./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:55:10,625 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:55:10,657 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:55:10,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:55:10,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:55:10,673 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:55:10,673 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:55:10,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:55:10,674 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:55:10,674 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:55:10,674 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:55:10,674 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:55:10,675 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:55:10,675 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:55:10,675 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:55:10,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:55:10,676 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:55:10,676 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:55:10,676 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:55:10,676 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:55:10,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:55:10,677 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:55:10,677 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:55:10,677 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:55:10,678 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:55:10,678 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:55:10,678 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:55:10,678 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:55:10,678 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:55:10,679 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:55:10,679 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:55:10,679 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:55:10,679 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:55:10,679 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:55:10,680 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:55:10,680 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:55:10,680 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:55:10,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:55:10,680 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:55:10,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:55:10,681 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:55:10,684 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:55:10,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:55:10,684 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:55:10,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:55:10,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:55:10,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:55:10,899 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:55:10,899 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:55:10,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 20:55:11,079 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:55:11,079 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:55:11,080 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-21 20:55:12,117 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:55:12,330 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:55:12,332 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-21 20:55:12,342 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edee3f73a/2d7e284590794a28bf539d55cb99e54f/FLAGc4757a032 [2024-06-21 20:55:12,352 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edee3f73a/2d7e284590794a28bf539d55cb99e54f [2024-06-21 20:55:12,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:55:12,354 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:55:12,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:55:12,358 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:55:12,361 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:55:12,362 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:55:11" (1/2) ... [2024-06-21 20:55:12,363 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188d056e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:55:12, skipping insertion in model container [2024-06-21 20:55:12,363 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:55:11" (1/2) ... [2024-06-21 20:55:12,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c4f3087 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:55:12, skipping insertion in model container [2024-06-21 20:55:12,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:55:12" (2/2) ... [2024-06-21 20:55:12,364 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188d056e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:12, skipping insertion in model container [2024-06-21 20:55:12,364 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:55:12" (2/2) ... [2024-06-21 20:55:12,365 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:55:12,451 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:55:12,452 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-21 20:55:12,452 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 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$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-21 20:55:12,452 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-21 20:55:12,453 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 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$r_buff0_thd4 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd4 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-21 20:55:12,453 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:55:12,453 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-21 20:55:12,484 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:55:12,834 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:55:12,846 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:55:12,987 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:55:13,029 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:55:13,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13 WrapperNode [2024-06-21 20:55:13,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:55:13,031 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:55:13,032 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:55:13,032 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:55:13,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,069 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,114 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-21 20:55:13,114 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:55:13,115 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:55:13,115 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:55:13,115 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:55:13,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,154 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,180 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:55:13,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,196 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,213 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,217 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,220 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:55:13,220 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:55:13,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:55:13,221 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:55:13,221 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (1/1) ... [2024-06-21 20:55:13,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:55:13,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:55:13,258 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:55:13,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:55:13,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:55:13,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:55:13,309 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:55:13,310 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:55:13,310 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:55:13,310 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:55:13,310 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:55:13,310 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:55:13,310 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 20:55:13,311 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 20:55:13,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:55:13,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:55:13,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:55:13,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:55:13,315 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:55:13,478 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:55:13,480 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:55:13,834 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:55:13,834 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:55:13,943 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:55:13,944 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:55:13,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:55:13 BoogieIcfgContainer [2024-06-21 20:55:13,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:55:13,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:55:13,946 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:55:13,948 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:55:13,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:55:11" (1/4) ... [2024-06-21 20:55:13,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a950f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:55:13, skipping insertion in model container [2024-06-21 20:55:13,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:55:12" (2/4) ... [2024-06-21 20:55:13,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a950f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:55:13, skipping insertion in model container [2024-06-21 20:55:13,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:55:13" (3/4) ... [2024-06-21 20:55:13,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a950f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:55:13, skipping insertion in model container [2024-06-21 20:55:13,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:55:13" (4/4) ... [2024-06-21 20:55:13,950 INFO L112 eAbstractionObserver]: Analyzing ICFG mix029_power.opt_pso.opt_rmo.opt.i [2024-06-21 20:55:13,965 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:55:13,965 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 20:55:13,965 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:55:14,002 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:55:14,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 20:55:14,078 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 20:55:14,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:55:14,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:55:14,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 20:55:14,083 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 20:55:14,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:55:14,094 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;@74088fc4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:55:14,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 20:55:14,097 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:55:14,097 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:55:14,097 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:55:14,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:14,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:55:14,098 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:14,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash 389440905, now seen corresponding path program 1 times [2024-06-21 20:55:14,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:14,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535389096] [2024-06-21 20:55:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:14,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:14,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:14,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535389096] [2024-06-21 20:55:14,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535389096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:14,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:14,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:55:14,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906000268] [2024-06-21 20:55:14,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:14,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:55:14,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:15,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:55:15,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:55:15,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 20:55:15,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:15,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:15,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 20:55:15,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:16,278 INFO L124 PetriNetUnfolderBase]: 7775/11127 cut-off events. [2024-06-21 20:55:16,279 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-06-21 20:55:16,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22099 conditions, 11127 events. 7775/11127 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 63774 event pairs, 5733 based on Foata normal form. 1/10783 useless extension candidates. Maximal degree in co-relation 22086. Up to 10609 conditions per place. [2024-06-21 20:55:16,336 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 20:55:16,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-21 20:55:16,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:55:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:55:16,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-21 20:55:16,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-21 20:55:16,348 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 96 transitions. [2024-06-21 20:55:16,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-21 20:55:16,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:16,355 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 20:55:16,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 20:55:16,359 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 20:55:16,360 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 20:55:16,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:16,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:16,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:16,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:55:16,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:16,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 590575656, now seen corresponding path program 1 times [2024-06-21 20:55:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:16,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001434657] [2024-06-21 20:55:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:16,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:16,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001434657] [2024-06-21 20:55:16,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001434657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:16,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:16,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:55:16,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879465151] [2024-06-21 20:55:16,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:16,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:55:16,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:55:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:55:17,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:55:17,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:17,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:17,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:55:17,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:18,207 INFO L124 PetriNetUnfolderBase]: 9097/12637 cut-off events. [2024-06-21 20:55:18,207 INFO L125 PetriNetUnfolderBase]: For 2438/2438 co-relation queries the response was YES. [2024-06-21 20:55:18,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28720 conditions, 12637 events. 9097/12637 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 69920 event pairs, 5837 based on Foata normal form. 4/12637 useless extension candidates. Maximal degree in co-relation 28708. Up to 12338 conditions per place. [2024-06-21 20:55:18,263 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-21 20:55:18,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-21 20:55:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:55:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:55:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-21 20:55:18,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-21 20:55:18,265 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 122 transitions. [2024-06-21 20:55:18,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-21 20:55:18,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:55:18,267 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 20:55:18,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 20:55:18,267 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 20:55:18,268 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 20:55:18,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:18,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:18,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:55:18,268 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:18,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1654027547, now seen corresponding path program 1 times [2024-06-21 20:55:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:18,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818594585] [2024-06-21 20:55:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:18,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:19,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:19,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818594585] [2024-06-21 20:55:19,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818594585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:19,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:19,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:55:19,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509385162] [2024-06-21 20:55:19,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:19,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:55:19,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:55:19,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:55:19,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:55:19,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:19,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:19,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:55:19,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:20,562 INFO L124 PetriNetUnfolderBase]: 11555/15928 cut-off events. [2024-06-21 20:55:20,562 INFO L125 PetriNetUnfolderBase]: For 8202/8202 co-relation queries the response was YES. [2024-06-21 20:55:20,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39937 conditions, 15928 events. 11555/15928 cut-off events. For 8202/8202 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86326 event pairs, 5920 based on Foata normal form. 8/15932 useless extension candidates. Maximal degree in co-relation 39923. Up to 15541 conditions per place. [2024-06-21 20:55:20,631 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 71 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-21 20:55:20,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 486 flow [2024-06-21 20:55:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:55:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:55:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-21 20:55:20,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-21 20:55:20,633 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 169 transitions. [2024-06-21 20:55:20,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 486 flow [2024-06-21 20:55:20,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 458 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 20:55:20,636 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-21 20:55:20,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 20:55:20,637 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 20:55:20,637 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-21 20:55:20,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:20,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:20,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:20,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:55:20,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:20,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:20,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1482349763, now seen corresponding path program 1 times [2024-06-21 20:55:20,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:20,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911255878] [2024-06-21 20:55:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:20,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:21,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:21,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911255878] [2024-06-21 20:55:21,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911255878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:21,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:21,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:55:21,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427860529] [2024-06-21 20:55:21,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:21,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:55:21,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:55:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:55:21,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:55:21,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:21,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:21,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:55:21,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:22,713 INFO L124 PetriNetUnfolderBase]: 9854/13976 cut-off events. [2024-06-21 20:55:22,713 INFO L125 PetriNetUnfolderBase]: For 13385/13385 co-relation queries the response was YES. [2024-06-21 20:55:22,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38252 conditions, 13976 events. 9854/13976 cut-off events. For 13385/13385 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78931 event pairs, 5511 based on Foata normal form. 3/13773 useless extension candidates. Maximal degree in co-relation 38235. Up to 13366 conditions per place. [2024-06-21 20:55:22,786 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 60 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-21 20:55:22,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 447 flow [2024-06-21 20:55:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:55:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:55:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 20:55:22,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-21 20:55:22,788 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 122 transitions. [2024-06-21 20:55:22,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 447 flow [2024-06-21 20:55:22,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:22,792 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 264 flow [2024-06-21 20:55:22,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-21 20:55:22,793 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-21 20:55:22,793 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 264 flow [2024-06-21 20:55:22,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:22,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:22,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:22,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:55:22,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:22,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1315032729, now seen corresponding path program 1 times [2024-06-21 20:55:22,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:22,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101068049] [2024-06-21 20:55:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:22,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:23,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:23,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101068049] [2024-06-21 20:55:23,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101068049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:23,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:23,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:55:23,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681179802] [2024-06-21 20:55:23,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:23,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:55:23,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:23,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:55:23,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:55:23,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:55:23,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:23,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:23,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:55:23,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:24,938 INFO L124 PetriNetUnfolderBase]: 9836/13952 cut-off events. [2024-06-21 20:55:24,938 INFO L125 PetriNetUnfolderBase]: For 20720/20720 co-relation queries the response was YES. [2024-06-21 20:55:24,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41479 conditions, 13952 events. 9836/13952 cut-off events. For 20720/20720 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78697 event pairs, 5261 based on Foata normal form. 6/13752 useless extension candidates. Maximal degree in co-relation 41460. Up to 13312 conditions per place. [2024-06-21 20:55:25,028 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 68 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-21 20:55:25,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 520 flow [2024-06-21 20:55:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:55:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:55:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:55:25,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 20:55:25,030 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 264 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:55:25,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 520 flow [2024-06-21 20:55:25,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 89 transitions, 491 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:25,035 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 310 flow [2024-06-21 20:55:25,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-21 20:55:25,036 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-06-21 20:55:25,036 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 310 flow [2024-06-21 20:55:25,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:25,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:25,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:25,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:55:25,037 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:25,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:25,038 INFO L85 PathProgramCache]: Analyzing trace with hash -840215710, now seen corresponding path program 1 times [2024-06-21 20:55:25,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:25,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126255931] [2024-06-21 20:55:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:25,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:25,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:25,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126255931] [2024-06-21 20:55:25,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126255931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:25,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:25,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:55:25,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401961724] [2024-06-21 20:55:25,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:25,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:55:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:25,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:55:25,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:55:25,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:25,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:25,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:25,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:25,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:27,312 INFO L124 PetriNetUnfolderBase]: 11550/15932 cut-off events. [2024-06-21 20:55:27,313 INFO L125 PetriNetUnfolderBase]: For 35741/35753 co-relation queries the response was YES. [2024-06-21 20:55:27,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51531 conditions, 15932 events. 11550/15932 cut-off events. For 35741/35753 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86304 event pairs, 6273 based on Foata normal form. 11/15937 useless extension candidates. Maximal degree in co-relation 51511. Up to 15550 conditions per place. [2024-06-21 20:55:27,403 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 75 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-21 20:55:27,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 102 transitions, 672 flow [2024-06-21 20:55:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:55:27,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:55:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:55:27,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-21 20:55:27,404 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 310 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:55:27,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 102 transitions, 672 flow [2024-06-21 20:55:27,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 102 transitions, 629 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:27,410 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 392 flow [2024-06-21 20:55:27,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-06-21 20:55:27,411 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-21 20:55:27,411 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 392 flow [2024-06-21 20:55:27,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:27,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:27,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:27,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:55:27,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:27,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1366837896, now seen corresponding path program 2 times [2024-06-21 20:55:27,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:27,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423245243] [2024-06-21 20:55:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:27,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:28,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:28,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423245243] [2024-06-21 20:55:28,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423245243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:28,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:28,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:55:28,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434049876] [2024-06-21 20:55:28,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:28,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:55:28,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:28,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:55:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:55:28,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:28,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 392 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:28,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:28,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:28,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:29,557 INFO L124 PetriNetUnfolderBase]: 11541/15921 cut-off events. [2024-06-21 20:55:29,557 INFO L125 PetriNetUnfolderBase]: For 49178/49187 co-relation queries the response was YES. [2024-06-21 20:55:29,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55267 conditions, 15921 events. 11541/15921 cut-off events. For 49178/49187 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86349 event pairs, 6276 based on Foata normal form. 9/15923 useless extension candidates. Maximal degree in co-relation 55246. Up to 15541 conditions per place. [2024-06-21 20:55:29,656 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 69 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-06-21 20:55:29,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 634 flow [2024-06-21 20:55:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:55:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:55:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 20:55:29,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-21 20:55:29,658 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 392 flow. Second operand 6 states and 142 transitions. [2024-06-21 20:55:29,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 634 flow [2024-06-21 20:55:29,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 580 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 20:55:29,679 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 391 flow [2024-06-21 20:55:29,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-06-21 20:55:29,679 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-21 20:55:29,679 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 391 flow [2024-06-21 20:55:29,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:29,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:29,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:29,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:55:29,680 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:29,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash -808566324, now seen corresponding path program 1 times [2024-06-21 20:55:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:29,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451805624] [2024-06-21 20:55:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:30,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:30,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451805624] [2024-06-21 20:55:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451805624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:30,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:30,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:30,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282560049] [2024-06-21 20:55:30,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:30,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:30,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:30,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:30,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:30,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:30,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:30,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:30,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:30,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:32,037 INFO L124 PetriNetUnfolderBase]: 11632/16059 cut-off events. [2024-06-21 20:55:32,037 INFO L125 PetriNetUnfolderBase]: For 55882/55886 co-relation queries the response was YES. [2024-06-21 20:55:32,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56298 conditions, 16059 events. 11632/16059 cut-off events. For 55882/55886 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87030 event pairs, 6266 based on Foata normal form. 7/16062 useless extension candidates. Maximal degree in co-relation 56275. Up to 15643 conditions per place. [2024-06-21 20:55:32,152 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 93 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-21 20:55:32,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 131 transitions, 866 flow [2024-06-21 20:55:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:55:32,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-21 20:55:32,157 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 391 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:55:32,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 131 transitions, 866 flow [2024-06-21 20:55:32,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 131 transitions, 792 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:32,181 INFO L231 Difference]: Finished difference. Result has 76 places, 91 transitions, 547 flow [2024-06-21 20:55:32,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=547, PETRI_PLACES=76, PETRI_TRANSITIONS=91} [2024-06-21 20:55:32,184 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-21 20:55:32,184 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 91 transitions, 547 flow [2024-06-21 20:55:32,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:32,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:32,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:32,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:55:32,185 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:32,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1203389628, now seen corresponding path program 2 times [2024-06-21 20:55:32,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:32,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452230049] [2024-06-21 20:55:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:32,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:33,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:33,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452230049] [2024-06-21 20:55:33,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452230049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:33,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119899220] [2024-06-21 20:55:33,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:33,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:33,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:33,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:33,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 91 transitions, 547 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:33,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:33,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:33,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:34,787 INFO L124 PetriNetUnfolderBase]: 11654/16113 cut-off events. [2024-06-21 20:55:34,787 INFO L125 PetriNetUnfolderBase]: For 72332/72340 co-relation queries the response was YES. [2024-06-21 20:55:34,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60621 conditions, 16113 events. 11654/16113 cut-off events. For 72332/72340 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87410 event pairs, 6120 based on Foata normal form. 11/16120 useless extension candidates. Maximal degree in co-relation 60596. Up to 15650 conditions per place. [2024-06-21 20:55:34,896 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 93 selfloop transitions, 34 changer transitions 0/133 dead transitions. [2024-06-21 20:55:34,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 133 transitions, 975 flow [2024-06-21 20:55:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:55:34,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 20:55:34,898 INFO L175 Difference]: Start difference. First operand has 76 places, 91 transitions, 547 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:55:34,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 133 transitions, 975 flow [2024-06-21 20:55:34,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 133 transitions, 913 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:34,925 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 624 flow [2024-06-21 20:55:34,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=624, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-21 20:55:34,926 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-21 20:55:34,927 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 624 flow [2024-06-21 20:55:34,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:34,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:34,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:34,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:55:34,928 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:34,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1203384978, now seen corresponding path program 3 times [2024-06-21 20:55:34,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:34,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493493845] [2024-06-21 20:55:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:34,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:35,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:35,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493493845] [2024-06-21 20:55:35,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493493845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:35,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:35,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433034928] [2024-06-21 20:55:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:35,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:35,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:35,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:35,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 624 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:35,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:35,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:35,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:37,166 INFO L124 PetriNetUnfolderBase]: 11676/16150 cut-off events. [2024-06-21 20:55:37,167 INFO L125 PetriNetUnfolderBase]: For 92212/92226 co-relation queries the response was YES. [2024-06-21 20:55:37,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64685 conditions, 16150 events. 11676/16150 cut-off events. For 92212/92226 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87771 event pairs, 6133 based on Foata normal form. 11/16155 useless extension candidates. Maximal degree in co-relation 64659. Up to 15594 conditions per place. [2024-06-21 20:55:37,280 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 83 selfloop transitions, 50 changer transitions 0/139 dead transitions. [2024-06-21 20:55:37,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 139 transitions, 1162 flow [2024-06-21 20:55:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:55:37,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-21 20:55:37,283 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 624 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:55:37,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 139 transitions, 1162 flow [2024-06-21 20:55:37,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 139 transitions, 1039 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 20:55:37,330 INFO L231 Difference]: Finished difference. Result has 82 places, 103 transitions, 734 flow [2024-06-21 20:55:37,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=82, PETRI_TRANSITIONS=103} [2024-06-21 20:55:37,331 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-21 20:55:37,331 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 103 transitions, 734 flow [2024-06-21 20:55:37,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:37,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:37,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:37,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:55:37,332 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:37,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash -176781062, now seen corresponding path program 1 times [2024-06-21 20:55:37,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:37,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117776599] [2024-06-21 20:55:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:37,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:38,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:38,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117776599] [2024-06-21 20:55:38,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117776599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:38,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:38,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:38,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440904810] [2024-06-21 20:55:38,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:38,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:38,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:38,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:38,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 103 transitions, 734 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:38,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:38,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:38,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:39,836 INFO L124 PetriNetUnfolderBase]: 11720/16215 cut-off events. [2024-06-21 20:55:39,836 INFO L125 PetriNetUnfolderBase]: For 94147/94164 co-relation queries the response was YES. [2024-06-21 20:55:39,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64973 conditions, 16215 events. 11720/16215 cut-off events. For 94147/94164 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88232 event pairs, 5727 based on Foata normal form. 17/16224 useless extension candidates. Maximal degree in co-relation 64946. Up to 15656 conditions per place. [2024-06-21 20:55:39,947 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 112 selfloop transitions, 35 changer transitions 0/153 dead transitions. [2024-06-21 20:55:39,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 153 transitions, 1304 flow [2024-06-21 20:55:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:55:39,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 20:55:39,949 INFO L175 Difference]: Start difference. First operand has 82 places, 103 transitions, 734 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:55:39,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 153 transitions, 1304 flow [2024-06-21 20:55:39,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 153 transitions, 1239 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:39,989 INFO L231 Difference]: Finished difference. Result has 86 places, 111 transitions, 846 flow [2024-06-21 20:55:39,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=846, PETRI_PLACES=86, PETRI_TRANSITIONS=111} [2024-06-21 20:55:39,990 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 20:55:39,990 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 111 transitions, 846 flow [2024-06-21 20:55:39,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:39,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:39,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:39,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:55:39,991 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:39,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash 577699852, now seen corresponding path program 4 times [2024-06-21 20:55:39,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:39,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370371323] [2024-06-21 20:55:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:39,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:40,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:40,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370371323] [2024-06-21 20:55:40,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370371323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:40,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:40,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:40,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976268475] [2024-06-21 20:55:40,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:40,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:40,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:40,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:40,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:40,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:40,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 111 transitions, 846 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:40,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:40,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:40,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:42,634 INFO L124 PetriNetUnfolderBase]: 11711/16197 cut-off events. [2024-06-21 20:55:42,634 INFO L125 PetriNetUnfolderBase]: For 114689/114694 co-relation queries the response was YES. [2024-06-21 20:55:42,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68802 conditions, 16197 events. 11711/16197 cut-off events. For 114689/114694 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87946 event pairs, 5984 based on Foata normal form. 3/16182 useless extension candidates. Maximal degree in co-relation 68773. Up to 15645 conditions per place. [2024-06-21 20:55:42,711 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 86 selfloop transitions, 50 changer transitions 0/142 dead transitions. [2024-06-21 20:55:42,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 142 transitions, 1216 flow [2024-06-21 20:55:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:55:42,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-21 20:55:42,713 INFO L175 Difference]: Start difference. First operand has 86 places, 111 transitions, 846 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:55:42,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 142 transitions, 1216 flow [2024-06-21 20:55:42,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 142 transitions, 1135 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:42,762 INFO L231 Difference]: Finished difference. Result has 90 places, 111 transitions, 876 flow [2024-06-21 20:55:42,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=90, PETRI_TRANSITIONS=111} [2024-06-21 20:55:42,762 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-21 20:55:42,762 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 111 transitions, 876 flow [2024-06-21 20:55:42,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:42,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:42,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:42,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:55:42,763 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:42,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash -170114822, now seen corresponding path program 2 times [2024-06-21 20:55:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479102314] [2024-06-21 20:55:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:42,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:43,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479102314] [2024-06-21 20:55:43,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479102314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:43,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:43,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:43,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431763911] [2024-06-21 20:55:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:43,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:43,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:43,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:43,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:43,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 111 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:43,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:43,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:43,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:45,251 INFO L124 PetriNetUnfolderBase]: 11755/16262 cut-off events. [2024-06-21 20:55:45,251 INFO L125 PetriNetUnfolderBase]: For 128454/128475 co-relation queries the response was YES. [2024-06-21 20:55:45,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70459 conditions, 16262 events. 11755/16262 cut-off events. For 128454/128475 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88437 event pairs, 5713 based on Foata normal form. 20/16272 useless extension candidates. Maximal degree in co-relation 70428. Up to 15682 conditions per place. [2024-06-21 20:55:45,387 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 108 selfloop transitions, 40 changer transitions 0/154 dead transitions. [2024-06-21 20:55:45,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 154 transitions, 1416 flow [2024-06-21 20:55:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:55:45,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-21 20:55:45,406 INFO L175 Difference]: Start difference. First operand has 90 places, 111 transitions, 876 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:55:45,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 154 transitions, 1416 flow [2024-06-21 20:55:45,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 1282 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:45,481 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 885 flow [2024-06-21 20:55:45,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=885, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-21 20:55:45,482 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2024-06-21 20:55:45,482 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 885 flow [2024-06-21 20:55:45,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:45,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:45,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:45,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:55:45,483 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:45,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1026253272, now seen corresponding path program 3 times [2024-06-21 20:55:45,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:45,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280753929] [2024-06-21 20:55:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:45,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:46,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:46,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280753929] [2024-06-21 20:55:46,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280753929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:46,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:46,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:55:46,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579529767] [2024-06-21 20:55:46,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:46,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:55:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:55:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:55:46,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:46,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 885 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:46,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:46,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:46,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:48,004 INFO L124 PetriNetUnfolderBase]: 11737/16238 cut-off events. [2024-06-21 20:55:48,004 INFO L125 PetriNetUnfolderBase]: For 141572/141593 co-relation queries the response was YES. [2024-06-21 20:55:48,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71531 conditions, 16238 events. 11737/16238 cut-off events. For 141572/141593 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88184 event pairs, 5710 based on Foata normal form. 20/16248 useless extension candidates. Maximal degree in co-relation 71499. Up to 15667 conditions per place. [2024-06-21 20:55:48,145 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 107 selfloop transitions, 39 changer transitions 0/152 dead transitions. [2024-06-21 20:55:48,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 152 transitions, 1299 flow [2024-06-21 20:55:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:55:48,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 20:55:48,146 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 885 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:55:48,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 152 transitions, 1299 flow [2024-06-21 20:55:48,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 152 transitions, 1167 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 20:55:48,261 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 842 flow [2024-06-21 20:55:48,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=842, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-21 20:55:48,262 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-21 20:55:48,262 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 842 flow [2024-06-21 20:55:48,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:48,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:48,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:48,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:55:48,262 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:48,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:48,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1026007194, now seen corresponding path program 1 times [2024-06-21 20:55:48,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:48,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237120059] [2024-06-21 20:55:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:48,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:49,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:49,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237120059] [2024-06-21 20:55:49,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237120059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:49,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:49,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:55:49,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301840354] [2024-06-21 20:55:49,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:49,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:55:49,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:55:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:55:49,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:55:49,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 842 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:49,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:49,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:55:49,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:51,180 INFO L124 PetriNetUnfolderBase]: 10030/14025 cut-off events. [2024-06-21 20:55:51,181 INFO L125 PetriNetUnfolderBase]: For 133930/133932 co-relation queries the response was YES. [2024-06-21 20:55:51,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63144 conditions, 14025 events. 10030/14025 cut-off events. For 133930/133932 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 77382 event pairs, 4745 based on Foata normal form. 6/13881 useless extension candidates. Maximal degree in co-relation 63111. Up to 13549 conditions per place. [2024-06-21 20:55:51,277 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 127 selfloop transitions, 17 changer transitions 0/151 dead transitions. [2024-06-21 20:55:51,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 151 transitions, 1280 flow [2024-06-21 20:55:51,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:55:51,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:55:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:55:51,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 20:55:51,279 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 842 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:55:51,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 151 transitions, 1280 flow [2024-06-21 20:55:51,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 151 transitions, 1170 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 20:55:51,360 INFO L231 Difference]: Finished difference. Result has 94 places, 118 transitions, 830 flow [2024-06-21 20:55:51,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=830, PETRI_PLACES=94, PETRI_TRANSITIONS=118} [2024-06-21 20:55:51,361 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-21 20:55:51,361 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 118 transitions, 830 flow [2024-06-21 20:55:51,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:51,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:51,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:51,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:55:51,362 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:51,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2000730435, now seen corresponding path program 1 times [2024-06-21 20:55:51,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:51,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88684499] [2024-06-21 20:55:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:51,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:52,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88684499] [2024-06-21 20:55:52,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88684499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:52,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:52,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:55:52,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231269897] [2024-06-21 20:55:52,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:52,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:55:52,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:55:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:55:52,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 20:55:52,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 118 transitions, 830 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:52,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:52,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 20:55:52,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:53,319 INFO L124 PetriNetUnfolderBase]: 9426/13786 cut-off events. [2024-06-21 20:55:53,319 INFO L125 PetriNetUnfolderBase]: For 146491/146508 co-relation queries the response was YES. [2024-06-21 20:55:53,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63382 conditions, 13786 events. 9426/13786 cut-off events. For 146491/146508 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 81556 event pairs, 4946 based on Foata normal form. 17/13616 useless extension candidates. Maximal degree in co-relation 63348. Up to 12829 conditions per place. [2024-06-21 20:55:53,442 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 111 selfloop transitions, 10 changer transitions 0/136 dead transitions. [2024-06-21 20:55:53,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 136 transitions, 1158 flow [2024-06-21 20:55:53,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:55:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:55:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 20:55:53,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-21 20:55:53,444 INFO L175 Difference]: Start difference. First operand has 94 places, 118 transitions, 830 flow. Second operand 5 states and 122 transitions. [2024-06-21 20:55:53,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 136 transitions, 1158 flow [2024-06-21 20:55:53,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 1086 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:55:53,543 INFO L231 Difference]: Finished difference. Result has 94 places, 122 transitions, 837 flow [2024-06-21 20:55:53,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=837, PETRI_PLACES=94, PETRI_TRANSITIONS=122} [2024-06-21 20:55:53,543 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-21 20:55:53,544 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 122 transitions, 837 flow [2024-06-21 20:55:53,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:53,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:53,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:53,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:55:53,544 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:53,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2888830, now seen corresponding path program 1 times [2024-06-21 20:55:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286156609] [2024-06-21 20:55:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:54,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286156609] [2024-06-21 20:55:54,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286156609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:54,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:54,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:55:54,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086931686] [2024-06-21 20:55:54,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:54,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:55:54,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:54,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:55:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:55:54,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:54,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 122 transitions, 837 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:54,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:54,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:54,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:56,296 INFO L124 PetriNetUnfolderBase]: 11759/16279 cut-off events. [2024-06-21 20:55:56,296 INFO L125 PetriNetUnfolderBase]: For 201631/201639 co-relation queries the response was YES. [2024-06-21 20:55:56,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79075 conditions, 16279 events. 11759/16279 cut-off events. For 201631/201639 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88359 event pairs, 5808 based on Foata normal form. 14/16287 useless extension candidates. Maximal degree in co-relation 79040. Up to 15756 conditions per place. [2024-06-21 20:55:56,448 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 128 selfloop transitions, 38 changer transitions 0/172 dead transitions. [2024-06-21 20:55:56,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 172 transitions, 1381 flow [2024-06-21 20:55:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:56,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:55:56,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-21 20:55:56,450 INFO L175 Difference]: Start difference. First operand has 94 places, 122 transitions, 837 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:55:56,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 172 transitions, 1381 flow [2024-06-21 20:55:56,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 172 transitions, 1332 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 20:55:56,567 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 944 flow [2024-06-21 20:55:56,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=944, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2024-06-21 20:55:56,567 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 20:55:56,568 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 944 flow [2024-06-21 20:55:56,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:56,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:56,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:56,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:55:56,568 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:56,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash 6607900, now seen corresponding path program 2 times [2024-06-21 20:55:56,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:56,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907841971] [2024-06-21 20:55:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:56,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:55:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:55:57,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:55:57,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907841971] [2024-06-21 20:55:57,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907841971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:55:57,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:55:57,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:55:57,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793732493] [2024-06-21 20:55:57,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:55:57,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:55:57,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:55:57,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:55:57,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:55:57,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:55:57,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 944 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:57,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:55:57,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:55:57,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:55:59,447 INFO L124 PetriNetUnfolderBase]: 11865/16482 cut-off events. [2024-06-21 20:55:59,447 INFO L125 PetriNetUnfolderBase]: For 231894/231905 co-relation queries the response was YES. [2024-06-21 20:55:59,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84068 conditions, 16482 events. 11865/16482 cut-off events. For 231894/231905 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89924 event pairs, 5381 based on Foata normal form. 10/16484 useless extension candidates. Maximal degree in co-relation 84032. Up to 15541 conditions per place. [2024-06-21 20:55:59,578 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 109 selfloop transitions, 74 changer transitions 0/189 dead transitions. [2024-06-21 20:55:59,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 189 transitions, 1850 flow [2024-06-21 20:55:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:55:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:55:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 20:55:59,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-21 20:55:59,579 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 944 flow. Second operand 8 states and 206 transitions. [2024-06-21 20:55:59,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 189 transitions, 1850 flow [2024-06-21 20:55:59,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 189 transitions, 1728 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:55:59,725 INFO L231 Difference]: Finished difference. Result has 101 places, 138 transitions, 1193 flow [2024-06-21 20:55:59,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=101, PETRI_TRANSITIONS=138} [2024-06-21 20:55:59,725 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-21 20:55:59,725 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 138 transitions, 1193 flow [2024-06-21 20:55:59,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:55:59,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:55:59,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:55:59,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:55:59,726 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:55:59,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:55:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash 6613480, now seen corresponding path program 3 times [2024-06-21 20:55:59,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:55:59,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930093145] [2024-06-21 20:55:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:55:59,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:55:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:00,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:00,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930093145] [2024-06-21 20:56:00,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930093145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:00,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:00,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277030001] [2024-06-21 20:56:00,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:00,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:00,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:00,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:00,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 138 transitions, 1193 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:00,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:00,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:00,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:02,695 INFO L124 PetriNetUnfolderBase]: 11847/16458 cut-off events. [2024-06-21 20:56:02,696 INFO L125 PetriNetUnfolderBase]: For 265814/265825 co-relation queries the response was YES. [2024-06-21 20:56:02,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87654 conditions, 16458 events. 11847/16458 cut-off events. For 265814/265825 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89878 event pairs, 5381 based on Foata normal form. 10/16460 useless extension candidates. Maximal degree in co-relation 87617. Up to 15526 conditions per place. [2024-06-21 20:56:02,813 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 103 selfloop transitions, 76 changer transitions 0/185 dead transitions. [2024-06-21 20:56:02,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 185 transitions, 1791 flow [2024-06-21 20:56:02,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:56:02,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831730769230769 [2024-06-21 20:56:02,825 INFO L175 Difference]: Start difference. First operand has 101 places, 138 transitions, 1193 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:56:02,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 185 transitions, 1791 flow [2024-06-21 20:56:02,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 185 transitions, 1642 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-21 20:56:02,988 INFO L231 Difference]: Finished difference. Result has 106 places, 138 transitions, 1207 flow [2024-06-21 20:56:02,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1207, PETRI_PLACES=106, PETRI_TRANSITIONS=138} [2024-06-21 20:56:02,988 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-21 20:56:02,988 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 138 transitions, 1207 flow [2024-06-21 20:56:02,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:02,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:02,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:02,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:56:02,989 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:02,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1283148072, now seen corresponding path program 4 times [2024-06-21 20:56:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:02,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044831198] [2024-06-21 20:56:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:02,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:03,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:03,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044831198] [2024-06-21 20:56:03,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044831198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:03,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:03,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:03,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688175468] [2024-06-21 20:56:03,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:03,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:03,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:03,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:03,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:03,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 138 transitions, 1207 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:03,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:03,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:03,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:05,730 INFO L124 PetriNetUnfolderBase]: 11891/16531 cut-off events. [2024-06-21 20:56:05,730 INFO L125 PetriNetUnfolderBase]: For 287007/287012 co-relation queries the response was YES. [2024-06-21 20:56:05,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89435 conditions, 16531 events. 11891/16531 cut-off events. For 287007/287012 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90339 event pairs, 5393 based on Foata normal form. 6/16519 useless extension candidates. Maximal degree in co-relation 89396. Up to 15564 conditions per place. [2024-06-21 20:56:05,908 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 98 selfloop transitions, 82 changer transitions 0/186 dead transitions. [2024-06-21 20:56:05,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 186 transitions, 1889 flow [2024-06-21 20:56:05,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:56:05,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 20:56:05,911 INFO L175 Difference]: Start difference. First operand has 106 places, 138 transitions, 1207 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:56:05,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 186 transitions, 1889 flow [2024-06-21 20:56:06,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 186 transitions, 1718 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:06,097 INFO L231 Difference]: Finished difference. Result has 107 places, 142 transitions, 1295 flow [2024-06-21 20:56:06,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1295, PETRI_PLACES=107, PETRI_TRANSITIONS=142} [2024-06-21 20:56:06,103 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-21 20:56:06,103 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 142 transitions, 1295 flow [2024-06-21 20:56:06,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:06,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:06,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:06,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:56:06,104 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:06,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash -985942168, now seen corresponding path program 5 times [2024-06-21 20:56:06,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:06,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784448108] [2024-06-21 20:56:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:06,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:06,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:06,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784448108] [2024-06-21 20:56:06,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784448108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:06,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:06,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:06,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699589217] [2024-06-21 20:56:06,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:06,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:06,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:07,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:07,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 142 transitions, 1295 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:07,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:07,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:07,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:08,899 INFO L124 PetriNetUnfolderBase]: 11935/16591 cut-off events. [2024-06-21 20:56:08,899 INFO L125 PetriNetUnfolderBase]: For 310227/310232 co-relation queries the response was YES. [2024-06-21 20:56:08,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91149 conditions, 16591 events. 11935/16591 cut-off events. For 310227/310232 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90635 event pairs, 5385 based on Foata normal form. 6/16579 useless extension candidates. Maximal degree in co-relation 91109. Up to 15602 conditions per place. [2024-06-21 20:56:09,046 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 103 selfloop transitions, 82 changer transitions 0/191 dead transitions. [2024-06-21 20:56:09,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 191 transitions, 1995 flow [2024-06-21 20:56:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:56:09,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 20:56:09,048 INFO L175 Difference]: Start difference. First operand has 107 places, 142 transitions, 1295 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:56:09,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 191 transitions, 1995 flow [2024-06-21 20:56:09,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 191 transitions, 1785 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 20:56:09,233 INFO L231 Difference]: Finished difference. Result has 110 places, 146 transitions, 1344 flow [2024-06-21 20:56:09,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1344, PETRI_PLACES=110, PETRI_TRANSITIONS=146} [2024-06-21 20:56:09,233 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-21 20:56:09,234 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 146 transitions, 1344 flow [2024-06-21 20:56:09,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:09,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:09,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:09,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:56:09,234 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:09,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1749084272, now seen corresponding path program 6 times [2024-06-21 20:56:09,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:09,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349472680] [2024-06-21 20:56:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:09,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:10,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:10,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349472680] [2024-06-21 20:56:10,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349472680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:10,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:10,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:10,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142496247] [2024-06-21 20:56:10,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:10,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:10,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:10,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:10,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:10,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:10,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 146 transitions, 1344 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:10,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:10,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:10,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:12,068 INFO L124 PetriNetUnfolderBase]: 11917/16567 cut-off events. [2024-06-21 20:56:12,068 INFO L125 PetriNetUnfolderBase]: For 331047/331052 co-relation queries the response was YES. [2024-06-21 20:56:12,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91843 conditions, 16567 events. 11917/16567 cut-off events. For 331047/331052 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90410 event pairs, 5382 based on Foata normal form. 6/16555 useless extension candidates. Maximal degree in co-relation 91802. Up to 15587 conditions per place. [2024-06-21 20:56:12,217 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 99 selfloop transitions, 83 changer transitions 0/188 dead transitions. [2024-06-21 20:56:12,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 188 transitions, 1836 flow [2024-06-21 20:56:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:56:12,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 20:56:12,219 INFO L175 Difference]: Start difference. First operand has 110 places, 146 transitions, 1344 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:56:12,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 188 transitions, 1836 flow [2024-06-21 20:56:12,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 188 transitions, 1512 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:12,464 INFO L231 Difference]: Finished difference. Result has 111 places, 146 transitions, 1197 flow [2024-06-21 20:56:12,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1197, PETRI_PLACES=111, PETRI_TRANSITIONS=146} [2024-06-21 20:56:12,465 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-21 20:56:12,465 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 146 transitions, 1197 flow [2024-06-21 20:56:12,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:12,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:12,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:12,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:56:12,466 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:12,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1931533231, now seen corresponding path program 1 times [2024-06-21 20:56:12,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761655995] [2024-06-21 20:56:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:13,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:13,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761655995] [2024-06-21 20:56:13,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761655995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:13,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:13,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:56:13,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648981236] [2024-06-21 20:56:13,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:13,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:56:13,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:13,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:56:13,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:56:13,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:56:13,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 146 transitions, 1197 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:13,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:13,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:56:13,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:14,893 INFO L124 PetriNetUnfolderBase]: 11165/15781 cut-off events. [2024-06-21 20:56:14,893 INFO L125 PetriNetUnfolderBase]: For 344184/344225 co-relation queries the response was YES. [2024-06-21 20:56:14,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89418 conditions, 15781 events. 11165/15781 cut-off events. For 344184/344225 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 89160 event pairs, 5719 based on Foata normal form. 18/15747 useless extension candidates. Maximal degree in co-relation 89376. Up to 15139 conditions per place. [2024-06-21 20:56:15,015 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 144 selfloop transitions, 22 changer transitions 0/180 dead transitions. [2024-06-21 20:56:15,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 180 transitions, 1807 flow [2024-06-21 20:56:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:56:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:56:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:56:15,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 20:56:15,016 INFO L175 Difference]: Start difference. First operand has 111 places, 146 transitions, 1197 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:56:15,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 180 transitions, 1807 flow [2024-06-21 20:56:15,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 1630 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:15,255 INFO L231 Difference]: Finished difference. Result has 112 places, 160 transitions, 1242 flow [2024-06-21 20:56:15,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1242, PETRI_PLACES=112, PETRI_TRANSITIONS=160} [2024-06-21 20:56:15,255 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 57 predicate places. [2024-06-21 20:56:15,255 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 160 transitions, 1242 flow [2024-06-21 20:56:15,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:15,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:15,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:15,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:56:15,256 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:15,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:15,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1224854965, now seen corresponding path program 1 times [2024-06-21 20:56:15,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:15,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378052498] [2024-06-21 20:56:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:15,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:16,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:16,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378052498] [2024-06-21 20:56:16,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378052498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:16,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:16,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:16,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206510678] [2024-06-21 20:56:16,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:16,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:16,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:16,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:16,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 160 transitions, 1242 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:16,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:16,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:16,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:18,445 INFO L124 PetriNetUnfolderBase]: 12425/17316 cut-off events. [2024-06-21 20:56:18,445 INFO L125 PetriNetUnfolderBase]: For 407559/407687 co-relation queries the response was YES. [2024-06-21 20:56:18,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101583 conditions, 17316 events. 12425/17316 cut-off events. For 407559/407687 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95204 event pairs, 4759 based on Foata normal form. 14/17280 useless extension candidates. Maximal degree in co-relation 101538. Up to 16452 conditions per place. [2024-06-21 20:56:18,592 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 171 selfloop transitions, 43 changer transitions 0/223 dead transitions. [2024-06-21 20:56:18,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 223 transitions, 2116 flow [2024-06-21 20:56:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:56:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:56:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 20:56:18,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 20:56:18,594 INFO L175 Difference]: Start difference. First operand has 112 places, 160 transitions, 1242 flow. Second operand 9 states and 216 transitions. [2024-06-21 20:56:18,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 223 transitions, 2116 flow [2024-06-21 20:56:18,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 223 transitions, 2070 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 20:56:18,890 INFO L231 Difference]: Finished difference. Result has 120 places, 166 transitions, 1434 flow [2024-06-21 20:56:18,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1434, PETRI_PLACES=120, PETRI_TRANSITIONS=166} [2024-06-21 20:56:18,890 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-21 20:56:18,891 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 166 transitions, 1434 flow [2024-06-21 20:56:18,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:18,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:18,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:18,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:56:18,891 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:18,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1221998005, now seen corresponding path program 2 times [2024-06-21 20:56:18,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:18,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56612357] [2024-06-21 20:56:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:19,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:19,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56612357] [2024-06-21 20:56:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56612357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:19,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:19,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:19,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320572937] [2024-06-21 20:56:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:19,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:19,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:19,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:19,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 166 transitions, 1434 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:19,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:19,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:19,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:21,925 INFO L124 PetriNetUnfolderBase]: 12410/17295 cut-off events. [2024-06-21 20:56:21,926 INFO L125 PetriNetUnfolderBase]: For 447754/447882 co-relation queries the response was YES. [2024-06-21 20:56:22,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104503 conditions, 17295 events. 12410/17295 cut-off events. For 447754/447882 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95083 event pairs, 5571 based on Foata normal form. 14/17259 useless extension candidates. Maximal degree in co-relation 104455. Up to 16538 conditions per place. [2024-06-21 20:56:22,379 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 166 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-21 20:56:22,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 212 transitions, 1992 flow [2024-06-21 20:56:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:22,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:56:22,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-21 20:56:22,381 INFO L175 Difference]: Start difference. First operand has 120 places, 166 transitions, 1434 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:56:22,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 212 transitions, 1992 flow [2024-06-21 20:56:22,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 212 transitions, 1831 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 20:56:22,724 INFO L231 Difference]: Finished difference. Result has 123 places, 166 transitions, 1358 flow [2024-06-21 20:56:22,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=123, PETRI_TRANSITIONS=166} [2024-06-21 20:56:22,725 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-21 20:56:22,725 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 166 transitions, 1358 flow [2024-06-21 20:56:22,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:22,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:22,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:22,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:56:22,727 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:22,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 204841825, now seen corresponding path program 3 times [2024-06-21 20:56:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448557771] [2024-06-21 20:56:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:23,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:23,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448557771] [2024-06-21 20:56:23,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448557771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:23,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:23,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563585390] [2024-06-21 20:56:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:23,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:23,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:23,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:23,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 166 transitions, 1358 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:23,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:23,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:23,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:25,926 INFO L124 PetriNetUnfolderBase]: 12446/17346 cut-off events. [2024-06-21 20:56:25,927 INFO L125 PetriNetUnfolderBase]: For 477834/477962 co-relation queries the response was YES. [2024-06-21 20:56:26,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105861 conditions, 17346 events. 12446/17346 cut-off events. For 477834/477962 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95432 event pairs, 5584 based on Foata normal form. 10/17304 useless extension candidates. Maximal degree in co-relation 105811. Up to 16515 conditions per place. [2024-06-21 20:56:26,133 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 148 selfloop transitions, 53 changer transitions 0/210 dead transitions. [2024-06-21 20:56:26,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 210 transitions, 1962 flow [2024-06-21 20:56:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:56:26,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-21 20:56:26,135 INFO L175 Difference]: Start difference. First operand has 123 places, 166 transitions, 1358 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:56:26,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 210 transitions, 1962 flow [2024-06-21 20:56:26,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 210 transitions, 1878 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:26,485 INFO L231 Difference]: Finished difference. Result has 124 places, 169 transitions, 1470 flow [2024-06-21 20:56:26,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1470, PETRI_PLACES=124, PETRI_TRANSITIONS=169} [2024-06-21 20:56:26,487 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-21 20:56:26,487 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 169 transitions, 1470 flow [2024-06-21 20:56:26,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:26,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:26,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:26,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:56:26,487 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:26,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1838415505, now seen corresponding path program 1 times [2024-06-21 20:56:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131727401] [2024-06-21 20:56:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:27,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:27,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131727401] [2024-06-21 20:56:27,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131727401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:27,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:27,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321934590] [2024-06-21 20:56:27,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:27,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:27,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:27,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:27,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 169 transitions, 1470 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:27,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:27,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:27,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:30,325 INFO L124 PetriNetUnfolderBase]: 12563/17484 cut-off events. [2024-06-21 20:56:30,326 INFO L125 PetriNetUnfolderBase]: For 525351/525488 co-relation queries the response was YES. [2024-06-21 20:56:30,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109789 conditions, 17484 events. 12563/17484 cut-off events. For 525351/525488 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 95953 event pairs, 5293 based on Foata normal form. 18/17433 useless extension candidates. Maximal degree in co-relation 109738. Up to 16662 conditions per place. [2024-06-21 20:56:30,488 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 168 selfloop transitions, 42 changer transitions 0/219 dead transitions. [2024-06-21 20:56:30,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 219 transitions, 2114 flow [2024-06-21 20:56:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 20:56:30,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-21 20:56:30,490 INFO L175 Difference]: Start difference. First operand has 124 places, 169 transitions, 1470 flow. Second operand 8 states and 194 transitions. [2024-06-21 20:56:30,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 219 transitions, 2114 flow [2024-06-21 20:56:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 219 transitions, 1944 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:30,811 INFO L231 Difference]: Finished difference. Result has 126 places, 172 transitions, 1472 flow [2024-06-21 20:56:30,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1472, PETRI_PLACES=126, PETRI_TRANSITIONS=172} [2024-06-21 20:56:30,812 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 20:56:30,812 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 172 transitions, 1472 flow [2024-06-21 20:56:30,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:30,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:30,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:30,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:56:30,813 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:30,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash -283582066, now seen corresponding path program 1 times [2024-06-21 20:56:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:30,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499403783] [2024-06-21 20:56:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:31,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:31,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499403783] [2024-06-21 20:56:31,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499403783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:31,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:31,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:56:31,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723656789] [2024-06-21 20:56:31,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:31,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:56:31,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:31,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:56:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:56:31,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:56:31,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 172 transitions, 1472 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:31,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:31,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:56:31,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:33,941 INFO L124 PetriNetUnfolderBase]: 11891/16764 cut-off events. [2024-06-21 20:56:33,942 INFO L125 PetriNetUnfolderBase]: For 560943/561120 co-relation queries the response was YES. [2024-06-21 20:56:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109080 conditions, 16764 events. 11891/16764 cut-off events. For 560943/561120 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 94530 event pairs, 5503 based on Foata normal form. 19/16667 useless extension candidates. Maximal degree in co-relation 109028. Up to 15849 conditions per place. [2024-06-21 20:56:34,089 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 153 selfloop transitions, 28 changer transitions 0/199 dead transitions. [2024-06-21 20:56:34,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 199 transitions, 1972 flow [2024-06-21 20:56:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:56:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:56:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:56:34,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 20:56:34,091 INFO L175 Difference]: Start difference. First operand has 126 places, 172 transitions, 1472 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:56:34,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 199 transitions, 1972 flow [2024-06-21 20:56:34,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 199 transitions, 1826 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:34,460 INFO L231 Difference]: Finished difference. Result has 126 places, 176 transitions, 1469 flow [2024-06-21 20:56:34,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1469, PETRI_PLACES=126, PETRI_TRANSITIONS=176} [2024-06-21 20:56:34,460 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 20:56:34,461 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 176 transitions, 1469 flow [2024-06-21 20:56:34,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:34,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:34,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:34,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:56:34,461 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:34,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:34,462 INFO L85 PathProgramCache]: Analyzing trace with hash -499612191, now seen corresponding path program 4 times [2024-06-21 20:56:34,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:34,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973261340] [2024-06-21 20:56:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:34,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:35,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:35,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973261340] [2024-06-21 20:56:35,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973261340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:35,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:35,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:56:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120991451] [2024-06-21 20:56:35,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:35,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:56:35,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:35,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:56:35,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:56:35,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:35,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 176 transitions, 1469 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:35,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:35,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:35,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:38,062 INFO L124 PetriNetUnfolderBase]: 12580/17505 cut-off events. [2024-06-21 20:56:38,062 INFO L125 PetriNetUnfolderBase]: For 604274/604433 co-relation queries the response was YES. [2024-06-21 20:56:38,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116071 conditions, 17505 events. 12580/17505 cut-off events. For 604274/604433 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 95726 event pairs, 5544 based on Foata normal form. 6/17429 useless extension candidates. Maximal degree in co-relation 116018. Up to 16697 conditions per place. [2024-06-21 20:56:38,334 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 156 selfloop transitions, 53 changer transitions 0/218 dead transitions. [2024-06-21 20:56:38,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 218 transitions, 2095 flow [2024-06-21 20:56:38,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:56:38,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 20:56:38,336 INFO L175 Difference]: Start difference. First operand has 126 places, 176 transitions, 1469 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:56:38,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 218 transitions, 2095 flow [2024-06-21 20:56:38,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 218 transitions, 1996 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 20:56:38,812 INFO L231 Difference]: Finished difference. Result has 130 places, 179 transitions, 1578 flow [2024-06-21 20:56:38,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1578, PETRI_PLACES=130, PETRI_TRANSITIONS=179} [2024-06-21 20:56:38,815 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-21 20:56:38,815 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 179 transitions, 1578 flow [2024-06-21 20:56:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:38,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:38,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:38,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:56:38,816 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:38,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1841045189, now seen corresponding path program 2 times [2024-06-21 20:56:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:38,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574109506] [2024-06-21 20:56:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:38,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:40,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:40,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574109506] [2024-06-21 20:56:40,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574109506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:40,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:40,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:40,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66616076] [2024-06-21 20:56:40,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:40,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:40,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:40,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:40,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 1578 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:40,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:40,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:40,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:42,709 INFO L124 PetriNetUnfolderBase]: 12616/17562 cut-off events. [2024-06-21 20:56:42,709 INFO L125 PetriNetUnfolderBase]: For 654645/654820 co-relation queries the response was YES. [2024-06-21 20:56:42,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119469 conditions, 17562 events. 12616/17562 cut-off events. For 654645/654820 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96195 event pairs, 5257 based on Foata normal form. 20/17508 useless extension candidates. Maximal degree in co-relation 119415. Up to 16735 conditions per place. [2024-06-21 20:56:42,894 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 174 selfloop transitions, 43 changer transitions 0/226 dead transitions. [2024-06-21 20:56:42,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 226 transitions, 2240 flow [2024-06-21 20:56:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-21 20:56:42,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543269230769231 [2024-06-21 20:56:42,895 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 1578 flow. Second operand 8 states and 189 transitions. [2024-06-21 20:56:42,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 226 transitions, 2240 flow [2024-06-21 20:56:43,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 226 transitions, 2058 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:43,499 INFO L231 Difference]: Finished difference. Result has 132 places, 182 transitions, 1582 flow [2024-06-21 20:56:43,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1582, PETRI_PLACES=132, PETRI_TRANSITIONS=182} [2024-06-21 20:56:43,500 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-21 20:56:43,500 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 182 transitions, 1582 flow [2024-06-21 20:56:43,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:43,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:43,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:43,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:56:43,501 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:43,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:43,501 INFO L85 PathProgramCache]: Analyzing trace with hash -262955463, now seen corresponding path program 3 times [2024-06-21 20:56:43,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:43,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260636846] [2024-06-21 20:56:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:43,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:44,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:44,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260636846] [2024-06-21 20:56:44,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260636846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:44,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:44,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:44,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899194133] [2024-06-21 20:56:44,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:44,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:44,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:44,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:44,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 182 transitions, 1582 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:44,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:44,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:44,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:47,369 INFO L124 PetriNetUnfolderBase]: 12652/17614 cut-off events. [2024-06-21 20:56:47,369 INFO L125 PetriNetUnfolderBase]: For 703012/703187 co-relation queries the response was YES. [2024-06-21 20:56:47,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122715 conditions, 17614 events. 12652/17614 cut-off events. For 703012/703187 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96594 event pairs, 4997 based on Foata normal form. 20/17560 useless extension candidates. Maximal degree in co-relation 122660. Up to 16650 conditions per place. [2024-06-21 20:56:47,531 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 172 selfloop transitions, 54 changer transitions 0/235 dead transitions. [2024-06-21 20:56:47,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 235 transitions, 2532 flow [2024-06-21 20:56:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-21 20:56:47,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 20:56:47,533 INFO L175 Difference]: Start difference. First operand has 132 places, 182 transitions, 1582 flow. Second operand 8 states and 192 transitions. [2024-06-21 20:56:47,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 235 transitions, 2532 flow [2024-06-21 20:56:47,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 235 transitions, 2372 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:56:47,964 INFO L231 Difference]: Finished difference. Result has 134 places, 188 transitions, 1726 flow [2024-06-21 20:56:47,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1726, PETRI_PLACES=134, PETRI_TRANSITIONS=188} [2024-06-21 20:56:47,964 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-21 20:56:47,965 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 188 transitions, 1726 flow [2024-06-21 20:56:47,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:47,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:47,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:47,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:56:47,965 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:47,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:47,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1133802181, now seen corresponding path program 4 times [2024-06-21 20:56:47,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:47,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696365514] [2024-06-21 20:56:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:47,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:49,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:49,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696365514] [2024-06-21 20:56:49,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696365514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:49,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:49,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:56:49,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579204617] [2024-06-21 20:56:49,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:49,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:56:49,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:56:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:56:49,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 20:56:49,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 188 transitions, 1726 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:49,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:49,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 20:56:49,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:52,165 INFO L124 PetriNetUnfolderBase]: 12637/17593 cut-off events. [2024-06-21 20:56:52,165 INFO L125 PetriNetUnfolderBase]: For 752380/752555 co-relation queries the response was YES. [2024-06-21 20:56:52,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125259 conditions, 17593 events. 12637/17593 cut-off events. For 752380/752555 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96375 event pairs, 5254 based on Foata normal form. 20/17539 useless extension candidates. Maximal degree in co-relation 125203. Up to 16766 conditions per place. [2024-06-21 20:56:52,348 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 182 selfloop transitions, 42 changer transitions 0/233 dead transitions. [2024-06-21 20:56:52,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 233 transitions, 2320 flow [2024-06-21 20:56:52,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:56:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:56:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:56:52,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-21 20:56:52,349 INFO L175 Difference]: Start difference. First operand has 134 places, 188 transitions, 1726 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:56:52,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 233 transitions, 2320 flow [2024-06-21 20:56:52,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 233 transitions, 2122 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-21 20:56:52,846 INFO L231 Difference]: Finished difference. Result has 138 places, 188 transitions, 1622 flow [2024-06-21 20:56:52,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1622, PETRI_PLACES=138, PETRI_TRANSITIONS=188} [2024-06-21 20:56:52,847 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-21 20:56:52,847 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 188 transitions, 1622 flow [2024-06-21 20:56:52,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:52,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:52,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:52,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:56:52,848 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:52,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1443366430, now seen corresponding path program 2 times [2024-06-21 20:56:52,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:52,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359434316] [2024-06-21 20:56:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:52,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:53,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:53,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359434316] [2024-06-21 20:56:53,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359434316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:53,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:53,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:56:53,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705463963] [2024-06-21 20:56:53,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:56:53,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:53,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:56:53,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:56:53,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:56:53,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 188 transitions, 1622 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:53,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:53,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:56:53,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:55,912 INFO L124 PetriNetUnfolderBase]: 11903/16797 cut-off events. [2024-06-21 20:56:55,913 INFO L125 PetriNetUnfolderBase]: For 771770/771955 co-relation queries the response was YES. [2024-06-21 20:56:56,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120880 conditions, 16797 events. 11903/16797 cut-off events. For 771770/771955 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 94778 event pairs, 5510 based on Foata normal form. 15/16688 useless extension candidates. Maximal degree in co-relation 120822. Up to 15851 conditions per place. [2024-06-21 20:56:56,264 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 154 selfloop transitions, 35 changer transitions 0/210 dead transitions. [2024-06-21 20:56:56,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 210 transitions, 2136 flow [2024-06-21 20:56:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:56:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:56:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:56:56,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-21 20:56:56,265 INFO L175 Difference]: Start difference. First operand has 138 places, 188 transitions, 1622 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:56:56,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 210 transitions, 2136 flow [2024-06-21 20:56:56,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 210 transitions, 2024 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:56:56,756 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 1677 flow [2024-06-21 20:56:56,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1677, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2024-06-21 20:56:56,757 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-21 20:56:56,757 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 1677 flow [2024-06-21 20:56:56,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:56,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:56:56,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:56:56,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:56:56,758 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:56:56,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:56:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1449074398, now seen corresponding path program 1 times [2024-06-21 20:56:56,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:56:56,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25932894] [2024-06-21 20:56:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:56:56,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:56:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:56:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:56:57,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:56:57,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25932894] [2024-06-21 20:56:57,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25932894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:56:57,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:56:57,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:56:57,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677350098] [2024-06-21 20:56:57,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:56:57,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:56:57,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:56:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:56:57,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:56:57,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:56:57,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 1677 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:56:57,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:56:57,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:56:57,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:56:59,602 INFO L124 PetriNetUnfolderBase]: 10950/15830 cut-off events. [2024-06-21 20:56:59,602 INFO L125 PetriNetUnfolderBase]: For 702169/702353 co-relation queries the response was YES. [2024-06-21 20:56:59,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114295 conditions, 15830 events. 10950/15830 cut-off events. For 702169/702353 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 92066 event pairs, 4629 based on Foata normal form. 2/15741 useless extension candidates. Maximal degree in co-relation 114236. Up to 14757 conditions per place. [2024-06-21 20:56:59,768 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 193 selfloop transitions, 14 changer transitions 0/217 dead transitions. [2024-06-21 20:56:59,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 217 transitions, 2243 flow [2024-06-21 20:56:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:56:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:56:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 20:56:59,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 20:56:59,784 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 1677 flow. Second operand 6 states and 141 transitions. [2024-06-21 20:56:59,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 217 transitions, 2243 flow [2024-06-21 20:57:00,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 217 transitions, 2116 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 20:57:00,295 INFO L231 Difference]: Finished difference. Result has 139 places, 196 transitions, 1681 flow [2024-06-21 20:57:00,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1681, PETRI_PLACES=139, PETRI_TRANSITIONS=196} [2024-06-21 20:57:00,295 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-21 20:57:00,295 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 196 transitions, 1681 flow [2024-06-21 20:57:00,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:00,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:57:00,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:57:00,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:57:00,296 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:57:00,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:57:00,297 INFO L85 PathProgramCache]: Analyzing trace with hash -252018388, now seen corresponding path program 2 times [2024-06-21 20:57:00,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:57:00,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173876741] [2024-06-21 20:57:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:57:00,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:57:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:57:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:57:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:57:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173876741] [2024-06-21 20:57:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173876741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:57:01,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:57:01,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:57:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14797275] [2024-06-21 20:57:01,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:57:01,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:57:01,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:57:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:57:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:57:01,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:57:01,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 196 transitions, 1681 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:57:01,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:57:01,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:57:01,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand