conditions, 2140 events. 1358/2140 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10571 event pairs, 526 based on Foata normal form. 4/2135 useless extension candidates. Maximal degree in co-relation 6884. Up to 2004 conditions per place. [2024-06-28 03:13:57,830 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-28 03:13:57,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 453 flow [2024-06-28 03:13:57,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:13:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:13:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 03:13:57,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-28 03:13:57,832 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 265 flow. Second operand 6 states and 107 transitions. [2024-06-28 03:13:57,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 453 flow [2024-06-28 03:13:57,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 431 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 03:13:57,837 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-28 03:13:57,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-28 03:13:57,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-28 03:13:57,840 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-28 03:13:57,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:57,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:57,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:57,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:13:57,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:57,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1649140628, now seen corresponding path program 1 times [2024-06-28 03:13:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:57,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673602233] [2024-06-28 03:13:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:57,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:58,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:58,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673602233] [2024-06-28 03:13:58,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673602233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:58,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:58,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:13:58,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642242701] [2024-06-28 03:13:58,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:58,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:13:58,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:13:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:13:58,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:58,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:58,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:58,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:58,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:58,905 INFO L124 PetriNetUnfolderBase]: 1571/2365 cut-off events. [2024-06-28 03:13:58,905 INFO L125 PetriNetUnfolderBase]: For 7224/7228 co-relation queries the response was YES. [2024-06-28 03:13:58,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8339 conditions, 2365 events. 1571/2365 cut-off events. For 7224/7228 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11152 event pairs, 635 based on Foata normal form. 8/2372 useless extension candidates. Maximal degree in co-relation 8316. Up to 2253 conditions per place. [2024-06-28 03:13:58,920 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 54 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-28 03:13:58,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 539 flow [2024-06-28 03:13:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:13:58,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:13:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 03:13:58,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-28 03:13:58,921 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 6 states and 110 transitions. [2024-06-28 03:13:58,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 539 flow [2024-06-28 03:13:58,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 509 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 03:13:58,927 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 339 flow [2024-06-28 03:13:58,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-28 03:13:58,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-28 03:13:58,928 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 339 flow [2024-06-28 03:13:58,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:58,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:58,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:58,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:13:58,929 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:58,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:58,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1180546856, now seen corresponding path program 2 times [2024-06-28 03:13:58,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:58,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427255906] [2024-06-28 03:13:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:58,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:13:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:13:59,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:13:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427255906] [2024-06-28 03:13:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427255906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:13:59,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:13:59,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:13:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091936803] [2024-06-28 03:13:59,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:13:59,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:13:59,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:13:59,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:13:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:13:59,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:13:59,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:59,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:13:59,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:13:59,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:13:59,900 INFO L124 PetriNetUnfolderBase]: 1559/2338 cut-off events. [2024-06-28 03:13:59,901 INFO L125 PetriNetUnfolderBase]: For 8650/8654 co-relation queries the response was YES. [2024-06-28 03:13:59,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8508 conditions, 2338 events. 1559/2338 cut-off events. For 8650/8654 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10921 event pairs, 649 based on Foata normal form. 3/2338 useless extension candidates. Maximal degree in co-relation 8484. Up to 2237 conditions per place. [2024-06-28 03:13:59,923 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 48 selfloop transitions, 20 changer transitions 0/72 dead transitions. [2024-06-28 03:13:59,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 513 flow [2024-06-28 03:13:59,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:13:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:13:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 03:13:59,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-28 03:13:59,934 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 339 flow. Second operand 6 states and 106 transitions. [2024-06-28 03:13:59,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 513 flow [2024-06-28 03:13:59,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 484 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:13:59,939 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 358 flow [2024-06-28 03:13:59,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=358, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-28 03:13:59,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-28 03:13:59,939 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 358 flow [2024-06-28 03:13:59,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:13:59,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:13:59,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:13:59,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:13:59,940 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:13:59,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:13:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1732407818, now seen corresponding path program 1 times [2024-06-28 03:13:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:13:59,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176564319] [2024-06-28 03:13:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:13:59,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:13:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:00,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:00,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176564319] [2024-06-28 03:14:00,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176564319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:00,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:00,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:00,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356792514] [2024-06-28 03:14:00,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:00,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:00,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:00,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:00,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:00,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:00,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 358 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:00,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:00,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:00,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:00,974 INFO L124 PetriNetUnfolderBase]: 1733/2611 cut-off events. [2024-06-28 03:14:00,974 INFO L125 PetriNetUnfolderBase]: For 11528/11528 co-relation queries the response was YES. [2024-06-28 03:14:00,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9886 conditions, 2611 events. 1733/2611 cut-off events. For 11528/11528 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12489 event pairs, 546 based on Foata normal form. 8/2617 useless extension candidates. Maximal degree in co-relation 9861. Up to 2237 conditions per place. [2024-06-28 03:14:00,987 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 79 selfloop transitions, 39 changer transitions 0/122 dead transitions. [2024-06-28 03:14:00,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 122 transitions, 995 flow [2024-06-28 03:14:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:14:00,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-28 03:14:00,988 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 358 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:14:00,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 122 transitions, 995 flow [2024-06-28 03:14:00,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 122 transitions, 869 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:00,999 INFO L231 Difference]: Finished difference. Result has 68 places, 81 transitions, 579 flow [2024-06-28 03:14:00,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=68, PETRI_TRANSITIONS=81} [2024-06-28 03:14:00,999 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-28 03:14:01,000 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 81 transitions, 579 flow [2024-06-28 03:14:01,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:01,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:01,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:01,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:14:01,000 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:01,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:01,001 INFO L85 PathProgramCache]: Analyzing trace with hash -416246752, now seen corresponding path program 2 times [2024-06-28 03:14:01,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:01,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517355193] [2024-06-28 03:14:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:01,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:01,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517355193] [2024-06-28 03:14:01,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517355193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:01,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:01,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:01,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73167859] [2024-06-28 03:14:01,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:01,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:01,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:01,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:01,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:01,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:01,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:01,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:02,143 INFO L124 PetriNetUnfolderBase]: 1805/2725 cut-off events. [2024-06-28 03:14:02,143 INFO L125 PetriNetUnfolderBase]: For 14982/14984 co-relation queries the response was YES. [2024-06-28 03:14:02,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11341 conditions, 2725 events. 1805/2725 cut-off events. For 14982/14984 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13155 event pairs, 550 based on Foata normal form. 12/2735 useless extension candidates. Maximal degree in co-relation 11312. Up to 2285 conditions per place. [2024-06-28 03:14:02,155 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 65 selfloop transitions, 48 changer transitions 0/117 dead transitions. [2024-06-28 03:14:02,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1001 flow [2024-06-28 03:14:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:14:02,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-28 03:14:02,158 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 579 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:14:02,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1001 flow [2024-06-28 03:14:02,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 973 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 03:14:02,169 INFO L231 Difference]: Finished difference. Result has 73 places, 88 transitions, 732 flow [2024-06-28 03:14:02,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=732, PETRI_PLACES=73, PETRI_TRANSITIONS=88} [2024-06-28 03:14:02,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-28 03:14:02,171 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 88 transitions, 732 flow [2024-06-28 03:14:02,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:02,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:02,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:02,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:14:02,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:02,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:02,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2057991610, now seen corresponding path program 3 times [2024-06-28 03:14:02,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:02,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89393744] [2024-06-28 03:14:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:02,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:02,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:02,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89393744] [2024-06-28 03:14:02,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89393744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:02,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:02,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:02,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834222174] [2024-06-28 03:14:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:02,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:02,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:02,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:02,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:02,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 88 transitions, 732 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:02,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:02,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:02,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:03,424 INFO L124 PetriNetUnfolderBase]: 1841/2768 cut-off events. [2024-06-28 03:14:03,424 INFO L125 PetriNetUnfolderBase]: For 18284/18290 co-relation queries the response was YES. [2024-06-28 03:14:03,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12341 conditions, 2768 events. 1841/2768 cut-off events. For 18284/18290 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13309 event pairs, 560 based on Foata normal form. 7/2768 useless extension candidates. Maximal degree in co-relation 12310. Up to 2301 conditions per place. [2024-06-28 03:14:03,439 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 60 changer transitions 0/126 dead transitions. [2024-06-28 03:14:03,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 126 transitions, 1266 flow [2024-06-28 03:14:03,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:14:03,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-28 03:14:03,442 INFO L175 Difference]: Start difference. First operand has 73 places, 88 transitions, 732 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:14:03,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 126 transitions, 1266 flow [2024-06-28 03:14:03,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 126 transitions, 1150 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:03,460 INFO L231 Difference]: Finished difference. Result has 76 places, 98 transitions, 880 flow [2024-06-28 03:14:03,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=880, PETRI_PLACES=76, PETRI_TRANSITIONS=98} [2024-06-28 03:14:03,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-28 03:14:03,461 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 98 transitions, 880 flow [2024-06-28 03:14:03,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:03,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:03,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:03,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:14:03,461 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:03,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:03,462 INFO L85 PathProgramCache]: Analyzing trace with hash -411605122, now seen corresponding path program 4 times [2024-06-28 03:14:03,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:03,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593086016] [2024-06-28 03:14:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:03,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:04,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:04,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593086016] [2024-06-28 03:14:04,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593086016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:04,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:04,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:04,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173984719] [2024-06-28 03:14:04,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:04,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:04,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:04,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:04,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:04,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 98 transitions, 880 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:04,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:04,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:04,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:04,657 INFO L124 PetriNetUnfolderBase]: 1825/2751 cut-off events. [2024-06-28 03:14:04,657 INFO L125 PetriNetUnfolderBase]: For 18506/18512 co-relation queries the response was YES. [2024-06-28 03:14:04,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12164 conditions, 2751 events. 1825/2751 cut-off events. For 18506/18512 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13207 event pairs, 569 based on Foata normal form. 7/2750 useless extension candidates. Maximal degree in co-relation 12132. Up to 2294 conditions per place. [2024-06-28 03:14:04,674 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 58 changer transitions 0/124 dead transitions. [2024-06-28 03:14:04,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 1240 flow [2024-06-28 03:14:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-28 03:14:04,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-28 03:14:04,676 INFO L175 Difference]: Start difference. First operand has 76 places, 98 transitions, 880 flow. Second operand 7 states and 130 transitions. [2024-06-28 03:14:04,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 1240 flow [2024-06-28 03:14:04,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1144 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:04,747 INFO L231 Difference]: Finished difference. Result has 80 places, 98 transitions, 910 flow [2024-06-28 03:14:04,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=910, PETRI_PLACES=80, PETRI_TRANSITIONS=98} [2024-06-28 03:14:04,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-28 03:14:04,748 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 98 transitions, 910 flow [2024-06-28 03:14:04,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:04,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:04,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:04,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:14:04,748 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:04,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:04,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1594980100, now seen corresponding path program 1 times [2024-06-28 03:14:04,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:04,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081191662] [2024-06-28 03:14:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:04,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:05,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:05,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081191662] [2024-06-28 03:14:05,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081191662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:05,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:05,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:05,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936889048] [2024-06-28 03:14:05,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:05,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:05,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:05,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:05,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:05,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 98 transitions, 910 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:05,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:05,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:05,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:06,202 INFO L124 PetriNetUnfolderBase]: 1610/2509 cut-off events. [2024-06-28 03:14:06,202 INFO L125 PetriNetUnfolderBase]: For 18046/18048 co-relation queries the response was YES. [2024-06-28 03:14:06,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11163 conditions, 2509 events. 1610/2509 cut-off events. For 18046/18048 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12329 event pairs, 517 based on Foata normal form. 4/2496 useless extension candidates. Maximal degree in co-relation 11129. Up to 2349 conditions per place. [2024-06-28 03:14:06,215 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 13 changer transitions 0/121 dead transitions. [2024-06-28 03:14:06,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1226 flow [2024-06-28 03:14:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 03:14:06,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:14:06,216 INFO L175 Difference]: Start difference. First operand has 80 places, 98 transitions, 910 flow. Second operand 7 states and 123 transitions. [2024-06-28 03:14:06,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1226 flow [2024-06-28 03:14:06,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 1083 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:06,237 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 826 flow [2024-06-28 03:14:06,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=826, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-28 03:14:06,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-28 03:14:06,238 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 826 flow [2024-06-28 03:14:06,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:06,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:06,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:06,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:14:06,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:06,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:06,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1914180474, now seen corresponding path program 1 times [2024-06-28 03:14:06,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:06,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240181729] [2024-06-28 03:14:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:06,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:06,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:06,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240181729] [2024-06-28 03:14:06,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240181729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:06,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:06,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:06,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396792852] [2024-06-28 03:14:06,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:06,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:06,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:06,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:06,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:06,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 826 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:06,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:06,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:06,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:07,219 INFO L124 PetriNetUnfolderBase]: 1607/2525 cut-off events. [2024-06-28 03:14:07,219 INFO L125 PetriNetUnfolderBase]: For 18676/18678 co-relation queries the response was YES. [2024-06-28 03:14:07,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11118 conditions, 2525 events. 1607/2525 cut-off events. For 18676/18678 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12589 event pairs, 564 based on Foata normal form. 1/2525 useless extension candidates. Maximal degree in co-relation 11083. Up to 2387 conditions per place. [2024-06-28 03:14:07,238 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 98 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-06-28 03:14:07,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 111 transitions, 1084 flow [2024-06-28 03:14:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:14:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:14:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-28 03:14:07,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-28 03:14:07,241 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 826 flow. Second operand 5 states and 86 transitions. [2024-06-28 03:14:07,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 111 transitions, 1084 flow [2024-06-28 03:14:07,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 1043 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:07,264 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 835 flow [2024-06-28 03:14:07,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=835, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2024-06-28 03:14:07,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-28 03:14:07,266 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 835 flow [2024-06-28 03:14:07,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:07,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:07,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:07,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:14:07,266 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:07,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -18746278, now seen corresponding path program 1 times [2024-06-28 03:14:07,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:07,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113701770] [2024-06-28 03:14:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:07,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:07,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:07,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113701770] [2024-06-28 03:14:07,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113701770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:07,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:07,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:07,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85875044] [2024-06-28 03:14:07,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:07,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:07,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:07,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:07,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:07,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 835 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:07,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:07,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:07,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:08,413 INFO L124 PetriNetUnfolderBase]: 1910/2902 cut-off events. [2024-06-28 03:14:08,414 INFO L125 PetriNetUnfolderBase]: For 26325/26327 co-relation queries the response was YES. [2024-06-28 03:14:08,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13481 conditions, 2902 events. 1910/2902 cut-off events. For 26325/26327 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 14221 event pairs, 562 based on Foata normal form. 8/2908 useless extension candidates. Maximal degree in co-relation 13445. Up to 2361 conditions per place. [2024-06-28 03:14:08,426 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 77 selfloop transitions, 65 changer transitions 0/146 dead transitions. [2024-06-28 03:14:08,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 146 transitions, 1463 flow [2024-06-28 03:14:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:14:08,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 03:14:08,428 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 835 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:14:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 146 transitions, 1463 flow [2024-06-28 03:14:08,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 146 transitions, 1435 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:08,446 INFO L231 Difference]: Finished difference. Result has 85 places, 115 transitions, 1102 flow [2024-06-28 03:14:08,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1102, PETRI_PLACES=85, PETRI_TRANSITIONS=115} [2024-06-28 03:14:08,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-28 03:14:08,447 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 115 transitions, 1102 flow [2024-06-28 03:14:08,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:08,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:08,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:08,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:14:08,447 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:08,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:08,448 INFO L85 PathProgramCache]: Analyzing trace with hash -18751858, now seen corresponding path program 2 times [2024-06-28 03:14:08,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:08,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378269691] [2024-06-28 03:14:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:08,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:08,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:08,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378269691] [2024-06-28 03:14:08,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378269691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:08,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:08,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789347111] [2024-06-28 03:14:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:08,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:09,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:09,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 115 transitions, 1102 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:09,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:09,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:09,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:09,594 INFO L124 PetriNetUnfolderBase]: 1890/2882 cut-off events. [2024-06-28 03:14:09,594 INFO L125 PetriNetUnfolderBase]: For 29849/29855 co-relation queries the response was YES. [2024-06-28 03:14:09,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13886 conditions, 2882 events. 1890/2882 cut-off events. For 29849/29855 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14155 event pairs, 572 based on Foata normal form. 14/2894 useless extension candidates. Maximal degree in co-relation 13849. Up to 2345 conditions per place. [2024-06-28 03:14:09,609 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 74 selfloop transitions, 69 changer transitions 0/147 dead transitions. [2024-06-28 03:14:09,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 147 transitions, 1542 flow [2024-06-28 03:14:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:09,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 03:14:09,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-28 03:14:09,613 INFO L175 Difference]: Start difference. First operand has 85 places, 115 transitions, 1102 flow. Second operand 7 states and 135 transitions. [2024-06-28 03:14:09,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 147 transitions, 1542 flow [2024-06-28 03:14:09,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 1422 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:09,644 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 1131 flow [2024-06-28 03:14:09,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-28 03:14:09,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-28 03:14:09,644 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 1131 flow [2024-06-28 03:14:09,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:09,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:09,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:09,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:14:09,645 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:09,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:09,645 INFO L85 PathProgramCache]: Analyzing trace with hash -516640596, now seen corresponding path program 3 times [2024-06-28 03:14:09,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:09,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828796620] [2024-06-28 03:14:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:09,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:10,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:10,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828796620] [2024-06-28 03:14:10,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828796620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:10,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:10,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:10,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940134757] [2024-06-28 03:14:10,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:10,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:10,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:10,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:10,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:10,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 1131 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:10,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:10,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:10,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:10,733 INFO L124 PetriNetUnfolderBase]: 1874/2852 cut-off events. [2024-06-28 03:14:10,734 INFO L125 PetriNetUnfolderBase]: For 32663/32671 co-relation queries the response was YES. [2024-06-28 03:14:10,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13913 conditions, 2852 events. 1874/2852 cut-off events. For 32663/32671 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13927 event pairs, 576 based on Foata normal form. 9/2859 useless extension candidates. Maximal degree in co-relation 13875. Up to 2332 conditions per place. [2024-06-28 03:14:10,749 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 72 selfloop transitions, 62 changer transitions 0/138 dead transitions. [2024-06-28 03:14:10,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 1473 flow [2024-06-28 03:14:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 03:14:10,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-28 03:14:10,765 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 1131 flow. Second operand 7 states and 124 transitions. [2024-06-28 03:14:10,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 1473 flow [2024-06-28 03:14:10,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1240 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:14:10,798 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 1033 flow [2024-06-28 03:14:10,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1033, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-28 03:14:10,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-28 03:14:10,799 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 1033 flow [2024-06-28 03:14:10,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:10,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:10,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:10,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:14:10,800 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)] === [2024-06-28 03:14:10,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash -789945992, now seen corresponding path program 1 times [2024-06-28 03:14:10,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:10,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31151769] [2024-06-28 03:14:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:10,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:11,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:11,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31151769] [2024-06-28 03:14:11,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31151769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:11,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:11,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:11,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621103316] [2024-06-28 03:14:11,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:11,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:11,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:11,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:11,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 1033 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:11,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:11,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:11,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:11,985 INFO L124 PetriNetUnfolderBase]: 1664/2625 cut-off events. [2024-06-28 03:14:11,985 INFO L125 PetriNetUnfolderBase]: For 28691/28693 co-relation queries the response was YES. [2024-06-28 03:14:11,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12620 conditions, 2625 events. 1664/2625 cut-off events. For 28691/28693 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13188 event pairs, 581 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 12582. Up to 2468 conditions per place. [2024-06-28 03:14:11,998 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 11 changer transitions 0/127 dead transitions. [2024-06-28 03:14:11,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 127 transitions, 1329 flow [2024-06-28 03:14:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-28 03:14:12,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 03:14:12,001 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 1033 flow. Second operand 6 states and 99 transitions. [2024-06-28 03:14:12,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 127 transitions, 1329 flow [2024-06-28 03:14:12,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1146 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 03:14:12,032 INFO L231 Difference]: Finished difference. Result has 88 places, 118 transitions, 910 flow [2024-06-28 03:14:12,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=910, PETRI_PLACES=88, PETRI_TRANSITIONS=118} [2024-06-28 03:14:12,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-28 03:14:12,033 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 118 transitions, 910 flow [2024-06-28 03:14:12,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:12,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:12,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:12,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:14:12,033 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:12,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash -699459325, now seen corresponding path program 1 times [2024-06-28 03:14:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:12,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668767044] [2024-06-28 03:14:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:12,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:12,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668767044] [2024-06-28 03:14:12,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668767044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:12,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:12,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:12,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001548937] [2024-06-28 03:14:12,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:12,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:12,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:12,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:12,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:12,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:12,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 118 transitions, 910 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:12,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:12,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:12,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:13,085 INFO L124 PetriNetUnfolderBase]: 1885/2866 cut-off events. [2024-06-28 03:14:13,085 INFO L125 PetriNetUnfolderBase]: For 35380/35384 co-relation queries the response was YES. [2024-06-28 03:14:13,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14011 conditions, 2866 events. 1885/2866 cut-off events. For 35380/35384 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13963 event pairs, 445 based on Foata normal form. 6/2871 useless extension candidates. Maximal degree in co-relation 13972. Up to 2545 conditions per place. [2024-06-28 03:14:13,101 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 32 changer transitions 0/148 dead transitions. [2024-06-28 03:14:13,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 148 transitions, 1384 flow [2024-06-28 03:14:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:13,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:14:13,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-28 03:14:13,103 INFO L175 Difference]: Start difference. First operand has 88 places, 118 transitions, 910 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:14:13,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 148 transitions, 1384 flow [2024-06-28 03:14:13,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 148 transitions, 1346 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:13,149 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 991 flow [2024-06-28 03:14:13,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=991, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-28 03:14:13,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-28 03:14:13,150 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 991 flow [2024-06-28 03:14:13,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:13,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:13,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:13,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:14:13,150 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:13,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash -585779845, now seen corresponding path program 2 times [2024-06-28 03:14:13,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:13,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634213276] [2024-06-28 03:14:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:13,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:13,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:13,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634213276] [2024-06-28 03:14:13,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634213276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:13,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:13,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:13,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385450902] [2024-06-28 03:14:13,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:13,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:13,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:13,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:13,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:13,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:13,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 991 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:13,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:13,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:13,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:14,230 INFO L124 PetriNetUnfolderBase]: 1877/2853 cut-off events. [2024-06-28 03:14:14,231 INFO L125 PetriNetUnfolderBase]: For 38932/38936 co-relation queries the response was YES. [2024-06-28 03:14:14,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14360 conditions, 2853 events. 1877/2853 cut-off events. For 38932/38936 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13890 event pairs, 583 based on Foata normal form. 6/2858 useless extension candidates. Maximal degree in co-relation 14320. Up to 2621 conditions per place. [2024-06-28 03:14:14,247 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 33 changer transitions 0/146 dead transitions. [2024-06-28 03:14:14,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 146 transitions, 1353 flow [2024-06-28 03:14:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 03:14:14,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:14:14,248 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 991 flow. Second operand 7 states and 123 transitions. [2024-06-28 03:14:14,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 146 transitions, 1353 flow [2024-06-28 03:14:14,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 146 transitions, 1293 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:14,282 INFO L231 Difference]: Finished difference. Result has 95 places, 122 transitions, 1006 flow [2024-06-28 03:14:14,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1006, PETRI_PLACES=95, PETRI_TRANSITIONS=122} [2024-06-28 03:14:14,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-28 03:14:14,283 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 122 transitions, 1006 flow [2024-06-28 03:14:14,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:14,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:14,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:14,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:14:14,283 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)] === [2024-06-28 03:14:14,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash -581126497, now seen corresponding path program 1 times [2024-06-28 03:14:14,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:14,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322514529] [2024-06-28 03:14:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:14,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:15,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:15,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322514529] [2024-06-28 03:14:15,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322514529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:15,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:15,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:15,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446449242] [2024-06-28 03:14:15,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:15,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:15,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:15,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:15,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:15,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:15,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 122 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:15,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:15,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:15,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:15,713 INFO L124 PetriNetUnfolderBase]: 1969/3002 cut-off events. [2024-06-28 03:14:15,713 INFO L125 PetriNetUnfolderBase]: For 47006/47008 co-relation queries the response was YES. [2024-06-28 03:14:15,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15259 conditions, 3002 events. 1969/3002 cut-off events. For 47006/47008 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14863 event pairs, 521 based on Foata normal form. 24/3024 useless extension candidates. Maximal degree in co-relation 15217. Up to 2321 conditions per place. [2024-06-28 03:14:15,729 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 85 selfloop transitions, 70 changer transitions 0/159 dead transitions. [2024-06-28 03:14:15,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 1454 flow [2024-06-28 03:14:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:14:15,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-28 03:14:15,731 INFO L175 Difference]: Start difference. First operand has 95 places, 122 transitions, 1006 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:14:15,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 1454 flow [2024-06-28 03:14:15,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 159 transitions, 1379 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:15,768 INFO L231 Difference]: Finished difference. Result has 97 places, 124 transitions, 1113 flow [2024-06-28 03:14:15,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1113, PETRI_PLACES=97, PETRI_TRANSITIONS=124} [2024-06-28 03:14:15,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-28 03:14:15,769 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 124 transitions, 1113 flow [2024-06-28 03:14:15,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:15,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:15,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:15,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:14:15,770 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:15,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash 909864595, now seen corresponding path program 1 times [2024-06-28 03:14:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:15,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633806527] [2024-06-28 03:14:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:15,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:16,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:16,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633806527] [2024-06-28 03:14:16,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633806527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:16,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:16,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:16,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566028583] [2024-06-28 03:14:16,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:16,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:16,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:16,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:16,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:16,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:16,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 124 transitions, 1113 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:16,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:16,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:16,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:16,765 INFO L124 PetriNetUnfolderBase]: 1974/3021 cut-off events. [2024-06-28 03:14:16,766 INFO L125 PetriNetUnfolderBase]: For 48189/48195 co-relation queries the response was YES. [2024-06-28 03:14:16,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15921 conditions, 3021 events. 1974/3021 cut-off events. For 48189/48195 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14998 event pairs, 612 based on Foata normal form. 7/3027 useless extension candidates. Maximal degree in co-relation 15878. Up to 2916 conditions per place. [2024-06-28 03:14:16,822 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 126 selfloop transitions, 13 changer transitions 0/143 dead transitions. [2024-06-28 03:14:16,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 143 transitions, 1473 flow [2024-06-28 03:14:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-28 03:14:16,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-28 03:14:16,824 INFO L175 Difference]: Start difference. First operand has 97 places, 124 transitions, 1113 flow. Second operand 6 states and 100 transitions. [2024-06-28 03:14:16,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 143 transitions, 1473 flow [2024-06-28 03:14:16,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 143 transitions, 1325 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:16,869 INFO L231 Difference]: Finished difference. Result has 97 places, 127 transitions, 1032 flow [2024-06-28 03:14:16,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1032, PETRI_PLACES=97, PETRI_TRANSITIONS=127} [2024-06-28 03:14:16,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-28 03:14:16,869 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 127 transitions, 1032 flow [2024-06-28 03:14:16,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:16,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:16,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:16,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:14:16,870 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:16,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash 527186621, now seen corresponding path program 2 times [2024-06-28 03:14:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:16,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138522457] [2024-06-28 03:14:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:16,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:17,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:17,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138522457] [2024-06-28 03:14:17,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138522457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:17,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:17,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:17,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642073453] [2024-06-28 03:14:17,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:17,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:17,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:17,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 127 transitions, 1032 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:17,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:17,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:17,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:18,222 INFO L124 PetriNetUnfolderBase]: 1991/3020 cut-off events. [2024-06-28 03:14:18,223 INFO L125 PetriNetUnfolderBase]: For 51896/51902 co-relation queries the response was YES. [2024-06-28 03:14:18,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16040 conditions, 3020 events. 1991/3020 cut-off events. For 51896/51902 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14824 event pairs, 536 based on Foata normal form. 5/3015 useless extension candidates. Maximal degree in co-relation 15996. Up to 2504 conditions per place. [2024-06-28 03:14:18,239 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 80 selfloop transitions, 74 changer transitions 0/158 dead transitions. [2024-06-28 03:14:18,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 1464 flow [2024-06-28 03:14:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:14:18,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 03:14:18,240 INFO L175 Difference]: Start difference. First operand has 97 places, 127 transitions, 1032 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:14:18,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 1464 flow [2024-06-28 03:14:18,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 158 transitions, 1421 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:18,282 INFO L231 Difference]: Finished difference. Result has 101 places, 129 transitions, 1181 flow [2024-06-28 03:14:18,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1181, PETRI_PLACES=101, PETRI_TRANSITIONS=129} [2024-06-28 03:14:18,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-28 03:14:18,283 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 129 transitions, 1181 flow [2024-06-28 03:14:18,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:18,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:18,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:18,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:14:18,283 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:18,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash 527483291, now seen corresponding path program 3 times [2024-06-28 03:14:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:18,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093610638] [2024-06-28 03:14:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:18,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:19,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:19,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093610638] [2024-06-28 03:14:19,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093610638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:19,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:19,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:19,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195162562] [2024-06-28 03:14:19,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:19,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:19,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:19,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:19,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:19,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 129 transitions, 1181 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:19,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:19,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:19,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:19,780 INFO L124 PetriNetUnfolderBase]: 2008/3047 cut-off events. [2024-06-28 03:14:19,780 INFO L125 PetriNetUnfolderBase]: For 58214/58220 co-relation queries the response was YES. [2024-06-28 03:14:19,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16968 conditions, 3047 events. 2008/3047 cut-off events. For 58214/58220 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15023 event pairs, 485 based on Foata normal form. 5/3042 useless extension candidates. Maximal degree in co-relation 16923. Up to 2293 conditions per place. [2024-06-28 03:14:19,797 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 83 selfloop transitions, 81 changer transitions 0/168 dead transitions. [2024-06-28 03:14:19,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 168 transitions, 1773 flow [2024-06-28 03:14:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:14:19,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-28 03:14:19,798 INFO L175 Difference]: Start difference. First operand has 101 places, 129 transitions, 1181 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:14:19,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 168 transitions, 1773 flow [2024-06-28 03:14:19,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 168 transitions, 1601 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:19,856 INFO L231 Difference]: Finished difference. Result has 103 places, 133 transitions, 1254 flow [2024-06-28 03:14:19,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1254, PETRI_PLACES=103, PETRI_TRANSITIONS=133} [2024-06-28 03:14:19,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-28 03:14:19,856 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 133 transitions, 1254 flow [2024-06-28 03:14:19,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:19,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:19,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:19,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:14:19,857 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:19,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1475064887, now seen corresponding path program 4 times [2024-06-28 03:14:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:19,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80625347] [2024-06-28 03:14:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:20,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:20,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80625347] [2024-06-28 03:14:20,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80625347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:20,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:20,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:14:20,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815145051] [2024-06-28 03:14:20,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:20,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:14:20,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:20,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:14:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:14:20,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:20,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 133 transitions, 1254 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:20,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:20,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:20,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:21,505 INFO L124 PetriNetUnfolderBase]: 2000/3039 cut-off events. [2024-06-28 03:14:21,505 INFO L125 PetriNetUnfolderBase]: For 62490/62496 co-relation queries the response was YES. [2024-06-28 03:14:21,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17160 conditions, 3039 events. 2000/3039 cut-off events. For 62490/62496 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14952 event pairs, 546 based on Foata normal form. 5/3034 useless extension candidates. Maximal degree in co-relation 17114. Up to 2519 conditions per place. [2024-06-28 03:14:21,522 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 72 changer transitions 0/162 dead transitions. [2024-06-28 03:14:21,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 162 transitions, 1660 flow [2024-06-28 03:14:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:14:21,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-28 03:14:21,525 INFO L175 Difference]: Start difference. First operand has 103 places, 133 transitions, 1254 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:14:21,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 162 transitions, 1660 flow [2024-06-28 03:14:21,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 162 transitions, 1468 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:21,596 INFO L231 Difference]: Finished difference. Result has 106 places, 133 transitions, 1214 flow [2024-06-28 03:14:21,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1214, PETRI_PLACES=106, PETRI_TRANSITIONS=133} [2024-06-28 03:14:21,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-28 03:14:21,596 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 133 transitions, 1214 flow [2024-06-28 03:14:21,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:21,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:21,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:21,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:14:21,597 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:21,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash 921292435, now seen corresponding path program 2 times [2024-06-28 03:14:21,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:21,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876475480] [2024-06-28 03:14:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:21,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:22,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:22,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876475480] [2024-06-28 03:14:22,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876475480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:22,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:22,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:22,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047001900] [2024-06-28 03:14:22,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:22,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:22,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:22,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:22,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:22,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 133 transitions, 1214 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:22,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:22,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:22,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:22,661 INFO L124 PetriNetUnfolderBase]: 1997/3064 cut-off events. [2024-06-28 03:14:22,662 INFO L125 PetriNetUnfolderBase]: For 64834/64846 co-relation queries the response was YES. [2024-06-28 03:14:22,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17088 conditions, 3064 events. 1997/3064 cut-off events. For 64834/64846 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15268 event pairs, 610 based on Foata normal form. 13/3076 useless extension candidates. Maximal degree in co-relation 17041. Up to 2948 conditions per place. [2024-06-28 03:14:22,679 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 125 selfloop transitions, 18 changer transitions 0/147 dead transitions. [2024-06-28 03:14:22,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 147 transitions, 1574 flow [2024-06-28 03:14:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:14:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:14:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-28 03:14:22,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:14:22,680 INFO L175 Difference]: Start difference. First operand has 106 places, 133 transitions, 1214 flow. Second operand 6 states and 96 transitions. [2024-06-28 03:14:22,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 147 transitions, 1574 flow [2024-06-28 03:14:22,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 147 transitions, 1399 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:14:22,735 INFO L231 Difference]: Finished difference. Result has 105 places, 136 transitions, 1123 flow [2024-06-28 03:14:22,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1123, PETRI_PLACES=105, PETRI_TRANSITIONS=136} [2024-06-28 03:14:22,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-28 03:14:22,736 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 136 transitions, 1123 flow [2024-06-28 03:14:22,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:22,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:22,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:22,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:14:22,737 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:22,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:22,737 INFO L85 PathProgramCache]: Analyzing trace with hash 915584467, now seen corresponding path program 1 times [2024-06-28 03:14:22,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:22,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410261542] [2024-06-28 03:14:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:22,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:23,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:23,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410261542] [2024-06-28 03:14:23,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410261542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:23,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:23,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:23,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992989186] [2024-06-28 03:14:23,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:23,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:23,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:23,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:23,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:23,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:23,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 136 transitions, 1123 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:23,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:23,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:23,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:23,743 INFO L124 PetriNetUnfolderBase]: 1798/2838 cut-off events. [2024-06-28 03:14:23,744 INFO L125 PetriNetUnfolderBase]: For 58016/58018 co-relation queries the response was YES. [2024-06-28 03:14:23,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15417 conditions, 2838 events. 1798/2838 cut-off events. For 58016/58018 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14580 event pairs, 560 based on Foata normal form. 1/2838 useless extension candidates. Maximal degree in co-relation 15369. Up to 2681 conditions per place. [2024-06-28 03:14:23,758 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 134 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2024-06-28 03:14:23,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 152 transitions, 1492 flow [2024-06-28 03:14:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 03:14:23,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:14:23,759 INFO L175 Difference]: Start difference. First operand has 105 places, 136 transitions, 1123 flow. Second operand 7 states and 112 transitions. [2024-06-28 03:14:23,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 152 transitions, 1492 flow [2024-06-28 03:14:23,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 1430 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:23,814 INFO L231 Difference]: Finished difference. Result has 109 places, 141 transitions, 1147 flow [2024-06-28 03:14:23,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1147, PETRI_PLACES=109, PETRI_TRANSITIONS=141} [2024-06-28 03:14:23,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-28 03:14:23,815 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 141 transitions, 1147 flow [2024-06-28 03:14:23,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:23,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:23,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:23,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:14:23,816 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:23,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash 921298387, now seen corresponding path program 2 times [2024-06-28 03:14:23,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:23,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975726401] [2024-06-28 03:14:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:23,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:24,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:24,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975726401] [2024-06-28 03:14:24,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975726401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:24,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:24,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:14:24,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970052119] [2024-06-28 03:14:24,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:24,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:14:24,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:14:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:14:24,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:24,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 141 transitions, 1147 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:24,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:24,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:24,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:24,808 INFO L124 PetriNetUnfolderBase]: 1795/2835 cut-off events. [2024-06-28 03:14:24,809 INFO L125 PetriNetUnfolderBase]: For 60925/60929 co-relation queries the response was YES. [2024-06-28 03:14:24,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15735 conditions, 2835 events. 1795/2835 cut-off events. For 60925/60929 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14542 event pairs, 564 based on Foata normal form. 3/2837 useless extension candidates. Maximal degree in co-relation 15685. Up to 2671 conditions per place. [2024-06-28 03:14:24,826 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 129 selfloop transitions, 18 changer transitions 0/152 dead transitions. [2024-06-28 03:14:24,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 152 transitions, 1499 flow [2024-06-28 03:14:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 03:14:24,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-28 03:14:24,834 INFO L175 Difference]: Start difference. First operand has 109 places, 141 transitions, 1147 flow. Second operand 7 states and 111 transitions. [2024-06-28 03:14:24,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 152 transitions, 1499 flow [2024-06-28 03:14:24,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 152 transitions, 1453 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:24,900 INFO L231 Difference]: Finished difference. Result has 112 places, 144 transitions, 1185 flow [2024-06-28 03:14:24,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1185, PETRI_PLACES=112, PETRI_TRANSITIONS=144} [2024-06-28 03:14:24,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-28 03:14:24,905 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 144 transitions, 1185 flow [2024-06-28 03:14:24,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:24,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:24,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:24,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:14:24,906 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)] === [2024-06-28 03:14:24,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1174899183, now seen corresponding path program 1 times [2024-06-28 03:14:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:24,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431356932] [2024-06-28 03:14:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:25,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:25,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431356932] [2024-06-28 03:14:25,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431356932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:25,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:25,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:25,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997417297] [2024-06-28 03:14:25,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:25,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:25,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:25,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:25,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:25,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 144 transitions, 1185 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:25,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:25,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:25,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:26,164 INFO L124 PetriNetUnfolderBase]: 2118/3263 cut-off events. [2024-06-28 03:14:26,164 INFO L125 PetriNetUnfolderBase]: For 88535/88537 co-relation queries the response was YES. [2024-06-28 03:14:26,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19061 conditions, 3263 events. 2118/3263 cut-off events. For 88535/88537 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16600 event pairs, 403 based on Foata normal form. 16/3277 useless extension candidates. Maximal degree in co-relation 19010. Up to 2043 conditions per place. [2024-06-28 03:14:26,184 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 111 selfloop transitions, 69 changer transitions 0/184 dead transitions. [2024-06-28 03:14:26,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 184 transitions, 1801 flow [2024-06-28 03:14:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:14:26,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-28 03:14:26,185 INFO L175 Difference]: Start difference. First operand has 112 places, 144 transitions, 1185 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:14:26,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 184 transitions, 1801 flow [2024-06-28 03:14:26,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 184 transitions, 1739 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:26,261 INFO L231 Difference]: Finished difference. Result has 115 places, 146 transitions, 1317 flow [2024-06-28 03:14:26,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=115, PETRI_TRANSITIONS=146} [2024-06-28 03:14:26,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-28 03:14:26,262 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 146 transitions, 1317 flow [2024-06-28 03:14:26,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:26,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:26,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:26,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:14:26,263 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)] === [2024-06-28 03:14:26,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:26,263 INFO L85 PathProgramCache]: Analyzing trace with hash -206527313, now seen corresponding path program 2 times [2024-06-28 03:14:26,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:26,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334700976] [2024-06-28 03:14:26,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:26,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:26,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:26,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334700976] [2024-06-28 03:14:26,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334700976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:26,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:26,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:26,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353088646] [2024-06-28 03:14:26,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:26,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:26,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:26,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:26,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 146 transitions, 1317 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:26,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:26,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:26,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:27,561 INFO L124 PetriNetUnfolderBase]: 2176/3363 cut-off events. [2024-06-28 03:14:27,562 INFO L125 PetriNetUnfolderBase]: For 96104/96106 co-relation queries the response was YES. [2024-06-28 03:14:27,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20099 conditions, 3363 events. 2176/3363 cut-off events. For 96104/96106 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17318 event pairs, 575 based on Foata normal form. 16/3377 useless extension candidates. Maximal degree in co-relation 20047. Up to 2550 conditions per place. [2024-06-28 03:14:27,584 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 108 selfloop transitions, 72 changer transitions 0/184 dead transitions. [2024-06-28 03:14:27,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 184 transitions, 1817 flow [2024-06-28 03:14:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:14:27,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-28 03:14:27,586 INFO L175 Difference]: Start difference. First operand has 115 places, 146 transitions, 1317 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:14:27,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 184 transitions, 1817 flow [2024-06-28 03:14:27,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 184 transitions, 1732 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:27,669 INFO L231 Difference]: Finished difference. Result has 119 places, 147 transitions, 1410 flow [2024-06-28 03:14:27,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1410, PETRI_PLACES=119, PETRI_TRANSITIONS=147} [2024-06-28 03:14:27,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-28 03:14:27,670 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 147 transitions, 1410 flow [2024-06-28 03:14:27,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:27,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:27,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:27,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:14:27,671 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:27,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:27,671 INFO L85 PathProgramCache]: Analyzing trace with hash 589477125, now seen corresponding path program 1 times [2024-06-28 03:14:27,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:27,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540678343] [2024-06-28 03:14:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:28,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:28,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540678343] [2024-06-28 03:14:28,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540678343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:28,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:28,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:28,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069365813] [2024-06-28 03:14:28,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:28,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:28,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:28,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:28,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:28,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:28,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 147 transitions, 1410 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:28,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:28,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:28,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:28,722 INFO L124 PetriNetUnfolderBase]: 2186/3385 cut-off events. [2024-06-28 03:14:28,723 INFO L125 PetriNetUnfolderBase]: For 98290/98298 co-relation queries the response was YES. [2024-06-28 03:14:28,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20707 conditions, 3385 events. 2186/3385 cut-off events. For 98290/98298 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 17539 event pairs, 651 based on Foata normal form. 10/3394 useless extension candidates. Maximal degree in co-relation 20653. Up to 3150 conditions per place. [2024-06-28 03:14:28,807 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-28 03:14:28,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 173 transitions, 1870 flow [2024-06-28 03:14:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 03:14:28,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:14:28,808 INFO L175 Difference]: Start difference. First operand has 119 places, 147 transitions, 1410 flow. Second operand 7 states and 123 transitions. [2024-06-28 03:14:28,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 173 transitions, 1870 flow [2024-06-28 03:14:28,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1710 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:28,895 INFO L231 Difference]: Finished difference. Result has 120 places, 151 transitions, 1386 flow [2024-06-28 03:14:28,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1386, PETRI_PLACES=120, PETRI_TRANSITIONS=151} [2024-06-28 03:14:28,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-28 03:14:28,895 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 151 transitions, 1386 flow [2024-06-28 03:14:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:28,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:28,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:28,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:14:28,896 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:28,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash -840776529, now seen corresponding path program 3 times [2024-06-28 03:14:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:28,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139852441] [2024-06-28 03:14:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:29,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:29,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139852441] [2024-06-28 03:14:29,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139852441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:29,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:29,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:29,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105847148] [2024-06-28 03:14:29,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:29,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:29,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:29,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:29,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:29,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 151 transitions, 1386 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:29,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:29,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:29,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:30,251 INFO L124 PetriNetUnfolderBase]: 2305/3603 cut-off events. [2024-06-28 03:14:30,251 INFO L125 PetriNetUnfolderBase]: For 114258/114264 co-relation queries the response was YES. [2024-06-28 03:14:30,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22200 conditions, 3603 events. 2305/3603 cut-off events. For 114258/114264 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19157 event pairs, 475 based on Foata normal form. 22/3623 useless extension candidates. Maximal degree in co-relation 22145. Up to 2667 conditions per place. [2024-06-28 03:14:30,274 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 117 selfloop transitions, 74 changer transitions 0/195 dead transitions. [2024-06-28 03:14:30,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 195 transitions, 2062 flow [2024-06-28 03:14:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:14:30,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-28 03:14:30,275 INFO L175 Difference]: Start difference. First operand has 120 places, 151 transitions, 1386 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:14:30,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 195 transitions, 2062 flow [2024-06-28 03:14:30,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 195 transitions, 1956 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:30,366 INFO L231 Difference]: Finished difference. Result has 123 places, 153 transitions, 1492 flow [2024-06-28 03:14:30,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1492, PETRI_PLACES=123, PETRI_TRANSITIONS=153} [2024-06-28 03:14:30,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-28 03:14:30,367 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 153 transitions, 1492 flow [2024-06-28 03:14:30,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:30,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:30,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:30,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:14:30,368 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:30,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2020894907, now seen corresponding path program 4 times [2024-06-28 03:14:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:30,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124361812] [2024-06-28 03:14:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:30,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:30,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:30,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124361812] [2024-06-28 03:14:30,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124361812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:30,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:30,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:30,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835384578] [2024-06-28 03:14:30,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:30,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:30,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:30,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:30,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:30,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 153 transitions, 1492 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:30,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:30,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:30,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:31,760 INFO L124 PetriNetUnfolderBase]: 2380/3720 cut-off events. [2024-06-28 03:14:31,761 INFO L125 PetriNetUnfolderBase]: For 125658/125660 co-relation queries the response was YES. [2024-06-28 03:14:31,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23316 conditions, 3720 events. 2380/3720 cut-off events. For 125658/125660 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 20018 event pairs, 624 based on Foata normal form. 20/3738 useless extension candidates. Maximal degree in co-relation 23260. Up to 3043 conditions per place. [2024-06-28 03:14:31,785 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 67 changer transitions 0/189 dead transitions. [2024-06-28 03:14:31,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 189 transitions, 2004 flow [2024-06-28 03:14:31,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:14:31,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-28 03:14:31,786 INFO L175 Difference]: Start difference. First operand has 123 places, 153 transitions, 1492 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:14:31,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 189 transitions, 2004 flow [2024-06-28 03:14:31,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 189 transitions, 1896 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:31,895 INFO L231 Difference]: Finished difference. Result has 127 places, 154 transitions, 1559 flow [2024-06-28 03:14:31,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1559, PETRI_PLACES=127, PETRI_TRANSITIONS=154} [2024-06-28 03:14:31,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-28 03:14:31,896 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 154 transitions, 1559 flow [2024-06-28 03:14:31,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:31,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:31,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:31,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:14:31,897 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:31,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1038550993, now seen corresponding path program 5 times [2024-06-28 03:14:31,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353610329] [2024-06-28 03:14:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:32,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:32,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353610329] [2024-06-28 03:14:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353610329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:32,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:32,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474139570] [2024-06-28 03:14:32,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:32,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:32,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:32,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:32,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 154 transitions, 1559 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:32,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:32,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:32,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:33,236 INFO L124 PetriNetUnfolderBase]: 2455/3853 cut-off events. [2024-06-28 03:14:33,237 INFO L125 PetriNetUnfolderBase]: For 133506/133512 co-relation queries the response was YES. [2024-06-28 03:14:33,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24292 conditions, 3853 events. 2455/3853 cut-off events. For 133506/133512 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21035 event pairs, 648 based on Foata normal form. 26/3877 useless extension candidates. Maximal degree in co-relation 24234. Up to 3168 conditions per place. [2024-06-28 03:14:33,263 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 118 selfloop transitions, 71 changer transitions 0/193 dead transitions. [2024-06-28 03:14:33,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 193 transitions, 2091 flow [2024-06-28 03:14:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:14:33,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-28 03:14:33,264 INFO L175 Difference]: Start difference. First operand has 127 places, 154 transitions, 1559 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:14:33,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 193 transitions, 2091 flow [2024-06-28 03:14:33,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 193 transitions, 1946 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:33,450 INFO L231 Difference]: Finished difference. Result has 129 places, 155 transitions, 1597 flow [2024-06-28 03:14:33,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1597, PETRI_PLACES=129, PETRI_TRANSITIONS=155} [2024-06-28 03:14:33,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-28 03:14:33,450 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 155 transitions, 1597 flow [2024-06-28 03:14:33,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:33,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:33,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:33,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:14:33,451 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:33,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2021110109, now seen corresponding path program 1 times [2024-06-28 03:14:33,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:33,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670313742] [2024-06-28 03:14:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:33,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:34,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:34,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670313742] [2024-06-28 03:14:34,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670313742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:34,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:34,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:34,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238951152] [2024-06-28 03:14:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:34,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:34,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:34,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:34,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 155 transitions, 1597 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:34,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:34,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:34,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:34,872 INFO L124 PetriNetUnfolderBase]: 2496/3918 cut-off events. [2024-06-28 03:14:34,872 INFO L125 PetriNetUnfolderBase]: For 137783/137785 co-relation queries the response was YES. [2024-06-28 03:14:34,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24811 conditions, 3918 events. 2496/3918 cut-off events. For 137783/137785 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21486 event pairs, 640 based on Foata normal form. 12/3928 useless extension candidates. Maximal degree in co-relation 24752. Up to 2834 conditions per place. [2024-06-28 03:14:34,897 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 70 changer transitions 0/192 dead transitions. [2024-06-28 03:14:34,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 192 transitions, 2119 flow [2024-06-28 03:14:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:14:34,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-28 03:14:34,899 INFO L175 Difference]: Start difference. First operand has 129 places, 155 transitions, 1597 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:14:34,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 192 transitions, 2119 flow [2024-06-28 03:14:35,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 1964 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:35,033 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1621 flow [2024-06-28 03:14:35,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1621, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-06-28 03:14:35,034 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-28 03:14:35,034 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1621 flow [2024-06-28 03:14:35,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:35,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:35,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:35,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:14:35,034 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:35,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash -52615855, now seen corresponding path program 1 times [2024-06-28 03:14:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:35,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816814490] [2024-06-28 03:14:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:35,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:35,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816814490] [2024-06-28 03:14:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816814490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:35,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:35,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:35,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301464081] [2024-06-28 03:14:35,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:35,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:35,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:35,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:35,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1621 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:35,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:35,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:35,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:36,388 INFO L124 PetriNetUnfolderBase]: 2501/3936 cut-off events. [2024-06-28 03:14:36,389 INFO L125 PetriNetUnfolderBase]: For 138822/138828 co-relation queries the response was YES. [2024-06-28 03:14:36,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24979 conditions, 3936 events. 2501/3936 cut-off events. For 138822/138828 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21702 event pairs, 777 based on Foata normal form. 7/3942 useless extension candidates. Maximal degree in co-relation 24919. Up to 3796 conditions per place. [2024-06-28 03:14:36,416 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 154 selfloop transitions, 17 changer transitions 0/175 dead transitions. [2024-06-28 03:14:36,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 175 transitions, 2053 flow [2024-06-28 03:14:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-28 03:14:36,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:14:36,417 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1621 flow. Second operand 7 states and 112 transitions. [2024-06-28 03:14:36,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 175 transitions, 2053 flow [2024-06-28 03:14:36,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 175 transitions, 1894 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:36,584 INFO L231 Difference]: Finished difference. Result has 132 places, 159 transitions, 1546 flow [2024-06-28 03:14:36,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1546, PETRI_PLACES=132, PETRI_TRANSITIONS=159} [2024-06-28 03:14:36,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-28 03:14:36,585 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 159 transitions, 1546 flow [2024-06-28 03:14:36,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:36,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:36,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:36,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:14:36,586 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:36,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1858967541, now seen corresponding path program 2 times [2024-06-28 03:14:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:36,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879813104] [2024-06-28 03:14:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:37,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:37,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879813104] [2024-06-28 03:14:37,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879813104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:37,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:37,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:37,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538693179] [2024-06-28 03:14:37,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:37,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:37,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:37,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:37,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 159 transitions, 1546 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:37,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:37,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:37,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:37,990 INFO L124 PetriNetUnfolderBase]: 2529/3974 cut-off events. [2024-06-28 03:14:37,991 INFO L125 PetriNetUnfolderBase]: For 143830/143834 co-relation queries the response was YES. [2024-06-28 03:14:38,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25272 conditions, 3974 events. 2529/3974 cut-off events. For 143830/143834 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 21934 event pairs, 763 based on Foata normal form. 4/3977 useless extension candidates. Maximal degree in co-relation 25211. Up to 3680 conditions per place. [2024-06-28 03:14:38,020 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 140 selfloop transitions, 39 changer transitions 0/183 dead transitions. [2024-06-28 03:14:38,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 2134 flow [2024-06-28 03:14:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:14:38,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:14:38,021 INFO L175 Difference]: Start difference. First operand has 132 places, 159 transitions, 1546 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:14:38,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 2134 flow [2024-06-28 03:14:38,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 183 transitions, 2072 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:38,204 INFO L231 Difference]: Finished difference. Result has 135 places, 167 transitions, 1711 flow [2024-06-28 03:14:38,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1711, PETRI_PLACES=135, PETRI_TRANSITIONS=167} [2024-06-28 03:14:38,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-28 03:14:38,205 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 167 transitions, 1711 flow [2024-06-28 03:14:38,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:38,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:38,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:38,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:14:38,206 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:38,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:38,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1028957889, now seen corresponding path program 6 times [2024-06-28 03:14:38,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:38,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585013667] [2024-06-28 03:14:38,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:38,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:38,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:38,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585013667] [2024-06-28 03:14:38,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585013667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:38,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:38,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:38,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230944033] [2024-06-28 03:14:38,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:38,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:38,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:38,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:38,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:38,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 167 transitions, 1711 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:38,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:38,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:38,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:39,541 INFO L124 PetriNetUnfolderBase]: 2493/3923 cut-off events. [2024-06-28 03:14:39,542 INFO L125 PetriNetUnfolderBase]: For 152622/152626 co-relation queries the response was YES. [2024-06-28 03:14:39,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25243 conditions, 3923 events. 2493/3923 cut-off events. For 152622/152626 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21550 event pairs, 649 based on Foata normal form. 22/3943 useless extension candidates. Maximal degree in co-relation 25180. Up to 3235 conditions per place. [2024-06-28 03:14:39,569 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 63 changer transitions 0/198 dead transitions. [2024-06-28 03:14:39,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 198 transitions, 2203 flow [2024-06-28 03:14:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:14:39,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 03:14:39,571 INFO L175 Difference]: Start difference. First operand has 135 places, 167 transitions, 1711 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:14:39,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 198 transitions, 2203 flow [2024-06-28 03:14:39,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 198 transitions, 2101 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:39,763 INFO L231 Difference]: Finished difference. Result has 140 places, 167 transitions, 1744 flow [2024-06-28 03:14:39,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1744, PETRI_PLACES=140, PETRI_TRANSITIONS=167} [2024-06-28 03:14:39,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-28 03:14:39,763 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 167 transitions, 1744 flow [2024-06-28 03:14:39,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:39,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:39,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:39,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:14:39,764 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:39,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1731996317, now seen corresponding path program 2 times [2024-06-28 03:14:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:39,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556429481] [2024-06-28 03:14:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:40,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:40,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556429481] [2024-06-28 03:14:40,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556429481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:40,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:40,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:40,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873755537] [2024-06-28 03:14:40,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:40,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:40,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:40,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:40,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:40,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:40,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 167 transitions, 1744 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:40,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:40,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:40,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:41,224 INFO L124 PetriNetUnfolderBase]: 2473/3887 cut-off events. [2024-06-28 03:14:41,224 INFO L125 PetriNetUnfolderBase]: For 148504/148508 co-relation queries the response was YES. [2024-06-28 03:14:41,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25054 conditions, 3887 events. 2473/3887 cut-off events. For 148504/148508 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 21277 event pairs, 626 based on Foata normal form. 14/3899 useless extension candidates. Maximal degree in co-relation 24989. Up to 3113 conditions per place. [2024-06-28 03:14:41,253 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 65 changer transitions 0/200 dead transitions. [2024-06-28 03:14:41,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 200 transitions, 2250 flow [2024-06-28 03:14:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:14:41,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:14:41,255 INFO L175 Difference]: Start difference. First operand has 140 places, 167 transitions, 1744 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:14:41,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 200 transitions, 2250 flow [2024-06-28 03:14:41,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 200 transitions, 2095 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 03:14:41,492 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1725 flow [2024-06-28 03:14:41,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1725, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-28 03:14:41,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-28 03:14:41,493 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1725 flow [2024-06-28 03:14:41,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:41,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:41,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:41,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:14:41,493 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:41,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:41,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1732255787, now seen corresponding path program 3 times [2024-06-28 03:14:41,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:41,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911008250] [2024-06-28 03:14:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:41,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:42,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:42,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911008250] [2024-06-28 03:14:42,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911008250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:42,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:42,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:42,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052449376] [2024-06-28 03:14:42,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:42,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:42,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:42,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:42,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:42,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1725 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:42,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:42,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:42,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:42,826 INFO L124 PetriNetUnfolderBase]: 2453/3855 cut-off events. [2024-06-28 03:14:42,826 INFO L125 PetriNetUnfolderBase]: For 147776/147780 co-relation queries the response was YES. [2024-06-28 03:14:42,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24512 conditions, 3855 events. 2453/3855 cut-off events. For 147776/147780 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21114 event pairs, 569 based on Foata normal form. 14/3867 useless extension candidates. Maximal degree in co-relation 24446. Up to 2431 conditions per place. [2024-06-28 03:14:42,850 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 122 selfloop transitions, 73 changer transitions 0/199 dead transitions. [2024-06-28 03:14:42,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 199 transitions, 2167 flow [2024-06-28 03:14:42,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:14:42,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 03:14:42,852 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1725 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:14:42,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 199 transitions, 2167 flow [2024-06-28 03:14:43,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 199 transitions, 1935 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 03:14:43,002 INFO L231 Difference]: Finished difference. Result has 140 places, 166 transitions, 1583 flow [2024-06-28 03:14:43,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1583, PETRI_PLACES=140, PETRI_TRANSITIONS=166} [2024-06-28 03:14:43,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-28 03:14:43,003 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 166 transitions, 1583 flow [2024-06-28 03:14:43,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:43,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:43,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:43,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:14:43,003 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:43,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1071145879, now seen corresponding path program 2 times [2024-06-28 03:14:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:43,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545629052] [2024-06-28 03:14:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:43,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:43,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:43,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545629052] [2024-06-28 03:14:43,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545629052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:43,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:43,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:43,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303350110] [2024-06-28 03:14:43,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:43,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:43,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:43,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:43,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:43,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 166 transitions, 1583 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:43,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:43,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:43,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:44,431 INFO L124 PetriNetUnfolderBase]: 2458/3870 cut-off events. [2024-06-28 03:14:44,432 INFO L125 PetriNetUnfolderBase]: For 147504/147512 co-relation queries the response was YES. [2024-06-28 03:14:44,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24298 conditions, 3870 events. 2458/3870 cut-off events. For 147504/147512 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21198 event pairs, 733 based on Foata normal form. 9/3878 useless extension candidates. Maximal degree in co-relation 24232. Up to 3706 conditions per place. [2024-06-28 03:14:44,458 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 154 selfloop transitions, 28 changer transitions 0/186 dead transitions. [2024-06-28 03:14:44,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 186 transitions, 2167 flow [2024-06-28 03:14:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 03:14:44,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-28 03:14:44,460 INFO L175 Difference]: Start difference. First operand has 140 places, 166 transitions, 1583 flow. Second operand 7 states and 109 transitions. [2024-06-28 03:14:44,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 186 transitions, 2167 flow [2024-06-28 03:14:44,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 186 transitions, 1962 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:14:44,623 INFO L231 Difference]: Finished difference. Result has 141 places, 174 transitions, 1565 flow [2024-06-28 03:14:44,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1565, PETRI_PLACES=141, PETRI_TRANSITIONS=174} [2024-06-28 03:14:44,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-28 03:14:44,624 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 174 transitions, 1565 flow [2024-06-28 03:14:44,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:44,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:44,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:44,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:14:44,624 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:44,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash 599953017, now seen corresponding path program 3 times [2024-06-28 03:14:44,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:44,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065097643] [2024-06-28 03:14:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:44,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:45,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:45,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065097643] [2024-06-28 03:14:45,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065097643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:45,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:45,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:45,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621825328] [2024-06-28 03:14:45,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:45,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:45,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:45,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:45,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:45,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:45,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 174 transitions, 1565 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:45,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:45,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:45,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:46,016 INFO L124 PetriNetUnfolderBase]: 2455/3866 cut-off events. [2024-06-28 03:14:46,017 INFO L125 PetriNetUnfolderBase]: For 152816/152824 co-relation queries the response was YES. [2024-06-28 03:14:46,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23877 conditions, 3866 events. 2455/3866 cut-off events. For 152816/152824 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21190 event pairs, 733 based on Foata normal form. 9/3874 useless extension candidates. Maximal degree in co-relation 23810. Up to 3712 conditions per place. [2024-06-28 03:14:46,045 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 161 selfloop transitions, 21 changer transitions 0/186 dead transitions. [2024-06-28 03:14:46,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 1972 flow [2024-06-28 03:14:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 03:14:46,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-28 03:14:46,046 INFO L175 Difference]: Start difference. First operand has 141 places, 174 transitions, 1565 flow. Second operand 7 states and 107 transitions. [2024-06-28 03:14:46,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 1972 flow [2024-06-28 03:14:46,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 1875 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:46,192 INFO L231 Difference]: Finished difference. Result has 145 places, 175 transitions, 1525 flow [2024-06-28 03:14:46,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1525, PETRI_PLACES=145, PETRI_TRANSITIONS=175} [2024-06-28 03:14:46,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-28 03:14:46,193 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 175 transitions, 1525 flow [2024-06-28 03:14:46,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:46,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:46,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:46,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:14:46,194 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:46,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:46,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1504704501, now seen corresponding path program 3 times [2024-06-28 03:14:46,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:46,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803240196] [2024-06-28 03:14:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:46,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:46,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:46,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803240196] [2024-06-28 03:14:46,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803240196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:46,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:46,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086664647] [2024-06-28 03:14:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:46,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:46,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:46,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:46,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:46,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 175 transitions, 1525 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:46,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:46,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:46,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:47,428 INFO L124 PetriNetUnfolderBase]: 2459/3866 cut-off events. [2024-06-28 03:14:47,428 INFO L125 PetriNetUnfolderBase]: For 159215/159219 co-relation queries the response was YES. [2024-06-28 03:14:47,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24036 conditions, 3866 events. 2459/3866 cut-off events. For 159215/159219 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21057 event pairs, 731 based on Foata normal form. 6/3871 useless extension candidates. Maximal degree in co-relation 23967. Up to 3538 conditions per place. [2024-06-28 03:14:47,457 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 139 selfloop transitions, 54 changer transitions 0/197 dead transitions. [2024-06-28 03:14:47,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 197 transitions, 2262 flow [2024-06-28 03:14:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:47,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:14:47,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 03:14:47,472 INFO L175 Difference]: Start difference. First operand has 145 places, 175 transitions, 1525 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:14:47,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 197 transitions, 2262 flow [2024-06-28 03:14:47,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 197 transitions, 2214 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:47,615 INFO L231 Difference]: Finished difference. Result has 149 places, 184 transitions, 1759 flow [2024-06-28 03:14:47,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1759, PETRI_PLACES=149, PETRI_TRANSITIONS=184} [2024-06-28 03:14:47,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-28 03:14:47,616 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 184 transitions, 1759 flow [2024-06-28 03:14:47,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:47,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:47,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:47,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:14:47,617 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:47,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:47,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1198824285, now seen corresponding path program 1 times [2024-06-28 03:14:47,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:47,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432405255] [2024-06-28 03:14:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:47,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:48,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:48,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432405255] [2024-06-28 03:14:48,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432405255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:48,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:48,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:48,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125819002] [2024-06-28 03:14:48,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:48,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:48,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:48,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:48,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:48,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:48,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 184 transitions, 1759 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:48,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:48,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:48,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:48,846 INFO L124 PetriNetUnfolderBase]: 2393/3813 cut-off events. [2024-06-28 03:14:48,846 INFO L125 PetriNetUnfolderBase]: For 170997/171001 co-relation queries the response was YES. [2024-06-28 03:14:48,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24641 conditions, 3813 events. 2393/3813 cut-off events. For 170997/171001 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21058 event pairs, 678 based on Foata normal form. 3/3815 useless extension candidates. Maximal degree in co-relation 24570. Up to 3560 conditions per place. [2024-06-28 03:14:48,878 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 180 selfloop transitions, 25 changer transitions 0/214 dead transitions. [2024-06-28 03:14:48,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 214 transitions, 2333 flow [2024-06-28 03:14:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:14:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:14:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 03:14:48,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:14:48,881 INFO L175 Difference]: Start difference. First operand has 149 places, 184 transitions, 1759 flow. Second operand 9 states and 144 transitions. [2024-06-28 03:14:48,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 214 transitions, 2333 flow [2024-06-28 03:14:49,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 214 transitions, 2189 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:49,029 INFO L231 Difference]: Finished difference. Result has 158 places, 197 transitions, 1820 flow [2024-06-28 03:14:49,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1820, PETRI_PLACES=158, PETRI_TRANSITIONS=197} [2024-06-28 03:14:49,030 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-28 03:14:49,030 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 197 transitions, 1820 flow [2024-06-28 03:14:49,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:49,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:49,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:49,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:14:49,031 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:49,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:49,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1681771293, now seen corresponding path program 2 times [2024-06-28 03:14:49,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:49,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546387577] [2024-06-28 03:14:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:49,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:49,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:49,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546387577] [2024-06-28 03:14:49,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546387577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:49,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:49,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:49,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844715659] [2024-06-28 03:14:49,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:49,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:49,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:49,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 197 transitions, 1820 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:49,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:49,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:49,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:50,272 INFO L124 PetriNetUnfolderBase]: 2403/3827 cut-off events. [2024-06-28 03:14:50,272 INFO L125 PetriNetUnfolderBase]: For 177839/177843 co-relation queries the response was YES. [2024-06-28 03:14:50,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25119 conditions, 3827 events. 2403/3827 cut-off events. For 177839/177843 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21116 event pairs, 677 based on Foata normal form. 3/3829 useless extension candidates. Maximal degree in co-relation 25043. Up to 3566 conditions per place. [2024-06-28 03:14:50,301 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 32 changer transitions 0/220 dead transitions. [2024-06-28 03:14:50,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 220 transitions, 2382 flow [2024-06-28 03:14:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:14:50,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:14:50,303 INFO L175 Difference]: Start difference. First operand has 158 places, 197 transitions, 1820 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:14:50,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 220 transitions, 2382 flow [2024-06-28 03:14:50,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 220 transitions, 2313 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:50,523 INFO L231 Difference]: Finished difference. Result has 162 places, 205 transitions, 1936 flow [2024-06-28 03:14:50,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1936, PETRI_PLACES=162, PETRI_TRANSITIONS=205} [2024-06-28 03:14:50,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-28 03:14:50,524 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 205 transitions, 1936 flow [2024-06-28 03:14:50,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:50,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:50,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:50,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:14:50,524 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:50,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2012067069, now seen corresponding path program 3 times [2024-06-28 03:14:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:50,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874095401] [2024-06-28 03:14:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:50,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:51,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:51,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874095401] [2024-06-28 03:14:51,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874095401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:51,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:51,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:51,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718802862] [2024-06-28 03:14:51,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:51,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:51,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:51,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:51,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:51,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 205 transitions, 1936 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:51,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:51,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:51,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:51,670 INFO L124 PetriNetUnfolderBase]: 2421/3852 cut-off events. [2024-06-28 03:14:51,670 INFO L125 PetriNetUnfolderBase]: For 187653/187657 co-relation queries the response was YES. [2024-06-28 03:14:51,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26095 conditions, 3852 events. 2421/3852 cut-off events. For 187653/187657 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21300 event pairs, 682 based on Foata normal form. 3/3854 useless extension candidates. Maximal degree in co-relation 26017. Up to 3574 conditions per place. [2024-06-28 03:14:51,701 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 179 selfloop transitions, 37 changer transitions 0/225 dead transitions. [2024-06-28 03:14:51,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 225 transitions, 2606 flow [2024-06-28 03:14:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:14:51,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-28 03:14:51,702 INFO L175 Difference]: Start difference. First operand has 162 places, 205 transitions, 1936 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:14:51,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 225 transitions, 2606 flow [2024-06-28 03:14:51,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 225 transitions, 2514 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-28 03:14:51,923 INFO L231 Difference]: Finished difference. Result has 166 places, 211 transitions, 2040 flow [2024-06-28 03:14:51,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2040, PETRI_PLACES=166, PETRI_TRANSITIONS=211} [2024-06-28 03:14:51,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-28 03:14:51,924 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 211 transitions, 2040 flow [2024-06-28 03:14:51,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:51,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:51,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:51,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:14:51,924 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:51,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1681651137, now seen corresponding path program 1 times [2024-06-28 03:14:51,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:51,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658828576] [2024-06-28 03:14:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:51,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:52,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658828576] [2024-06-28 03:14:52,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658828576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:52,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:52,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:52,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782348547] [2024-06-28 03:14:52,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:52,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:52,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:52,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:52,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:52,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:52,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 211 transitions, 2040 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:52,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:52,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:52,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:53,295 INFO L124 PetriNetUnfolderBase]: 2431/3876 cut-off events. [2024-06-28 03:14:53,296 INFO L125 PetriNetUnfolderBase]: For 189690/189694 co-relation queries the response was YES. [2024-06-28 03:14:53,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25945 conditions, 3876 events. 2431/3876 cut-off events. For 189690/189694 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21472 event pairs, 682 based on Foata normal form. 4/3879 useless extension candidates. Maximal degree in co-relation 25866. Up to 3641 conditions per place. [2024-06-28 03:14:53,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 200 selfloop transitions, 18 changer transitions 0/227 dead transitions. [2024-06-28 03:14:53,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 227 transitions, 2558 flow [2024-06-28 03:14:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:14:53,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-28 03:14:53,333 INFO L175 Difference]: Start difference. First operand has 166 places, 211 transitions, 2040 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:14:53,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 227 transitions, 2558 flow [2024-06-28 03:14:53,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 227 transitions, 2476 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 03:14:53,634 INFO L231 Difference]: Finished difference. Result has 169 places, 214 transitions, 2046 flow [2024-06-28 03:14:53,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=169, PETRI_TRANSITIONS=214} [2024-06-28 03:14:53,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-28 03:14:53,639 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 214 transitions, 2046 flow [2024-06-28 03:14:53,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:53,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:53,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:53,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:14:53,640 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:53,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1070914681, now seen corresponding path program 2 times [2024-06-28 03:14:53,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:53,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49470037] [2024-06-28 03:14:53,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:53,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:54,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49470037] [2024-06-28 03:14:54,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49470037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:54,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:54,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:54,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351927472] [2024-06-28 03:14:54,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:54,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:54,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:54,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:54,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:54,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 214 transitions, 2046 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:54,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:54,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:54,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:55,001 INFO L124 PetriNetUnfolderBase]: 2446/3897 cut-off events. [2024-06-28 03:14:55,001 INFO L125 PetriNetUnfolderBase]: For 195762/195770 co-relation queries the response was YES. [2024-06-28 03:14:55,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26381 conditions, 3897 events. 2446/3897 cut-off events. For 195762/195770 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21605 event pairs, 682 based on Foata normal form. 8/3904 useless extension candidates. Maximal degree in co-relation 26301. Up to 3654 conditions per place. [2024-06-28 03:14:55,034 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 23 changer transitions 0/228 dead transitions. [2024-06-28 03:14:55,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 228 transitions, 2564 flow [2024-06-28 03:14:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:55,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 03:14:55,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-28 03:14:55,044 INFO L175 Difference]: Start difference. First operand has 169 places, 214 transitions, 2046 flow. Second operand 7 states and 114 transitions. [2024-06-28 03:14:55,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 228 transitions, 2564 flow [2024-06-28 03:14:55,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 228 transitions, 2502 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:55,346 INFO L231 Difference]: Finished difference. Result has 171 places, 217 transitions, 2086 flow [2024-06-28 03:14:55,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2086, PETRI_PLACES=171, PETRI_TRANSITIONS=217} [2024-06-28 03:14:55,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-28 03:14:55,347 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 217 transitions, 2086 flow [2024-06-28 03:14:55,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:55,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:55,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:55,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:14:55,348 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:55,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:55,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1070914495, now seen corresponding path program 4 times [2024-06-28 03:14:55,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:55,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135510720] [2024-06-28 03:14:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:55,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:56,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:56,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135510720] [2024-06-28 03:14:56,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135510720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:56,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:56,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:14:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899741331] [2024-06-28 03:14:56,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:56,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:14:56,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:56,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:14:56,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:14:56,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:56,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 217 transitions, 2086 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:56,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:56,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:56,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:56,751 INFO L124 PetriNetUnfolderBase]: 2413/3862 cut-off events. [2024-06-28 03:14:56,751 INFO L125 PetriNetUnfolderBase]: For 201767/201775 co-relation queries the response was YES. [2024-06-28 03:14:56,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26485 conditions, 3862 events. 2413/3862 cut-off events. For 201767/201775 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21586 event pairs, 671 based on Foata normal form. 3/3864 useless extension candidates. Maximal degree in co-relation 26404. Up to 3560 conditions per place. [2024-06-28 03:14:56,785 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 45 changer transitions 0/232 dead transitions. [2024-06-28 03:14:56,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 232 transitions, 2714 flow [2024-06-28 03:14:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:14:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:14:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:14:56,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-28 03:14:56,786 INFO L175 Difference]: Start difference. First operand has 171 places, 217 transitions, 2086 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:14:56,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 232 transitions, 2714 flow [2024-06-28 03:14:57,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 232 transitions, 2636 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:14:57,107 INFO L231 Difference]: Finished difference. Result has 174 places, 220 transitions, 2164 flow [2024-06-28 03:14:57,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2164, PETRI_PLACES=174, PETRI_TRANSITIONS=220} [2024-06-28 03:14:57,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-28 03:14:57,107 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 220 transitions, 2164 flow [2024-06-28 03:14:57,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:57,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:57,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:57,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:14:57,108 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:57,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1071151831, now seen corresponding path program 3 times [2024-06-28 03:14:57,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:57,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414296116] [2024-06-28 03:14:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:57,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:57,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414296116] [2024-06-28 03:14:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414296116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:57,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:57,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:57,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012280279] [2024-06-28 03:14:57,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:57,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:57,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:57,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:57,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:57,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:14:57,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 220 transitions, 2164 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:57,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:57,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:14:57,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:14:58,496 INFO L124 PetriNetUnfolderBase]: 2433/3880 cut-off events. [2024-06-28 03:14:58,497 INFO L125 PetriNetUnfolderBase]: For 207358/207366 co-relation queries the response was YES. [2024-06-28 03:14:58,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26891 conditions, 3880 events. 2433/3880 cut-off events. For 207358/207366 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21552 event pairs, 678 based on Foata normal form. 8/3887 useless extension candidates. Maximal degree in co-relation 26809. Up to 3613 conditions per place. [2024-06-28 03:14:58,531 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 195 selfloop transitions, 35 changer transitions 0/239 dead transitions. [2024-06-28 03:14:58,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 239 transitions, 2872 flow [2024-06-28 03:14:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:14:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:14:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:14:58,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-28 03:14:58,532 INFO L175 Difference]: Start difference. First operand has 174 places, 220 transitions, 2164 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:14:58,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 239 transitions, 2872 flow [2024-06-28 03:14:58,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 239 transitions, 2738 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 03:14:58,832 INFO L231 Difference]: Finished difference. Result has 176 places, 226 transitions, 2244 flow [2024-06-28 03:14:58,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2030, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2244, PETRI_PLACES=176, PETRI_TRANSITIONS=226} [2024-06-28 03:14:58,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-28 03:14:58,833 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 226 transitions, 2244 flow [2024-06-28 03:14:58,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:58,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:14:58,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:14:58,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:14:58,833 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:14:58,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:14:58,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1504273539, now seen corresponding path program 1 times [2024-06-28 03:14:58,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:14:58,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708633371] [2024-06-28 03:14:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:14:58,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:14:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:14:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:14:59,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:14:59,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708633371] [2024-06-28 03:14:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708633371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:14:59,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:14:59,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:14:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202073343] [2024-06-28 03:14:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:14:59,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:14:59,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:14:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:14:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:14:59,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:14:59,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 226 transitions, 2244 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:14:59,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:14:59,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:14:59,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:00,482 INFO L124 PetriNetUnfolderBase]: 2537/3981 cut-off events. [2024-06-28 03:15:00,482 INFO L125 PetriNetUnfolderBase]: For 213187/213191 co-relation queries the response was YES. [2024-06-28 03:15:00,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27802 conditions, 3981 events. 2537/3981 cut-off events. For 213187/213191 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21695 event pairs, 714 based on Foata normal form. 2/3982 useless extension candidates. Maximal degree in co-relation 27718. Up to 3851 conditions per place. [2024-06-28 03:15:00,519 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 213 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2024-06-28 03:15:00,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 235 transitions, 2732 flow [2024-06-28 03:15:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-28 03:15:00,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-28 03:15:00,520 INFO L175 Difference]: Start difference. First operand has 176 places, 226 transitions, 2244 flow. Second operand 8 states and 115 transitions. [2024-06-28 03:15:00,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 235 transitions, 2732 flow [2024-06-28 03:15:00,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 235 transitions, 2627 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-28 03:15:00,796 INFO L231 Difference]: Finished difference. Result has 181 places, 226 transitions, 2183 flow [2024-06-28 03:15:00,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2183, PETRI_PLACES=181, PETRI_TRANSITIONS=226} [2024-06-28 03:15:00,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-28 03:15:00,797 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 226 transitions, 2183 flow [2024-06-28 03:15:00,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:00,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:00,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:00,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:15:00,797 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:00,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:00,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1802671895, now seen corresponding path program 1 times [2024-06-28 03:15:00,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:00,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232110042] [2024-06-28 03:15:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:00,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:01,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:01,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232110042] [2024-06-28 03:15:01,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232110042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:01,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:01,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777550432] [2024-06-28 03:15:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:01,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:01,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:01,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:01,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:01,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 226 transitions, 2183 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:01,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:01,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:01,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:02,231 INFO L124 PetriNetUnfolderBase]: 2547/3998 cut-off events. [2024-06-28 03:15:02,232 INFO L125 PetriNetUnfolderBase]: For 221626/221636 co-relation queries the response was YES. [2024-06-28 03:15:02,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27957 conditions, 3998 events. 2547/3998 cut-off events. For 221626/221636 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21836 event pairs, 656 based on Foata normal form. 12/4009 useless extension candidates. Maximal degree in co-relation 27871. Up to 3721 conditions per place. [2024-06-28 03:15:02,269 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 44 changer transitions 0/254 dead transitions. [2024-06-28 03:15:02,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 254 transitions, 2841 flow [2024-06-28 03:15:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:02,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:15:02,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-28 03:15:02,270 INFO L175 Difference]: Start difference. First operand has 181 places, 226 transitions, 2183 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:15:02,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 254 transitions, 2841 flow [2024-06-28 03:15:02,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 254 transitions, 2755 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 03:15:02,554 INFO L231 Difference]: Finished difference. Result has 181 places, 230 transitions, 2268 flow [2024-06-28 03:15:02,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2268, PETRI_PLACES=181, PETRI_TRANSITIONS=230} [2024-06-28 03:15:02,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-28 03:15:02,555 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 230 transitions, 2268 flow [2024-06-28 03:15:02,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:02,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:02,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:02,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:15:02,556 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:02,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1799127758, now seen corresponding path program 1 times [2024-06-28 03:15:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771445717] [2024-06-28 03:15:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:03,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771445717] [2024-06-28 03:15:03,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771445717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:03,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:03,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:03,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004512292] [2024-06-28 03:15:03,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:03,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:03,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:03,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:03,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:03,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 230 transitions, 2268 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:03,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:03,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:03,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:03,860 INFO L124 PetriNetUnfolderBase]: 2557/4005 cut-off events. [2024-06-28 03:15:03,861 INFO L125 PetriNetUnfolderBase]: For 231031/231039 co-relation queries the response was YES. [2024-06-28 03:15:03,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28764 conditions, 4005 events. 2557/4005 cut-off events. For 231031/231039 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21834 event pairs, 663 based on Foata normal form. 7/4011 useless extension candidates. Maximal degree in co-relation 28678. Up to 3737 conditions per place. [2024-06-28 03:15:03,895 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 40 changer transitions 0/254 dead transitions. [2024-06-28 03:15:03,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 254 transitions, 2899 flow [2024-06-28 03:15:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:15:03,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:15:03,900 INFO L175 Difference]: Start difference. First operand has 181 places, 230 transitions, 2268 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:15:03,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 254 transitions, 2899 flow [2024-06-28 03:15:04,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 254 transitions, 2756 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:04,335 INFO L231 Difference]: Finished difference. Result has 182 places, 234 transitions, 2279 flow [2024-06-28 03:15:04,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2279, PETRI_PLACES=182, PETRI_TRANSITIONS=234} [2024-06-28 03:15:04,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-28 03:15:04,336 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 234 transitions, 2279 flow [2024-06-28 03:15:04,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:04,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:04,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:04,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:15:04,336 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:04,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:04,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1793413838, now seen corresponding path program 2 times [2024-06-28 03:15:04,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:04,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391564513] [2024-06-28 03:15:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:04,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:05,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:05,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391564513] [2024-06-28 03:15:05,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391564513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:05,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:05,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:05,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148342493] [2024-06-28 03:15:05,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:05,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:05,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:05,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:05,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 234 transitions, 2279 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:05,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:05,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:05,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:05,711 INFO L124 PetriNetUnfolderBase]: 2559/4009 cut-off events. [2024-06-28 03:15:05,712 INFO L125 PetriNetUnfolderBase]: For 238271/238279 co-relation queries the response was YES. [2024-06-28 03:15:05,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28861 conditions, 4009 events. 2559/4009 cut-off events. For 238271/238279 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21886 event pairs, 664 based on Foata normal form. 7/4015 useless extension candidates. Maximal degree in co-relation 28774. Up to 3700 conditions per place. [2024-06-28 03:15:05,750 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 201 selfloop transitions, 49 changer transitions 0/254 dead transitions. [2024-06-28 03:15:05,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 254 transitions, 2995 flow [2024-06-28 03:15:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 03:15:05,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-28 03:15:05,751 INFO L175 Difference]: Start difference. First operand has 182 places, 234 transitions, 2279 flow. Second operand 7 states and 118 transitions. [2024-06-28 03:15:05,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 254 transitions, 2995 flow [2024-06-28 03:15:06,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 254 transitions, 2886 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:15:06,224 INFO L231 Difference]: Finished difference. Result has 184 places, 237 transitions, 2335 flow [2024-06-28 03:15:06,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2335, PETRI_PLACES=184, PETRI_TRANSITIONS=237} [2024-06-28 03:15:06,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-28 03:15:06,225 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 237 transitions, 2335 flow [2024-06-28 03:15:06,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:06,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:06,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:06,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:15:06,226 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:06,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:06,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1793417465, now seen corresponding path program 2 times [2024-06-28 03:15:06,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:06,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214792383] [2024-06-28 03:15:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:06,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:07,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:07,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214792383] [2024-06-28 03:15:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214792383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:07,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:07,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:07,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113593634] [2024-06-28 03:15:07,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:07,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:07,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:07,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:07,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:07,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 237 transitions, 2335 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:07,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:07,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:07,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:07,787 INFO L124 PetriNetUnfolderBase]: 2571/4028 cut-off events. [2024-06-28 03:15:07,788 INFO L125 PetriNetUnfolderBase]: For 247847/247855 co-relation queries the response was YES. [2024-06-28 03:15:07,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29155 conditions, 4028 events. 2571/4028 cut-off events. For 247847/247855 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22008 event pairs, 664 based on Foata normal form. 7/4034 useless extension candidates. Maximal degree in co-relation 29067. Up to 3710 conditions per place. [2024-06-28 03:15:07,825 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 201 selfloop transitions, 54 changer transitions 0/259 dead transitions. [2024-06-28 03:15:07,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 259 transitions, 3085 flow [2024-06-28 03:15:07,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:15:07,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 03:15:07,835 INFO L175 Difference]: Start difference. First operand has 184 places, 237 transitions, 2335 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:15:07,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 259 transitions, 3085 flow [2024-06-28 03:15:08,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 259 transitions, 2975 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 03:15:08,246 INFO L231 Difference]: Finished difference. Result has 188 places, 241 transitions, 2424 flow [2024-06-28 03:15:08,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2424, PETRI_PLACES=188, PETRI_TRANSITIONS=241} [2024-06-28 03:15:08,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-28 03:15:08,246 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 241 transitions, 2424 flow [2024-06-28 03:15:08,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:08,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:08,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:08,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:15:08,247 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:08,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1793406305, now seen corresponding path program 3 times [2024-06-28 03:15:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:08,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661078595] [2024-06-28 03:15:08,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:08,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661078595] [2024-06-28 03:15:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661078595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:09,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:09,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:09,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857051092] [2024-06-28 03:15:09,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:09,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:09,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:09,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 241 transitions, 2424 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:09,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:09,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:09,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:09,833 INFO L124 PetriNetUnfolderBase]: 2599/4074 cut-off events. [2024-06-28 03:15:09,833 INFO L125 PetriNetUnfolderBase]: For 260484/260492 co-relation queries the response was YES. [2024-06-28 03:15:09,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30182 conditions, 4074 events. 2599/4074 cut-off events. For 260484/260492 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 22331 event pairs, 663 based on Foata normal form. 7/4080 useless extension candidates. Maximal degree in co-relation 30093. Up to 3710 conditions per place. [2024-06-28 03:15:09,872 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 203 selfloop transitions, 61 changer transitions 0/268 dead transitions. [2024-06-28 03:15:09,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 268 transitions, 3384 flow [2024-06-28 03:15:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:15:09,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-28 03:15:09,873 INFO L175 Difference]: Start difference. First operand has 188 places, 241 transitions, 2424 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:15:09,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 268 transitions, 3384 flow [2024-06-28 03:15:10,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 268 transitions, 3213 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:10,357 INFO L231 Difference]: Finished difference. Result has 191 places, 249 transitions, 2570 flow [2024-06-28 03:15:10,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2570, PETRI_PLACES=191, PETRI_TRANSITIONS=249} [2024-06-28 03:15:10,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-28 03:15:10,358 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 249 transitions, 2570 flow [2024-06-28 03:15:10,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:10,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:10,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:10,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:15:10,358 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:10,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1103189142, now seen corresponding path program 1 times [2024-06-28 03:15:10,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:10,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192151270] [2024-06-28 03:15:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:10,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:11,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192151270] [2024-06-28 03:15:11,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192151270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:11,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:11,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:11,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934198346] [2024-06-28 03:15:11,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:11,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:11,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:11,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:11,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:11,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:11,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 249 transitions, 2570 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:11,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:11,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:11,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:11,986 INFO L124 PetriNetUnfolderBase]: 2604/4086 cut-off events. [2024-06-28 03:15:11,987 INFO L125 PetriNetUnfolderBase]: For 268641/268647 co-relation queries the response was YES. [2024-06-28 03:15:12,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30929 conditions, 4086 events. 2604/4086 cut-off events. For 268641/268647 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 22337 event pairs, 682 based on Foata normal form. 7/4092 useless extension candidates. Maximal degree in co-relation 30838. Up to 3926 conditions per place. [2024-06-28 03:15:12,030 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 20 changer transitions 0/269 dead transitions. [2024-06-28 03:15:12,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 269 transitions, 3226 flow [2024-06-28 03:15:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-28 03:15:12,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 03:15:12,031 INFO L175 Difference]: Start difference. First operand has 191 places, 249 transitions, 2570 flow. Second operand 8 states and 123 transitions. [2024-06-28 03:15:12,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 269 transitions, 3226 flow [2024-06-28 03:15:12,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 269 transitions, 3073 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-28 03:15:12,568 INFO L231 Difference]: Finished difference. Result has 195 places, 252 transitions, 2535 flow [2024-06-28 03:15:12,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2535, PETRI_PLACES=195, PETRI_TRANSITIONS=252} [2024-06-28 03:15:12,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-28 03:15:12,568 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 252 transitions, 2535 flow [2024-06-28 03:15:12,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:12,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:12,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:12,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:15:12,569 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:12,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:12,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2038995828, now seen corresponding path program 3 times [2024-06-28 03:15:12,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:12,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390039568] [2024-06-28 03:15:12,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:12,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:13,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:13,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390039568] [2024-06-28 03:15:13,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390039568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:13,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:13,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732932341] [2024-06-28 03:15:13,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:13,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:13,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:13,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:13,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 252 transitions, 2535 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:13,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:13,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:13,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:13,851 INFO L124 PetriNetUnfolderBase]: 2597/4066 cut-off events. [2024-06-28 03:15:13,851 INFO L125 PetriNetUnfolderBase]: For 274632/274636 co-relation queries the response was YES. [2024-06-28 03:15:13,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31096 conditions, 4066 events. 2597/4066 cut-off events. For 274632/274636 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22176 event pairs, 667 based on Foata normal form. 2/4065 useless extension candidates. Maximal degree in co-relation 31003. Up to 3802 conditions per place. [2024-06-28 03:15:13,888 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 227 selfloop transitions, 39 changer transitions 0/270 dead transitions. [2024-06-28 03:15:13,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 270 transitions, 3135 flow [2024-06-28 03:15:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:15:13,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-28 03:15:13,890 INFO L175 Difference]: Start difference. First operand has 195 places, 252 transitions, 2535 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:15:13,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 270 transitions, 3135 flow [2024-06-28 03:15:14,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 270 transitions, 3013 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:14,313 INFO L231 Difference]: Finished difference. Result has 196 places, 252 transitions, 2498 flow [2024-06-28 03:15:14,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2413, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=196, PETRI_TRANSITIONS=252} [2024-06-28 03:15:14,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-28 03:15:14,314 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 252 transitions, 2498 flow [2024-06-28 03:15:14,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:14,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:14,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:14,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:15:14,314 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:14,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2050423668, now seen corresponding path program 4 times [2024-06-28 03:15:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:14,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842515547] [2024-06-28 03:15:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:14,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:14,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842515547] [2024-06-28 03:15:14,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842515547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:14,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:14,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:14,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667977331] [2024-06-28 03:15:14,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:14,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:14,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:14,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:14,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 252 transitions, 2498 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:14,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:14,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:14,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:15,698 INFO L124 PetriNetUnfolderBase]: 2602/4071 cut-off events. [2024-06-28 03:15:15,699 INFO L125 PetriNetUnfolderBase]: For 283857/283861 co-relation queries the response was YES. [2024-06-28 03:15:15,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31371 conditions, 4071 events. 2602/4071 cut-off events. For 283857/283861 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22161 event pairs, 665 based on Foata normal form. 2/4070 useless extension candidates. Maximal degree in co-relation 31277. Up to 3787 conditions per place. [2024-06-28 03:15:15,809 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 47 changer transitions 0/270 dead transitions. [2024-06-28 03:15:15,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 270 transitions, 3138 flow [2024-06-28 03:15:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:15:15,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-28 03:15:15,810 INFO L175 Difference]: Start difference. First operand has 196 places, 252 transitions, 2498 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:15:15,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 270 transitions, 3138 flow [2024-06-28 03:15:16,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 270 transitions, 2998 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:15:16,182 INFO L231 Difference]: Finished difference. Result has 196 places, 255 transitions, 2516 flow [2024-06-28 03:15:16,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2516, PETRI_PLACES=196, PETRI_TRANSITIONS=255} [2024-06-28 03:15:16,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-28 03:15:16,183 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 255 transitions, 2516 flow [2024-06-28 03:15:16,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:16,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:16,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:16,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:15:16,183 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:16,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1418667896, now seen corresponding path program 5 times [2024-06-28 03:15:16,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:16,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531589189] [2024-06-28 03:15:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:16,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:16,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:16,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531589189] [2024-06-28 03:15:16,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531589189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:16,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:16,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:16,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321755442] [2024-06-28 03:15:16,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:16,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:16,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:16,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:16,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:16,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:16,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 255 transitions, 2516 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:16,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:16,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:16,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:17,572 INFO L124 PetriNetUnfolderBase]: 2604/4079 cut-off events. [2024-06-28 03:15:17,572 INFO L125 PetriNetUnfolderBase]: For 293600/293608 co-relation queries the response was YES. [2024-06-28 03:15:17,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31496 conditions, 4079 events. 2604/4079 cut-off events. For 293600/293608 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 22298 event pairs, 685 based on Foata normal form. 7/4084 useless extension candidates. Maximal degree in co-relation 31401. Up to 3727 conditions per place. [2024-06-28 03:15:17,603 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 63 changer transitions 0/270 dead transitions. [2024-06-28 03:15:17,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 270 transitions, 3260 flow [2024-06-28 03:15:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:15:17,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-28 03:15:17,605 INFO L175 Difference]: Start difference. First operand has 196 places, 255 transitions, 2516 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:15:17,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 270 transitions, 3260 flow [2024-06-28 03:15:17,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 270 transitions, 3134 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:15:17,994 INFO L231 Difference]: Finished difference. Result has 198 places, 258 transitions, 2584 flow [2024-06-28 03:15:17,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2584, PETRI_PLACES=198, PETRI_TRANSITIONS=258} [2024-06-28 03:15:17,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-28 03:15:17,996 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 258 transitions, 2584 flow [2024-06-28 03:15:17,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:17,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:17,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:17,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:15:17,996 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:17,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:17,997 INFO L85 PathProgramCache]: Analyzing trace with hash 604519730, now seen corresponding path program 6 times [2024-06-28 03:15:17,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:17,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944852180] [2024-06-28 03:15:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:18,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:18,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944852180] [2024-06-28 03:15:18,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944852180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:18,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:18,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:15:18,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815622056] [2024-06-28 03:15:18,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:18,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:15:18,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:18,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:15:18,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:15:18,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:18,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 258 transitions, 2584 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:18,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:18,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:18,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:19,388 INFO L124 PetriNetUnfolderBase]: 2599/4073 cut-off events. [2024-06-28 03:15:19,388 INFO L125 PetriNetUnfolderBase]: For 299792/299800 co-relation queries the response was YES. [2024-06-28 03:15:19,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31564 conditions, 4073 events. 2599/4073 cut-off events. For 299792/299800 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 22229 event pairs, 686 based on Foata normal form. 6/4077 useless extension candidates. Maximal degree in co-relation 31468. Up to 3722 conditions per place. [2024-06-28 03:15:19,428 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 198 selfloop transitions, 67 changer transitions 0/269 dead transitions. [2024-06-28 03:15:19,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 269 transitions, 3152 flow [2024-06-28 03:15:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 03:15:19,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-28 03:15:19,430 INFO L175 Difference]: Start difference. First operand has 198 places, 258 transitions, 2584 flow. Second operand 7 states and 113 transitions. [2024-06-28 03:15:19,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 269 transitions, 3152 flow [2024-06-28 03:15:19,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 269 transitions, 2972 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 03:15:19,834 INFO L231 Difference]: Finished difference. Result has 201 places, 258 transitions, 2544 flow [2024-06-28 03:15:19,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2544, PETRI_PLACES=201, PETRI_TRANSITIONS=258} [2024-06-28 03:15:19,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-28 03:15:19,836 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 258 transitions, 2544 flow [2024-06-28 03:15:19,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:19,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:19,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:19,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:15:19,836 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:19,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:19,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1167101640, now seen corresponding path program 2 times [2024-06-28 03:15:19,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:19,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826952146] [2024-06-28 03:15:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:19,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:20,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:20,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826952146] [2024-06-28 03:15:20,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826952146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:20,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:20,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:20,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304671319] [2024-06-28 03:15:20,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:20,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:20,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:20,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:20,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:20,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 258 transitions, 2544 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:20,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:20,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:20,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:21,445 INFO L124 PetriNetUnfolderBase]: 2609/4092 cut-off events. [2024-06-28 03:15:21,446 INFO L125 PetriNetUnfolderBase]: For 311414/311422 co-relation queries the response was YES. [2024-06-28 03:15:21,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31828 conditions, 4092 events. 2609/4092 cut-off events. For 311414/311422 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22396 event pairs, 687 based on Foata normal form. 10/4101 useless extension candidates. Maximal degree in co-relation 31731. Up to 3924 conditions per place. [2024-06-28 03:15:21,488 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 246 selfloop transitions, 24 changer transitions 0/274 dead transitions. [2024-06-28 03:15:21,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 274 transitions, 3206 flow [2024-06-28 03:15:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-28 03:15:21,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-28 03:15:21,489 INFO L175 Difference]: Start difference. First operand has 201 places, 258 transitions, 2544 flow. Second operand 8 states and 120 transitions. [2024-06-28 03:15:21,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 274 transitions, 3206 flow [2024-06-28 03:15:22,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 274 transitions, 3032 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 03:15:22,077 INFO L231 Difference]: Finished difference. Result has 202 places, 261 transitions, 2504 flow [2024-06-28 03:15:22,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2504, PETRI_PLACES=202, PETRI_TRANSITIONS=261} [2024-06-28 03:15:22,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-28 03:15:22,077 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 261 transitions, 2504 flow [2024-06-28 03:15:22,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:22,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:22,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:22,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:15:22,078 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:22,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:22,079 INFO L85 PathProgramCache]: Analyzing trace with hash 598813343, now seen corresponding path program 4 times [2024-06-28 03:15:22,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:22,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113151937] [2024-06-28 03:15:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:22,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:22,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:22,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113151937] [2024-06-28 03:15:22,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113151937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:22,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:22,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:22,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331163446] [2024-06-28 03:15:22,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:22,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:22,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:22,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:22,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:23,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:23,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 261 transitions, 2504 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:23,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:23,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:23,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:23,649 INFO L124 PetriNetUnfolderBase]: 2645/4142 cut-off events. [2024-06-28 03:15:23,650 INFO L125 PetriNetUnfolderBase]: For 327389/327397 co-relation queries the response was YES. [2024-06-28 03:15:23,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32752 conditions, 4142 events. 2645/4142 cut-off events. For 327389/327397 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22646 event pairs, 686 based on Foata normal form. 7/4147 useless extension candidates. Maximal degree in co-relation 32654. Up to 3751 conditions per place. [2024-06-28 03:15:23,690 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 209 selfloop transitions, 70 changer transitions 0/283 dead transitions. [2024-06-28 03:15:23,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 283 transitions, 3446 flow [2024-06-28 03:15:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:15:23,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-28 03:15:23,691 INFO L175 Difference]: Start difference. First operand has 202 places, 261 transitions, 2504 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:15:23,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 283 transitions, 3446 flow [2024-06-28 03:15:24,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 283 transitions, 3340 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:24,193 INFO L231 Difference]: Finished difference. Result has 205 places, 269 transitions, 2750 flow [2024-06-28 03:15:24,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2750, PETRI_PLACES=205, PETRI_TRANSITIONS=269} [2024-06-28 03:15:24,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-28 03:15:24,194 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 269 transitions, 2750 flow [2024-06-28 03:15:24,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:24,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:24,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:24,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:15:24,194 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:24,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1418664269, now seen corresponding path program 5 times [2024-06-28 03:15:24,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:24,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271706660] [2024-06-28 03:15:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:24,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271706660] [2024-06-28 03:15:24,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271706660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:24,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:24,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:24,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681971512] [2024-06-28 03:15:24,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:24,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:24,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:24,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 269 transitions, 2750 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:24,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:24,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:24,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:25,675 INFO L124 PetriNetUnfolderBase]: 2647/4145 cut-off events. [2024-06-28 03:15:25,676 INFO L125 PetriNetUnfolderBase]: For 339172/339180 co-relation queries the response was YES. [2024-06-28 03:15:25,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33514 conditions, 4145 events. 2647/4145 cut-off events. For 339172/339180 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22706 event pairs, 686 based on Foata normal form. 7/4150 useless extension candidates. Maximal degree in co-relation 33414. Up to 3783 conditions per place. [2024-06-28 03:15:25,721 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 69 changer transitions 0/285 dead transitions. [2024-06-28 03:15:25,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 285 transitions, 3459 flow [2024-06-28 03:15:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:15:25,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 03:15:25,723 INFO L175 Difference]: Start difference. First operand has 205 places, 269 transitions, 2750 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:15:25,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 285 transitions, 3459 flow [2024-06-28 03:15:26,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 285 transitions, 3251 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-28 03:15:26,394 INFO L231 Difference]: Finished difference. Result has 209 places, 273 transitions, 2802 flow [2024-06-28 03:15:26,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2802, PETRI_PLACES=209, PETRI_TRANSITIONS=273} [2024-06-28 03:15:26,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-28 03:15:26,396 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 273 transitions, 2802 flow [2024-06-28 03:15:26,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:26,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:26,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:26,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:15:26,396 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:26,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:26,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1154214630, now seen corresponding path program 3 times [2024-06-28 03:15:26,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:26,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893871152] [2024-06-28 03:15:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:26,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:27,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893871152] [2024-06-28 03:15:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893871152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:27,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:27,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:27,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941071751] [2024-06-28 03:15:27,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:27,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:27,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:27,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:27,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:27,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:27,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 273 transitions, 2802 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:27,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:27,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:27,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:27,991 INFO L124 PetriNetUnfolderBase]: 2652/4157 cut-off events. [2024-06-28 03:15:27,992 INFO L125 PetriNetUnfolderBase]: For 348639/348647 co-relation queries the response was YES. [2024-06-28 03:15:28,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33855 conditions, 4157 events. 2652/4157 cut-off events. For 348639/348647 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22823 event pairs, 687 based on Foata normal form. 9/4165 useless extension candidates. Maximal degree in co-relation 33753. Up to 3965 conditions per place. [2024-06-28 03:15:28,037 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 250 selfloop transitions, 41 changer transitions 0/295 dead transitions. [2024-06-28 03:15:28,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 295 transitions, 3736 flow [2024-06-28 03:15:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-28 03:15:28,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-28 03:15:28,038 INFO L175 Difference]: Start difference. First operand has 209 places, 273 transitions, 2802 flow. Second operand 8 states and 123 transitions. [2024-06-28 03:15:28,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 295 transitions, 3736 flow [2024-06-28 03:15:28,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 295 transitions, 3531 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:28,769 INFO L231 Difference]: Finished difference. Result has 212 places, 282 transitions, 2897 flow [2024-06-28 03:15:28,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2897, PETRI_PLACES=212, PETRI_TRANSITIONS=282} [2024-06-28 03:15:28,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-28 03:15:28,770 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 282 transitions, 2897 flow [2024-06-28 03:15:28,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:28,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:28,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:28,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:15:28,771 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:28,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:28,771 INFO L85 PathProgramCache]: Analyzing trace with hash 611700353, now seen corresponding path program 6 times [2024-06-28 03:15:28,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:28,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822675895] [2024-06-28 03:15:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:28,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:29,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:29,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822675895] [2024-06-28 03:15:29,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822675895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:29,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:29,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:29,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433920798] [2024-06-28 03:15:29,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:29,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:29,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:29,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:29,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:29,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:29,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 282 transitions, 2897 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:29,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:29,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:29,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:30,485 INFO L124 PetriNetUnfolderBase]: 2656/4159 cut-off events. [2024-06-28 03:15:30,485 INFO L125 PetriNetUnfolderBase]: For 359241/359249 co-relation queries the response was YES. [2024-06-28 03:15:30,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34092 conditions, 4159 events. 2656/4159 cut-off events. For 359241/359249 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22769 event pairs, 683 based on Foata normal form. 7/4164 useless extension candidates. Maximal degree in co-relation 33988. Up to 3688 conditions per place. [2024-06-28 03:15:30,527 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 208 selfloop transitions, 99 changer transitions 0/311 dead transitions. [2024-06-28 03:15:30,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 311 transitions, 4065 flow [2024-06-28 03:15:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:15:30,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 03:15:30,528 INFO L175 Difference]: Start difference. First operand has 212 places, 282 transitions, 2897 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:15:30,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 311 transitions, 4065 flow [2024-06-28 03:15:31,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 311 transitions, 3956 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-28 03:15:31,068 INFO L231 Difference]: Finished difference. Result has 219 places, 297 transitions, 3331 flow [2024-06-28 03:15:31,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3331, PETRI_PLACES=219, PETRI_TRANSITIONS=297} [2024-06-28 03:15:31,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-28 03:15:31,069 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 297 transitions, 3331 flow [2024-06-28 03:15:31,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:31,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:31,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:31,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:15:31,070 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:31,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1419063642, now seen corresponding path program 4 times [2024-06-28 03:15:31,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:31,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073499915] [2024-06-28 03:15:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:31,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:31,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:31,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073499915] [2024-06-28 03:15:31,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073499915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:31,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:31,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414389721] [2024-06-28 03:15:31,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:31,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:31,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:31,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 297 transitions, 3331 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:31,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:31,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:31,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:32,636 INFO L124 PetriNetUnfolderBase]: 2658/4164 cut-off events. [2024-06-28 03:15:32,636 INFO L125 PetriNetUnfolderBase]: For 373141/373145 co-relation queries the response was YES. [2024-06-28 03:15:32,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35153 conditions, 4164 events. 2658/4164 cut-off events. For 373141/373145 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22811 event pairs, 710 based on Foata normal form. 3/4166 useless extension candidates. Maximal degree in co-relation 35045. Up to 4013 conditions per place. [2024-06-28 03:15:32,679 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 284 selfloop transitions, 22 changer transitions 0/310 dead transitions. [2024-06-28 03:15:32,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 310 transitions, 4065 flow [2024-06-28 03:15:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-28 03:15:32,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-28 03:15:32,681 INFO L175 Difference]: Start difference. First operand has 219 places, 297 transitions, 3331 flow. Second operand 8 states and 119 transitions. [2024-06-28 03:15:32,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 310 transitions, 4065 flow [2024-06-28 03:15:33,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 310 transitions, 3789 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-06-28 03:15:33,377 INFO L231 Difference]: Finished difference. Result has 224 places, 300 transitions, 3208 flow [2024-06-28 03:15:33,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3208, PETRI_PLACES=224, PETRI_TRANSITIONS=300} [2024-06-28 03:15:33,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-28 03:15:33,378 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 300 transitions, 3208 flow [2024-06-28 03:15:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:33,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:33,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:33,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:15:33,379 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:33,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash 577044768, now seen corresponding path program 1 times [2024-06-28 03:15:33,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:33,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151587066] [2024-06-28 03:15:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:33,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:34,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:34,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151587066] [2024-06-28 03:15:34,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151587066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:34,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:34,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:34,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9049584] [2024-06-28 03:15:34,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:34,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:34,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:34,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:34,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:34,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:15:34,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 300 transitions, 3208 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:34,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:34,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:15:34,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:35,066 INFO L124 PetriNetUnfolderBase]: 2571/4076 cut-off events. [2024-06-28 03:15:35,066 INFO L125 PetriNetUnfolderBase]: For 375582/375586 co-relation queries the response was YES. [2024-06-28 03:15:35,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34133 conditions, 4076 events. 2571/4076 cut-off events. For 375582/375586 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22665 event pairs, 671 based on Foata normal form. 2/4077 useless extension candidates. Maximal degree in co-relation 34023. Up to 3751 conditions per place. [2024-06-28 03:15:35,105 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 263 selfloop transitions, 33 changer transitions 0/315 dead transitions. [2024-06-28 03:15:35,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 315 transitions, 3848 flow [2024-06-28 03:15:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:15:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:15:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:15:35,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:15:35,107 INFO L175 Difference]: Start difference. First operand has 224 places, 300 transitions, 3208 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:15:35,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 315 transitions, 3848 flow [2024-06-28 03:15:35,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 315 transitions, 3699 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:35,754 INFO L231 Difference]: Finished difference. Result has 225 places, 300 transitions, 3141 flow [2024-06-28 03:15:35,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3059, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3141, PETRI_PLACES=225, PETRI_TRANSITIONS=300} [2024-06-28 03:15:35,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-28 03:15:35,755 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 300 transitions, 3141 flow [2024-06-28 03:15:35,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:35,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:35,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:35,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:15:35,756 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:35,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash -595301073, now seen corresponding path program 1 times [2024-06-28 03:15:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:35,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687426403] [2024-06-28 03:15:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:35,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:36,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:36,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687426403] [2024-06-28 03:15:36,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687426403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:36,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:36,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:36,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089991070] [2024-06-28 03:15:36,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:36,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:36,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:36,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:15:36,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 300 transitions, 3141 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:36,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:36,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:15:36,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:37,372 INFO L124 PetriNetUnfolderBase]: 2581/4094 cut-off events. [2024-06-28 03:15:37,372 INFO L125 PetriNetUnfolderBase]: For 392414/392418 co-relation queries the response was YES. [2024-06-28 03:15:37,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34398 conditions, 4094 events. 2581/4094 cut-off events. For 392414/392418 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22820 event pairs, 667 based on Foata normal form. 5/4098 useless extension candidates. Maximal degree in co-relation 34287. Up to 3758 conditions per place. [2024-06-28 03:15:37,416 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 35 changer transitions 0/320 dead transitions. [2024-06-28 03:15:37,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 320 transitions, 3845 flow [2024-06-28 03:15:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:15:37,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-28 03:15:37,417 INFO L175 Difference]: Start difference. First operand has 225 places, 300 transitions, 3141 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:15:37,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 320 transitions, 3845 flow [2024-06-28 03:15:38,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 320 transitions, 3768 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:38,217 INFO L231 Difference]: Finished difference. Result has 227 places, 303 transitions, 3195 flow [2024-06-28 03:15:38,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3064, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3195, PETRI_PLACES=227, PETRI_TRANSITIONS=303} [2024-06-28 03:15:38,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-28 03:15:38,218 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 303 transitions, 3195 flow [2024-06-28 03:15:38,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:38,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:38,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:38,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:15:38,219 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:38,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2050437339, now seen corresponding path program 2 times [2024-06-28 03:15:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:38,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561151653] [2024-06-28 03:15:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:39,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:39,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561151653] [2024-06-28 03:15:39,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561151653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:39,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:39,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:39,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927983757] [2024-06-28 03:15:39,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:39,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:39,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:39,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:39,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:39,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:15:39,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 303 transitions, 3195 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:39,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:39,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:15:39,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:39,856 INFO L124 PetriNetUnfolderBase]: 2617/4147 cut-off events. [2024-06-28 03:15:39,857 INFO L125 PetriNetUnfolderBase]: For 412787/412795 co-relation queries the response was YES. [2024-06-28 03:15:39,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35443 conditions, 4147 events. 2617/4147 cut-off events. For 412787/412795 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23120 event pairs, 674 based on Foata normal form. 6/4152 useless extension candidates. Maximal degree in co-relation 35331. Up to 3831 conditions per place. [2024-06-28 03:15:39,900 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 27 changer transitions 0/327 dead transitions. [2024-06-28 03:15:39,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 327 transitions, 4127 flow [2024-06-28 03:15:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:15:39,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-28 03:15:39,902 INFO L175 Difference]: Start difference. First operand has 227 places, 303 transitions, 3195 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:15:39,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 327 transitions, 4127 flow [2024-06-28 03:15:40,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 327 transitions, 4020 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:40,666 INFO L231 Difference]: Finished difference. Result has 229 places, 310 transitions, 3280 flow [2024-06-28 03:15:40,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3088, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3280, PETRI_PLACES=229, PETRI_TRANSITIONS=310} [2024-06-28 03:15:40,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-28 03:15:40,667 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 310 transitions, 3280 flow [2024-06-28 03:15:40,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:40,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:40,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:40,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:15:40,667 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:40,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:40,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2050431759, now seen corresponding path program 3 times [2024-06-28 03:15:40,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:40,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069433474] [2024-06-28 03:15:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:40,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:41,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:41,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069433474] [2024-06-28 03:15:41,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069433474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:41,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:41,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:41,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153308350] [2024-06-28 03:15:41,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:41,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:41,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:41,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:15:41,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 310 transitions, 3280 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:41,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:41,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:15:41,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:42,435 INFO L124 PetriNetUnfolderBase]: 2662/4211 cut-off events. [2024-06-28 03:15:42,435 INFO L125 PetriNetUnfolderBase]: For 431636/431640 co-relation queries the response was YES. [2024-06-28 03:15:42,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36778 conditions, 4211 events. 2662/4211 cut-off events. For 431636/431640 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23499 event pairs, 681 based on Foata normal form. 5/4213 useless extension candidates. Maximal degree in co-relation 36665. Up to 3790 conditions per place. [2024-06-28 03:15:42,481 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 53 changer transitions 0/333 dead transitions. [2024-06-28 03:15:42,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 333 transitions, 4226 flow [2024-06-28 03:15:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:42,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:15:42,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 03:15:42,483 INFO L175 Difference]: Start difference. First operand has 229 places, 310 transitions, 3280 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:15:42,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 333 transitions, 4226 flow [2024-06-28 03:15:42,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 333 transitions, 4143 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 03:15:42,989 INFO L231 Difference]: Finished difference. Result has 234 places, 316 transitions, 3469 flow [2024-06-28 03:15:42,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3197, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3469, PETRI_PLACES=234, PETRI_TRANSITIONS=316} [2024-06-28 03:15:42,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-28 03:15:42,989 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 316 transitions, 3469 flow [2024-06-28 03:15:42,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:42,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:42,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:42,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:15:42,990 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:42,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1154030335, now seen corresponding path program 4 times [2024-06-28 03:15:42,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:42,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172927951] [2024-06-28 03:15:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:43,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:43,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172927951] [2024-06-28 03:15:43,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172927951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:43,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:43,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:43,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947883741] [2024-06-28 03:15:43,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:43,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:43,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:43,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:43,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:43,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:15:43,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 316 transitions, 3469 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:43,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:43,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:15:43,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:44,706 INFO L124 PetriNetUnfolderBase]: 2752/4340 cut-off events. [2024-06-28 03:15:44,707 INFO L125 PetriNetUnfolderBase]: For 470673/470681 co-relation queries the response was YES. [2024-06-28 03:15:44,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39117 conditions, 4340 events. 2752/4340 cut-off events. For 470673/470681 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24245 event pairs, 699 based on Foata normal form. 11/4350 useless extension candidates. Maximal degree in co-relation 39001. Up to 3917 conditions per place. [2024-06-28 03:15:44,750 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 53 changer transitions 0/344 dead transitions. [2024-06-28 03:15:44,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 344 transitions, 4691 flow [2024-06-28 03:15:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:15:44,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-28 03:15:44,751 INFO L175 Difference]: Start difference. First operand has 234 places, 316 transitions, 3469 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:15:44,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 344 transitions, 4691 flow [2024-06-28 03:15:45,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 344 transitions, 4601 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 03:15:45,586 INFO L231 Difference]: Finished difference. Result has 238 places, 326 transitions, 3719 flow [2024-06-28 03:15:45,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3379, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3719, PETRI_PLACES=238, PETRI_TRANSITIONS=326} [2024-06-28 03:15:45,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-28 03:15:45,587 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 326 transitions, 3719 flow [2024-06-28 03:15:45,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:45,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:45,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:45,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:15:45,588 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:45,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:45,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1161381985, now seen corresponding path program 5 times [2024-06-28 03:15:45,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:45,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048282973] [2024-06-28 03:15:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:45,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:46,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:46,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048282973] [2024-06-28 03:15:46,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048282973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:46,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:46,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:46,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599103337] [2024-06-28 03:15:46,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:46,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:46,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:46,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:15:46,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 326 transitions, 3719 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:46,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:46,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:15:46,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:47,223 INFO L124 PetriNetUnfolderBase]: 2750/4338 cut-off events. [2024-06-28 03:15:47,224 INFO L125 PetriNetUnfolderBase]: For 474011/474019 co-relation queries the response was YES. [2024-06-28 03:15:47,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39536 conditions, 4338 events. 2750/4338 cut-off events. For 474011/474019 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24206 event pairs, 693 based on Foata normal form. 11/4348 useless extension candidates. Maximal degree in co-relation 39418. Up to 4001 conditions per place. [2024-06-28 03:15:47,274 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 32 changer transitions 0/345 dead transitions. [2024-06-28 03:15:47,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 345 transitions, 4661 flow [2024-06-28 03:15:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:47,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:15:47,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 03:15:47,275 INFO L175 Difference]: Start difference. First operand has 238 places, 326 transitions, 3719 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:15:47,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 345 transitions, 4661 flow [2024-06-28 03:15:47,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 345 transitions, 4534 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-28 03:15:47,964 INFO L231 Difference]: Finished difference. Result has 243 places, 330 transitions, 3756 flow [2024-06-28 03:15:47,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3756, PETRI_PLACES=243, PETRI_TRANSITIONS=330} [2024-06-28 03:15:47,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-28 03:15:47,965 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 330 transitions, 3756 flow [2024-06-28 03:15:47,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:47,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:47,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:47,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:15:47,965 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:47,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:47,966 INFO L85 PathProgramCache]: Analyzing trace with hash 604527821, now seen corresponding path program 6 times [2024-06-28 03:15:47,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:47,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112884747] [2024-06-28 03:15:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:47,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:48,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:48,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112884747] [2024-06-28 03:15:48,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112884747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:48,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:48,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:48,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996956829] [2024-06-28 03:15:48,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:48,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:48,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:48,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:15:48,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 330 transitions, 3756 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:48,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:48,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:15:48,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:49,667 INFO L124 PetriNetUnfolderBase]: 2738/4318 cut-off events. [2024-06-28 03:15:49,668 INFO L125 PetriNetUnfolderBase]: For 468582/468590 co-relation queries the response was YES. [2024-06-28 03:15:49,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39106 conditions, 4318 events. 2738/4318 cut-off events. For 468582/468590 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24069 event pairs, 690 based on Foata normal form. 5/4318 useless extension candidates. Maximal degree in co-relation 38986. Up to 3950 conditions per place. [2024-06-28 03:15:49,720 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 280 selfloop transitions, 47 changer transitions 0/346 dead transitions. [2024-06-28 03:15:49,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 346 transitions, 4524 flow [2024-06-28 03:15:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:15:49,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 03:15:49,722 INFO L175 Difference]: Start difference. First operand has 243 places, 330 transitions, 3756 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:15:49,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 346 transitions, 4524 flow [2024-06-28 03:15:50,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 346 transitions, 4366 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:50,453 INFO L231 Difference]: Finished difference. Result has 245 places, 333 transitions, 3778 flow [2024-06-28 03:15:50,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3778, PETRI_PLACES=245, PETRI_TRANSITIONS=333} [2024-06-28 03:15:50,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-28 03:15:50,453 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 333 transitions, 3778 flow [2024-06-28 03:15:50,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:50,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:50,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:50,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:15:50,454 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:50,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash 612162098, now seen corresponding path program 1 times [2024-06-28 03:15:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:50,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772632252] [2024-06-28 03:15:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:50,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:51,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772632252] [2024-06-28 03:15:51,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772632252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:51,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:51,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:15:51,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472217426] [2024-06-28 03:15:51,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:51,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:15:51,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:51,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:15:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:15:51,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:51,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 333 transitions, 3778 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:51,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:51,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:51,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:52,572 INFO L124 PetriNetUnfolderBase]: 2848/4429 cut-off events. [2024-06-28 03:15:52,573 INFO L125 PetriNetUnfolderBase]: For 471376/471380 co-relation queries the response was YES. [2024-06-28 03:15:52,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39842 conditions, 4429 events. 2848/4429 cut-off events. For 471376/471380 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24213 event pairs, 730 based on Foata normal form. 3/4431 useless extension candidates. Maximal degree in co-relation 39721. Up to 4280 conditions per place. [2024-06-28 03:15:52,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 323 selfloop transitions, 20 changer transitions 0/347 dead transitions. [2024-06-28 03:15:52,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 347 transitions, 4584 flow [2024-06-28 03:15:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:15:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:15:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-28 03:15:52,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34959349593495936 [2024-06-28 03:15:52,633 INFO L175 Difference]: Start difference. First operand has 245 places, 333 transitions, 3778 flow. Second operand 9 states and 129 transitions. [2024-06-28 03:15:52,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 347 transitions, 4584 flow [2024-06-28 03:15:53,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 347 transitions, 4426 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:53,282 INFO L231 Difference]: Finished difference. Result has 248 places, 335 transitions, 3757 flow [2024-06-28 03:15:53,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3620, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3757, PETRI_PLACES=248, PETRI_TRANSITIONS=335} [2024-06-28 03:15:53,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-28 03:15:53,283 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 335 transitions, 3757 flow [2024-06-28 03:15:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:53,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:53,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:53,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:15:53,284 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:53,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:53,284 INFO L85 PathProgramCache]: Analyzing trace with hash -56834200, now seen corresponding path program 1 times [2024-06-28 03:15:53,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:53,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588057347] [2024-06-28 03:15:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:53,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:53,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:53,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588057347] [2024-06-28 03:15:53,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588057347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:53,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:53,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:53,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110209910] [2024-06-28 03:15:53,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:53,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:53,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:53,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:53,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:53,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:53,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 335 transitions, 3757 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:53,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:53,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:53,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:54,801 INFO L124 PetriNetUnfolderBase]: 2864/4456 cut-off events. [2024-06-28 03:15:54,802 INFO L125 PetriNetUnfolderBase]: For 488654/488664 co-relation queries the response was YES. [2024-06-28 03:15:54,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40132 conditions, 4456 events. 2864/4456 cut-off events. For 488654/488664 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 24414 event pairs, 519 based on Foata normal form. 14/4469 useless extension candidates. Maximal degree in co-relation 40010. Up to 4107 conditions per place. [2024-06-28 03:15:54,849 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 42 changer transitions 0/367 dead transitions. [2024-06-28 03:15:54,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 367 transitions, 4691 flow [2024-06-28 03:15:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:15:54,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 03:15:54,851 INFO L175 Difference]: Start difference. First operand has 248 places, 335 transitions, 3757 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:15:54,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 367 transitions, 4691 flow [2024-06-28 03:15:55,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 367 transitions, 4562 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-28 03:15:55,779 INFO L231 Difference]: Finished difference. Result has 249 places, 338 transitions, 3826 flow [2024-06-28 03:15:55,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3826, PETRI_PLACES=249, PETRI_TRANSITIONS=338} [2024-06-28 03:15:55,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-28 03:15:55,780 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 338 transitions, 3826 flow [2024-06-28 03:15:55,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:55,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:55,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:55,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:15:55,781 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:55,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:55,781 INFO L85 PathProgramCache]: Analyzing trace with hash -56595190, now seen corresponding path program 2 times [2024-06-28 03:15:55,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:55,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493946536] [2024-06-28 03:15:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:55,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:56,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:56,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:56,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493946536] [2024-06-28 03:15:56,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493946536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:56,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:56,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:15:56,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554190678] [2024-06-28 03:15:56,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:56,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:15:56,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:56,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:15:56,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:15:56,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:56,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 338 transitions, 3826 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:56,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:56,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:56,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:15:57,359 INFO L124 PetriNetUnfolderBase]: 2880/4480 cut-off events. [2024-06-28 03:15:57,359 INFO L125 PetriNetUnfolderBase]: For 502327/502337 co-relation queries the response was YES. [2024-06-28 03:15:57,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40816 conditions, 4480 events. 2880/4480 cut-off events. For 502327/502337 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24598 event pairs, 673 based on Foata normal form. 14/4493 useless extension candidates. Maximal degree in co-relation 40693. Up to 4184 conditions per place. [2024-06-28 03:15:57,409 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 319 selfloop transitions, 43 changer transitions 0/366 dead transitions. [2024-06-28 03:15:57,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 366 transitions, 4750 flow [2024-06-28 03:15:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:15:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:15:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:15:57,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-28 03:15:57,411 INFO L175 Difference]: Start difference. First operand has 249 places, 338 transitions, 3826 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:15:57,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 366 transitions, 4750 flow [2024-06-28 03:15:58,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 366 transitions, 4574 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 03:15:58,308 INFO L231 Difference]: Finished difference. Result has 251 places, 341 transitions, 3856 flow [2024-06-28 03:15:58,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3650, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3856, PETRI_PLACES=251, PETRI_TRANSITIONS=341} [2024-06-28 03:15:58,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-28 03:15:58,308 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 341 transitions, 3856 flow [2024-06-28 03:15:58,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:15:58,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:15:58,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:15:58,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:15:58,309 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:15:58,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:15:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash -443535028, now seen corresponding path program 1 times [2024-06-28 03:15:58,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:15:58,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251648598] [2024-06-28 03:15:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:15:58,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:15:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:15:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:15:59,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:15:59,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251648598] [2024-06-28 03:15:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251648598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:15:59,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:15:59,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:15:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171704199] [2024-06-28 03:15:59,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:15:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:15:59,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:15:59,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:15:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:15:59,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:15:59,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 341 transitions, 3856 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:15:59,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:15:59,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:15:59,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:00,119 INFO L124 PetriNetUnfolderBase]: 2890/4496 cut-off events. [2024-06-28 03:16:00,119 INFO L125 PetriNetUnfolderBase]: For 510633/510643 co-relation queries the response was YES. [2024-06-28 03:16:00,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41131 conditions, 4496 events. 2890/4496 cut-off events. For 510633/510643 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24714 event pairs, 672 based on Foata normal form. 12/4507 useless extension candidates. Maximal degree in co-relation 41007. Up to 4198 conditions per place. [2024-06-28 03:16:00,180 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 318 selfloop transitions, 48 changer transitions 0/370 dead transitions. [2024-06-28 03:16:00,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 370 transitions, 4804 flow [2024-06-28 03:16:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 03:16:00,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-28 03:16:00,181 INFO L175 Difference]: Start difference. First operand has 251 places, 341 transitions, 3856 flow. Second operand 9 states and 148 transitions. [2024-06-28 03:16:00,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 370 transitions, 4804 flow [2024-06-28 03:16:00,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 370 transitions, 4620 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:00,841 INFO L231 Difference]: Finished difference. Result has 254 places, 345 transitions, 3907 flow [2024-06-28 03:16:00,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3672, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3907, PETRI_PLACES=254, PETRI_TRANSITIONS=345} [2024-06-28 03:16:00,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-28 03:16:00,844 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 345 transitions, 3907 flow [2024-06-28 03:16:00,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:00,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:00,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:00,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:16:00,845 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:00,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash 897773634, now seen corresponding path program 1 times [2024-06-28 03:16:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:00,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541746529] [2024-06-28 03:16:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:00,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:01,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:01,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541746529] [2024-06-28 03:16:01,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541746529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:01,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:01,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:01,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903404541] [2024-06-28 03:16:01,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:01,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:01,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:01,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:01,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 345 transitions, 3907 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:01,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:01,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:01,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:02,517 INFO L124 PetriNetUnfolderBase]: 3001/4661 cut-off events. [2024-06-28 03:16:02,517 INFO L125 PetriNetUnfolderBase]: For 529660/529668 co-relation queries the response was YES. [2024-06-28 03:16:02,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42618 conditions, 4661 events. 3001/4661 cut-off events. For 529660/529668 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25650 event pairs, 632 based on Foata normal form. 8/4668 useless extension candidates. Maximal degree in co-relation 42493. Up to 3961 conditions per place. [2024-06-28 03:16:02,580 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 289 selfloop transitions, 109 changer transitions 0/402 dead transitions. [2024-06-28 03:16:02,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 402 transitions, 5220 flow [2024-06-28 03:16:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:16:02,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 03:16:02,582 INFO L175 Difference]: Start difference. First operand has 254 places, 345 transitions, 3907 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:16:02,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 402 transitions, 5220 flow [2024-06-28 03:16:03,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 402 transitions, 4991 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:03,480 INFO L231 Difference]: Finished difference. Result has 259 places, 377 transitions, 4428 flow [2024-06-28 03:16:03,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4428, PETRI_PLACES=259, PETRI_TRANSITIONS=377} [2024-06-28 03:16:03,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-28 03:16:03,481 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 377 transitions, 4428 flow [2024-06-28 03:16:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:03,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:03,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:03,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:16:03,481 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:03,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1195941788, now seen corresponding path program 1 times [2024-06-28 03:16:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:03,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772922965] [2024-06-28 03:16:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:03,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:04,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:04,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772922965] [2024-06-28 03:16:04,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772922965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:04,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:04,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:04,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168094559] [2024-06-28 03:16:04,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:04,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:04,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:04,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 377 transitions, 4428 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:04,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:04,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:04,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:05,210 INFO L124 PetriNetUnfolderBase]: 3011/4671 cut-off events. [2024-06-28 03:16:05,211 INFO L125 PetriNetUnfolderBase]: For 540319/540325 co-relation queries the response was YES. [2024-06-28 03:16:05,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44194 conditions, 4671 events. 3011/4671 cut-off events. For 540319/540325 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25723 event pairs, 586 based on Foata normal form. 6/4676 useless extension candidates. Maximal degree in co-relation 44065. Up to 4346 conditions per place. [2024-06-28 03:16:05,265 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 53 changer transitions 0/402 dead transitions. [2024-06-28 03:16:05,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 402 transitions, 5378 flow [2024-06-28 03:16:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:05,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:16:05,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 03:16:05,266 INFO L175 Difference]: Start difference. First operand has 259 places, 377 transitions, 4428 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:16:05,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 402 transitions, 5378 flow [2024-06-28 03:16:06,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 402 transitions, 5192 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-28 03:16:06,232 INFO L231 Difference]: Finished difference. Result has 264 places, 381 transitions, 4441 flow [2024-06-28 03:16:06,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4441, PETRI_PLACES=264, PETRI_TRANSITIONS=381} [2024-06-28 03:16:06,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-28 03:16:06,233 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 381 transitions, 4441 flow [2024-06-28 03:16:06,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:06,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:06,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:06,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:16:06,233 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:06,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:06,234 INFO L85 PathProgramCache]: Analyzing trace with hash 61615622, now seen corresponding path program 2 times [2024-06-28 03:16:06,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:06,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550674875] [2024-06-28 03:16:06,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:06,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:06,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:06,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550674875] [2024-06-28 03:16:06,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550674875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:06,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:06,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:06,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097877024] [2024-06-28 03:16:06,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:06,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:06,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:06,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:06,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:06,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:06,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 381 transitions, 4441 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:06,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:06,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:06,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:08,036 INFO L124 PetriNetUnfolderBase]: 3063/4736 cut-off events. [2024-06-28 03:16:08,036 INFO L125 PetriNetUnfolderBase]: For 575852/575858 co-relation queries the response was YES. [2024-06-28 03:16:08,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45108 conditions, 4736 events. 3063/4736 cut-off events. For 575852/575858 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25997 event pairs, 611 based on Foata normal form. 4/4739 useless extension candidates. Maximal degree in co-relation 44978. Up to 3983 conditions per place. [2024-06-28 03:16:08,086 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 121 changer transitions 0/413 dead transitions. [2024-06-28 03:16:08,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 413 transitions, 5729 flow [2024-06-28 03:16:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:16:08,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-28 03:16:08,087 INFO L175 Difference]: Start difference. First operand has 264 places, 381 transitions, 4441 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:16:08,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 413 transitions, 5729 flow [2024-06-28 03:16:08,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 413 transitions, 5580 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:08,871 INFO L231 Difference]: Finished difference. Result has 266 places, 389 transitions, 4773 flow [2024-06-28 03:16:08,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4773, PETRI_PLACES=266, PETRI_TRANSITIONS=389} [2024-06-28 03:16:08,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-28 03:16:08,872 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 389 transitions, 4773 flow [2024-06-28 03:16:08,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:08,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:08,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:08,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:16:08,873 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:08,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:08,873 INFO L85 PathProgramCache]: Analyzing trace with hash 238984478, now seen corresponding path program 2 times [2024-06-28 03:16:08,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:08,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180037934] [2024-06-28 03:16:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:08,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:09,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:09,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180037934] [2024-06-28 03:16:09,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180037934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:09,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:09,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:09,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619450505] [2024-06-28 03:16:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:09,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:09,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:09,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:09,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:09,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 389 transitions, 4773 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:09,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:09,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:09,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:10,561 INFO L124 PetriNetUnfolderBase]: 3073/4751 cut-off events. [2024-06-28 03:16:10,561 INFO L125 PetriNetUnfolderBase]: For 589710/589716 co-relation queries the response was YES. [2024-06-28 03:16:10,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46197 conditions, 4751 events. 3073/4751 cut-off events. For 589710/589716 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26159 event pairs, 605 based on Foata normal form. 6/4756 useless extension candidates. Maximal degree in co-relation 46066. Up to 4342 conditions per place. [2024-06-28 03:16:10,622 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 332 selfloop transitions, 75 changer transitions 0/411 dead transitions. [2024-06-28 03:16:10,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 411 transitions, 5891 flow [2024-06-28 03:16:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:10,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:16:10,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 03:16:10,624 INFO L175 Difference]: Start difference. First operand has 266 places, 389 transitions, 4773 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:16:10,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 411 transitions, 5891 flow [2024-06-28 03:16:11,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 411 transitions, 5628 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:11,768 INFO L231 Difference]: Finished difference. Result has 270 places, 393 transitions, 4758 flow [2024-06-28 03:16:11,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4758, PETRI_PLACES=270, PETRI_TRANSITIONS=393} [2024-06-28 03:16:11,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-28 03:16:11,769 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 393 transitions, 4758 flow [2024-06-28 03:16:11,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:11,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:11,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:11,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:16:11,769 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:11,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash 238747328, now seen corresponding path program 3 times [2024-06-28 03:16:11,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:11,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973489439] [2024-06-28 03:16:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:11,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:12,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:12,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973489439] [2024-06-28 03:16:12,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973489439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:12,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:12,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635352406] [2024-06-28 03:16:12,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:12,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:12,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:12,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:12,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:12,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:12,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 393 transitions, 4758 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:12,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:12,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:12,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:13,665 INFO L124 PetriNetUnfolderBase]: 3075/4760 cut-off events. [2024-06-28 03:16:13,666 INFO L125 PetriNetUnfolderBase]: For 596613/596619 co-relation queries the response was YES. [2024-06-28 03:16:13,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46189 conditions, 4760 events. 3075/4760 cut-off events. For 596613/596619 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26239 event pairs, 595 based on Foata normal form. 6/4765 useless extension candidates. Maximal degree in co-relation 46056. Up to 4391 conditions per place. [2024-06-28 03:16:13,730 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 350 selfloop transitions, 59 changer transitions 0/413 dead transitions. [2024-06-28 03:16:13,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 413 transitions, 5710 flow [2024-06-28 03:16:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:16:13,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-28 03:16:13,731 INFO L175 Difference]: Start difference. First operand has 270 places, 393 transitions, 4758 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:16:13,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 413 transitions, 5710 flow [2024-06-28 03:16:14,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 413 transitions, 5537 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 03:16:14,664 INFO L231 Difference]: Finished difference. Result has 273 places, 396 transitions, 4792 flow [2024-06-28 03:16:14,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4587, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4792, PETRI_PLACES=273, PETRI_TRANSITIONS=396} [2024-06-28 03:16:14,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-28 03:16:14,664 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 396 transitions, 4792 flow [2024-06-28 03:16:14,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:14,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:14,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:14,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:16:14,665 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:14,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:14,665 INFO L85 PathProgramCache]: Analyzing trace with hash 238747142, now seen corresponding path program 3 times [2024-06-28 03:16:14,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:14,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006105276] [2024-06-28 03:16:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:14,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:15,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:15,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006105276] [2024-06-28 03:16:15,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006105276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:15,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:15,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:15,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32009543] [2024-06-28 03:16:15,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:15,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:15,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:15,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 396 transitions, 4792 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:15,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:15,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:15,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:16,338 INFO L124 PetriNetUnfolderBase]: 3208/4959 cut-off events. [2024-06-28 03:16:16,338 INFO L125 PetriNetUnfolderBase]: For 638568/638574 co-relation queries the response was YES. [2024-06-28 03:16:16,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48469 conditions, 4959 events. 3208/4959 cut-off events. For 638568/638574 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27379 event pairs, 657 based on Foata normal form. 6/4964 useless extension candidates. Maximal degree in co-relation 48335. Up to 4076 conditions per place. [2024-06-28 03:16:16,401 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 325 selfloop transitions, 123 changer transitions 0/452 dead transitions. [2024-06-28 03:16:16,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 452 transitions, 6524 flow [2024-06-28 03:16:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 03:16:16,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-28 03:16:16,402 INFO L175 Difference]: Start difference. First operand has 273 places, 396 transitions, 4792 flow. Second operand 9 states and 149 transitions. [2024-06-28 03:16:16,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 452 transitions, 6524 flow [2024-06-28 03:16:17,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 452 transitions, 6318 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:17,704 INFO L231 Difference]: Finished difference. Result has 278 places, 423 transitions, 5403 flow [2024-06-28 03:16:17,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5403, PETRI_PLACES=278, PETRI_TRANSITIONS=423} [2024-06-28 03:16:17,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-28 03:16:17,705 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 423 transitions, 5403 flow [2024-06-28 03:16:17,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:17,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:17,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:17,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:16:17,706 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:17,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:17,706 INFO L85 PathProgramCache]: Analyzing trace with hash 238624010, now seen corresponding path program 3 times [2024-06-28 03:16:17,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:17,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483420216] [2024-06-28 03:16:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:18,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:18,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483420216] [2024-06-28 03:16:18,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483420216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:18,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:18,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:18,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939209056] [2024-06-28 03:16:18,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:18,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:18,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:18,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:18,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 423 transitions, 5403 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:18,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:18,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:18,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:19,448 INFO L124 PetriNetUnfolderBase]: 3224/4977 cut-off events. [2024-06-28 03:16:19,449 INFO L125 PetriNetUnfolderBase]: For 661726/661732 co-relation queries the response was YES. [2024-06-28 03:16:19,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49867 conditions, 4977 events. 3224/4977 cut-off events. For 661726/661732 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27566 event pairs, 601 based on Foata normal form. 8/4984 useless extension candidates. Maximal degree in co-relation 49730. Up to 4569 conditions per place. [2024-06-28 03:16:19,523 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 369 selfloop transitions, 71 changer transitions 0/444 dead transitions. [2024-06-28 03:16:19,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 444 transitions, 6467 flow [2024-06-28 03:16:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:16:19,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-28 03:16:19,525 INFO L175 Difference]: Start difference. First operand has 278 places, 423 transitions, 5403 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:16:19,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 444 transitions, 6467 flow [2024-06-28 03:16:20,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 444 transitions, 6236 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:20,634 INFO L231 Difference]: Finished difference. Result has 282 places, 426 transitions, 5451 flow [2024-06-28 03:16:20,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5172, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5451, PETRI_PLACES=282, PETRI_TRANSITIONS=426} [2024-06-28 03:16:20,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-28 03:16:20,634 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 426 transitions, 5451 flow [2024-06-28 03:16:20,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:20,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:20,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:20,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:16:20,635 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:20,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash 238634922, now seen corresponding path program 2 times [2024-06-28 03:16:20,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:20,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007604997] [2024-06-28 03:16:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:20,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:21,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:21,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007604997] [2024-06-28 03:16:21,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007604997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:21,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:21,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:21,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390370793] [2024-06-28 03:16:21,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:21,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:21,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:21,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:21,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:21,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:21,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 426 transitions, 5451 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:21,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:21,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:21,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:22,781 INFO L124 PetriNetUnfolderBase]: 3234/4991 cut-off events. [2024-06-28 03:16:22,781 INFO L125 PetriNetUnfolderBase]: For 668619/668625 co-relation queries the response was YES. [2024-06-28 03:16:22,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50377 conditions, 4991 events. 3234/4991 cut-off events. For 668619/668625 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27627 event pairs, 601 based on Foata normal form. 6/4996 useless extension candidates. Maximal degree in co-relation 50238. Up to 4583 conditions per place. [2024-06-28 03:16:22,850 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 368 selfloop transitions, 76 changer transitions 0/448 dead transitions. [2024-06-28 03:16:22,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 448 transitions, 6541 flow [2024-06-28 03:16:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 03:16:22,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-28 03:16:22,852 INFO L175 Difference]: Start difference. First operand has 282 places, 426 transitions, 5451 flow. Second operand 9 states and 143 transitions. [2024-06-28 03:16:22,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 448 transitions, 6541 flow [2024-06-28 03:16:24,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 448 transitions, 6286 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:24,123 INFO L231 Difference]: Finished difference. Result has 285 places, 430 transitions, 5505 flow [2024-06-28 03:16:24,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5505, PETRI_PLACES=285, PETRI_TRANSITIONS=430} [2024-06-28 03:16:24,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-28 03:16:24,124 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 430 transitions, 5505 flow [2024-06-28 03:16:24,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:24,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:24,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:24,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:16:24,125 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:24,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:24,125 INFO L85 PathProgramCache]: Analyzing trace with hash 238980882, now seen corresponding path program 3 times [2024-06-28 03:16:24,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:24,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784405678] [2024-06-28 03:16:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:25,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:25,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784405678] [2024-06-28 03:16:25,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784405678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:25,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:25,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:25,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724786455] [2024-06-28 03:16:25,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:25,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:25,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:25,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:25,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 430 transitions, 5505 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:25,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:25,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:25,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:26,302 INFO L124 PetriNetUnfolderBase]: 3278/5060 cut-off events. [2024-06-28 03:16:26,302 INFO L125 PetriNetUnfolderBase]: For 698868/698874 co-relation queries the response was YES. [2024-06-28 03:16:26,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51913 conditions, 5060 events. 3278/5060 cut-off events. For 698868/698874 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28107 event pairs, 603 based on Foata normal form. 6/5065 useless extension candidates. Maximal degree in co-relation 51773. Up to 4527 conditions per place. [2024-06-28 03:16:26,370 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 357 selfloop transitions, 101 changer transitions 0/462 dead transitions. [2024-06-28 03:16:26,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 462 transitions, 7253 flow [2024-06-28 03:16:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 03:16:26,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-28 03:16:26,371 INFO L175 Difference]: Start difference. First operand has 285 places, 430 transitions, 5505 flow. Second operand 9 states and 148 transitions. [2024-06-28 03:16:26,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 462 transitions, 7253 flow [2024-06-28 03:16:27,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 462 transitions, 6972 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:27,666 INFO L231 Difference]: Finished difference. Result has 288 places, 442 transitions, 5917 flow [2024-06-28 03:16:27,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5224, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5917, PETRI_PLACES=288, PETRI_TRANSITIONS=442} [2024-06-28 03:16:27,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-28 03:16:27,667 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 442 transitions, 5917 flow [2024-06-28 03:16:27,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:27,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:27,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:27,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:16:27,668 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:27,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:27,668 INFO L85 PathProgramCache]: Analyzing trace with hash 238992972, now seen corresponding path program 4 times [2024-06-28 03:16:27,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:27,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078729245] [2024-06-28 03:16:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:27,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:28,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:28,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078729245] [2024-06-28 03:16:28,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078729245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:28,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:28,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:28,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758468023] [2024-06-28 03:16:28,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:28,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:28,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:28,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:28,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:28,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 442 transitions, 5917 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:28,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:28,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:28,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:29,674 INFO L124 PetriNetUnfolderBase]: 3320/5128 cut-off events. [2024-06-28 03:16:29,674 INFO L125 PetriNetUnfolderBase]: For 739217/739223 co-relation queries the response was YES. [2024-06-28 03:16:29,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53715 conditions, 5128 events. 3320/5128 cut-off events. For 739217/739223 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28650 event pairs, 605 based on Foata normal form. 8/5135 useless extension candidates. Maximal degree in co-relation 53573. Up to 4538 conditions per place. [2024-06-28 03:16:29,742 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 364 selfloop transitions, 103 changer transitions 0/471 dead transitions. [2024-06-28 03:16:29,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 471 transitions, 7601 flow [2024-06-28 03:16:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 03:16:29,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-28 03:16:29,743 INFO L175 Difference]: Start difference. First operand has 288 places, 442 transitions, 5917 flow. Second operand 9 states and 149 transitions. [2024-06-28 03:16:29,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 471 transitions, 7601 flow [2024-06-28 03:16:31,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 471 transitions, 7213 flow, removed 155 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:31,157 INFO L231 Difference]: Finished difference. Result has 294 places, 450 transitions, 6063 flow [2024-06-28 03:16:31,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6063, PETRI_PLACES=294, PETRI_TRANSITIONS=450} [2024-06-28 03:16:31,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-28 03:16:31,158 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 450 transitions, 6063 flow [2024-06-28 03:16:31,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:31,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:31,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:31,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:16:31,158 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:31,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash -160873446, now seen corresponding path program 1 times [2024-06-28 03:16:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:31,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187758961] [2024-06-28 03:16:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:32,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:32,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187758961] [2024-06-28 03:16:32,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187758961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:32,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:32,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:32,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114219250] [2024-06-28 03:16:32,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:32,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:32,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:32,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:32,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 450 transitions, 6063 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:32,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:32,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:32,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:33,386 INFO L124 PetriNetUnfolderBase]: 3315/5125 cut-off events. [2024-06-28 03:16:33,387 INFO L125 PetriNetUnfolderBase]: For 738787/738793 co-relation queries the response was YES. [2024-06-28 03:16:33,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54015 conditions, 5125 events. 3315/5125 cut-off events. For 738787/738793 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28584 event pairs, 618 based on Foata normal form. 7/5131 useless extension candidates. Maximal degree in co-relation 53870. Up to 4916 conditions per place. [2024-06-28 03:16:33,452 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 440 selfloop transitions, 26 changer transitions 0/470 dead transitions. [2024-06-28 03:16:33,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 470 transitions, 7191 flow [2024-06-28 03:16:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 03:16:33,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-28 03:16:33,453 INFO L175 Difference]: Start difference. First operand has 294 places, 450 transitions, 6063 flow. Second operand 8 states and 124 transitions. [2024-06-28 03:16:33,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 470 transitions, 7191 flow [2024-06-28 03:16:34,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 470 transitions, 6838 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:34,907 INFO L231 Difference]: Finished difference. Result has 296 places, 453 transitions, 5911 flow [2024-06-28 03:16:34,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5911, PETRI_PLACES=296, PETRI_TRANSITIONS=453} [2024-06-28 03:16:34,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-28 03:16:34,908 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 453 transitions, 5911 flow [2024-06-28 03:16:34,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:34,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:34,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:34,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:16:34,908 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:34,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:34,908 INFO L85 PathProgramCache]: Analyzing trace with hash 471978550, now seen corresponding path program 4 times [2024-06-28 03:16:34,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:34,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708611089] [2024-06-28 03:16:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:34,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:35,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:35,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708611089] [2024-06-28 03:16:35,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708611089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:35,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:35,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:35,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490026584] [2024-06-28 03:16:35,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:35,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:35,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:35,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:35,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:35,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 453 transitions, 5911 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:35,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:35,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:35,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:36,908 INFO L124 PetriNetUnfolderBase]: 3325/5109 cut-off events. [2024-06-28 03:16:36,908 INFO L125 PetriNetUnfolderBase]: For 756617/756619 co-relation queries the response was YES. [2024-06-28 03:16:36,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53999 conditions, 5109 events. 3325/5109 cut-off events. For 756617/756619 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28167 event pairs, 628 based on Foata normal form. 4/5104 useless extension candidates. Maximal degree in co-relation 53853. Up to 4426 conditions per place. [2024-06-28 03:16:36,974 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 364 selfloop transitions, 117 changer transitions 0/485 dead transitions. [2024-06-28 03:16:36,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 485 transitions, 7111 flow [2024-06-28 03:16:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:16:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:16:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 03:16:36,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-28 03:16:36,975 INFO L175 Difference]: Start difference. First operand has 296 places, 453 transitions, 5911 flow. Second operand 9 states and 149 transitions. [2024-06-28 03:16:36,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 485 transitions, 7111 flow [2024-06-28 03:16:38,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 485 transitions, 6973 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:38,622 INFO L231 Difference]: Finished difference. Result has 300 places, 460 transitions, 6163 flow [2024-06-28 03:16:38,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6163, PETRI_PLACES=300, PETRI_TRANSITIONS=460} [2024-06-28 03:16:38,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-28 03:16:38,623 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 460 transitions, 6163 flow [2024-06-28 03:16:38,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:38,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:38,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:38,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:16:38,624 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:38,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:38,624 INFO L85 PathProgramCache]: Analyzing trace with hash -987856320, now seen corresponding path program 5 times [2024-06-28 03:16:38,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:38,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119732729] [2024-06-28 03:16:38,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:38,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:39,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:39,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119732729] [2024-06-28 03:16:39,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119732729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:39,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:39,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701684389] [2024-06-28 03:16:39,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:39,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:39,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:39,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:39,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 460 transitions, 6163 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:39,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:39,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:39,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:40,552 INFO L124 PetriNetUnfolderBase]: 3335/5122 cut-off events. [2024-06-28 03:16:40,553 INFO L125 PetriNetUnfolderBase]: For 777069/777073 co-relation queries the response was YES. [2024-06-28 03:16:40,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55203 conditions, 5122 events. 3335/5122 cut-off events. For 777069/777073 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 28329 event pairs, 623 based on Foata normal form. 2/5114 useless extension candidates. Maximal degree in co-relation 55055. Up to 4440 conditions per place. [2024-06-28 03:16:40,613 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 364 selfloop transitions, 127 changer transitions 0/495 dead transitions. [2024-06-28 03:16:40,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 495 transitions, 7440 flow [2024-06-28 03:16:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:40,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:16:40,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-28 03:16:40,615 INFO L175 Difference]: Start difference. First operand has 300 places, 460 transitions, 6163 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:16:40,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 495 transitions, 7440 flow [2024-06-28 03:16:42,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 495 transitions, 7198 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:42,141 INFO L231 Difference]: Finished difference. Result has 306 places, 471 transitions, 6427 flow [2024-06-28 03:16:42,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6427, PETRI_PLACES=306, PETRI_TRANSITIONS=471} [2024-06-28 03:16:42,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-28 03:16:42,142 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 471 transitions, 6427 flow [2024-06-28 03:16:42,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:42,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:42,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:42,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:16:42,142 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:42,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:42,142 INFO L85 PathProgramCache]: Analyzing trace with hash -976428480, now seen corresponding path program 6 times [2024-06-28 03:16:42,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:42,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989575552] [2024-06-28 03:16:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:42,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:42,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:42,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989575552] [2024-06-28 03:16:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989575552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:42,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:42,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93311310] [2024-06-28 03:16:42,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:42,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:42,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:42,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 471 transitions, 6427 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:42,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:42,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:42,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:44,186 INFO L124 PetriNetUnfolderBase]: 3361/5158 cut-off events. [2024-06-28 03:16:44,187 INFO L125 PetriNetUnfolderBase]: For 806675/806679 co-relation queries the response was YES. [2024-06-28 03:16:44,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56884 conditions, 5158 events. 3361/5158 cut-off events. For 806675/806679 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28545 event pairs, 622 based on Foata normal form. 2/5150 useless extension candidates. Maximal degree in co-relation 56733. Up to 4404 conditions per place. [2024-06-28 03:16:44,260 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 353 selfloop transitions, 144 changer transitions 0/501 dead transitions. [2024-06-28 03:16:44,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 501 transitions, 7915 flow [2024-06-28 03:16:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:16:44,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 03:16:44,261 INFO L175 Difference]: Start difference. First operand has 306 places, 471 transitions, 6427 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:16:44,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 501 transitions, 7915 flow [2024-06-28 03:16:46,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 501 transitions, 7672 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-28 03:16:46,179 INFO L231 Difference]: Finished difference. Result has 312 places, 478 transitions, 6732 flow [2024-06-28 03:16:46,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6184, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6732, PETRI_PLACES=312, PETRI_TRANSITIONS=478} [2024-06-28 03:16:46,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-28 03:16:46,180 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 478 transitions, 6732 flow [2024-06-28 03:16:46,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:46,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:46,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:46,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:16:46,181 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:46,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash 472098706, now seen corresponding path program 4 times [2024-06-28 03:16:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:46,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220090972] [2024-06-28 03:16:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:46,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:46,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:46,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220090972] [2024-06-28 03:16:46,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220090972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:46,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:46,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453124199] [2024-06-28 03:16:46,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:46,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:46,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:46,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 478 transitions, 6732 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:46,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:46,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:46,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:48,193 INFO L124 PetriNetUnfolderBase]: 3354/5166 cut-off events. [2024-06-28 03:16:48,193 INFO L125 PetriNetUnfolderBase]: For 816054/816058 co-relation queries the response was YES. [2024-06-28 03:16:48,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57393 conditions, 5166 events. 3354/5166 cut-off events. For 816054/816058 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28676 event pairs, 601 based on Foata normal form. 1/5163 useless extension candidates. Maximal degree in co-relation 57240. Up to 4841 conditions per place. [2024-06-28 03:16:48,271 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 442 selfloop transitions, 51 changer transitions 0/497 dead transitions. [2024-06-28 03:16:48,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 497 transitions, 7788 flow [2024-06-28 03:16:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:16:48,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:16:48,273 INFO L175 Difference]: Start difference. First operand has 312 places, 478 transitions, 6732 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:16:48,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 497 transitions, 7788 flow [2024-06-28 03:16:50,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 497 transitions, 7390 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-28 03:16:50,335 INFO L231 Difference]: Finished difference. Result has 315 places, 478 transitions, 6442 flow [2024-06-28 03:16:50,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6334, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6442, PETRI_PLACES=315, PETRI_TRANSITIONS=478} [2024-06-28 03:16:50,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-28 03:16:50,335 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 478 transitions, 6442 flow [2024-06-28 03:16:50,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:50,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:50,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:50,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:16:50,336 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:50,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:50,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1513685498, now seen corresponding path program 7 times [2024-06-28 03:16:50,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:50,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292963747] [2024-06-28 03:16:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:50,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:51,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:51,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292963747] [2024-06-28 03:16:51,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292963747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:51,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:51,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:51,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746530218] [2024-06-28 03:16:51,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:51,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:51,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:51,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:51,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:51,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:51,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 478 transitions, 6442 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:51,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:51,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:51,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:52,283 INFO L124 PetriNetUnfolderBase]: 3356/5151 cut-off events. [2024-06-28 03:16:52,283 INFO L125 PetriNetUnfolderBase]: For 829470/829474 co-relation queries the response was YES. [2024-06-28 03:16:52,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56064 conditions, 5151 events. 3356/5151 cut-off events. For 829470/829474 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28463 event pairs, 640 based on Foata normal form. 2/5143 useless extension candidates. Maximal degree in co-relation 55910. Up to 4440 conditions per place. [2024-06-28 03:16:52,357 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 370 selfloop transitions, 131 changer transitions 0/505 dead transitions. [2024-06-28 03:16:52,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 505 transitions, 7924 flow [2024-06-28 03:16:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:16:52,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 03:16:52,358 INFO L175 Difference]: Start difference. First operand has 315 places, 478 transitions, 6442 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:16:52,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 505 transitions, 7924 flow [2024-06-28 03:16:53,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 505 transitions, 7727 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-28 03:16:53,901 INFO L231 Difference]: Finished difference. Result has 315 places, 484 transitions, 6739 flow [2024-06-28 03:16:53,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6739, PETRI_PLACES=315, PETRI_TRANSITIONS=484} [2024-06-28 03:16:53,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-28 03:16:53,902 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 484 transitions, 6739 flow [2024-06-28 03:16:53,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:53,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:53,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:53,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:16:53,903 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:53,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:53,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1159006562, now seen corresponding path program 5 times [2024-06-28 03:16:53,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:53,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733405653] [2024-06-28 03:16:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:53,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:54,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:54,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733405653] [2024-06-28 03:16:54,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733405653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:54,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:54,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744855524] [2024-06-28 03:16:54,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:54,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:54,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:54,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:54,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:54,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 484 transitions, 6739 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:54,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:54,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:54,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:55,890 INFO L124 PetriNetUnfolderBase]: 3369/5185 cut-off events. [2024-06-28 03:16:55,890 INFO L125 PetriNetUnfolderBase]: For 848903/848907 co-relation queries the response was YES. [2024-06-28 03:16:55,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56898 conditions, 5185 events. 3369/5185 cut-off events. For 848903/848907 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28806 event pairs, 599 based on Foata normal form. 1/5182 useless extension candidates. Maximal degree in co-relation 56743. Up to 4814 conditions per place. [2024-06-28 03:16:55,974 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 431 selfloop transitions, 73 changer transitions 0/508 dead transitions. [2024-06-28 03:16:55,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 508 transitions, 8144 flow [2024-06-28 03:16:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-28 03:16:55,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-28 03:16:55,976 INFO L175 Difference]: Start difference. First operand has 315 places, 484 transitions, 6739 flow. Second operand 8 states and 130 transitions. [2024-06-28 03:16:55,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 508 transitions, 8144 flow [2024-06-28 03:16:57,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 508 transitions, 7879 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:57,595 INFO L231 Difference]: Finished difference. Result has 320 places, 491 transitions, 6811 flow [2024-06-28 03:16:57,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6474, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6811, PETRI_PLACES=320, PETRI_TRANSITIONS=491} [2024-06-28 03:16:57,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-28 03:16:57,596 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 491 transitions, 6811 flow [2024-06-28 03:16:57,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:16:57,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:57,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:57,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:16:57,597 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:57,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1159185308, now seen corresponding path program 8 times [2024-06-28 03:16:57,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:57,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850105538] [2024-06-28 03:16:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:57,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:58,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:58,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850105538] [2024-06-28 03:16:58,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850105538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:58,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:58,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:16:58,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954465635] [2024-06-28 03:16:58,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:58,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:16:58,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:16:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:16:58,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:16:58,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 491 transitions, 6811 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:58,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:58,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:16:58,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:59,501 INFO L124 PetriNetUnfolderBase]: 3403/5211 cut-off events. [2024-06-28 03:16:59,501 INFO L125 PetriNetUnfolderBase]: For 886069/886073 co-relation queries the response was YES. [2024-06-28 03:16:59,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58121 conditions, 5211 events. 3403/5211 cut-off events. For 886069/886073 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 28784 event pairs, 631 based on Foata normal form. 2/5203 useless extension candidates. Maximal degree in co-relation 57963. Up to 4333 conditions per place. [2024-06-28 03:16:59,571 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 338 selfloop transitions, 178 changer transitions 0/520 dead transitions. [2024-06-28 03:16:59,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 520 transitions, 8649 flow [2024-06-28 03:16:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:16:59,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-28 03:16:59,572 INFO L175 Difference]: Start difference. First operand has 320 places, 491 transitions, 6811 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:16:59,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 520 transitions, 8649 flow [2024-06-28 03:17:01,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 520 transitions, 8471 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:01,426 INFO L231 Difference]: Finished difference. Result has 323 places, 500 transitions, 7361 flow [2024-06-28 03:17:01,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7361, PETRI_PLACES=323, PETRI_TRANSITIONS=500} [2024-06-28 03:17:01,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-28 03:17:01,426 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 500 transitions, 7361 flow [2024-06-28 03:17:01,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:01,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:01,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:01,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:17:01,427 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:01,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:01,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1159422272, now seen corresponding path program 6 times [2024-06-28 03:17:01,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:01,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427754209] [2024-06-28 03:17:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:01,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:02,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427754209] [2024-06-28 03:17:02,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427754209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:02,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:02,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308632714] [2024-06-28 03:17:02,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:02,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:02,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:02,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:02,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 500 transitions, 7361 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:02,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:02,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:02,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:03,580 INFO L124 PetriNetUnfolderBase]: 3400/5217 cut-off events. [2024-06-28 03:17:03,580 INFO L125 PetriNetUnfolderBase]: For 899629/899633 co-relation queries the response was YES. [2024-06-28 03:17:03,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58942 conditions, 5217 events. 3400/5217 cut-off events. For 899629/899633 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 28871 event pairs, 615 based on Foata normal form. 1/5214 useless extension candidates. Maximal degree in co-relation 58783. Up to 4877 conditions per place. [2024-06-28 03:17:03,647 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 61 changer transitions 0/516 dead transitions. [2024-06-28 03:17:03,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 516 transitions, 8443 flow [2024-06-28 03:17:03,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:03,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:17:03,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 03:17:03,649 INFO L175 Difference]: Start difference. First operand has 323 places, 500 transitions, 7361 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:17:03,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 516 transitions, 8443 flow [2024-06-28 03:17:05,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 516 transitions, 8104 flow, removed 104 selfloop flow, removed 3 redundant places. [2024-06-28 03:17:05,485 INFO L231 Difference]: Finished difference. Result has 328 places, 500 transitions, 7150 flow [2024-06-28 03:17:05,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7022, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7150, PETRI_PLACES=328, PETRI_TRANSITIONS=500} [2024-06-28 03:17:05,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-28 03:17:05,485 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 500 transitions, 7150 flow [2024-06-28 03:17:05,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:05,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:05,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:05,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 03:17:05,486 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:05,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:05,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1159422458, now seen corresponding path program 9 times [2024-06-28 03:17:05,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:05,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112275206] [2024-06-28 03:17:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:05,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:06,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112275206] [2024-06-28 03:17:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112275206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:06,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:06,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814100827] [2024-06-28 03:17:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:06,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:06,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:06,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:06,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:06,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 500 transitions, 7150 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:06,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:06,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:06,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:07,441 INFO L124 PetriNetUnfolderBase]: 3394/5199 cut-off events. [2024-06-28 03:17:07,441 INFO L125 PetriNetUnfolderBase]: For 908516/908520 co-relation queries the response was YES. [2024-06-28 03:17:07,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58628 conditions, 5199 events. 3394/5199 cut-off events. For 908516/908520 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 28710 event pairs, 628 based on Foata normal form. 2/5191 useless extension candidates. Maximal degree in co-relation 58467. Up to 4324 conditions per place. [2024-06-28 03:17:07,520 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 179 changer transitions 0/520 dead transitions. [2024-06-28 03:17:07,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 520 transitions, 8636 flow [2024-06-28 03:17:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:17:07,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 03:17:07,522 INFO L175 Difference]: Start difference. First operand has 328 places, 500 transitions, 7150 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:17:07,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 520 transitions, 8636 flow [2024-06-28 03:17:09,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 520 transitions, 8446 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:09,865 INFO L231 Difference]: Finished difference. Result has 330 places, 500 transitions, 7324 flow [2024-06-28 03:17:09,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6960, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7324, PETRI_PLACES=330, PETRI_TRANSITIONS=500} [2024-06-28 03:17:09,866 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-28 03:17:09,866 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 500 transitions, 7324 flow [2024-06-28 03:17:09,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:09,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:09,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:09,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 03:17:09,867 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:09,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:09,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1383349534, now seen corresponding path program 7 times [2024-06-28 03:17:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:09,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396688673] [2024-06-28 03:17:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:09,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:10,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:10,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396688673] [2024-06-28 03:17:10,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396688673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:10,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:10,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:10,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606226022] [2024-06-28 03:17:10,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:10,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:10,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:10,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:10,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:10,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 500 transitions, 7324 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:10,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:10,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:10,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:11,867 INFO L124 PetriNetUnfolderBase]: 3404/5235 cut-off events. [2024-06-28 03:17:11,868 INFO L125 PetriNetUnfolderBase]: For 927124/927132 co-relation queries the response was YES. [2024-06-28 03:17:11,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59396 conditions, 5235 events. 3404/5235 cut-off events. For 927124/927132 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29143 event pairs, 622 based on Foata normal form. 6/5239 useless extension candidates. Maximal degree in co-relation 59234. Up to 4759 conditions per place. [2024-06-28 03:17:11,942 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 95 changer transitions 0/517 dead transitions. [2024-06-28 03:17:11,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 517 transitions, 8678 flow [2024-06-28 03:17:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:17:11,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-28 03:17:11,944 INFO L175 Difference]: Start difference. First operand has 330 places, 500 transitions, 7324 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:17:11,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 517 transitions, 8678 flow [2024-06-28 03:17:14,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 517 transitions, 8279 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:14,309 INFO L231 Difference]: Finished difference. Result has 332 places, 504 transitions, 7220 flow [2024-06-28 03:17:14,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6925, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7220, PETRI_PLACES=332, PETRI_TRANSITIONS=504} [2024-06-28 03:17:14,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-28 03:17:14,309 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 504 transitions, 7220 flow [2024-06-28 03:17:14,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:14,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:14,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:14,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 03:17:14,310 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:14,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1029033274, now seen corresponding path program 8 times [2024-06-28 03:17:14,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:14,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605614499] [2024-06-28 03:17:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:15,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605614499] [2024-06-28 03:17:15,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605614499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:15,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:15,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:15,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160658220] [2024-06-28 03:17:15,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:15,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:15,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 504 transitions, 7220 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:15,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:15,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:15,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:16,346 INFO L124 PetriNetUnfolderBase]: 3406/5241 cut-off events. [2024-06-28 03:17:16,346 INFO L125 PetriNetUnfolderBase]: For 937992/938000 co-relation queries the response was YES. [2024-06-28 03:17:16,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59084 conditions, 5241 events. 3406/5241 cut-off events. For 937992/938000 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29148 event pairs, 624 based on Foata normal form. 6/5245 useless extension candidates. Maximal degree in co-relation 58921. Up to 4797 conditions per place. [2024-06-28 03:17:16,421 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 432 selfloop transitions, 83 changer transitions 0/519 dead transitions. [2024-06-28 03:17:16,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 519 transitions, 8374 flow [2024-06-28 03:17:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:16,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:17:16,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 03:17:16,424 INFO L175 Difference]: Start difference. First operand has 332 places, 504 transitions, 7220 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:17:16,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 519 transitions, 8374 flow [2024-06-28 03:17:18,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 519 transitions, 8146 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:18,633 INFO L231 Difference]: Finished difference. Result has 335 places, 507 transitions, 7255 flow [2024-06-28 03:17:18,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6994, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7255, PETRI_PLACES=335, PETRI_TRANSITIONS=507} [2024-06-28 03:17:18,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-28 03:17:18,634 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 507 transitions, 7255 flow [2024-06-28 03:17:18,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:18,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:18,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:18,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 03:17:18,635 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:18,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1671491600, now seen corresponding path program 10 times [2024-06-28 03:17:18,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:18,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695262823] [2024-06-28 03:17:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:18,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:19,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:19,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695262823] [2024-06-28 03:17:19,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695262823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:19,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:19,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:19,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018160465] [2024-06-28 03:17:19,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:19,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:19,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:19,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 507 transitions, 7255 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:19,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:19,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:19,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:20,527 INFO L124 PetriNetUnfolderBase]: 3432/5285 cut-off events. [2024-06-28 03:17:20,527 INFO L125 PetriNetUnfolderBase]: For 968077/968083 co-relation queries the response was YES. [2024-06-28 03:17:20,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59903 conditions, 5285 events. 3432/5285 cut-off events. For 968077/968083 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29419 event pairs, 719 based on Foata normal form. 4/5288 useless extension candidates. Maximal degree in co-relation 59739. Up to 4117 conditions per place. [2024-06-28 03:17:20,603 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 331 selfloop transitions, 199 changer transitions 0/534 dead transitions. [2024-06-28 03:17:20,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 534 transitions, 9153 flow [2024-06-28 03:17:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 03:17:20,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-28 03:17:20,604 INFO L175 Difference]: Start difference. First operand has 335 places, 507 transitions, 7255 flow. Second operand 9 states and 146 transitions. [2024-06-28 03:17:20,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 534 transitions, 9153 flow [2024-06-28 03:17:22,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 534 transitions, 8926 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:22,905 INFO L231 Difference]: Finished difference. Result has 338 places, 517 transitions, 7822 flow [2024-06-28 03:17:22,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7028, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7822, PETRI_PLACES=338, PETRI_TRANSITIONS=517} [2024-06-28 03:17:22,905 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-28 03:17:22,905 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 517 transitions, 7822 flow [2024-06-28 03:17:22,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:22,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:22,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:22,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 03:17:22,906 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:22,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:22,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1560659614, now seen corresponding path program 9 times [2024-06-28 03:17:22,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:22,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810217875] [2024-06-28 03:17:22,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:22,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:23,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:23,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810217875] [2024-06-28 03:17:23,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810217875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:23,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:23,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:23,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891068423] [2024-06-28 03:17:23,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:23,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:23,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:23,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:23,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:23,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 517 transitions, 7822 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:23,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:23,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:23,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:25,109 INFO L124 PetriNetUnfolderBase]: 3437/5284 cut-off events. [2024-06-28 03:17:25,109 INFO L125 PetriNetUnfolderBase]: For 989078/989086 co-relation queries the response was YES. [2024-06-28 03:17:25,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60995 conditions, 5284 events. 3437/5284 cut-off events. For 989078/989086 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29408 event pairs, 625 based on Foata normal form. 5/5287 useless extension candidates. Maximal degree in co-relation 60830. Up to 4820 conditions per place. [2024-06-28 03:17:25,185 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 103 changer transitions 0/534 dead transitions. [2024-06-28 03:17:25,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 534 transitions, 9211 flow [2024-06-28 03:17:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:25,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:17:25,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:17:25,186 INFO L175 Difference]: Start difference. First operand has 338 places, 517 transitions, 7822 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:17:25,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 534 transitions, 9211 flow [2024-06-28 03:17:28,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 534 transitions, 8880 flow, removed 106 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:28,033 INFO L231 Difference]: Finished difference. Result has 343 places, 521 transitions, 7819 flow [2024-06-28 03:17:28,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7491, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7819, PETRI_PLACES=343, PETRI_TRANSITIONS=521} [2024-06-28 03:17:28,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-28 03:17:28,033 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 521 transitions, 7819 flow [2024-06-28 03:17:28,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:28,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:28,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:28,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 03:17:28,034 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:28,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1553814628, now seen corresponding path program 11 times [2024-06-28 03:17:28,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:28,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409092331] [2024-06-28 03:17:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:28,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:28,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409092331] [2024-06-28 03:17:28,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409092331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:28,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:28,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:28,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963429570] [2024-06-28 03:17:28,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:28,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:28,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:28,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:28,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:28,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:28,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 521 transitions, 7819 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:28,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:28,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:28,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:30,072 INFO L124 PetriNetUnfolderBase]: 3489/5360 cut-off events. [2024-06-28 03:17:30,073 INFO L125 PetriNetUnfolderBase]: For 1022315/1022321 co-relation queries the response was YES. [2024-06-28 03:17:30,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61065 conditions, 5360 events. 3489/5360 cut-off events. For 1022315/1022321 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 29777 event pairs, 718 based on Foata normal form. 6/5365 useless extension candidates. Maximal degree in co-relation 60897. Up to 4164 conditions per place. [2024-06-28 03:17:30,146 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 346 selfloop transitions, 198 changer transitions 0/548 dead transitions. [2024-06-28 03:17:30,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 548 transitions, 9661 flow [2024-06-28 03:17:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 03:17:30,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-28 03:17:30,148 INFO L175 Difference]: Start difference. First operand has 343 places, 521 transitions, 7819 flow. Second operand 9 states and 147 transitions. [2024-06-28 03:17:30,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 548 transitions, 9661 flow [2024-06-28 03:17:33,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 548 transitions, 9410 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:33,163 INFO L231 Difference]: Finished difference. Result has 347 places, 530 transitions, 8229 flow [2024-06-28 03:17:33,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7568, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8229, PETRI_PLACES=347, PETRI_TRANSITIONS=530} [2024-06-28 03:17:33,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-28 03:17:33,163 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 530 transitions, 8229 flow [2024-06-28 03:17:33,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:33,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:33,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:33,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 03:17:33,164 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:33,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:33,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1420922570, now seen corresponding path program 10 times [2024-06-28 03:17:33,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:33,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426952874] [2024-06-28 03:17:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:33,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:33,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:33,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426952874] [2024-06-28 03:17:33,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426952874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:33,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:33,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:33,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290343635] [2024-06-28 03:17:33,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:33,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:33,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:33,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:33,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:33,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:33,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 530 transitions, 8229 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:33,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:33,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:33,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:35,411 INFO L124 PetriNetUnfolderBase]: 3491/5359 cut-off events. [2024-06-28 03:17:35,411 INFO L125 PetriNetUnfolderBase]: For 1027996/1028004 co-relation queries the response was YES. [2024-06-28 03:17:35,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61624 conditions, 5359 events. 3491/5359 cut-off events. For 1027996/1028004 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29852 event pairs, 631 based on Foata normal form. 6/5363 useless extension candidates. Maximal degree in co-relation 61455. Up to 4764 conditions per place. [2024-06-28 03:17:35,487 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 138 changer transitions 0/547 dead transitions. [2024-06-28 03:17:35,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 547 transitions, 9839 flow [2024-06-28 03:17:35,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:17:35,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 03:17:35,489 INFO L175 Difference]: Start difference. First operand has 347 places, 530 transitions, 8229 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:17:35,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 547 transitions, 9839 flow [2024-06-28 03:17:38,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 547 transitions, 9484 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:38,454 INFO L231 Difference]: Finished difference. Result has 350 places, 533 transitions, 8236 flow [2024-06-28 03:17:38,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7874, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8236, PETRI_PLACES=350, PETRI_TRANSITIONS=533} [2024-06-28 03:17:38,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-28 03:17:38,455 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 533 transitions, 8236 flow [2024-06-28 03:17:38,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:38,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:38,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:38,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 03:17:38,456 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:38,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:38,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1560243904, now seen corresponding path program 11 times [2024-06-28 03:17:38,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:38,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986391481] [2024-06-28 03:17:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:38,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:39,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:39,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986391481] [2024-06-28 03:17:39,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986391481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:39,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:39,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:39,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817806281] [2024-06-28 03:17:39,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:39,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:39,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:39,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:39,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 533 transitions, 8236 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:39,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:39,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:39,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:40,796 INFO L124 PetriNetUnfolderBase]: 3486/5353 cut-off events. [2024-06-28 03:17:40,796 INFO L125 PetriNetUnfolderBase]: For 1033286/1033294 co-relation queries the response was YES. [2024-06-28 03:17:40,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61199 conditions, 5353 events. 3486/5353 cut-off events. For 1033286/1033294 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29766 event pairs, 629 based on Foata normal form. 5/5356 useless extension candidates. Maximal degree in co-relation 61029. Up to 4911 conditions per place. [2024-06-28 03:17:40,870 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 90 changer transitions 0/545 dead transitions. [2024-06-28 03:17:40,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 545 transitions, 9358 flow [2024-06-28 03:17:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 03:17:40,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-28 03:17:40,872 INFO L175 Difference]: Start difference. First operand has 350 places, 533 transitions, 8236 flow. Second operand 8 states and 125 transitions. [2024-06-28 03:17:40,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 545 transitions, 9358 flow [2024-06-28 03:17:43,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 545 transitions, 8983 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:43,449 INFO L231 Difference]: Finished difference. Result has 353 places, 533 transitions, 8047 flow [2024-06-28 03:17:43,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7861, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8047, PETRI_PLACES=353, PETRI_TRANSITIONS=533} [2024-06-28 03:17:43,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-28 03:17:43,449 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 533 transitions, 8047 flow [2024-06-28 03:17:43,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:43,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:43,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:43,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 03:17:43,450 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:43,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:43,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1560243718, now seen corresponding path program 12 times [2024-06-28 03:17:43,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:43,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993211695] [2024-06-28 03:17:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:44,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:44,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993211695] [2024-06-28 03:17:44,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993211695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:44,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:44,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:44,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436662518] [2024-06-28 03:17:44,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:44,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:44,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:44,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:44,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:44,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:44,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 533 transitions, 8047 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:44,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:44,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:44,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:45,612 INFO L124 PetriNetUnfolderBase]: 3480/5347 cut-off events. [2024-06-28 03:17:45,612 INFO L125 PetriNetUnfolderBase]: For 1046134/1046140 co-relation queries the response was YES. [2024-06-28 03:17:45,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60812 conditions, 5347 events. 3480/5347 cut-off events. For 1046134/1046140 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 29710 event pairs, 721 based on Foata normal form. 4/5350 useless extension candidates. Maximal degree in co-relation 60641. Up to 4157 conditions per place. [2024-06-28 03:17:45,685 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 342 selfloop transitions, 206 changer transitions 0/552 dead transitions. [2024-06-28 03:17:45,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 552 transitions, 9661 flow [2024-06-28 03:17:45,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:45,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-28 03:17:45,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-28 03:17:45,687 INFO L175 Difference]: Start difference. First operand has 353 places, 533 transitions, 8047 flow. Second operand 9 states and 147 transitions. [2024-06-28 03:17:45,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 552 transitions, 9661 flow [2024-06-28 03:17:48,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 552 transitions, 9431 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 03:17:48,922 INFO L231 Difference]: Finished difference. Result has 354 places, 534 transitions, 8271 flow [2024-06-28 03:17:48,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7817, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8271, PETRI_PLACES=354, PETRI_TRANSITIONS=534} [2024-06-28 03:17:48,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-28 03:17:48,922 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 534 transitions, 8271 flow [2024-06-28 03:17:48,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:48,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:48,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:48,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 03:17:48,923 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)] === [2024-06-28 03:17:48,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:48,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1788560764, now seen corresponding path program 12 times [2024-06-28 03:17:48,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:48,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161872] [2024-06-28 03:17:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:48,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:49,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:49,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161872] [2024-06-28 03:17:49,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:49,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:49,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:49,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376639086] [2024-06-28 03:17:49,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:49,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:49,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:49,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:49,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:49,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 534 transitions, 8271 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:49,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:49,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:49,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:51,062 INFO L124 PetriNetUnfolderBase]: 3475/5335 cut-off events. [2024-06-28 03:17:51,062 INFO L125 PetriNetUnfolderBase]: For 1056427/1056435 co-relation queries the response was YES. [2024-06-28 03:17:51,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61303 conditions, 5335 events. 3475/5335 cut-off events. For 1056427/1056435 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 29637 event pairs, 630 based on Foata normal form. 5/5338 useless extension candidates. Maximal degree in co-relation 61131. Up to 4746 conditions per place. [2024-06-28 03:17:51,380 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 146 changer transitions 0/546 dead transitions. [2024-06-28 03:17:51,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 546 transitions, 9395 flow [2024-06-28 03:17:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:17:51,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:17:51,382 INFO L175 Difference]: Start difference. First operand has 354 places, 534 transitions, 8271 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:17:51,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 546 transitions, 9395 flow [2024-06-28 03:17:54,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 546 transitions, 9042 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:54,671 INFO L231 Difference]: Finished difference. Result has 357 places, 534 transitions, 8216 flow [2024-06-28 03:17:54,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7918, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8216, PETRI_PLACES=357, PETRI_TRANSITIONS=534} [2024-06-28 03:17:54,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-28 03:17:54,672 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 534 transitions, 8216 flow [2024-06-28 03:17:54,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:54,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:54,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:54,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 03:17:54,672 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)] === [2024-06-28 03:17:54,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1382989066, now seen corresponding path program 4 times [2024-06-28 03:17:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:54,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350161664] [2024-06-28 03:17:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:54,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:55,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:55,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350161664] [2024-06-28 03:17:55,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350161664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:55,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:55,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:55,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169250821] [2024-06-28 03:17:55,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:55,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:55,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:55,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:17:55,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 534 transitions, 8216 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:55,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:55,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:17:55,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:56,731 INFO L124 PetriNetUnfolderBase]: 3478/5348 cut-off events. [2024-06-28 03:17:56,731 INFO L125 PetriNetUnfolderBase]: For 1080514/1080522 co-relation queries the response was YES. [2024-06-28 03:17:56,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61027 conditions, 5348 events. 3478/5348 cut-off events. For 1080514/1080522 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 29826 event pairs, 632 based on Foata normal form. 8/5354 useless extension candidates. Maximal degree in co-relation 60854. Up to 4892 conditions per place. [2024-06-28 03:17:56,816 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 462 selfloop transitions, 84 changer transitions 0/550 dead transitions. [2024-06-28 03:17:56,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 550 transitions, 9494 flow [2024-06-28 03:17:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:17:56,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-28 03:17:56,818 INFO L175 Difference]: Start difference. First operand has 357 places, 534 transitions, 8216 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:17:56,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 550 transitions, 9494 flow [2024-06-28 03:17:59,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 550 transitions, 8989 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-28 03:17:59,463 INFO L231 Difference]: Finished difference. Result has 355 places, 537 transitions, 8035 flow [2024-06-28 03:17:59,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7711, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8035, PETRI_PLACES=355, PETRI_TRANSITIONS=537} [2024-06-28 03:17:59,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-28 03:17:59,464 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 537 transitions, 8035 flow [2024-06-28 03:17:59,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:17:59,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:59,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:59,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 03:17:59,464 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)] === [2024-06-28 03:17:59,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1796664908, now seen corresponding path program 5 times [2024-06-28 03:17:59,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:59,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391131984] [2024-06-28 03:17:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:00,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:00,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391131984] [2024-06-28 03:18:00,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391131984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:00,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:00,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:00,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634941471] [2024-06-28 03:18:00,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:00,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:00,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:00,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:00,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:00,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 537 transitions, 8035 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:00,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:00,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:00,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:02,086 INFO L124 PetriNetUnfolderBase]: 3506/5385 cut-off events. [2024-06-28 03:18:02,086 INFO L125 PetriNetUnfolderBase]: For 1098748/1098754 co-relation queries the response was YES. [2024-06-28 03:18:02,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61820 conditions, 5385 events. 3506/5385 cut-off events. For 1098748/1098754 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30047 event pairs, 704 based on Foata normal form. 6/5390 useless extension candidates. Maximal degree in co-relation 61648. Up to 5152 conditions per place. [2024-06-28 03:18:02,336 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 512 selfloop transitions, 49 changer transitions 0/565 dead transitions. [2024-06-28 03:18:02,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 565 transitions, 9820 flow [2024-06-28 03:18:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-28 03:18:02,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-28 03:18:02,338 INFO L175 Difference]: Start difference. First operand has 355 places, 537 transitions, 8035 flow. Second operand 9 states and 137 transitions. [2024-06-28 03:18:02,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 565 transitions, 9820 flow [2024-06-28 03:18:05,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 565 transitions, 9518 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-28 03:18:05,728 INFO L231 Difference]: Finished difference. Result has 360 places, 552 transitions, 8298 flow [2024-06-28 03:18:05,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7733, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8298, PETRI_PLACES=360, PETRI_TRANSITIONS=552} [2024-06-28 03:18:05,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-28 03:18:05,729 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 552 transitions, 8298 flow [2024-06-28 03:18:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:05,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:05,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:05,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 03:18:05,729 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)] === [2024-06-28 03:18:05,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:05,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1382999978, now seen corresponding path program 6 times [2024-06-28 03:18:05,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:05,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214027952] [2024-06-28 03:18:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:05,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:06,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:06,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214027952] [2024-06-28 03:18:06,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214027952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:06,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:06,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:06,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614649865] [2024-06-28 03:18:06,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:06,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:06,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:06,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:06,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:06,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 552 transitions, 8298 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:06,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:06,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:06,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:08,104 INFO L124 PetriNetUnfolderBase]: 3516/5400 cut-off events. [2024-06-28 03:18:08,105 INFO L125 PetriNetUnfolderBase]: For 1122191/1122197 co-relation queries the response was YES. [2024-06-28 03:18:08,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62256 conditions, 5400 events. 3516/5400 cut-off events. For 1122191/1122197 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30122 event pairs, 624 based on Foata normal form. 6/5404 useless extension candidates. Maximal degree in co-relation 62081. Up to 4945 conditions per place. [2024-06-28 03:18:08,179 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 476 selfloop transitions, 89 changer transitions 0/569 dead transitions. [2024-06-28 03:18:08,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 569 transitions, 9646 flow [2024-06-28 03:18:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 03:18:08,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-28 03:18:08,180 INFO L175 Difference]: Start difference. First operand has 360 places, 552 transitions, 8298 flow. Second operand 9 states and 140 transitions. [2024-06-28 03:18:08,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 569 transitions, 9646 flow [2024-06-28 03:18:10,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 569 transitions, 9186 flow, removed 123 selfloop flow, removed 6 redundant places. [2024-06-28 03:18:10,992 INFO L231 Difference]: Finished difference. Result has 363 places, 556 transitions, 8207 flow [2024-06-28 03:18:10,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7838, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8207, PETRI_PLACES=363, PETRI_TRANSITIONS=556} [2024-06-28 03:18:10,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-28 03:18:10,992 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 556 transitions, 8207 flow [2024-06-28 03:18:10,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:10,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:10,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 03:18:10,993 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)] === [2024-06-28 03:18:10,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash -736648558, now seen corresponding path program 7 times [2024-06-28 03:18:10,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:10,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572999393] [2024-06-28 03:18:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:10,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:11,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:11,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572999393] [2024-06-28 03:18:11,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572999393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:11,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:11,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:11,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148215675] [2024-06-28 03:18:11,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:11,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:11,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:11,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:11,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:11,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 556 transitions, 8207 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:11,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:11,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:11,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:13,426 INFO L124 PetriNetUnfolderBase]: 3608/5533 cut-off events. [2024-06-28 03:18:13,426 INFO L125 PetriNetUnfolderBase]: For 1213636/1213644 co-relation queries the response was YES. [2024-06-28 03:18:13,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65323 conditions, 5533 events. 3608/5533 cut-off events. For 1213636/1213644 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30959 event pairs, 634 based on Foata normal form. 8/5539 useless extension candidates. Maximal degree in co-relation 65148. Up to 4944 conditions per place. [2024-06-28 03:18:13,508 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 473 selfloop transitions, 110 changer transitions 0/587 dead transitions. [2024-06-28 03:18:13,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 587 transitions, 10513 flow [2024-06-28 03:18:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:13,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 03:18:13,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-28 03:18:13,509 INFO L175 Difference]: Start difference. First operand has 363 places, 556 transitions, 8207 flow. Second operand 9 states and 148 transitions. [2024-06-28 03:18:13,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 587 transitions, 10513 flow [2024-06-28 03:18:18,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 587 transitions, 10172 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:18,043 INFO L231 Difference]: Finished difference. Result has 367 places, 568 transitions, 8649 flow [2024-06-28 03:18:18,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7866, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8649, PETRI_PLACES=367, PETRI_TRANSITIONS=568} [2024-06-28 03:18:18,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-28 03:18:18,044 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 568 transitions, 8649 flow [2024-06-28 03:18:18,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:18,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:18,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:18,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 03:18:18,044 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)] === [2024-06-28 03:18:18,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:18,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1782855772, now seen corresponding path program 2 times [2024-06-28 03:18:18,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:18,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100345079] [2024-06-28 03:18:18,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:18,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:19,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:19,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100345079] [2024-06-28 03:18:19,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100345079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:19,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:19,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:19,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266274259] [2024-06-28 03:18:19,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:19,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:19,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:19,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:19,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 568 transitions, 8649 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:19,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:19,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:19,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:21,140 INFO L124 PetriNetUnfolderBase]: 3605/5540 cut-off events. [2024-06-28 03:18:21,140 INFO L125 PetriNetUnfolderBase]: For 1229366/1229376 co-relation queries the response was YES. [2024-06-28 03:18:21,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65885 conditions, 5540 events. 3605/5540 cut-off events. For 1229366/1229376 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31113 event pairs, 617 based on Foata normal form. 11/5550 useless extension candidates. Maximal degree in co-relation 65707. Up to 5293 conditions per place. [2024-06-28 03:18:21,225 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 532 selfloop transitions, 48 changer transitions 0/584 dead transitions. [2024-06-28 03:18:21,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 584 transitions, 10007 flow [2024-06-28 03:18:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-28 03:18:21,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-28 03:18:21,226 INFO L175 Difference]: Start difference. First operand has 367 places, 568 transitions, 8649 flow. Second operand 9 states and 134 transitions. [2024-06-28 03:18:21,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 584 transitions, 10007 flow [2024-06-28 03:18:25,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 584 transitions, 9704 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-28 03:18:25,332 INFO L231 Difference]: Finished difference. Result has 372 places, 571 transitions, 8606 flow [2024-06-28 03:18:25,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8348, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8606, PETRI_PLACES=372, PETRI_TRANSITIONS=571} [2024-06-28 03:18:25,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-28 03:18:25,333 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 571 transitions, 8606 flow [2024-06-28 03:18:25,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:25,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:25,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:25,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 03:18:25,333 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)] === [2024-06-28 03:18:25,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:25,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1782855338, now seen corresponding path program 8 times [2024-06-28 03:18:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:25,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106501075] [2024-06-28 03:18:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:25,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:26,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:26,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106501075] [2024-06-28 03:18:26,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106501075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:26,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:26,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:26,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205850208] [2024-06-28 03:18:26,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:26,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:26,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:26,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:26,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:26,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 571 transitions, 8606 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:26,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:26,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:26,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:27,751 INFO L124 PetriNetUnfolderBase]: 3653/5609 cut-off events. [2024-06-28 03:18:27,751 INFO L125 PetriNetUnfolderBase]: For 1288552/1288560 co-relation queries the response was YES. [2024-06-28 03:18:27,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67267 conditions, 5609 events. 3653/5609 cut-off events. For 1288552/1288560 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 31549 event pairs, 630 based on Foata normal form. 8/5615 useless extension candidates. Maximal degree in co-relation 67087. Up to 4629 conditions per place. [2024-06-28 03:18:27,836 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 419 selfloop transitions, 182 changer transitions 0/605 dead transitions. [2024-06-28 03:18:27,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 605 transitions, 11354 flow [2024-06-28 03:18:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:18:27,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 03:18:27,837 INFO L175 Difference]: Start difference. First operand has 372 places, 571 transitions, 8606 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:18:27,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 605 transitions, 11354 flow [2024-06-28 03:18:31,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 605 transitions, 11118 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:31,242 INFO L231 Difference]: Finished difference. Result has 375 places, 582 transitions, 9223 flow [2024-06-28 03:18:31,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8370, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9223, PETRI_PLACES=375, PETRI_TRANSITIONS=582} [2024-06-28 03:18:31,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-28 03:18:31,242 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 582 transitions, 9223 flow [2024-06-28 03:18:31,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:31,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:31,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:31,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 03:18:31,243 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)] === [2024-06-28 03:18:31,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1383358028, now seen corresponding path program 9 times [2024-06-28 03:18:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:31,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386394033] [2024-06-28 03:18:31,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:32,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:32,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386394033] [2024-06-28 03:18:32,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386394033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:32,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:32,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:32,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847490930] [2024-06-28 03:18:32,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:32,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:32,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:32,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:32,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:32,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:32,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 582 transitions, 9223 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:32,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:32,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:32,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:33,637 INFO L124 PetriNetUnfolderBase]: 3649/5605 cut-off events. [2024-06-28 03:18:33,637 INFO L125 PetriNetUnfolderBase]: For 1289175/1289183 co-relation queries the response was YES. [2024-06-28 03:18:33,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68081 conditions, 5605 events. 3649/5605 cut-off events. For 1289175/1289183 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 31538 event pairs, 635 based on Foata normal form. 6/5609 useless extension candidates. Maximal degree in co-relation 67899. Up to 5055 conditions per place. [2024-06-28 03:18:33,728 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 495 selfloop transitions, 108 changer transitions 0/607 dead transitions. [2024-06-28 03:18:33,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 607 transitions, 11069 flow [2024-06-28 03:18:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:33,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 03:18:33,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-28 03:18:33,729 INFO L175 Difference]: Start difference. First operand has 375 places, 582 transitions, 9223 flow. Second operand 9 states and 143 transitions. [2024-06-28 03:18:33,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 607 transitions, 11069 flow [2024-06-28 03:18:36,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 607 transitions, 10562 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-28 03:18:36,699 INFO L231 Difference]: Finished difference. Result has 380 places, 592 transitions, 9331 flow [2024-06-28 03:18:36,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8728, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9331, PETRI_PLACES=380, PETRI_TRANSITIONS=592} [2024-06-28 03:18:36,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-28 03:18:36,700 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 592 transitions, 9331 flow [2024-06-28 03:18:36,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:36,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:36,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:36,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 03:18:36,700 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)] === [2024-06-28 03:18:36,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:36,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1782843248, now seen corresponding path program 10 times [2024-06-28 03:18:36,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:36,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649776086] [2024-06-28 03:18:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:36,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:37,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:37,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649776086] [2024-06-28 03:18:37,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649776086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:37,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:37,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:37,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099621289] [2024-06-28 03:18:37,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:37,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:37,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:37,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:37,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:37,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:37,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 592 transitions, 9331 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:37,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:37,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:37,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:39,095 INFO L124 PetriNetUnfolderBase]: 3661/5620 cut-off events. [2024-06-28 03:18:39,096 INFO L125 PetriNetUnfolderBase]: For 1309573/1309581 co-relation queries the response was YES. [2024-06-28 03:18:39,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67446 conditions, 5620 events. 3661/5620 cut-off events. For 1309573/1309581 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 31570 event pairs, 627 based on Foata normal form. 8/5626 useless extension candidates. Maximal degree in co-relation 67262. Up to 4644 conditions per place. [2024-06-28 03:18:39,186 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 415 selfloop transitions, 202 changer transitions 0/621 dead transitions. [2024-06-28 03:18:39,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 621 transitions, 11842 flow [2024-06-28 03:18:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:18:39,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 03:18:39,187 INFO L175 Difference]: Start difference. First operand has 380 places, 592 transitions, 9331 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:18:39,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 621 transitions, 11842 flow [2024-06-28 03:18:42,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 621 transitions, 11553 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-28 03:18:42,943 INFO L231 Difference]: Finished difference. Result has 386 places, 601 transitions, 9909 flow [2024-06-28 03:18:42,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9042, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9909, PETRI_PLACES=386, PETRI_TRANSITIONS=601} [2024-06-28 03:18:42,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-28 03:18:42,944 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 601 transitions, 9909 flow [2024-06-28 03:18:42,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:42,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:42,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:42,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 03:18:42,945 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)] === [2024-06-28 03:18:42,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:42,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1648108546, now seen corresponding path program 13 times [2024-06-28 03:18:42,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:42,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949739767] [2024-06-28 03:18:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:43,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:43,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949739767] [2024-06-28 03:18:43,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949739767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:43,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:43,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:18:43,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040527029] [2024-06-28 03:18:43,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:43,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:18:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:18:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:18:43,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:43,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 601 transitions, 9909 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:18:43,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:43,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:43,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:45,142 INFO L124 PetriNetUnfolderBase]: 3771/5776 cut-off events. [2024-06-28 03:18:45,142 INFO L125 PetriNetUnfolderBase]: For 1333709/1333715 co-relation queries the response was YES. [2024-06-28 03:18:45,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69863 conditions, 5776 events. 3771/5776 cut-off events. For 1333709/1333715 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32643 event pairs, 619 based on Foata normal form. 4/5779 useless extension candidates. Maximal degree in co-relation 69675. Up to 4976 conditions per place. [2024-06-28 03:18:45,242 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 509 selfloop transitions, 145 changer transitions 0/658 dead transitions. [2024-06-28 03:18:45,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 658 transitions, 11894 flow [2024-06-28 03:18:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 03:18:45,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-28 03:18:45,243 INFO L175 Difference]: Start difference. First operand has 386 places, 601 transitions, 9909 flow. Second operand 9 states and 156 transitions. [2024-06-28 03:18:45,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 658 transitions, 11894 flow [2024-06-28 03:18:50,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 658 transitions, 11404 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-28 03:18:50,242 INFO L231 Difference]: Finished difference. Result has 393 places, 634 transitions, 10406 flow [2024-06-28 03:18:50,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9427, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10406, PETRI_PLACES=393, PETRI_TRANSITIONS=634} [2024-06-28 03:18:50,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-28 03:18:50,243 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 634 transitions, 10406 flow [2024-06-28 03:18:50,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:18:50,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:50,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:50,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 03:18:50,244 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)] === [2024-06-28 03:18:50,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 269420004, now seen corresponding path program 14 times [2024-06-28 03:18:50,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:50,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255928963] [2024-06-28 03:18:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:50,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:50,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255928963] [2024-06-28 03:18:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255928963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:50,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:50,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:18:50,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393336919] [2024-06-28 03:18:50,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:50,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:18:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:18:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:18:50,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:50,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 634 transitions, 10406 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:18:50,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:50,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:50,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:52,522 INFO L124 PetriNetUnfolderBase]: 3779/5786 cut-off events. [2024-06-28 03:18:52,522 INFO L125 PetriNetUnfolderBase]: For 1323978/1323984 co-relation queries the response was YES. [2024-06-28 03:18:52,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69655 conditions, 5786 events. 3779/5786 cut-off events. For 1323978/1323984 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32735 event pairs, 596 based on Foata normal form. 6/5791 useless extension candidates. Maximal degree in co-relation 69463. Up to 4972 conditions per place. [2024-06-28 03:18:52,619 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 530 selfloop transitions, 143 changer transitions 0/677 dead transitions. [2024-06-28 03:18:52,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 677 transitions, 12047 flow [2024-06-28 03:18:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 03:18:52,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-28 03:18:52,620 INFO L175 Difference]: Start difference. First operand has 393 places, 634 transitions, 10406 flow. Second operand 9 states and 161 transitions. [2024-06-28 03:18:52,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 677 transitions, 12047 flow [2024-06-28 03:18:57,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 677 transitions, 11719 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-28 03:18:57,650 INFO L231 Difference]: Finished difference. Result has 399 places, 639 transitions, 10489 flow [2024-06-28 03:18:57,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10080, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10489, PETRI_PLACES=399, PETRI_TRANSITIONS=639} [2024-06-28 03:18:57,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-28 03:18:57,650 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 639 transitions, 10489 flow [2024-06-28 03:18:57,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:18:57,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:57,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:57,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 03:18:57,651 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)] === [2024-06-28 03:18:57,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash 446671494, now seen corresponding path program 15 times [2024-06-28 03:18:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:57,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153212632] [2024-06-28 03:18:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153212632] [2024-06-28 03:18:58,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153212632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:58,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:58,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:18:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890024774] [2024-06-28 03:18:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:58,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:18:58,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:18:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:18:58,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:18:58,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 639 transitions, 10489 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:18:58,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:58,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:18:58,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:00,039 INFO L124 PetriNetUnfolderBase]: 3947/6026 cut-off events. [2024-06-28 03:19:00,039 INFO L125 PetriNetUnfolderBase]: For 1353664/1353670 co-relation queries the response was YES. [2024-06-28 03:19:00,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71942 conditions, 6026 events. 3947/6026 cut-off events. For 1353664/1353670 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 34153 event pairs, 634 based on Foata normal form. 6/6031 useless extension candidates. Maximal degree in co-relation 71748. Up to 4913 conditions per place. [2024-06-28 03:19:00,141 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 534 selfloop transitions, 189 changer transitions 0/727 dead transitions. [2024-06-28 03:19:00,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 727 transitions, 13298 flow [2024-06-28 03:19:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:19:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:19:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:19:00,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-28 03:19:00,143 INFO L175 Difference]: Start difference. First operand has 399 places, 639 transitions, 10489 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:19:00,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 727 transitions, 13298 flow [2024-06-28 03:19:05,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 727 transitions, 12869 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-28 03:19:05,737 INFO L231 Difference]: Finished difference. Result has 401 places, 678 transitions, 11375 flow [2024-06-28 03:19:05,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10077, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11375, PETRI_PLACES=401, PETRI_TRANSITIONS=678} [2024-06-28 03:19:05,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-28 03:19:05,738 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 678 transitions, 11375 flow [2024-06-28 03:19:05,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-28 03:19:05,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:05,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 03:19:05,739 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)] === [2024-06-28 03:19:05,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:05,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2102281488, now seen corresponding path program 1 times [2024-06-28 03:19:05,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:05,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887327904] [2024-06-28 03:19:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:05,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:06,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:06,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887327904] [2024-06-28 03:19:06,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887327904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:06,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:06,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:06,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278619006] [2024-06-28 03:19:06,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:06,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:06,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:06,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:06,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:06,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:19:06,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 678 transitions, 11375 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:06,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:06,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:19:06,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:08,566 INFO L124 PetriNetUnfolderBase]: 3811/5884 cut-off events. [2024-06-28 03:19:08,566 INFO L125 PetriNetUnfolderBase]: For 1367200/1367202 co-relation queries the response was YES. [2024-06-28 03:19:08,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71797 conditions, 5884 events. 3811/5884 cut-off events. For 1367200/1367202 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33911 event pairs, 687 based on Foata normal form. 2/5881 useless extension candidates. Maximal degree in co-relation 71602. Up to 5473 conditions per place. [2024-06-28 03:19:08,668 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 642 selfloop transitions, 28 changer transitions 0/700 dead transitions. [2024-06-28 03:19:08,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 700 transitions, 12857 flow [2024-06-28 03:19:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:19:08,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-28 03:19:08,669 INFO L175 Difference]: Start difference. First operand has 401 places, 678 transitions, 11375 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:19:08,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 700 transitions, 12857 flow [2024-06-28 03:19:14,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 700 transitions, 12318 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-28 03:19:14,228 INFO L231 Difference]: Finished difference. Result has 400 places, 680 transitions, 10977 flow [2024-06-28 03:19:14,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10836, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10977, PETRI_PLACES=400, PETRI_TRANSITIONS=680} [2024-06-28 03:19:14,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-28 03:19:14,228 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 680 transitions, 10977 flow [2024-06-28 03:19:14,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:14,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:14,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:14,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 03:19:14,229 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)] === [2024-06-28 03:19:14,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1274582870, now seen corresponding path program 2 times [2024-06-28 03:19:14,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:14,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919370952] [2024-06-28 03:19:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:14,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:15,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:15,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919370952] [2024-06-28 03:19:15,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919370952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:15,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:15,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:19:15,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153717185] [2024-06-28 03:19:15,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:15,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:19:15,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:15,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:19:15,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:19:15,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:19:15,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 680 transitions, 10977 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:15,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:15,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:19:15,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:16,845 INFO L124 PetriNetUnfolderBase]: 3819/5894 cut-off events. [2024-06-28 03:19:16,845 INFO L125 PetriNetUnfolderBase]: For 1385039/1385041 co-relation queries the response was YES. [2024-06-28 03:19:16,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71449 conditions, 5894 events. 3819/5894 cut-off events. For 1385039/1385041 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33989 event pairs, 717 based on Foata normal form. 2/5889 useless extension candidates. Maximal degree in co-relation 71253. Up to 5485 conditions per place. [2024-06-28 03:19:16,948 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 634 selfloop transitions, 35 changer transitions 0/699 dead transitions. [2024-06-28 03:19:16,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 699 transitions, 12451 flow [2024-06-28 03:19:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:19:16,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 03:19:16,950 INFO L175 Difference]: Start difference. First operand has 400 places, 680 transitions, 10977 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:19:16,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 699 transitions, 12451 flow [2024-06-28 03:19:21,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 699 transitions, 12326 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:21,790 INFO L231 Difference]: Finished difference. Result has 402 places, 682 transitions, 11013 flow [2024-06-28 03:19:21,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10852, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11013, PETRI_PLACES=402, PETRI_TRANSITIONS=682} [2024-06-28 03:19:21,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-28 03:19:21,791 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 682 transitions, 11013 flow [2024-06-28 03:19:21,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:21,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:21,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:21,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 03:19:21,792 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)] === [2024-06-28 03:19:21,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash 708520082, now seen corresponding path program 1 times [2024-06-28 03:19:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:21,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017306860] [2024-06-28 03:19:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:21,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:22,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017306860] [2024-06-28 03:19:22,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017306860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:22,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:22,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:22,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957065367] [2024-06-28 03:19:22,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:22,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:22,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:22,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:19:22,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 682 transitions, 11013 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:22,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:22,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:19:22,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:24,439 INFO L124 PetriNetUnfolderBase]: 3813/5888 cut-off events. [2024-06-28 03:19:24,439 INFO L125 PetriNetUnfolderBase]: For 1394676/1394678 co-relation queries the response was YES. [2024-06-28 03:19:24,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71316 conditions, 5888 events. 3813/5888 cut-off events. For 1394676/1394678 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 33946 event pairs, 715 based on Foata normal form. 2/5885 useless extension candidates. Maximal degree in co-relation 71119. Up to 5473 conditions per place. [2024-06-28 03:19:24,543 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 633 selfloop transitions, 39 changer transitions 0/702 dead transitions. [2024-06-28 03:19:24,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 702 transitions, 12501 flow [2024-06-28 03:19:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:24,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:19:24,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-28 03:19:24,544 INFO L175 Difference]: Start difference. First operand has 402 places, 682 transitions, 11013 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:19:24,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 702 transitions, 12501 flow [2024-06-28 03:19:29,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 702 transitions, 12360 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:29,432 INFO L231 Difference]: Finished difference. Result has 404 places, 685 transitions, 11051 flow [2024-06-28 03:19:29,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10872, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11051, PETRI_PLACES=404, PETRI_TRANSITIONS=685} [2024-06-28 03:19:29,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-28 03:19:29,433 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 685 transitions, 11051 flow [2024-06-28 03:19:29,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:29,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:29,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:29,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 03:19:29,433 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)] === [2024-06-28 03:19:29,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1159176380, now seen corresponding path program 3 times [2024-06-28 03:19:29,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:29,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176577448] [2024-06-28 03:19:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:29,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:30,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:30,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176577448] [2024-06-28 03:19:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176577448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:30,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:30,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:30,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4082698] [2024-06-28 03:19:30,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:30,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:30,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:19:30,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 685 transitions, 11051 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:30,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:30,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:19:30,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:31,967 INFO L124 PetriNetUnfolderBase]: 3821/5896 cut-off events. [2024-06-28 03:19:31,967 INFO L125 PetriNetUnfolderBase]: For 1415479/1415481 co-relation queries the response was YES. [2024-06-28 03:19:32,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71634 conditions, 5896 events. 3821/5896 cut-off events. For 1415479/1415481 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33993 event pairs, 713 based on Foata normal form. 2/5889 useless extension candidates. Maximal degree in co-relation 71436. Up to 5483 conditions per place. [2024-06-28 03:19:32,069 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 633 selfloop transitions, 39 changer transitions 0/702 dead transitions. [2024-06-28 03:19:32,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 702 transitions, 12529 flow [2024-06-28 03:19:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:32,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:19:32,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-28 03:19:32,070 INFO L175 Difference]: Start difference. First operand has 404 places, 685 transitions, 11051 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:19:32,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 702 transitions, 12529 flow [2024-06-28 03:19:38,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 702 transitions, 12394 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:38,277 INFO L231 Difference]: Finished difference. Result has 406 places, 687 transitions, 11087 flow [2024-06-28 03:19:38,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10916, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11087, PETRI_PLACES=406, PETRI_TRANSITIONS=687} [2024-06-28 03:19:38,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-28 03:19:38,277 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 687 transitions, 11087 flow [2024-06-28 03:19:38,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:38,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:38,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:38,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 03:19:38,278 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)] === [2024-06-28 03:19:38,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1643279618, now seen corresponding path program 4 times [2024-06-28 03:19:38,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:38,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362687878] [2024-06-28 03:19:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:38,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:39,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:39,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362687878] [2024-06-28 03:19:39,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362687878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:39,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:39,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:39,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771225114] [2024-06-28 03:19:39,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:39,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:39,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:39,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-28 03:19:39,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 687 transitions, 11087 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:39,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:39,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-28 03:19:39,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:40,915 INFO L124 PetriNetUnfolderBase]: 3816/5888 cut-off events. [2024-06-28 03:19:40,915 INFO L125 PetriNetUnfolderBase]: For 1416190/1416196 co-relation queries the response was YES. [2024-06-28 03:19:40,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71531 conditions, 5888 events. 3816/5888 cut-off events. For 1416190/1416196 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33884 event pairs, 717 based on Foata normal form. 2/5879 useless extension candidates. Maximal degree in co-relation 71332. Up to 5464 conditions per place. [2024-06-28 03:19:41,027 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 626 selfloop transitions, 46 changer transitions 0/702 dead transitions. [2024-06-28 03:19:41,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 702 transitions, 12563 flow [2024-06-28 03:19:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:19:41,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-28 03:19:41,028 INFO L175 Difference]: Start difference. First operand has 406 places, 687 transitions, 11087 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:19:41,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 702 transitions, 12563 flow [2024-06-28 03:19:46,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 702 transitions, 12408 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:46,379 INFO L231 Difference]: Finished difference. Result has 408 places, 689 transitions, 11121 flow [2024-06-28 03:19:46,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10932, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11121, PETRI_PLACES=408, PETRI_TRANSITIONS=689} [2024-06-28 03:19:46,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-28 03:19:46,379 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 689 transitions, 11121 flow [2024-06-28 03:19:46,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:46,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:46,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:46,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 03:19:46,380 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)] === [2024-06-28 03:19:46,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:46,381 INFO L85 PathProgramCache]: Analyzing trace with hash -129515066, now seen corresponding path program 1 times [2024-06-28 03:19:46,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:46,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067699445] [2024-06-28 03:19:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:46,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:47,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067699445] [2024-06-28 03:19:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067699445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:47,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:47,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:47,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412593304] [2024-06-28 03:19:47,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:47,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:47,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:47,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:19:47,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 689 transitions, 11121 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:47,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:47,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:19:47,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:49,223 INFO L124 PetriNetUnfolderBase]: 3976/6081 cut-off events. [2024-06-28 03:19:49,223 INFO L125 PetriNetUnfolderBase]: For 1451439/1451449 co-relation queries the response was YES. [2024-06-28 03:19:49,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72891 conditions, 6081 events. 3976/6081 cut-off events. For 1451439/1451449 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34499 event pairs, 503 based on Foata normal form. 14/6094 useless extension candidates. Maximal degree in co-relation 72691. Up to 5622 conditions per place. [2024-06-28 03:19:49,320 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 662 selfloop transitions, 59 changer transitions 0/725 dead transitions. [2024-06-28 03:19:49,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 725 transitions, 12853 flow [2024-06-28 03:19:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:19:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:19:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 03:19:49,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-28 03:19:49,321 INFO L175 Difference]: Start difference. First operand has 408 places, 689 transitions, 11121 flow. Second operand 9 states and 151 transitions. [2024-06-28 03:19:49,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 725 transitions, 12853 flow [2024-06-28 03:19:54,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 725 transitions, 12680 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:54,549 INFO L231 Difference]: Finished difference. Result has 411 places, 692 transitions, 11226 flow [2024-06-28 03:19:54,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10948, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11226, PETRI_PLACES=411, PETRI_TRANSITIONS=692} [2024-06-28 03:19:54,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-28 03:19:54,550 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 692 transitions, 11226 flow [2024-06-28 03:19:54,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:54,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:54,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:54,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 03:19:54,550 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)] === [2024-06-28 03:19:54,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1495835032, now seen corresponding path program 2 times [2024-06-28 03:19:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:54,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389944467] [2024-06-28 03:19:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:55,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:55,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389944467] [2024-06-28 03:19:55,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389944467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:55,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:55,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:55,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629546862] [2024-06-28 03:19:55,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:55,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:55,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:19:55,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 692 transitions, 11226 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:55,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:55,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:19:55,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:57,268 INFO L124 PetriNetUnfolderBase]: 3992/6105 cut-off events. [2024-06-28 03:19:57,269 INFO L125 PetriNetUnfolderBase]: For 1476831/1476841 co-relation queries the response was YES. [2024-06-28 03:19:57,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73659 conditions, 6105 events. 3992/6105 cut-off events. For 1476831/1476841 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34730 event pairs, 623 based on Foata normal form. 14/6118 useless extension candidates. Maximal degree in co-relation 73458. Up to 5699 conditions per place. [2024-06-28 03:19:57,371 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 652 selfloop transitions, 67 changer transitions 0/723 dead transitions. [2024-06-28 03:19:57,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 723 transitions, 12942 flow [2024-06-28 03:19:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:19:57,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:19:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 03:19:57,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-28 03:19:57,372 INFO L175 Difference]: Start difference. First operand has 411 places, 692 transitions, 11226 flow. Second operand 9 states and 148 transitions. [2024-06-28 03:19:57,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 723 transitions, 12942 flow [2024-06-28 03:20:04,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 723 transitions, 12686 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-28 03:20:04,120 INFO L231 Difference]: Finished difference. Result has 413 places, 695 transitions, 11270 flow [2024-06-28 03:20:04,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10970, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11270, PETRI_PLACES=413, PETRI_TRANSITIONS=695} [2024-06-28 03:20:04,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-28 03:20:04,121 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 695 transitions, 11270 flow [2024-06-28 03:20:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:04,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:04,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 03:20:04,121 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)] === [2024-06-28 03:20:04,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1496161462, now seen corresponding path program 3 times [2024-06-28 03:20:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:04,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069921285] [2024-06-28 03:20:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:04,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:04,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069921285] [2024-06-28 03:20:04,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069921285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:04,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:04,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:20:04,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358689301] [2024-06-28 03:20:04,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:04,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:20:04,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:20:04,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:20:05,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:05,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 695 transitions, 11270 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:05,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:05,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:05,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:06,829 INFO L124 PetriNetUnfolderBase]: 4008/6129 cut-off events. [2024-06-28 03:20:06,830 INFO L125 PetriNetUnfolderBase]: For 1501496/1501506 co-relation queries the response was YES. [2024-06-28 03:20:06,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74149 conditions, 6129 events. 4008/6129 cut-off events. For 1501496/1501506 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34891 event pairs, 624 based on Foata normal form. 14/6142 useless extension candidates. Maximal degree in co-relation 73947. Up to 5713 conditions per place. [2024-06-28 03:20:06,952 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 657 selfloop transitions, 66 changer transitions 0/727 dead transitions. [2024-06-28 03:20:06,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 727 transitions, 13002 flow [2024-06-28 03:20:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:20:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:20:06,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 03:20:06,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-28 03:20:06,953 INFO L175 Difference]: Start difference. First operand has 413 places, 695 transitions, 11270 flow. Second operand 9 states and 148 transitions. [2024-06-28 03:20:06,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 727 transitions, 13002 flow [2024-06-28 03:20:12,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 727 transitions, 12724 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-28 03:20:12,502 INFO L231 Difference]: Finished difference. Result has 415 places, 698 transitions, 11296 flow [2024-06-28 03:20:12,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10992, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11296, PETRI_PLACES=415, PETRI_TRANSITIONS=698} [2024-06-28 03:20:12,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-28 03:20:12,502 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 698 transitions, 11296 flow [2024-06-28 03:20:12,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:12,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:12,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:12,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 03:20:12,503 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)] === [2024-06-28 03:20:12,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:12,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1495823128, now seen corresponding path program 1 times [2024-06-28 03:20:12,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:12,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264886687] [2024-06-28 03:20:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:12,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:13,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:13,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264886687] [2024-06-28 03:20:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264886687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:13,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:20:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370755203] [2024-06-28 03:20:13,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:13,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:20:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:20:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:20:13,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:13,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 698 transitions, 11296 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-28 03:20:13,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:13,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:13,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:15,536 INFO L124 PetriNetUnfolderBase]: 4018/6143 cut-off events. [2024-06-28 03:20:15,537 INFO L125 PetriNetUnfolderBase]: For 1506685/1506695 co-relation queries the response was YES. [2024-06-28 03:20:15,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74461 conditions, 6143 events. 4018/6143 cut-off events. For 1506685/1506695 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34965 event pairs, 625 based on Foata normal form. 12/6154 useless extension candidates. Maximal degree in co-relation 74258. Up to 5737 conditions per place. [2024-06-28 03:20:15,645 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 654 selfloop transitions, 72 changer transitions 0/730 dead transitions. [2024-06-28 03:20:15,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 730 transitions, 13036 flow [2024-06-28 03:20:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:20:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:20:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-28 03:20:15,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926829268292683 [2024-06-28 03:20:15,646 INFO L175 Difference]: Start difference. First operand has 415 places, 698 transitions, 11296 flow. Second operand 10 states and 161 transitions. [2024-06-28 03:20:15,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 730 transitions, 13036 flow [2024-06-28 03:20:21,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 730 transitions, 12754 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-28 03:20:21,311 INFO L231 Difference]: Finished difference. Result has 418 places, 702 transitions, 11337 flow [2024-06-28 03:20:21,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11014, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11337, PETRI_PLACES=418, PETRI_TRANSITIONS=702} [2024-06-28 03:20:21,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-28 03:20:21,312 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 702 transitions, 11337 flow [2024-06-28 03:20:21,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-28 03:20:21,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:21,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:21,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 03:20:21,315 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)] === [2024-06-28 03:20:21,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:21,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1906067768, now seen corresponding path program 1 times [2024-06-28 03:20:21,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:21,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135869824] [2024-06-28 03:20:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:21,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:21,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:21,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135869824] [2024-06-28 03:20:21,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135869824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:21,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:21,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:21,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555264443] [2024-06-28 03:20:21,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:21,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:21,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:21,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:21,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 702 transitions, 11337 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:21,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:21,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:21,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:23,925 INFO L124 PetriNetUnfolderBase]: 4048/6179 cut-off events. [2024-06-28 03:20:23,925 INFO L125 PetriNetUnfolderBase]: For 1559100/1559106 co-relation queries the response was YES. [2024-06-28 03:20:24,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74964 conditions, 6179 events. 4048/6179 cut-off events. For 1559100/1559106 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35100 event pairs, 628 based on Foata normal form. 6/6184 useless extension candidates. Maximal degree in co-relation 74760. Up to 5378 conditions per place. [2024-06-28 03:20:24,028 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 596 selfloop transitions, 152 changer transitions 0/752 dead transitions. [2024-06-28 03:20:24,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 752 transitions, 13467 flow [2024-06-28 03:20:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:20:24,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 03:20:24,032 INFO L175 Difference]: Start difference. First operand has 418 places, 702 transitions, 11337 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:20:24,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 752 transitions, 13467 flow [2024-06-28 03:20:29,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 752 transitions, 13184 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-28 03:20:29,041 INFO L231 Difference]: Finished difference. Result has 420 places, 725 transitions, 11963 flow [2024-06-28 03:20:29,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11054, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11963, PETRI_PLACES=420, PETRI_TRANSITIONS=725} [2024-06-28 03:20:29,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-28 03:20:29,043 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 725 transitions, 11963 flow [2024-06-28 03:20:29,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:29,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:29,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:29,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 03:20:29,045 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)] === [2024-06-28 03:20:29,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:29,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1906276305, now seen corresponding path program 1 times [2024-06-28 03:20:29,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:29,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262015771] [2024-06-28 03:20:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:29,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:29,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:29,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262015771] [2024-06-28 03:20:29,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262015771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:29,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:29,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:20:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944439539] [2024-06-28 03:20:29,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:29,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:20:29,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:20:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:20:29,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:29,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 725 transitions, 11963 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:29,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:29,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:29,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:31,779 INFO L124 PetriNetUnfolderBase]: 4036/6159 cut-off events. [2024-06-28 03:20:31,780 INFO L125 PetriNetUnfolderBase]: For 1536033/1536039 co-relation queries the response was YES. [2024-06-28 03:20:31,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75494 conditions, 6159 events. 4036/6159 cut-off events. For 1536033/1536039 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 34919 event pairs, 654 based on Foata normal form. 6/6164 useless extension candidates. Maximal degree in co-relation 75287. Up to 5316 conditions per place. [2024-06-28 03:20:31,886 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 587 selfloop transitions, 160 changer transitions 0/751 dead transitions. [2024-06-28 03:20:31,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 751 transitions, 13623 flow [2024-06-28 03:20:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:20:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:20:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:20:31,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 03:20:31,888 INFO L175 Difference]: Start difference. First operand has 420 places, 725 transitions, 11963 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:20:31,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 751 transitions, 13623 flow [2024-06-28 03:20:37,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 751 transitions, 13265 flow, removed 110 selfloop flow, removed 3 redundant places. [2024-06-28 03:20:37,251 INFO L231 Difference]: Finished difference. Result has 426 places, 726 transitions, 11996 flow [2024-06-28 03:20:37,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11611, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11996, PETRI_PLACES=426, PETRI_TRANSITIONS=726} [2024-06-28 03:20:37,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-28 03:20:37,253 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 726 transitions, 11996 flow [2024-06-28 03:20:37,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:37,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:37,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:37,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 03:20:37,253 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)] === [2024-06-28 03:20:37,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:37,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1899571522, now seen corresponding path program 2 times [2024-06-28 03:20:37,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:37,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630087243] [2024-06-28 03:20:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:37,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:37,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:37,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630087243] [2024-06-28 03:20:37,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630087243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:37,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:37,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:20:37,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275583452] [2024-06-28 03:20:37,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:37,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:20:37,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:37,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:20:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:20:37,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:37,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 726 transitions, 11996 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:37,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:37,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:37,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:39,849 INFO L124 PetriNetUnfolderBase]: 4114/6286 cut-off events. [2024-06-28 03:20:39,850 INFO L125 PetriNetUnfolderBase]: For 1629578/1629584 co-relation queries the response was YES. [2024-06-28 03:20:39,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77880 conditions, 6286 events. 4114/6286 cut-off events. For 1629578/1629584 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 35995 event pairs, 627 based on Foata normal form. 6/6291 useless extension candidates. Maximal degree in co-relation 77672. Up to 5311 conditions per place. [2024-06-28 03:20:39,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 575 selfloop transitions, 190 changer transitions 0/769 dead transitions. [2024-06-28 03:20:39,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 769 transitions, 14510 flow [2024-06-28 03:20:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:20:39,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 03:20:39,967 INFO L175 Difference]: Start difference. First operand has 426 places, 726 transitions, 11996 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:20:39,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 769 transitions, 14510 flow [2024-06-28 03:20:46,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 769 transitions, 14080 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-28 03:20:46,577 INFO L231 Difference]: Finished difference. Result has 427 places, 744 transitions, 12589 flow [2024-06-28 03:20:46,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11566, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12589, PETRI_PLACES=427, PETRI_TRANSITIONS=744} [2024-06-28 03:20:46,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-28 03:20:46,583 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 744 transitions, 12589 flow [2024-06-28 03:20:46,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:46,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:46,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:46,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 03:20:46,584 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)] === [2024-06-28 03:20:46,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:46,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1905232432, now seen corresponding path program 3 times [2024-06-28 03:20:46,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:46,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11167708] [2024-06-28 03:20:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:47,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:47,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11167708] [2024-06-28 03:20:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11167708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:47,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:20:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361726269] [2024-06-28 03:20:47,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:47,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:20:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:47,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:20:47,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:20:47,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:47,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 744 transitions, 12589 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:47,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:47,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:47,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:49,117 INFO L124 PetriNetUnfolderBase]: 4102/6261 cut-off events. [2024-06-28 03:20:49,118 INFO L125 PetriNetUnfolderBase]: For 1608278/1608286 co-relation queries the response was YES. [2024-06-28 03:20:49,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77423 conditions, 6261 events. 4102/6261 cut-off events. For 1608278/1608286 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35637 event pairs, 664 based on Foata normal form. 8/6268 useless extension candidates. Maximal degree in co-relation 77214. Up to 5460 conditions per place. [2024-06-28 03:20:49,230 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 620 selfloop transitions, 147 changer transitions 0/771 dead transitions. [2024-06-28 03:20:49,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 771 transitions, 14267 flow [2024-06-28 03:20:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:20:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:20:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:20:49,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-28 03:20:49,231 INFO L175 Difference]: Start difference. First operand has 427 places, 744 transitions, 12589 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:20:49,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 771 transitions, 14267 flow [2024-06-28 03:20:54,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 771 transitions, 13853 flow, removed 124 selfloop flow, removed 4 redundant places. [2024-06-28 03:20:54,938 INFO L231 Difference]: Finished difference. Result has 435 places, 747 transitions, 12641 flow [2024-06-28 03:20:54,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12181, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12641, PETRI_PLACES=435, PETRI_TRANSITIONS=747} [2024-06-28 03:20:54,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-28 03:20:54,950 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 747 transitions, 12641 flow [2024-06-28 03:20:54,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:54,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:54,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:54,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 03:20:54,951 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)] === [2024-06-28 03:20:54,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash -11185214, now seen corresponding path program 1 times [2024-06-28 03:20:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:54,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807874427] [2024-06-28 03:20:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:55,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:55,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807874427] [2024-06-28 03:20:55,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807874427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:55,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:55,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:20:55,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159591318] [2024-06-28 03:20:55,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:55,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:20:55,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:20:55,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:20:55,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:20:55,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 747 transitions, 12641 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:55,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:55,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:20:55,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:58,001 INFO L124 PetriNetUnfolderBase]: 4122/6279 cut-off events. [2024-06-28 03:20:58,001 INFO L125 PetriNetUnfolderBase]: For 1629311/1629317 co-relation queries the response was YES. [2024-06-28 03:20:58,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78317 conditions, 6279 events. 4122/6279 cut-off events. For 1629311/1629317 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 35628 event pairs, 645 based on Foata normal form. 6/6284 useless extension candidates. Maximal degree in co-relation 78103. Up to 5412 conditions per place. [2024-06-28 03:20:58,103 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 611 selfloop transitions, 160 changer transitions 0/775 dead transitions. [2024-06-28 03:20:58,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 775 transitions, 14424 flow [2024-06-28 03:20:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:20:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:20:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-28 03:20:58,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-28 03:20:58,104 INFO L175 Difference]: Start difference. First operand has 435 places, 747 transitions, 12641 flow. Second operand 10 states and 166 transitions. [2024-06-28 03:20:58,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 775 transitions, 14424 flow [2024-06-28 03:21:03,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 775 transitions, 14117 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-28 03:21:03,773 INFO L231 Difference]: Finished difference. Result has 441 places, 751 transitions, 12804 flow [2024-06-28 03:21:03,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12334, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12804, PETRI_PLACES=441, PETRI_TRANSITIONS=751} [2024-06-28 03:21:03,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-28 03:21:03,789 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 751 transitions, 12804 flow [2024-06-28 03:21:03,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:03,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:03,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:03,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 03:21:03,789 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)] === [2024-06-28 03:21:03,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:03,790 INFO L85 PathProgramCache]: Analyzing trace with hash -756066644, now seen corresponding path program 4 times [2024-06-28 03:21:03,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:03,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042675096] [2024-06-28 03:21:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:03,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:04,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:04,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042675096] [2024-06-28 03:21:04,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042675096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:04,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:04,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:04,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549368512] [2024-06-28 03:21:04,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:04,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:04,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:04,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:04,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:21:04,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 751 transitions, 12804 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:04,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:04,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:21:04,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:06,444 INFO L124 PetriNetUnfolderBase]: 4192/6405 cut-off events. [2024-06-28 03:21:06,444 INFO L125 PetriNetUnfolderBase]: For 1722610/1722620 co-relation queries the response was YES. [2024-06-28 03:21:06,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81099 conditions, 6405 events. 4192/6405 cut-off events. For 1722610/1722620 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36629 event pairs, 638 based on Foata normal form. 12/6416 useless extension candidates. Maximal degree in co-relation 80884. Up to 5486 conditions per place. [2024-06-28 03:21:06,562 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 598 selfloop transitions, 193 changer transitions 0/795 dead transitions. [2024-06-28 03:21:06,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 795 transitions, 15412 flow [2024-06-28 03:21:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:06,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:21:06,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-28 03:21:06,563 INFO L175 Difference]: Start difference. First operand has 441 places, 751 transitions, 12804 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:21:06,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 795 transitions, 15412 flow [2024-06-28 03:21:14,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 795 transitions, 14993 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:14,277 INFO L231 Difference]: Finished difference. Result has 442 places, 769 transitions, 13447 flow [2024-06-28 03:21:14,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12387, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13447, PETRI_PLACES=442, PETRI_TRANSITIONS=769} [2024-06-28 03:21:14,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-28 03:21:14,278 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 769 transitions, 13447 flow [2024-06-28 03:21:14,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:14,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:14,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:14,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 03:21:14,279 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)] === [2024-06-28 03:21:14,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash -755737765, now seen corresponding path program 1 times [2024-06-28 03:21:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:14,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951719597] [2024-06-28 03:21:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:15,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:15,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951719597] [2024-06-28 03:21:15,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951719597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:15,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:15,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607451527] [2024-06-28 03:21:15,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:15,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:15,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:15,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:15,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:21:15,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 769 transitions, 13447 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:15,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:15,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:21:15,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:17,032 INFO L124 PetriNetUnfolderBase]: 4212/6425 cut-off events. [2024-06-28 03:21:17,032 INFO L125 PetriNetUnfolderBase]: For 1731950/1731956 co-relation queries the response was YES. [2024-06-28 03:21:17,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81637 conditions, 6425 events. 4212/6425 cut-off events. For 1731950/1731956 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 36715 event pairs, 623 based on Foata normal form. 8/6432 useless extension candidates. Maximal degree in co-relation 81421. Up to 6000 conditions per place. [2024-06-28 03:21:17,152 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 724 selfloop transitions, 71 changer transitions 0/799 dead transitions. [2024-06-28 03:21:17,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 799 transitions, 15365 flow [2024-06-28 03:21:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 03:21:17,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-28 03:21:17,154 INFO L175 Difference]: Start difference. First operand has 442 places, 769 transitions, 13447 flow. Second operand 9 states and 146 transitions. [2024-06-28 03:21:17,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 799 transitions, 15365 flow [2024-06-28 03:21:22,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 799 transitions, 14897 flow, removed 142 selfloop flow, removed 4 redundant places. [2024-06-28 03:21:22,101 INFO L231 Difference]: Finished difference. Result has 447 places, 776 transitions, 13356 flow [2024-06-28 03:21:22,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12979, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13356, PETRI_PLACES=447, PETRI_TRANSITIONS=776} [2024-06-28 03:21:22,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-28 03:21:22,102 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 776 transitions, 13356 flow [2024-06-28 03:21:22,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:22,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:22,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:22,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 03:21:22,103 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)] === [2024-06-28 03:21:22,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash -223133956, now seen corresponding path program 2 times [2024-06-28 03:21:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:22,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73577548] [2024-06-28 03:21:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:22,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:22,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:22,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73577548] [2024-06-28 03:21:22,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73577548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:22,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:22,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:22,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726397043] [2024-06-28 03:21:22,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:22,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:22,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:22,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:21:22,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 776 transitions, 13356 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:22,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:22,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:21:22,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:25,151 INFO L124 PetriNetUnfolderBase]: 4232/6454 cut-off events. [2024-06-28 03:21:25,152 INFO L125 PetriNetUnfolderBase]: For 1755235/1755241 co-relation queries the response was YES. [2024-06-28 03:21:25,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81878 conditions, 6454 events. 4232/6454 cut-off events. For 1755235/1755241 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 36939 event pairs, 623 based on Foata normal form. 8/6461 useless extension candidates. Maximal degree in co-relation 81660. Up to 6028 conditions per place. [2024-06-28 03:21:25,264 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 731 selfloop transitions, 68 changer transitions 0/803 dead transitions. [2024-06-28 03:21:25,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 803 transitions, 15194 flow [2024-06-28 03:21:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 03:21:25,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-28 03:21:25,265 INFO L175 Difference]: Start difference. First operand has 447 places, 776 transitions, 13356 flow. Second operand 9 states and 146 transitions. [2024-06-28 03:21:25,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 803 transitions, 15194 flow [2024-06-28 03:21:31,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 803 transitions, 14930 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:31,173 INFO L231 Difference]: Finished difference. Result has 449 places, 780 transitions, 13383 flow [2024-06-28 03:21:31,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13092, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13383, PETRI_PLACES=449, PETRI_TRANSITIONS=780} [2024-06-28 03:21:31,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-28 03:21:31,174 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 780 transitions, 13383 flow [2024-06-28 03:21:31,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:31,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:31,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:31,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 03:21:31,174 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)] === [2024-06-28 03:21:31,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1910085368, now seen corresponding path program 5 times [2024-06-28 03:21:31,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:31,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093274143] [2024-06-28 03:21:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:31,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:31,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:31,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093274143] [2024-06-28 03:21:31,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093274143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:31,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:31,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:31,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530398127] [2024-06-28 03:21:31,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:31,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:31,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:31,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:21:31,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 780 transitions, 13383 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:31,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:31,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:21:31,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:33,838 INFO L124 PetriNetUnfolderBase]: 4302/6555 cut-off events. [2024-06-28 03:21:33,838 INFO L125 PetriNetUnfolderBase]: For 1853598/1853604 co-relation queries the response was YES. [2024-06-28 03:21:33,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84553 conditions, 6555 events. 4302/6555 cut-off events. For 1853598/1853604 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 37495 event pairs, 673 based on Foata normal form. 6/6560 useless extension candidates. Maximal degree in co-relation 84334. Up to 5170 conditions per place. [2024-06-28 03:21:33,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 521 selfloop transitions, 294 changer transitions 0/819 dead transitions. [2024-06-28 03:21:33,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 819 transitions, 16319 flow [2024-06-28 03:21:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:21:33,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-28 03:21:33,967 INFO L175 Difference]: Start difference. First operand has 449 places, 780 transitions, 13383 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:21:33,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 819 transitions, 16319 flow [2024-06-28 03:21:39,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 819 transitions, 16056 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:39,855 INFO L231 Difference]: Finished difference. Result has 450 places, 798 transitions, 14404 flow [2024-06-28 03:21:39,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13120, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14404, PETRI_PLACES=450, PETRI_TRANSITIONS=798} [2024-06-28 03:21:39,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-28 03:21:39,856 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 798 transitions, 14404 flow [2024-06-28 03:21:39,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:39,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:39,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:39,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 03:21:39,856 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)] === [2024-06-28 03:21:39,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1910085740, now seen corresponding path program 3 times [2024-06-28 03:21:39,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:39,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68435394] [2024-06-28 03:21:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:39,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:40,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:40,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68435394] [2024-06-28 03:21:40,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68435394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:40,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:40,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:40,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525861496] [2024-06-28 03:21:40,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:40,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:40,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:40,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:40,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:21:40,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 798 transitions, 14404 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:40,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:40,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:21:40,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:42,988 INFO L124 PetriNetUnfolderBase]: 4354/6612 cut-off events. [2024-06-28 03:21:42,988 INFO L125 PetriNetUnfolderBase]: For 1905784/1905790 co-relation queries the response was YES. [2024-06-28 03:21:43,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86860 conditions, 6612 events. 4354/6612 cut-off events. For 1905784/1905790 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 37696 event pairs, 644 based on Foata normal form. 4/6615 useless extension candidates. Maximal degree in co-relation 86640. Up to 5514 conditions per place. [2024-06-28 03:21:43,115 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 622 selfloop transitions, 203 changer transitions 0/829 dead transitions. [2024-06-28 03:21:43,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 829 transitions, 16718 flow [2024-06-28 03:21:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:21:43,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-28 03:21:43,116 INFO L175 Difference]: Start difference. First operand has 450 places, 798 transitions, 14404 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:21:43,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 829 transitions, 16718 flow [2024-06-28 03:21:50,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 829 transitions, 16061 flow, removed 151 selfloop flow, removed 4 redundant places. [2024-06-28 03:21:50,094 INFO L231 Difference]: Finished difference. Result has 455 places, 806 transitions, 14466 flow [2024-06-28 03:21:50,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13747, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14466, PETRI_PLACES=455, PETRI_TRANSITIONS=806} [2024-06-28 03:21:50,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-28 03:21:50,095 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 806 transitions, 14466 flow [2024-06-28 03:21:50,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:50,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:50,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:50,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 03:21:50,095 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)] === [2024-06-28 03:21:50,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1910079788, now seen corresponding path program 6 times [2024-06-28 03:21:50,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:50,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829109159] [2024-06-28 03:21:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:50,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:50,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829109159] [2024-06-28 03:21:50,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829109159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:50,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:50,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:50,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403762756] [2024-06-28 03:21:50,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:50,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:50,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:50,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:50,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:21:50,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 806 transitions, 14466 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:50,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:50,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:21:50,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:53,281 INFO L124 PetriNetUnfolderBase]: 4336/6604 cut-off events. [2024-06-28 03:21:53,281 INFO L125 PetriNetUnfolderBase]: For 1897162/1897168 co-relation queries the response was YES. [2024-06-28 03:21:53,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85754 conditions, 6604 events. 4336/6604 cut-off events. For 1897162/1897168 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37824 event pairs, 665 based on Foata normal form. 6/6609 useless extension candidates. Maximal degree in co-relation 85533. Up to 5227 conditions per place. [2024-06-28 03:21:53,403 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 516 selfloop transitions, 307 changer transitions 0/827 dead transitions. [2024-06-28 03:21:53,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 827 transitions, 16746 flow [2024-06-28 03:21:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 03:21:53,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-28 03:21:53,404 INFO L175 Difference]: Start difference. First operand has 455 places, 806 transitions, 14466 flow. Second operand 8 states and 140 transitions. [2024-06-28 03:21:53,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 827 transitions, 16746 flow [2024-06-28 03:22:02,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 827 transitions, 16208 flow, removed 173 selfloop flow, removed 5 redundant places. [2024-06-28 03:22:02,182 INFO L231 Difference]: Finished difference. Result has 458 places, 806 transitions, 14554 flow [2024-06-28 03:22:02,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13928, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14554, PETRI_PLACES=458, PETRI_TRANSITIONS=806} [2024-06-28 03:22:02,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-28 03:22:02,183 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 806 transitions, 14554 flow [2024-06-28 03:22:02,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:02,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:02,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:02,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 03:22:02,183 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)] === [2024-06-28 03:22:02,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1181414285, now seen corresponding path program 2 times [2024-06-28 03:22:02,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:02,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934241617] [2024-06-28 03:22:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:02,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:03,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:03,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934241617] [2024-06-28 03:22:03,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934241617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:03,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806963284] [2024-06-28 03:22:03,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:03,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:03,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:03,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:22:03,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 806 transitions, 14554 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:03,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:03,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:22:03,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:05,167 INFO L124 PetriNetUnfolderBase]: 4388/6679 cut-off events. [2024-06-28 03:22:05,168 INFO L125 PetriNetUnfolderBase]: For 1936646/1936652 co-relation queries the response was YES. [2024-06-28 03:22:05,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87949 conditions, 6679 events. 4388/6679 cut-off events. For 1936646/1936652 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 38328 event pairs, 634 based on Foata normal form. 8/6686 useless extension candidates. Maximal degree in co-relation 87726. Up to 5946 conditions per place. [2024-06-28 03:22:05,298 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 697 selfloop transitions, 144 changer transitions 0/845 dead transitions. [2024-06-28 03:22:05,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 845 transitions, 17466 flow [2024-06-28 03:22:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:22:05,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:22:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 03:22:05,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-28 03:22:05,299 INFO L175 Difference]: Start difference. First operand has 458 places, 806 transitions, 14554 flow. Second operand 9 states and 151 transitions. [2024-06-28 03:22:05,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 845 transitions, 17466 flow [2024-06-28 03:22:11,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 845 transitions, 16367 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-28 03:22:11,986 INFO L231 Difference]: Finished difference. Result has 459 places, 821 transitions, 14374 flow [2024-06-28 03:22:11,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13455, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14374, PETRI_PLACES=459, PETRI_TRANSITIONS=821} [2024-06-28 03:22:11,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-28 03:22:11,987 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 821 transitions, 14374 flow [2024-06-28 03:22:11,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:11,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:11,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:11,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 03:22:11,988 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)] === [2024-06-28 03:22:11,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1181414502, now seen corresponding path program 4 times [2024-06-28 03:22:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:11,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874372714] [2024-06-28 03:22:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:11,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:12,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874372714] [2024-06-28 03:22:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874372714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:12,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458372530] [2024-06-28 03:22:12,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:12,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:12,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:22:12,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 821 transitions, 14374 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:12,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:12,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:22:12,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:15,073 INFO L124 PetriNetUnfolderBase]: 4440/6751 cut-off events. [2024-06-28 03:22:15,073 INFO L125 PetriNetUnfolderBase]: For 2005589/2005595 co-relation queries the response was YES. [2024-06-28 03:22:15,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87585 conditions, 6751 events. 4440/6751 cut-off events. For 2005589/2005595 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 38764 event pairs, 640 based on Foata normal form. 8/6758 useless extension candidates. Maximal degree in co-relation 87363. Up to 6104 conditions per place. [2024-06-28 03:22:15,198 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 741 selfloop transitions, 107 changer transitions 0/852 dead transitions. [2024-06-28 03:22:15,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 852 transitions, 16762 flow [2024-06-28 03:22:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:22:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:22:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-28 03:22:15,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-28 03:22:15,199 INFO L175 Difference]: Start difference. First operand has 459 places, 821 transitions, 14374 flow. Second operand 9 states and 148 transitions. [2024-06-28 03:22:15,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 852 transitions, 16762 flow [2024-06-28 03:22:23,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 852 transitions, 16423 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-28 03:22:23,759 INFO L231 Difference]: Finished difference. Result has 463 places, 828 transitions, 14518 flow [2024-06-28 03:22:23,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14035, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14518, PETRI_PLACES=463, PETRI_TRANSITIONS=828} [2024-06-28 03:22:23,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-28 03:22:23,759 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 828 transitions, 14518 flow [2024-06-28 03:22:23,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:23,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:23,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:23,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 03:22:23,760 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)] === [2024-06-28 03:22:23,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1077823109, now seen corresponding path program 3 times [2024-06-28 03:22:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:23,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780629473] [2024-06-28 03:22:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:23,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:24,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:24,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780629473] [2024-06-28 03:22:24,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780629473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:24,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:24,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:24,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234915660] [2024-06-28 03:22:24,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:24,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:24,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:24,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:24,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:24,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:22:24,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 828 transitions, 14518 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:24,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:24,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:22:24,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:26,751 INFO L124 PetriNetUnfolderBase]: 4434/6743 cut-off events. [2024-06-28 03:22:26,752 INFO L125 PetriNetUnfolderBase]: For 1999767/1999773 co-relation queries the response was YES. [2024-06-28 03:22:26,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87663 conditions, 6743 events. 4434/6743 cut-off events. For 1999767/1999773 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 38715 event pairs, 637 based on Foata normal form. 6/6748 useless extension candidates. Maximal degree in co-relation 87440. Up to 6092 conditions per place. [2024-06-28 03:22:26,881 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 719 selfloop transitions, 127 changer transitions 0/850 dead transitions. [2024-06-28 03:22:26,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 850 transitions, 16599 flow [2024-06-28 03:22:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:22:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:22:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 03:22:26,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-28 03:22:26,883 INFO L175 Difference]: Start difference. First operand has 463 places, 828 transitions, 14518 flow. Second operand 9 states and 146 transitions. [2024-06-28 03:22:26,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 850 transitions, 16599 flow [2024-06-28 03:22:35,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 850 transitions, 16330 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-28 03:22:35,678 INFO L231 Difference]: Finished difference. Result has 467 places, 829 transitions, 14541 flow [2024-06-28 03:22:35,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14249, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14541, PETRI_PLACES=467, PETRI_TRANSITIONS=829} [2024-06-28 03:22:35,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-28 03:22:35,678 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 829 transitions, 14541 flow [2024-06-28 03:22:35,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:35,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:35,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:35,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 03:22:35,679 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)] === [2024-06-28 03:22:35,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash -699736676, now seen corresponding path program 5 times [2024-06-28 03:22:35,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:35,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304533630] [2024-06-28 03:22:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:35,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:36,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:36,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304533630] [2024-06-28 03:22:36,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304533630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:36,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:36,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:36,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62794286] [2024-06-28 03:22:36,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:36,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:36,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:36,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:36,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:36,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:22:36,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 829 transitions, 14541 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:36,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:36,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:22:36,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:38,920 INFO L124 PetriNetUnfolderBase]: 4454/6771 cut-off events. [2024-06-28 03:22:38,920 INFO L125 PetriNetUnfolderBase]: For 2045164/2045170 co-relation queries the response was YES. [2024-06-28 03:22:39,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88294 conditions, 6771 events. 4454/6771 cut-off events. For 2045164/2045170 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 38865 event pairs, 639 based on Foata normal form. 8/6778 useless extension candidates. Maximal degree in co-relation 88069. Up to 6252 conditions per place. [2024-06-28 03:22:39,051 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 753 selfloop transitions, 97 changer transitions 0/854 dead transitions. [2024-06-28 03:22:39,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 854 transitions, 16481 flow [2024-06-28 03:22:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:22:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:22:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 03:22:39,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:22:39,052 INFO L175 Difference]: Start difference. First operand has 467 places, 829 transitions, 14541 flow. Second operand 9 states and 144 transitions. [2024-06-28 03:22:39,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 854 transitions, 16481 flow [2024-06-28 03:22:45,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 854 transitions, 16176 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-28 03:22:45,661 INFO L231 Difference]: Finished difference. Result has 470 places, 833 transitions, 14591 flow [2024-06-28 03:22:45,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14236, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14591, PETRI_PLACES=470, PETRI_TRANSITIONS=833} [2024-06-28 03:22:45,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-28 03:22:45,662 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 833 transitions, 14591 flow [2024-06-28 03:22:45,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:45,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:45,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 03:22:45,662 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)] === [2024-06-28 03:22:45,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash 445258931, now seen corresponding path program 4 times [2024-06-28 03:22:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:45,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952767267] [2024-06-28 03:22:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:46,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:46,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952767267] [2024-06-28 03:22:46,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952767267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:46,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:46,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:46,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671218274] [2024-06-28 03:22:46,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:46,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:46,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:46,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:46,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:46,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:22:46,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 833 transitions, 14591 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:46,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:46,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:22:46,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:48,818 INFO L124 PetriNetUnfolderBase]: 4456/6774 cut-off events. [2024-06-28 03:22:48,818 INFO L125 PetriNetUnfolderBase]: For 2045695/2045701 co-relation queries the response was YES. [2024-06-28 03:22:48,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88331 conditions, 6774 events. 4456/6774 cut-off events. For 2045695/2045701 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 38869 event pairs, 636 based on Foata normal form. 6/6779 useless extension candidates. Maximal degree in co-relation 88105. Up to 6261 conditions per place. [2024-06-28 03:22:48,969 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 755 selfloop transitions, 97 changer transitions 0/856 dead transitions. [2024-06-28 03:22:48,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 856 transitions, 16490 flow [2024-06-28 03:22:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:22:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:22:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 03:22:48,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-28 03:22:48,970 INFO L175 Difference]: Start difference. First operand has 470 places, 833 transitions, 14591 flow. Second operand 9 states and 143 transitions. [2024-06-28 03:22:48,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 856 transitions, 16490 flow [2024-06-28 03:22:58,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 856 transitions, 16167 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-28 03:22:58,075 INFO L231 Difference]: Finished difference. Result has 472 places, 836 transitions, 14586 flow [2024-06-28 03:22:58,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14268, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14586, PETRI_PLACES=472, PETRI_TRANSITIONS=836} [2024-06-28 03:22:58,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-28 03:22:58,076 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 836 transitions, 14586 flow [2024-06-28 03:22:58,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:58,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:58,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:58,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 03:22:58,077 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)] === [2024-06-28 03:22:58,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:58,077 INFO L85 PathProgramCache]: Analyzing trace with hash -699742256, now seen corresponding path program 6 times [2024-06-28 03:22:58,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:58,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250768929] [2024-06-28 03:22:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:58,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:58,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:58,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250768929] [2024-06-28 03:22:58,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250768929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:58,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:58,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:58,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644841648] [2024-06-28 03:22:58,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:58,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:58,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:58,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:59,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:22:59,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 836 transitions, 14586 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:59,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:59,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:22:59,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:01,203 INFO L124 PetriNetUnfolderBase]: 4476/6794 cut-off events. [2024-06-28 03:23:01,203 INFO L125 PetriNetUnfolderBase]: For 2088307/2088313 co-relation queries the response was YES. [2024-06-28 03:23:01,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88672 conditions, 6794 events. 4476/6794 cut-off events. For 2088307/2088313 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 38904 event pairs, 672 based on Foata normal form. 6/6799 useless extension candidates. Maximal degree in co-relation 88445. Up to 5559 conditions per place. [2024-06-28 03:23:01,336 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 612 selfloop transitions, 251 changer transitions 0/867 dead transitions. [2024-06-28 03:23:01,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 867 transitions, 16946 flow [2024-06-28 03:23:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:23:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:23:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-28 03:23:01,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-28 03:23:01,337 INFO L175 Difference]: Start difference. First operand has 472 places, 836 transitions, 14586 flow. Second operand 10 states and 163 transitions. [2024-06-28 03:23:01,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 867 transitions, 16946 flow [2024-06-28 03:23:10,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 867 transitions, 16653 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-28 03:23:10,574 INFO L231 Difference]: Finished difference. Result has 475 places, 840 transitions, 14983 flow [2024-06-28 03:23:10,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14299, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14983, PETRI_PLACES=475, PETRI_TRANSITIONS=840} [2024-06-28 03:23:10,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-28 03:23:10,575 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 840 transitions, 14983 flow [2024-06-28 03:23:10,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:10,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:10,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:10,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 03:23:10,575 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)] === [2024-06-28 03:23:10,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash 185206156, now seen corresponding path program 4 times [2024-06-28 03:23:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:10,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383437877] [2024-06-28 03:23:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:10,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383437877] [2024-06-28 03:23:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383437877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:11,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:11,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:23:11,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828440351] [2024-06-28 03:23:11,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:11,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:23:11,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:11,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:23:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:23:11,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:23:11,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 840 transitions, 14983 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:11,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:11,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:23:11,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:13,632 INFO L124 PetriNetUnfolderBase]: 4492/6826 cut-off events. [2024-06-28 03:23:13,632 INFO L125 PetriNetUnfolderBase]: For 2133421/2133427 co-relation queries the response was YES. [2024-06-28 03:23:13,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90247 conditions, 6826 events. 4492/6826 cut-off events. For 2133421/2133427 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 39175 event pairs, 636 based on Foata normal form. 8/6833 useless extension candidates. Maximal degree in co-relation 90019. Up to 6231 conditions per place. [2024-06-28 03:23:13,773 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 753 selfloop transitions, 107 changer transitions 0/864 dead transitions. [2024-06-28 03:23:13,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 864 transitions, 16969 flow [2024-06-28 03:23:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:23:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:23:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-28 03:23:13,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:23:13,775 INFO L175 Difference]: Start difference. First operand has 475 places, 840 transitions, 14983 flow. Second operand 9 states and 144 transitions. [2024-06-28 03:23:13,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 864 transitions, 16969 flow [2024-06-28 03:23:21,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 864 transitions, 16463 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-28 03:23:21,071 INFO L231 Difference]: Finished difference. Result has 477 places, 843 transitions, 14883 flow [2024-06-28 03:23:21,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14477, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14883, PETRI_PLACES=477, PETRI_TRANSITIONS=843} [2024-06-28 03:23:21,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-28 03:23:21,072 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 843 transitions, 14883 flow [2024-06-28 03:23:21,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:21,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:21,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:21,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 03:23:21,073 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)] === [2024-06-28 03:23:21,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash 174481396, now seen corresponding path program 5 times [2024-06-28 03:23:21,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:21,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401904838] [2024-06-28 03:23:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:21,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:21,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:21,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401904838] [2024-06-28 03:23:21,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401904838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:21,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:21,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:23:21,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367517981] [2024-06-28 03:23:21,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:21,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:23:21,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:23:21,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:23:21,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:23:21,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 843 transitions, 14883 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:21,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:21,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:23:21,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:24,420 INFO L124 PetriNetUnfolderBase]: 4508/6850 cut-off events. [2024-06-28 03:23:24,421 INFO L125 PetriNetUnfolderBase]: For 2164632/2164638 co-relation queries the response was YES. [2024-06-28 03:23:24,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90346 conditions, 6850 events. 4508/6850 cut-off events. For 2164632/2164638 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 39337 event pairs, 639 based on Foata normal form. 8/6857 useless extension candidates. Maximal degree in co-relation 90117. Up to 6331 conditions per place. [2024-06-28 03:23:24,551 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 770 selfloop transitions, 93 changer transitions 0/867 dead transitions. [2024-06-28 03:23:24,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 867 transitions, 16881 flow [2024-06-28 03:23:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:23:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:23:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 03:23:24,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-28 03:23:24,554 INFO L175 Difference]: Start difference. First operand has 477 places, 843 transitions, 14883 flow. Second operand 9 states and 143 transitions. [2024-06-28 03:23:24,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 867 transitions, 16881 flow [2024-06-28 03:23:32,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 867 transitions, 16497 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-28 03:23:32,230 INFO L231 Difference]: Finished difference. Result has 479 places, 846 transitions, 14883 flow [2024-06-28 03:23:32,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14499, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14883, PETRI_PLACES=479, PETRI_TRANSITIONS=846} [2024-06-28 03:23:32,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-28 03:23:32,231 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 846 transitions, 14883 flow [2024-06-28 03:23:32,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:32,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:32,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:32,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-28 03:23:32,231 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)] === [2024-06-28 03:23:32,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:32,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1192588824, now seen corresponding path program 6 times [2024-06-28 03:23:32,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:32,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314337370] [2024-06-28 03:23:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:32,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:33,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:33,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314337370] [2024-06-28 03:23:33,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314337370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:33,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:33,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:23:33,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940868535] [2024-06-28 03:23:33,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:33,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:23:33,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:33,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:23:33,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:23:33,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:23:33,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 846 transitions, 14883 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:33,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:33,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:23:33,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:35,377 INFO L124 PetriNetUnfolderBase]: 4524/6874 cut-off events. [2024-06-28 03:23:35,377 INFO L125 PetriNetUnfolderBase]: For 2194315/2194321 co-relation queries the response was YES. [2024-06-28 03:23:35,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90798 conditions, 6874 events. 4524/6874 cut-off events. For 2194315/2194321 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 39525 event pairs, 636 based on Foata normal form. 8/6881 useless extension candidates. Maximal degree in co-relation 90568. Up to 6345 conditions per place. [2024-06-28 03:23:35,522 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 775 selfloop transitions, 92 changer transitions 0/871 dead transitions. [2024-06-28 03:23:35,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 871 transitions, 16897 flow [2024-06-28 03:23:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:23:35,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:23:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 03:23:35,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-28 03:23:35,523 INFO L175 Difference]: Start difference. First operand has 479 places, 846 transitions, 14883 flow. Second operand 9 states and 143 transitions. [2024-06-28 03:23:35,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 871 transitions, 16897 flow [2024-06-28 03:23:44,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 871 transitions, 16535 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-28 03:23:44,244 INFO L231 Difference]: Finished difference. Result has 481 places, 849 transitions, 14909 flow [2024-06-28 03:23:44,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14521, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14909, PETRI_PLACES=481, PETRI_TRANSITIONS=849} [2024-06-28 03:23:44,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-28 03:23:44,245 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 849 transitions, 14909 flow [2024-06-28 03:23:44,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:44,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:44,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:44,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-28 03:23:44,245 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)] === [2024-06-28 03:23:44,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:44,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1181525730, now seen corresponding path program 2 times [2024-06-28 03:23:44,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:44,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424516297] [2024-06-28 03:23:44,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:44,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:45,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:45,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424516297] [2024-06-28 03:23:45,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424516297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:45,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:45,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:23:45,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101510183] [2024-06-28 03:23:45,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:45,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:23:45,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:23:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:23:45,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:23:45,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 849 transitions, 14909 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-28 03:23:45,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:45,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:23:45,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:47,847 INFO L124 PetriNetUnfolderBase]: 4534/6888 cut-off events. [2024-06-28 03:23:47,847 INFO L125 PetriNetUnfolderBase]: For 2198975/2198981 co-relation queries the response was YES. [2024-06-28 03:23:47,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91052 conditions, 6888 events. 4534/6888 cut-off events. For 2198975/2198981 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 39591 event pairs, 641 based on Foata normal form. 6/6893 useless extension candidates. Maximal degree in co-relation 90821. Up to 6229 conditions per place. [2024-06-28 03:23:47,974 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 737 selfloop transitions, 134 changer transitions 0/875 dead transitions. [2024-06-28 03:23:47,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 875 transitions, 17210 flow [2024-06-28 03:23:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:23:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:23:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-28 03:23:47,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-28 03:23:47,975 INFO L175 Difference]: Start difference. First operand has 481 places, 849 transitions, 14909 flow. Second operand 10 states and 160 transitions. [2024-06-28 03:23:47,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 875 transitions, 17210 flow [2024-06-28 03:23:57,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 875 transitions, 16844 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-28 03:23:57,777 INFO L231 Difference]: Finished difference. Result has 484 places, 853 transitions, 15007 flow [2024-06-28 03:23:57,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14543, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15007, PETRI_PLACES=484, PETRI_TRANSITIONS=853} [2024-06-28 03:23:57,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-28 03:23:57,778 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 853 transitions, 15007 flow [2024-06-28 03:23:57,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-28 03:23:57,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:57,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:57,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-28 03:23:57,778 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)] === [2024-06-28 03:23:57,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash 185606335, now seen corresponding path program 1 times [2024-06-28 03:23:57,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:57,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224249720] [2024-06-28 03:23:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:57,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:59,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:59,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224249720] [2024-06-28 03:23:59,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224249720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:59,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:59,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:23:59,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584936276] [2024-06-28 03:23:59,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:59,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:23:59,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:59,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:23:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:23:59,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:23:59,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 853 transitions, 15007 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-28 03:23:59,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:59,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:23:59,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:01,618 INFO L124 PetriNetUnfolderBase]: 4542/6905 cut-off events. [2024-06-28 03:24:01,618 INFO L125 PetriNetUnfolderBase]: For 2226400/2226406 co-relation queries the response was YES. [2024-06-28 03:24:01,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91330 conditions, 6905 events. 4542/6905 cut-off events. For 2226400/2226406 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 39699 event pairs, 670 based on Foata normal form. 8/6912 useless extension candidates. Maximal degree in co-relation 91098. Up to 6637 conditions per place. [2024-06-28 03:24:01,759 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 839 selfloop transitions, 32 changer transitions 0/875 dead transitions. [2024-06-28 03:24:01,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 875 transitions, 16989 flow [2024-06-28 03:24:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:24:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:24:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-28 03:24:01,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35853658536585364 [2024-06-28 03:24:01,761 INFO L175 Difference]: Start difference. First operand has 484 places, 853 transitions, 15007 flow. Second operand 10 states and 147 transitions. [2024-06-28 03:24:01,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 875 transitions, 16989 flow [2024-06-28 03:24:08,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 875 transitions, 16574 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-28 03:24:09,008 INFO L231 Difference]: Finished difference. Result has 486 places, 855 transitions, 14831 flow [2024-06-28 03:24:09,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14592, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14831, PETRI_PLACES=486, PETRI_TRANSITIONS=855} [2024-06-28 03:24:09,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-28 03:24:09,008 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 855 transitions, 14831 flow [2024-06-28 03:24:09,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-28 03:24:09,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:09,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:09,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-28 03:24:09,009 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)] === [2024-06-28 03:24:09,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1192250490, now seen corresponding path program 3 times [2024-06-28 03:24:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:09,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019626716] [2024-06-28 03:24:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:09,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:10,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:10,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019626716] [2024-06-28 03:24:10,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019626716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:10,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:10,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:24:10,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476059405] [2024-06-28 03:24:10,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:10,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:24:10,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:10,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:24:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:24:10,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:24:10,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 855 transitions, 14831 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-28 03:24:10,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:10,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:24:10,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:12,573 INFO L124 PetriNetUnfolderBase]: 4544/6903 cut-off events. [2024-06-28 03:24:12,573 INFO L125 PetriNetUnfolderBase]: For 2244622/2244628 co-relation queries the response was YES. [2024-06-28 03:24:12,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90971 conditions, 6903 events. 4544/6903 cut-off events. For 2244622/2244628 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 39699 event pairs, 641 based on Foata normal form. 6/6908 useless extension candidates. Maximal degree in co-relation 90738. Up to 6384 conditions per place. [2024-06-28 03:24:12,707 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 777 selfloop transitions, 98 changer transitions 0/879 dead transitions. [2024-06-28 03:24:12,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 879 transitions, 16763 flow [2024-06-28 03:24:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:24:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:24:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-28 03:24:12,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-28 03:24:12,708 INFO L175 Difference]: Start difference. First operand has 486 places, 855 transitions, 14831 flow. Second operand 10 states and 156 transitions. [2024-06-28 03:24:12,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 879 transitions, 16763 flow [2024-06-28 03:24:20,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 879 transitions, 16526 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-28 03:24:20,114 INFO L231 Difference]: Finished difference. Result has 488 places, 858 transitions, 14899 flow [2024-06-28 03:24:20,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14594, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14899, PETRI_PLACES=488, PETRI_TRANSITIONS=858} [2024-06-28 03:24:20,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-28 03:24:20,120 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 858 transitions, 14899 flow [2024-06-28 03:24:20,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 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) [2024-06-28 03:24:20,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:20,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:20,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-28 03:24:20,121 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)] === [2024-06-28 03:24:20,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash 274955331, now seen corresponding path program 2 times [2024-06-28 03:24:20,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:20,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722167956] [2024-06-28 03:24:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:20,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:20,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:20,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722167956] [2024-06-28 03:24:20,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722167956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:20,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:20,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:24:20,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507537194] [2024-06-28 03:24:20,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:20,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:24:20,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:20,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:24:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:24:20,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:24:20,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 858 transitions, 14899 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:20,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:20,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:24:20,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:23,358 INFO L124 PetriNetUnfolderBase]: 4554/6901 cut-off events. [2024-06-28 03:24:23,358 INFO L125 PetriNetUnfolderBase]: For 2267986/2267988 co-relation queries the response was YES. [2024-06-28 03:24:23,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91357 conditions, 6901 events. 4554/6901 cut-off events. For 2267986/2267988 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 39531 event pairs, 668 based on Foata normal form. 2/6898 useless extension candidates. Maximal degree in co-relation 91123. Up to 6090 conditions per place. [2024-06-28 03:24:23,493 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 720 selfloop transitions, 163 changer transitions 0/887 dead transitions. [2024-06-28 03:24:23,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 887 transitions, 16963 flow [2024-06-28 03:24:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:24:23,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 03:24:23,494 INFO L175 Difference]: Start difference. First operand has 488 places, 858 transitions, 14899 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:24:23,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 887 transitions, 16963 flow [2024-06-28 03:24:35,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 887 transitions, 16612 flow, removed 80 selfloop flow, removed 8 redundant places. [2024-06-28 03:24:35,019 INFO L231 Difference]: Finished difference. Result has 488 places, 863 transitions, 15082 flow [2024-06-28 03:24:35,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14548, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15082, PETRI_PLACES=488, PETRI_TRANSITIONS=863} [2024-06-28 03:24:35,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-28 03:24:35,020 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 863 transitions, 15082 flow [2024-06-28 03:24:35,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:35,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:35,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:35,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-28 03:24:35,021 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)] === [2024-06-28 03:24:35,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:35,021 INFO L85 PathProgramCache]: Analyzing trace with hash -940488751, now seen corresponding path program 3 times [2024-06-28 03:24:35,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:35,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727746937] [2024-06-28 03:24:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:35,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:35,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:35,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727746937] [2024-06-28 03:24:35,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727746937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:35,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:35,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:24:35,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375701459] [2024-06-28 03:24:35,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:35,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:24:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:24:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:24:35,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:24:35,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 863 transitions, 15082 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:35,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:35,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:24:35,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:38,415 INFO L124 PetriNetUnfolderBase]: 4551/6889 cut-off events. [2024-06-28 03:24:38,416 INFO L125 PetriNetUnfolderBase]: For 2273265/2273267 co-relation queries the response was YES. [2024-06-28 03:24:38,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91478 conditions, 6889 events. 4551/6889 cut-off events. For 2273265/2273267 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 39368 event pairs, 648 based on Foata normal form. 1/6885 useless extension candidates. Maximal degree in co-relation 91243. Up to 5928 conditions per place. [2024-06-28 03:24:38,560 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 665 selfloop transitions, 217 changer transitions 0/886 dead transitions. [2024-06-28 03:24:38,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 886 transitions, 17258 flow [2024-06-28 03:24:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:24:38,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-28 03:24:38,562 INFO L175 Difference]: Start difference. First operand has 488 places, 863 transitions, 15082 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:24:38,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 886 transitions, 17258 flow [2024-06-28 03:24:48,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 886 transitions, 16768 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-28 03:24:48,069 INFO L231 Difference]: Finished difference. Result has 490 places, 863 transitions, 15037 flow [2024-06-28 03:24:48,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14592, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15037, PETRI_PLACES=490, PETRI_TRANSITIONS=863} [2024-06-28 03:24:48,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-28 03:24:48,069 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 863 transitions, 15037 flow [2024-06-28 03:24:48,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:48,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:48,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:48,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-28 03:24:48,070 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)] === [2024-06-28 03:24:48,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:48,070 INFO L85 PathProgramCache]: Analyzing trace with hash -974240934, now seen corresponding path program 7 times [2024-06-28 03:24:48,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:48,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658782657] [2024-06-28 03:24:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:48,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:48,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:48,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658782657] [2024-06-28 03:24:48,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658782657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:48,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:48,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:24:48,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313075169] [2024-06-28 03:24:48,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:48,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:24:48,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:24:48,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:24:48,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:24:48,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 863 transitions, 15037 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:48,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:48,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:24:48,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:51,270 INFO L124 PetriNetUnfolderBase]: 4555/6925 cut-off events. [2024-06-28 03:24:51,270 INFO L125 PetriNetUnfolderBase]: For 2317267/2317273 co-relation queries the response was YES. [2024-06-28 03:24:51,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91568 conditions, 6925 events. 4555/6925 cut-off events. For 2317267/2317273 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 39918 event pairs, 682 based on Foata normal form. 8/6932 useless extension candidates. Maximal degree in co-relation 91332. Up to 6098 conditions per place. [2024-06-28 03:24:51,401 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 746 selfloop transitions, 148 changer transitions 0/898 dead transitions. [2024-06-28 03:24:51,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 898 transitions, 17259 flow [2024-06-28 03:24:51,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:24:51,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-28 03:24:51,402 INFO L175 Difference]: Start difference. First operand has 490 places, 863 transitions, 15037 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:24:51,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 898 transitions, 17259 flow [2024-06-28 03:25:01,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 898 transitions, 16695 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-28 03:25:01,142 INFO L231 Difference]: Finished difference. Result has 490 places, 874 transitions, 15119 flow [2024-06-28 03:25:01,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14481, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15119, PETRI_PLACES=490, PETRI_TRANSITIONS=874} [2024-06-28 03:25:01,143 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-28 03:25:01,143 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 874 transitions, 15119 flow [2024-06-28 03:25:01,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:01,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:01,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:01,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-28 03:25:01,143 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)] === [2024-06-28 03:25:01,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1180772011, now seen corresponding path program 4 times [2024-06-28 03:25:01,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:01,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587939491] [2024-06-28 03:25:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:01,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:01,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:01,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587939491] [2024-06-28 03:25:01,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587939491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:01,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:01,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:01,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641330108] [2024-06-28 03:25:01,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:01,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:01,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:01,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:01,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:01,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:25:01,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 874 transitions, 15119 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:01,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:01,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:25:01,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:04,779 INFO L124 PetriNetUnfolderBase]: 4549/6897 cut-off events. [2024-06-28 03:25:04,779 INFO L125 PetriNetUnfolderBase]: For 2300157/2300159 co-relation queries the response was YES. [2024-06-28 03:25:04,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91271 conditions, 6897 events. 4549/6897 cut-off events. For 2300157/2300159 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 39554 event pairs, 678 based on Foata normal form. 2/6894 useless extension candidates. Maximal degree in co-relation 91035. Up to 6084 conditions per place. [2024-06-28 03:25:04,915 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 727 selfloop transitions, 162 changer transitions 0/893 dead transitions. [2024-06-28 03:25:04,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 893 transitions, 16973 flow [2024-06-28 03:25:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:25:04,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-28 03:25:04,916 INFO L175 Difference]: Start difference. First operand has 490 places, 874 transitions, 15119 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:25:04,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 893 transitions, 16973 flow [2024-06-28 03:25:15,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 893 transitions, 16549 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-28 03:25:15,667 INFO L231 Difference]: Finished difference. Result has 494 places, 874 transitions, 15035 flow [2024-06-28 03:25:15,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14695, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15035, PETRI_PLACES=494, PETRI_TRANSITIONS=874} [2024-06-28 03:25:15,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-28 03:25:15,668 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 874 transitions, 15035 flow [2024-06-28 03:25:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:15,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:15,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:15,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-28 03:25:15,668 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)] === [2024-06-28 03:25:15,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash 221435678, now seen corresponding path program 7 times [2024-06-28 03:25:15,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:15,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097329195] [2024-06-28 03:25:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:15,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:16,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097329195] [2024-06-28 03:25:16,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097329195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:16,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:16,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:16,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089403296] [2024-06-28 03:25:16,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:16,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:16,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:16,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:25:16,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 874 transitions, 15035 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:16,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:16,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:25:16,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:19,195 INFO L124 PetriNetUnfolderBase]: 4559/6910 cut-off events. [2024-06-28 03:25:19,195 INFO L125 PetriNetUnfolderBase]: For 2331286/2331288 co-relation queries the response was YES. [2024-06-28 03:25:19,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91477 conditions, 6910 events. 4559/6910 cut-off events. For 2331286/2331288 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 39559 event pairs, 654 based on Foata normal form. 2/6907 useless extension candidates. Maximal degree in co-relation 91239. Up to 6092 conditions per place. [2024-06-28 03:25:19,326 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 726 selfloop transitions, 172 changer transitions 0/902 dead transitions. [2024-06-28 03:25:19,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 902 transitions, 17091 flow [2024-06-28 03:25:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 03:25:19,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-28 03:25:19,327 INFO L175 Difference]: Start difference. First operand has 494 places, 874 transitions, 15035 flow. Second operand 9 states and 150 transitions. [2024-06-28 03:25:19,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 902 transitions, 17091 flow [2024-06-28 03:25:30,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 902 transitions, 16727 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:25:30,357 INFO L231 Difference]: Finished difference. Result has 496 places, 877 transitions, 15166 flow [2024-06-28 03:25:30,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14671, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15166, PETRI_PLACES=496, PETRI_TRANSITIONS=877} [2024-06-28 03:25:30,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-28 03:25:30,358 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 877 transitions, 15166 flow [2024-06-28 03:25:30,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:30,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:30,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:30,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-28 03:25:30,358 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)] === [2024-06-28 03:25:30,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash 221435306, now seen corresponding path program 8 times [2024-06-28 03:25:30,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:30,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497862546] [2024-06-28 03:25:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:30,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:30,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:30,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497862546] [2024-06-28 03:25:30,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497862546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:30,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:30,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:25:30,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376712432] [2024-06-28 03:25:30,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:30,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:25:30,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:25:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:25:31,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:25:31,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 877 transitions, 15166 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:31,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:31,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:25:31,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:33,735 INFO L124 PetriNetUnfolderBase]: 4563/6939 cut-off events. [2024-06-28 03:25:33,736 INFO L125 PetriNetUnfolderBase]: For 2364560/2364566 co-relation queries the response was YES. [2024-06-28 03:25:33,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91911 conditions, 6939 events. 4563/6939 cut-off events. For 2364560/2364566 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 40087 event pairs, 679 based on Foata normal form. 8/6946 useless extension candidates. Maximal degree in co-relation 91672. Up to 6082 conditions per place. [2024-06-28 03:25:33,866 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 743 selfloop transitions, 158 changer transitions 0/905 dead transitions. [2024-06-28 03:25:33,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 905 transitions, 17294 flow [2024-06-28 03:25:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:25:33,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:25:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:25:33,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-28 03:25:33,868 INFO L175 Difference]: Start difference. First operand has 496 places, 877 transitions, 15166 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:25:33,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 905 transitions, 17294 flow [2024-06-28 03:25:45,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 905 transitions, 16823 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-28 03:25:45,570 INFO L231 Difference]: Finished difference. Result has 497 places, 883 transitions, 15244 flow [2024-06-28 03:25:45,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14695, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15244, PETRI_PLACES=497, PETRI_TRANSITIONS=883} [2024-06-28 03:25:45,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-28 03:25:45,571 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 883 transitions, 15244 flow [2024-06-28 03:25:45,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:45,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:45,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:45,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-28 03:25:45,572 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)] === [2024-06-28 03:25:45,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1180775886, now seen corresponding path program 8 times [2024-06-28 03:25:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:45,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822636214] [2024-06-28 03:25:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:45,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:46,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:46,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822636214] [2024-06-28 03:25:46,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822636214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:46,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:46,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:46,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656802520] [2024-06-28 03:25:46,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:46,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:46,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:46,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:46,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:46,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:25:46,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 883 transitions, 15244 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:46,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:46,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:25:46,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:49,333 INFO L124 PetriNetUnfolderBase]: 4573/6938 cut-off events. [2024-06-28 03:25:49,333 INFO L125 PetriNetUnfolderBase]: For 2368872/2368874 co-relation queries the response was YES. [2024-06-28 03:25:49,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92124 conditions, 6938 events. 4573/6938 cut-off events. For 2368872/2368874 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 39871 event pairs, 677 based on Foata normal form. 4/6936 useless extension candidates. Maximal degree in co-relation 91884. Up to 6112 conditions per place. [2024-06-28 03:25:49,491 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 741 selfloop transitions, 163 changer transitions 0/908 dead transitions. [2024-06-28 03:25:49,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 908 transitions, 17296 flow [2024-06-28 03:25:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:25:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:25:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-28 03:25:49,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-28 03:25:49,492 INFO L175 Difference]: Start difference. First operand has 497 places, 883 transitions, 15244 flow. Second operand 10 states and 162 transitions. [2024-06-28 03:25:49,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 908 transitions, 17296 flow [2024-06-28 03:25:59,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 908 transitions, 16847 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-28 03:25:59,886 INFO L231 Difference]: Finished difference. Result has 501 places, 886 transitions, 15278 flow [2024-06-28 03:25:59,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14795, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15278, PETRI_PLACES=501, PETRI_TRANSITIONS=886} [2024-06-28 03:25:59,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 459 predicate places. [2024-06-28 03:25:59,887 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 886 transitions, 15278 flow [2024-06-28 03:25:59,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:25:59,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:59,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:59,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-28 03:25:59,887 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)] === [2024-06-28 03:25:59,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash 575698718, now seen corresponding path program 9 times [2024-06-28 03:25:59,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:59,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261731635] [2024-06-28 03:25:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:59,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:00,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:00,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261731635] [2024-06-28 03:26:00,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261731635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:00,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:00,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:00,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864227582] [2024-06-28 03:26:00,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:00,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:00,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:00,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:26:00,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 886 transitions, 15278 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:00,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:00,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:26:00,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:03,513 INFO L124 PetriNetUnfolderBase]: 4583/6937 cut-off events. [2024-06-28 03:26:03,514 INFO L125 PetriNetUnfolderBase]: For 2401934/2401936 co-relation queries the response was YES. [2024-06-28 03:26:03,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92646 conditions, 6937 events. 4583/6937 cut-off events. For 2401934/2401936 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 39666 event pairs, 638 based on Foata normal form. 2/6934 useless extension candidates. Maximal degree in co-relation 92405. Up to 6016 conditions per place. [2024-06-28 03:26:03,650 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 702 selfloop transitions, 206 changer transitions 0/912 dead transitions. [2024-06-28 03:26:03,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 912 transitions, 17364 flow [2024-06-28 03:26:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-28 03:26:03,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-28 03:26:03,651 INFO L175 Difference]: Start difference. First operand has 501 places, 886 transitions, 15278 flow. Second operand 9 states and 150 transitions. [2024-06-28 03:26:03,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 912 transitions, 17364 flow [2024-06-28 03:26:15,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 912 transitions, 16991 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-28 03:26:15,201 INFO L231 Difference]: Finished difference. Result has 504 places, 889 transitions, 15479 flow [2024-06-28 03:26:15,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14905, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15479, PETRI_PLACES=504, PETRI_TRANSITIONS=889} [2024-06-28 03:26:15,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-28 03:26:15,202 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 889 transitions, 15479 flow [2024-06-28 03:26:15,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:15,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:15,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:15,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-28 03:26:15,203 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)] === [2024-06-28 03:26:15,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:15,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1413088912, now seen corresponding path program 10 times [2024-06-28 03:26:15,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:15,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234397338] [2024-06-28 03:26:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:15,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:15,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:15,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234397338] [2024-06-28 03:26:15,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234397338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:15,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:15,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:15,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900507552] [2024-06-28 03:26:15,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:15,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:15,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:15,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:15,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:26:15,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 889 transitions, 15479 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:15,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:15,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:26:15,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:18,585 INFO L124 PetriNetUnfolderBase]: 4577/6945 cut-off events. [2024-06-28 03:26:18,586 INFO L125 PetriNetUnfolderBase]: For 2409550/2409552 co-relation queries the response was YES. [2024-06-28 03:26:18,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92881 conditions, 6945 events. 4577/6945 cut-off events. For 2409550/2409552 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 39892 event pairs, 663 based on Foata normal form. 2/6945 useless extension candidates. Maximal degree in co-relation 92639. Up to 6552 conditions per place. [2024-06-28 03:26:18,729 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 847 selfloop transitions, 62 changer transitions 0/913 dead transitions. [2024-06-28 03:26:18,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 913 transitions, 17521 flow [2024-06-28 03:26:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 03:26:18,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-28 03:26:18,730 INFO L175 Difference]: Start difference. First operand has 504 places, 889 transitions, 15479 flow. Second operand 9 states and 141 transitions. [2024-06-28 03:26:18,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 913 transitions, 17521 flow [2024-06-28 03:26:27,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 913 transitions, 16969 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:27,232 INFO L231 Difference]: Finished difference. Result has 506 places, 892 transitions, 15191 flow [2024-06-28 03:26:27,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14927, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15191, PETRI_PLACES=506, PETRI_TRANSITIONS=892} [2024-06-28 03:26:27,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-28 03:26:27,233 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 892 transitions, 15191 flow [2024-06-28 03:26:27,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:27,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:27,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:27,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-28 03:26:27,233 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)] === [2024-06-28 03:26:27,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:27,234 INFO L85 PathProgramCache]: Analyzing trace with hash -204510722, now seen corresponding path program 9 times [2024-06-28 03:26:27,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:27,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843472669] [2024-06-28 03:26:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:27,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:27,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:27,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843472669] [2024-06-28 03:26:27,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843472669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:27,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:27,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:27,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529562947] [2024-06-28 03:26:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:27,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:27,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:28,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:26:28,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 892 transitions, 15191 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:28,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:28,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:26:28,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:30,612 INFO L124 PetriNetUnfolderBase]: 4587/6972 cut-off events. [2024-06-28 03:26:30,612 INFO L125 PetriNetUnfolderBase]: For 2434928/2434934 co-relation queries the response was YES. [2024-06-28 03:26:30,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92474 conditions, 6972 events. 4587/6972 cut-off events. For 2434928/2434934 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 40225 event pairs, 666 based on Foata normal form. 8/6979 useless extension candidates. Maximal degree in co-relation 92231. Up to 5911 conditions per place. [2024-06-28 03:26:30,750 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 696 selfloop transitions, 217 changer transitions 0/917 dead transitions. [2024-06-28 03:26:30,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 917 transitions, 17532 flow [2024-06-28 03:26:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-28 03:26:30,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-28 03:26:30,751 INFO L175 Difference]: Start difference. First operand has 506 places, 892 transitions, 15191 flow. Second operand 9 states and 143 transitions. [2024-06-28 03:26:30,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 917 transitions, 17532 flow [2024-06-28 03:26:42,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 917 transitions, 17294 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:42,031 INFO L231 Difference]: Finished difference. Result has 508 places, 895 transitions, 15476 flow [2024-06-28 03:26:42,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14953, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15476, PETRI_PLACES=508, PETRI_TRANSITIONS=895} [2024-06-28 03:26:42,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-28 03:26:42,031 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 895 transitions, 15476 flow [2024-06-28 03:26:42,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:42,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:42,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:42,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-28 03:26:42,032 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)] === [2024-06-28 03:26:42,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1511948272, now seen corresponding path program 11 times [2024-06-28 03:26:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:42,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334867080] [2024-06-28 03:26:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:42,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:42,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:42,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334867080] [2024-06-28 03:26:42,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334867080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:42,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:42,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:42,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993469285] [2024-06-28 03:26:42,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:42,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:42,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:42,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:42,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:42,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:26:42,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 895 transitions, 15476 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:42,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:42,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:26:42,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:45,530 INFO L124 PetriNetUnfolderBase]: 4613/6981 cut-off events. [2024-06-28 03:26:45,531 INFO L125 PetriNetUnfolderBase]: For 2492399/2492401 co-relation queries the response was YES. [2024-06-28 03:26:45,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93977 conditions, 6981 events. 4613/6981 cut-off events. For 2492399/2492401 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 40003 event pairs, 637 based on Foata normal form. 2/6978 useless extension candidates. Maximal degree in co-relation 93733. Up to 5944 conditions per place. [2024-06-28 03:26:45,674 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 701 selfloop transitions, 224 changer transitions 0/929 dead transitions. [2024-06-28 03:26:45,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 929 transitions, 18104 flow [2024-06-28 03:26:45,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:26:45,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:26:45,676 INFO L175 Difference]: Start difference. First operand has 508 places, 895 transitions, 15476 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:26:45,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 929 transitions, 18104 flow [2024-06-28 03:26:58,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 929 transitions, 17608 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:58,351 INFO L231 Difference]: Finished difference. Result has 511 places, 905 transitions, 15825 flow [2024-06-28 03:26:58,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14980, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15825, PETRI_PLACES=511, PETRI_TRANSITIONS=905} [2024-06-28 03:26:58,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-28 03:26:58,351 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 905 transitions, 15825 flow [2024-06-28 03:26:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:58,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:58,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:58,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-28 03:26:58,352 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)] === [2024-06-28 03:26:58,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash 320391276, now seen corresponding path program 12 times [2024-06-28 03:26:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519287298] [2024-06-28 03:26:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:58,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:59,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:59,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519287298] [2024-06-28 03:26:59,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519287298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:59,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:59,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250970654] [2024-06-28 03:26:59,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:59,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:59,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:59,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:59,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:59,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:26:59,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 905 transitions, 15825 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:59,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:59,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:26:59,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:01,963 INFO L124 PetriNetUnfolderBase]: 4631/7019 cut-off events. [2024-06-28 03:27:01,963 INFO L125 PetriNetUnfolderBase]: For 2545683/2545685 co-relation queries the response was YES. [2024-06-28 03:27:02,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95305 conditions, 7019 events. 4631/7019 cut-off events. For 2545683/2545685 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40342 event pairs, 691 based on Foata normal form. 2/7015 useless extension candidates. Maximal degree in co-relation 95060. Up to 6106 conditions per place. [2024-06-28 03:27:02,237 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 739 selfloop transitions, 188 changer transitions 0/931 dead transitions. [2024-06-28 03:27:02,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 931 transitions, 18415 flow [2024-06-28 03:27:02,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-28 03:27:02,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-28 03:27:02,239 INFO L175 Difference]: Start difference. First operand has 511 places, 905 transitions, 15825 flow. Second operand 9 states and 153 transitions. [2024-06-28 03:27:02,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 931 transitions, 18415 flow [2024-06-28 03:27:13,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 931 transitions, 18053 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-28 03:27:13,406 INFO L231 Difference]: Finished difference. Result has 516 places, 911 transitions, 16180 flow [2024-06-28 03:27:13,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15463, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=905, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=720, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16180, PETRI_PLACES=516, PETRI_TRANSITIONS=911} [2024-06-28 03:27:13,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 474 predicate places. [2024-06-28 03:27:13,406 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 911 transitions, 16180 flow [2024-06-28 03:27:13,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:13,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:13,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:13,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-28 03:27:13,407 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)] === [2024-06-28 03:27:13,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:13,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1750159487, now seen corresponding path program 5 times [2024-06-28 03:27:13,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:13,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508304500] [2024-06-28 03:27:13,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:13,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:14,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:14,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508304500] [2024-06-28 03:27:14,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508304500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:14,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:14,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:14,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837487335] [2024-06-28 03:27:14,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:14,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:14,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:14,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:27:14,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 911 transitions, 16180 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:14,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:14,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:27:14,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:17,063 INFO L124 PetriNetUnfolderBase]: 4626/7029 cut-off events. [2024-06-28 03:27:17,063 INFO L125 PetriNetUnfolderBase]: For 2552835/2552837 co-relation queries the response was YES. [2024-06-28 03:27:17,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95751 conditions, 7029 events. 4626/7029 cut-off events. For 2552835/2552837 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40563 event pairs, 672 based on Foata normal form. 1/7028 useless extension candidates. Maximal degree in co-relation 95504. Up to 6623 conditions per place. [2024-06-28 03:27:17,202 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 866 selfloop transitions, 62 changer transitions 0/932 dead transitions. [2024-06-28 03:27:17,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 932 transitions, 18150 flow [2024-06-28 03:27:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 03:27:17,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-28 03:27:17,204 INFO L175 Difference]: Start difference. First operand has 516 places, 911 transitions, 16180 flow. Second operand 9 states and 140 transitions. [2024-06-28 03:27:17,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 932 transitions, 18150 flow [2024-06-28 03:27:28,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 932 transitions, 17690 flow, removed 131 selfloop flow, removed 5 redundant places. [2024-06-28 03:27:28,324 INFO L231 Difference]: Finished difference. Result has 520 places, 912 transitions, 15882 flow [2024-06-28 03:27:28,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15734, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=849, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15882, PETRI_PLACES=520, PETRI_TRANSITIONS=912} [2024-06-28 03:27:28,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-28 03:27:28,325 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 912 transitions, 15882 flow [2024-06-28 03:27:28,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:28,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:28,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:28,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-28 03:27:28,326 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)] === [2024-06-28 03:27:28,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:28,326 INFO L85 PathProgramCache]: Analyzing trace with hash -144826598, now seen corresponding path program 13 times [2024-06-28 03:27:28,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:28,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853297235] [2024-06-28 03:27:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:28,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:29,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:29,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853297235] [2024-06-28 03:27:29,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853297235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:29,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:29,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259922605] [2024-06-28 03:27:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:29,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:29,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:29,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:29,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:29,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:27:29,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 912 transitions, 15882 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:29,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:29,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:27:29,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:31,921 INFO L124 PetriNetUnfolderBase]: 4652/7026 cut-off events. [2024-06-28 03:27:31,921 INFO L125 PetriNetUnfolderBase]: For 2621742/2621744 co-relation queries the response was YES. [2024-06-28 03:27:32,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96695 conditions, 7026 events. 4652/7026 cut-off events. For 2621742/2621744 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 40157 event pairs, 654 based on Foata normal form. 2/7023 useless extension candidates. Maximal degree in co-relation 96446. Up to 5889 conditions per place. [2024-06-28 03:27:32,067 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 671 selfloop transitions, 265 changer transitions 0/940 dead transitions. [2024-06-28 03:27:32,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 940 transitions, 18846 flow [2024-06-28 03:27:32,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 03:27:32,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-28 03:27:32,068 INFO L175 Difference]: Start difference. First operand has 520 places, 912 transitions, 15882 flow. Second operand 9 states and 154 transitions. [2024-06-28 03:27:32,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 940 transitions, 18846 flow [2024-06-28 03:27:43,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 940 transitions, 18696 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 03:27:43,275 INFO L231 Difference]: Finished difference. Result has 523 places, 920 transitions, 16648 flow [2024-06-28 03:27:43,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15732, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16648, PETRI_PLACES=523, PETRI_TRANSITIONS=920} [2024-06-28 03:27:43,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-28 03:27:43,275 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 920 transitions, 16648 flow [2024-06-28 03:27:43,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:43,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:43,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:43,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-28 03:27:43,276 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)] === [2024-06-28 03:27:43,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1575005094, now seen corresponding path program 10 times [2024-06-28 03:27:43,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:43,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758943519] [2024-06-28 03:27:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:43,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:44,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:44,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758943519] [2024-06-28 03:27:44,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758943519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:44,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:44,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:44,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675755487] [2024-06-28 03:27:44,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:44,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:44,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:44,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:44,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:44,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-28 03:27:44,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 920 transitions, 16648 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:27:44,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:44,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-28 03:27:44,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15