./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe012_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe012_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe012_power.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-cde23df-m [2024-06-14 13:06:15,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:06:15,728 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:06:15,732 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:06:15,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:06:15,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:06:15,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:06:15,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:06:15,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:06:15,761 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:06:15,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:06:15,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:06:15,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:06:15,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:06:15,763 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:06:15,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:06:15,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:06:15,764 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:06:15,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:06:15,764 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:06:15,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:06:15,765 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:06:15,765 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:06:15,765 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:06:15,765 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:06:15,766 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:06:15,766 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:06:15,766 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:06:15,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:06:15,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:06:15,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:06:15,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:06:15,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:06:15,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:06:15,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:06:15,780 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:06:15,781 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:06:15,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:06:15,781 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:06:15,781 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:06:15,781 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:06:15,782 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:06:15,782 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:06:15,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:06:16,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:06:16,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:06:16,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:06:16,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:06:16,025 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:06:16,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i [2024-06-14 13:06:17,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:06:17,237 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:06:17,237 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_power.opt.i [2024-06-14 13:06:17,250 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/039b942eb/db599e0d23f741f49dda446b5744182d/FLAG50ff18488 [2024-06-14 13:06:17,261 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/039b942eb/db599e0d23f741f49dda446b5744182d [2024-06-14 13:06:17,263 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:06:17,264 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:06:17,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe012_power.opt.yml/witness.yml [2024-06-14 13:06:17,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:06:17,425 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:06:17,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:06:17,427 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:06:17,430 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:06:17,431 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:06:17" (1/2) ... [2024-06-14 13:06:17,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9f764c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:06:17, skipping insertion in model container [2024-06-14 13:06:17,432 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:06:17" (1/2) ... [2024-06-14 13:06:17,433 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1eabfd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:06:17, skipping insertion in model container [2024-06-14 13:06:17,433 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:06:17" (2/2) ... [2024-06-14 13:06:17,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9f764c5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:17, skipping insertion in model container [2024-06-14 13:06:17,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:06:17" (2/2) ... [2024-06-14 13:06:17,434 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:06:17,563 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:06:17,565 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & y) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:06:17,565 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & y) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:06:17,565 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & y) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:06:17,565 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:06:17,565 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-14 13:06:17,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:06:17,920 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:06:17,927 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:06:18,031 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:06:18,059 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:06:18,059 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18 WrapperNode [2024-06-14 13:06:18,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:06:18,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:06:18,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:06:18,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:06:18,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,118 INFO L138 Inliner]: procedures = 175, calls = 84, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 255 [2024-06-14 13:06:18,118 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:06:18,119 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:06:18,119 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:06:18,119 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:06:18,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,137 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,152 INFO L175 MemorySlicer]: Split 42 memory accesses to 2 slices as follows [2, 40]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-14 13:06:18,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,163 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,167 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:06:18,179 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:06:18,192 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:06:18,192 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:06:18,193 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (1/1) ... [2024-06-14 13:06:18,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:06:18,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:06:18,219 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) [2024-06-14 13:06:18,236 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 [2024-06-14 13:06:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:06:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:06:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:06:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:06:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:06:18,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:06:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:06:18,258 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:06:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:06:18,258 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:06:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:06:18,258 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:06:18,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:06:18,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:06:18,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:06:18,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:06:18,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:06:18,260 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:06:18,417 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:06:18,420 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:06:18,869 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:06:18,869 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:06:19,252 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:06:19,253 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:06:19,253 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:06:19 BoogieIcfgContainer [2024-06-14 13:06:19,254 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:06:19,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:06:19,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:06:19,258 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:06:19,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:06:17" (1/4) ... [2024-06-14 13:06:19,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37862d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:06:19, skipping insertion in model container [2024-06-14 13:06:19,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:06:17" (2/4) ... [2024-06-14 13:06:19,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37862d56 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:06:19, skipping insertion in model container [2024-06-14 13:06:19,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:18" (3/4) ... [2024-06-14 13:06:19,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37862d56 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:06:19, skipping insertion in model container [2024-06-14 13:06:19,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:06:19" (4/4) ... [2024-06-14 13:06:19,261 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_power.opt.i [2024-06-14 13:06:19,276 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:06:19,276 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:06:19,276 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:06:19,333 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:06:19,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:06:19,395 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 13:06:19,395 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:06:19,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:06:19,397 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:06:19,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 13:06:19,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:06:19,418 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;@669669c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:06:19,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:06:19,422 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:06:19,422 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:06:19,423 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:06:19,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:19,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:06:19,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:19,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:19,428 INFO L85 PathProgramCache]: Analyzing trace with hash -701445034, now seen corresponding path program 1 times [2024-06-14 13:06:19,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:19,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321630498] [2024-06-14 13:06:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:19,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:21,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:21,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321630498] [2024-06-14 13:06:21,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321630498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:21,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:21,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:06:21,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332482659] [2024-06-14 13:06:21,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:21,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:06:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:21,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:06:21,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:06:21,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:21,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:21,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:21,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:21,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:21,638 INFO L124 PetriNetUnfolderBase]: 788/1223 cut-off events. [2024-06-14 13:06:21,639 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-14 13:06:21,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 1223 events. 788/1223 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5915 event pairs, 460 based on Foata normal form. 1/1202 useless extension candidates. Maximal degree in co-relation 2474. Up to 1205 conditions per place. [2024-06-14 13:06:21,653 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 13:06:21,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 187 flow [2024-06-14 13:06:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:06:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:06:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-14 13:06:21,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-14 13:06:21,665 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 70 transitions. [2024-06-14 13:06:21,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 187 flow [2024-06-14 13:06:21,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:21,670 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 13:06:21,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 13:06:21,674 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 13:06:21,675 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 13:06:21,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:21,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:21,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:21,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:06:21,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:21,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1693317757, now seen corresponding path program 1 times [2024-06-14 13:06:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:21,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925168732] [2024-06-14 13:06:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:21,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:23,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:23,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925168732] [2024-06-14 13:06:23,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925168732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:23,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:23,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:06:23,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060649944] [2024-06-14 13:06:23,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:23,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:06:23,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:06:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:06:23,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:06:23,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:23,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:23,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:06:23,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:24,164 INFO L124 PetriNetUnfolderBase]: 1391/2104 cut-off events. [2024-06-14 13:06:24,165 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-14 13:06:24,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4839 conditions, 2104 events. 1391/2104 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9680 event pairs, 503 based on Foata normal form. 6/2109 useless extension candidates. Maximal degree in co-relation 4824. Up to 2006 conditions per place. [2024-06-14 13:06:24,177 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 45 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2024-06-14 13:06:24,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 250 flow [2024-06-14 13:06:24,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:06:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:06:24,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-06-14 13:06:24,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 13:06:24,182 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 82 transitions. [2024-06-14 13:06:24,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 250 flow [2024-06-14 13:06:24,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:06:24,185 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 127 flow [2024-06-14 13:06:24,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-06-14 13:06:24,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2024-06-14 13:06:24,188 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 127 flow [2024-06-14 13:06:24,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:24,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:24,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:24,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:06:24,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:24,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:24,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1729183418, now seen corresponding path program 1 times [2024-06-14 13:06:24,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:24,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223541719] [2024-06-14 13:06:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:24,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:25,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:25,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223541719] [2024-06-14 13:06:25,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223541719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:25,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:25,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:06:25,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990920223] [2024-06-14 13:06:25,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:25,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:06:25,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:25,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:06:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:06:25,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:25,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:25,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:25,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:25,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:26,358 INFO L124 PetriNetUnfolderBase]: 1080/1655 cut-off events. [2024-06-14 13:06:26,358 INFO L125 PetriNetUnfolderBase]: For 852/852 co-relation queries the response was YES. [2024-06-14 13:06:26,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4145 conditions, 1655 events. 1080/1655 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7826 event pairs, 500 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 4128. Up to 1618 conditions per place. [2024-06-14 13:06:26,366 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 45 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-14 13:06:26,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 291 flow [2024-06-14 13:06:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:06:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:06:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 13:06:26,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:06:26,368 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 127 flow. Second operand 5 states and 90 transitions. [2024-06-14 13:06:26,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 291 flow [2024-06-14 13:06:26,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 274 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:06:26,370 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 172 flow [2024-06-14 13:06:26,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-14 13:06:26,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-14 13:06:26,371 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 172 flow [2024-06-14 13:06:26,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:26,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:26,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:06:26,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:26,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:26,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2027543569, now seen corresponding path program 1 times [2024-06-14 13:06:26,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:26,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161825314] [2024-06-14 13:06:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:26,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161825314] [2024-06-14 13:06:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161825314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:28,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:28,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:06:28,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439304374] [2024-06-14 13:06:28,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:28,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:06:28,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:06:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:06:28,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:28,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:28,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:28,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:28,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:28,809 INFO L124 PetriNetUnfolderBase]: 1075/1648 cut-off events. [2024-06-14 13:06:28,809 INFO L125 PetriNetUnfolderBase]: For 1455/1455 co-relation queries the response was YES. [2024-06-14 13:06:28,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 1648 events. 1075/1648 cut-off events. For 1455/1455 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7777 event pairs, 482 based on Foata normal form. 2/1649 useless extension candidates. Maximal degree in co-relation 4548. Up to 1600 conditions per place. [2024-06-14 13:06:28,818 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-14 13:06:28,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 354 flow [2024-06-14 13:06:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:06:28,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:06:28,822 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 172 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:06:28,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 354 flow [2024-06-14 13:06:28,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 66 transitions, 348 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 13:06:28,825 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 216 flow [2024-06-14 13:06:28,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 13:06:28,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-06-14 13:06:28,826 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 216 flow [2024-06-14 13:06:28,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:28,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:28,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:28,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:06:28,826 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:28,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:28,827 INFO L85 PathProgramCache]: Analyzing trace with hash -407020487, now seen corresponding path program 1 times [2024-06-14 13:06:28,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:28,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905414656] [2024-06-14 13:06:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:30,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:30,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905414656] [2024-06-14 13:06:30,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905414656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:30,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:30,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626723956] [2024-06-14 13:06:30,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:30,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:30,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:30,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:30,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:31,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:31,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 216 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:31,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:31,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:31,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:31,847 INFO L124 PetriNetUnfolderBase]: 1070/1641 cut-off events. [2024-06-14 13:06:31,848 INFO L125 PetriNetUnfolderBase]: For 2308/2308 co-relation queries the response was YES. [2024-06-14 13:06:31,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5005 conditions, 1641 events. 1070/1641 cut-off events. For 2308/2308 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7728 event pairs, 464 based on Foata normal form. 2/1642 useless extension candidates. Maximal degree in co-relation 4982. Up to 1582 conditions per place. [2024-06-14 13:06:31,858 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 14 changer transitions 0/74 dead transitions. [2024-06-14 13:06:31,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 430 flow [2024-06-14 13:06:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:06:31,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:06:31,863 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 216 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:06:31,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 430 flow [2024-06-14 13:06:31,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 404 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 13:06:31,872 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 250 flow [2024-06-14 13:06:31,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=250, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-14 13:06:31,875 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 13:06:31,875 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 250 flow [2024-06-14 13:06:31,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:31,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:31,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:31,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:06:31,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:31,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1623220970, now seen corresponding path program 1 times [2024-06-14 13:06:31,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:31,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989924355] [2024-06-14 13:06:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:33,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:33,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989924355] [2024-06-14 13:06:33,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989924355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:33,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:33,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:33,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322269549] [2024-06-14 13:06:33,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:33,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:33,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:33,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:06:33,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 250 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:33,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:33,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:06:33,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:34,608 INFO L124 PetriNetUnfolderBase]: 1374/2087 cut-off events. [2024-06-14 13:06:34,608 INFO L125 PetriNetUnfolderBase]: For 4004/4004 co-relation queries the response was YES. [2024-06-14 13:06:34,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6728 conditions, 2087 events. 1374/2087 cut-off events. For 4004/4004 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9569 event pairs, 507 based on Foata normal form. 2/2088 useless extension candidates. Maximal degree in co-relation 6704. Up to 1982 conditions per place. [2024-06-14 13:06:34,622 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-06-14 13:06:34,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 438 flow [2024-06-14 13:06:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:06:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:06:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 13:06:34,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:06:34,624 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 250 flow. Second operand 5 states and 90 transitions. [2024-06-14 13:06:34,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 438 flow [2024-06-14 13:06:34,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 402 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:34,631 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 278 flow [2024-06-14 13:06:34,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-14 13:06:34,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 13:06:34,633 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 278 flow [2024-06-14 13:06:34,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:34,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:34,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:34,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:06:34,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:34,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1757168682, now seen corresponding path program 2 times [2024-06-14 13:06:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:34,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127349697] [2024-06-14 13:06:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:34,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:36,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:36,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127349697] [2024-06-14 13:06:36,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127349697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:36,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:36,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:36,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173555847] [2024-06-14 13:06:36,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:36,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:36,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:36,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:36,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:36,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:06:36,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 278 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:36,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:36,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:06:36,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:37,286 INFO L124 PetriNetUnfolderBase]: 1369/2080 cut-off events. [2024-06-14 13:06:37,286 INFO L125 PetriNetUnfolderBase]: For 5502/5502 co-relation queries the response was YES. [2024-06-14 13:06:37,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7161 conditions, 2080 events. 1369/2080 cut-off events. For 5502/5502 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9507 event pairs, 507 based on Foata normal form. 2/2081 useless extension candidates. Maximal degree in co-relation 7136. Up to 1964 conditions per place. [2024-06-14 13:06:37,299 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 57 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-14 13:06:37,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 500 flow [2024-06-14 13:06:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:37,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:06:37,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:06:37,301 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 278 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:06:37,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 500 flow [2024-06-14 13:06:37,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 460 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:37,308 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 310 flow [2024-06-14 13:06:37,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-14 13:06:37,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2024-06-14 13:06:37,309 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 310 flow [2024-06-14 13:06:37,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:37,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:37,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:37,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:06:37,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:37,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:37,310 INFO L85 PathProgramCache]: Analyzing trace with hash 267268676, now seen corresponding path program 1 times [2024-06-14 13:06:37,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:37,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861618247] [2024-06-14 13:06:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:37,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:39,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:39,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861618247] [2024-06-14 13:06:39,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861618247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:39,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:39,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:39,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611429742] [2024-06-14 13:06:39,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:39,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:39,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:39,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:39,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 310 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:39,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:39,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:39,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:40,754 INFO L124 PetriNetUnfolderBase]: 1070/1647 cut-off events. [2024-06-14 13:06:40,754 INFO L125 PetriNetUnfolderBase]: For 4955/4955 co-relation queries the response was YES. [2024-06-14 13:06:40,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5948 conditions, 1647 events. 1070/1647 cut-off events. For 4955/4955 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7764 event pairs, 427 based on Foata normal form. 4/1650 useless extension candidates. Maximal degree in co-relation 5922. Up to 1560 conditions per place. [2024-06-14 13:06:40,763 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-14 13:06:40,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 88 transitions, 570 flow [2024-06-14 13:06:40,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:40,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:06:40,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:06:40,765 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 310 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:06:40,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 88 transitions, 570 flow [2024-06-14 13:06:40,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 526 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:06:40,772 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 331 flow [2024-06-14 13:06:40,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2024-06-14 13:06:40,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 13:06:40,774 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 331 flow [2024-06-14 13:06:40,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:40,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:40,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:40,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:06:40,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:40,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -511683937, now seen corresponding path program 1 times [2024-06-14 13:06:40,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:40,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808364371] [2024-06-14 13:06:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:42,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:42,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808364371] [2024-06-14 13:06:42,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808364371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:42,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:42,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:42,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362835033] [2024-06-14 13:06:42,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:42,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:42,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:42,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:42,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:06:42,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 331 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:42,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:42,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:06:42,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:43,587 INFO L124 PetriNetUnfolderBase]: 1366/2081 cut-off events. [2024-06-14 13:06:43,588 INFO L125 PetriNetUnfolderBase]: For 7275/7275 co-relation queries the response was YES. [2024-06-14 13:06:43,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7597 conditions, 2081 events. 1366/2081 cut-off events. For 7275/7275 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9571 event pairs, 481 based on Foata normal form. 2/2082 useless extension candidates. Maximal degree in co-relation 7570. Up to 1931 conditions per place. [2024-06-14 13:06:43,627 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-14 13:06:43,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 569 flow [2024-06-14 13:06:43,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:06:43,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:06:43,630 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 331 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:06:43,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 569 flow [2024-06-14 13:06:43,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 522 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:43,640 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 368 flow [2024-06-14 13:06:43,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-14 13:06:43,643 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 13:06:43,643 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 368 flow [2024-06-14 13:06:43,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:43,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:43,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:43,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:06:43,649 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:43,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:43,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1768977727, now seen corresponding path program 2 times [2024-06-14 13:06:43,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:43,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361813031] [2024-06-14 13:06:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:43,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:45,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:45,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:45,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361813031] [2024-06-14 13:06:45,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361813031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:45,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:45,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:45,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887124045] [2024-06-14 13:06:45,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:45,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:45,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:45,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:45,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:45,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:06:45,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 368 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:45,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:45,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:06:45,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:46,362 INFO L124 PetriNetUnfolderBase]: 1379/2100 cut-off events. [2024-06-14 13:06:46,362 INFO L125 PetriNetUnfolderBase]: For 9308/9308 co-relation queries the response was YES. [2024-06-14 13:06:46,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8089 conditions, 2100 events. 1379/2100 cut-off events. For 9308/9308 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9670 event pairs, 481 based on Foata normal form. 2/2101 useless extension candidates. Maximal degree in co-relation 8061. Up to 1915 conditions per place. [2024-06-14 13:06:46,372 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-14 13:06:46,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 720 flow [2024-06-14 13:06:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:06:46,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:06:46,374 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 368 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:06:46,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 720 flow [2024-06-14 13:06:46,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 672 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:06:46,381 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 456 flow [2024-06-14 13:06:46,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-14 13:06:46,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-14 13:06:46,382 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 456 flow [2024-06-14 13:06:46,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:46,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:46,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:46,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:06:46,383 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:46,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:46,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1768983307, now seen corresponding path program 3 times [2024-06-14 13:06:46,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:46,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976752008] [2024-06-14 13:06:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:46,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:48,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:48,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976752008] [2024-06-14 13:06:48,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976752008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:48,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:48,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:48,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671875836] [2024-06-14 13:06:48,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:48,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:48,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:48,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:06:48,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 456 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:48,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:48,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:06:48,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:49,037 INFO L124 PetriNetUnfolderBase]: 1374/2093 cut-off events. [2024-06-14 13:06:49,037 INFO L125 PetriNetUnfolderBase]: For 11568/11568 co-relation queries the response was YES. [2024-06-14 13:06:49,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8498 conditions, 2093 events. 1374/2093 cut-off events. For 11568/11568 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9625 event pairs, 481 based on Foata normal form. 2/2094 useless extension candidates. Maximal degree in co-relation 8469. Up to 1960 conditions per place. [2024-06-14 13:06:49,048 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 70 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-14 13:06:49,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 696 flow [2024-06-14 13:06:49,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:06:49,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:06:49,050 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 456 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:06:49,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 696 flow [2024-06-14 13:06:49,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 632 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:49,059 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 438 flow [2024-06-14 13:06:49,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=438, PETRI_PLACES=72, PETRI_TRANSITIONS=67} [2024-06-14 13:06:49,060 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-14 13:06:49,060 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 438 flow [2024-06-14 13:06:49,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:49,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:49,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:49,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:06:49,060 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:49,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1011396313, now seen corresponding path program 1 times [2024-06-14 13:06:49,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:49,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087568097] [2024-06-14 13:06:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:49,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:50,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:50,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087568097] [2024-06-14 13:06:50,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087568097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:50,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:50,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:06:50,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877465613] [2024-06-14 13:06:50,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:50,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:06:50,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:50,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:06:50,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:06:50,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:50,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:50,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:50,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:50,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:51,587 INFO L124 PetriNetUnfolderBase]: 1000/1573 cut-off events. [2024-06-14 13:06:51,587 INFO L125 PetriNetUnfolderBase]: For 10136/10136 co-relation queries the response was YES. [2024-06-14 13:06:51,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6720 conditions, 1573 events. 1000/1573 cut-off events. For 10136/10136 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7233 event pairs, 422 based on Foata normal form. 2/1572 useless extension candidates. Maximal degree in co-relation 6689. Up to 1484 conditions per place. [2024-06-14 13:06:51,596 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 59 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-14 13:06:51,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 80 transitions, 620 flow [2024-06-14 13:06:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:06:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:06:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-14 13:06:51,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-14 13:06:51,597 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 438 flow. Second operand 5 states and 89 transitions. [2024-06-14 13:06:51,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 80 transitions, 620 flow [2024-06-14 13:06:51,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 80 transitions, 564 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:51,604 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 435 flow [2024-06-14 13:06:51,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=435, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-06-14 13:06:51,605 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 13:06:51,605 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 435 flow [2024-06-14 13:06:51,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:51,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:51,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:51,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:06:51,606 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:51,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:51,606 INFO L85 PathProgramCache]: Analyzing trace with hash -720186255, now seen corresponding path program 1 times [2024-06-14 13:06:51,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:51,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70233763] [2024-06-14 13:06:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:51,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:53,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:53,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70233763] [2024-06-14 13:06:53,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70233763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:53,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:53,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:53,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325571658] [2024-06-14 13:06:53,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:53,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:53,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:53,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:06:53,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 435 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:53,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:53,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:06:53,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:54,198 INFO L124 PetriNetUnfolderBase]: 1413/2157 cut-off events. [2024-06-14 13:06:54,198 INFO L125 PetriNetUnfolderBase]: For 15043/15043 co-relation queries the response was YES. [2024-06-14 13:06:54,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9310 conditions, 2157 events. 1413/2157 cut-off events. For 15043/15043 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9982 event pairs, 316 based on Foata normal form. 4/2160 useless extension candidates. Maximal degree in co-relation 9278. Up to 1952 conditions per place. [2024-06-14 13:06:54,210 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 81 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2024-06-14 13:06:54,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 799 flow [2024-06-14 13:06:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:06:54,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:06:54,212 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 435 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:06:54,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 799 flow [2024-06-14 13:06:54,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 104 transitions, 770 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:54,222 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 507 flow [2024-06-14 13:06:54,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=507, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2024-06-14 13:06:54,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-14 13:06:54,223 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 507 flow [2024-06-14 13:06:54,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:54,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:54,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:54,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:06:54,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:54,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash 625425925, now seen corresponding path program 2 times [2024-06-14 13:06:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:54,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413081223] [2024-06-14 13:06:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:54,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:55,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:55,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413081223] [2024-06-14 13:06:55,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413081223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:55,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:55,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:55,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163809639] [2024-06-14 13:06:55,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:55,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:56,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:06:56,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 507 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:56,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:56,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:06:56,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:56,902 INFO L124 PetriNetUnfolderBase]: 1405/2145 cut-off events. [2024-06-14 13:06:56,902 INFO L125 PetriNetUnfolderBase]: For 17200/17200 co-relation queries the response was YES. [2024-06-14 13:06:56,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9592 conditions, 2145 events. 1405/2145 cut-off events. For 17200/17200 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9892 event pairs, 442 based on Foata normal form. 4/2148 useless extension candidates. Maximal degree in co-relation 9559. Up to 2012 conditions per place. [2024-06-14 13:06:56,912 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 77 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2024-06-14 13:06:56,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 743 flow [2024-06-14 13:06:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:06:56,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:06:56,914 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 507 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:06:56,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 743 flow [2024-06-14 13:06:56,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 685 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:56,928 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 486 flow [2024-06-14 13:06:56,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=486, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-06-14 13:06:56,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-14 13:06:56,929 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 486 flow [2024-06-14 13:06:56,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:56,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:56,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:56,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:06:56,930 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:56,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:56,930 INFO L85 PathProgramCache]: Analyzing trace with hash 625430885, now seen corresponding path program 1 times [2024-06-14 13:06:56,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:56,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791941193] [2024-06-14 13:06:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:56,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:59,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:59,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791941193] [2024-06-14 13:06:59,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791941193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:59,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:59,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:59,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319084208] [2024-06-14 13:06:59,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:59,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:59,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:59,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:06:59,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 486 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:06:59,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:59,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:06:59,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:00,049 INFO L124 PetriNetUnfolderBase]: 1418/2170 cut-off events. [2024-06-14 13:07:00,049 INFO L125 PetriNetUnfolderBase]: For 19288/19288 co-relation queries the response was YES. [2024-06-14 13:07:00,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9843 conditions, 2170 events. 1418/2170 cut-off events. For 19288/19288 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10085 event pairs, 424 based on Foata normal form. 2/2171 useless extension candidates. Maximal degree in co-relation 9808. Up to 1975 conditions per place. [2024-06-14 13:07:00,059 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 25 changer transitions 0/105 dead transitions. [2024-06-14 13:07:00,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 794 flow [2024-06-14 13:07:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:00,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:07:00,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:07:00,061 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 486 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:07:00,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 794 flow [2024-06-14 13:07:00,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 759 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:00,075 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 559 flow [2024-06-14 13:07:00,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=559, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2024-06-14 13:07:00,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-14 13:07:00,076 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 559 flow [2024-06-14 13:07:00,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:00,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:00,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:00,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:07:00,076 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:00,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash 996089225, now seen corresponding path program 3 times [2024-06-14 13:07:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016541057] [2024-06-14 13:07:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:01,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:01,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016541057] [2024-06-14 13:07:01,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016541057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:01,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:01,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:01,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137842498] [2024-06-14 13:07:01,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:01,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:01,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:01,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:01,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:01,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 559 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:01,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:01,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:01,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:02,896 INFO L124 PetriNetUnfolderBase]: 1410/2158 cut-off events. [2024-06-14 13:07:02,896 INFO L125 PetriNetUnfolderBase]: For 22023/22023 co-relation queries the response was YES. [2024-06-14 13:07:02,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10232 conditions, 2158 events. 1410/2158 cut-off events. For 22023/22023 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10019 event pairs, 422 based on Foata normal form. 4/2161 useless extension candidates. Maximal degree in co-relation 10196. Up to 2008 conditions per place. [2024-06-14 13:07:02,906 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 84 selfloop transitions, 18 changer transitions 0/106 dead transitions. [2024-06-14 13:07:02,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 106 transitions, 859 flow [2024-06-14 13:07:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:07:02,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:07:02,908 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 559 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:07:02,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 106 transitions, 859 flow [2024-06-14 13:07:02,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 106 transitions, 787 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:02,924 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 566 flow [2024-06-14 13:07:02,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=566, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2024-06-14 13:07:02,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-14 13:07:02,925 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 566 flow [2024-06-14 13:07:02,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:02,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:02,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:02,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:07:02,925 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:02,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash 996273675, now seen corresponding path program 2 times [2024-06-14 13:07:02,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:02,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993760434] [2024-06-14 13:07:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:02,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:05,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:05,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993760434] [2024-06-14 13:07:05,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993760434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:05,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:05,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:05,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912588278] [2024-06-14 13:07:05,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:05,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:05,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:05,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:05,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:05,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:05,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 566 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:05,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:05,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:05,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:06,295 INFO L124 PetriNetUnfolderBase]: 1423/2177 cut-off events. [2024-06-14 13:07:06,295 INFO L125 PetriNetUnfolderBase]: For 25188/25188 co-relation queries the response was YES. [2024-06-14 13:07:06,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10566 conditions, 2177 events. 1423/2177 cut-off events. For 25188/25188 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10132 event pairs, 422 based on Foata normal form. 2/2178 useless extension candidates. Maximal degree in co-relation 10529. Up to 1919 conditions per place. [2024-06-14 13:07:06,307 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 82 selfloop transitions, 39 changer transitions 0/125 dead transitions. [2024-06-14 13:07:06,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 125 transitions, 1056 flow [2024-06-14 13:07:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:07:06,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:07:06,309 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 566 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:07:06,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 125 transitions, 1056 flow [2024-06-14 13:07:06,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 995 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:06,326 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 694 flow [2024-06-14 13:07:06,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=694, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2024-06-14 13:07:06,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-14 13:07:06,327 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 694 flow [2024-06-14 13:07:06,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:06,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:06,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:06,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:07:06,328 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:06,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:06,328 INFO L85 PathProgramCache]: Analyzing trace with hash 996094185, now seen corresponding path program 3 times [2024-06-14 13:07:06,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:06,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927290321] [2024-06-14 13:07:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:06,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:08,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927290321] [2024-06-14 13:07:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927290321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:08,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:08,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:08,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383973825] [2024-06-14 13:07:08,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:08,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:08,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:08,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:08,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:08,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 694 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:08,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:08,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:08,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:09,586 INFO L124 PetriNetUnfolderBase]: 1418/2170 cut-off events. [2024-06-14 13:07:09,587 INFO L125 PetriNetUnfolderBase]: For 28283/28283 co-relation queries the response was YES. [2024-06-14 13:07:09,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10931 conditions, 2170 events. 1418/2170 cut-off events. For 28283/28283 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10098 event pairs, 422 based on Foata normal form. 2/2171 useless extension candidates. Maximal degree in co-relation 10893. Up to 2020 conditions per place. [2024-06-14 13:07:09,597 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 22 changer transitions 0/116 dead transitions. [2024-06-14 13:07:09,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 116 transitions, 992 flow [2024-06-14 13:07:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:07:09,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:07:09,599 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 694 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:07:09,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 116 transitions, 992 flow [2024-06-14 13:07:09,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 116 transitions, 884 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:09,619 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 638 flow [2024-06-14 13:07:09,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=638, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2024-06-14 13:07:09,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-14 13:07:09,619 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 638 flow [2024-06-14 13:07:09,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:09,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:09,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:09,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:07:09,620 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:09,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1257235610, now seen corresponding path program 1 times [2024-06-14 13:07:09,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:09,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811602348] [2024-06-14 13:07:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:09,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:11,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:11,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811602348] [2024-06-14 13:07:11,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811602348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:11,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:11,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:07:11,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190714107] [2024-06-14 13:07:11,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:11,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:07:11,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:11,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:07:11,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:07:11,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:11,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 638 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:11,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:11,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:11,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:12,714 INFO L124 PetriNetUnfolderBase]: 1322/2075 cut-off events. [2024-06-14 13:07:12,714 INFO L125 PetriNetUnfolderBase]: For 29265/29265 co-relation queries the response was YES. [2024-06-14 13:07:12,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10492 conditions, 2075 events. 1322/2075 cut-off events. For 29265/29265 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9955 event pairs, 402 based on Foata normal form. 2/2077 useless extension candidates. Maximal degree in co-relation 10452. Up to 1960 conditions per place. [2024-06-14 13:07:12,726 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 85 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2024-06-14 13:07:12,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 106 transitions, 908 flow [2024-06-14 13:07:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:12,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 13:07:12,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:07:12,728 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 638 flow. Second operand 6 states and 98 transitions. [2024-06-14 13:07:12,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 106 transitions, 908 flow [2024-06-14 13:07:12,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 106 transitions, 842 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:12,747 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 672 flow [2024-06-14 13:07:12,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=672, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-06-14 13:07:12,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 13:07:12,748 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 672 flow [2024-06-14 13:07:12,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:12,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:12,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:12,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:07:12,749 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:12,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:12,749 INFO L85 PathProgramCache]: Analyzing trace with hash -426039926, now seen corresponding path program 1 times [2024-06-14 13:07:12,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:12,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874890597] [2024-06-14 13:07:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:12,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:14,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:14,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874890597] [2024-06-14 13:07:14,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874890597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:14,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:14,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:14,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181792075] [2024-06-14 13:07:14,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:14,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:14,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:14,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:14,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 672 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:14,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:14,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:14,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:15,718 INFO L124 PetriNetUnfolderBase]: 1432/2194 cut-off events. [2024-06-14 13:07:15,719 INFO L125 PetriNetUnfolderBase]: For 32685/32685 co-relation queries the response was YES. [2024-06-14 13:07:15,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11492 conditions, 2194 events. 1432/2194 cut-off events. For 32685/32685 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10212 event pairs, 256 based on Foata normal form. 4/2197 useless extension candidates. Maximal degree in co-relation 11449. Up to 1961 conditions per place. [2024-06-14 13:07:15,731 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 102 selfloop transitions, 23 changer transitions 0/129 dead transitions. [2024-06-14 13:07:15,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 129 transitions, 1038 flow [2024-06-14 13:07:15,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:15,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:07:15,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:07:15,734 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 672 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:07:15,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 129 transitions, 1038 flow [2024-06-14 13:07:15,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 1030 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-14 13:07:15,756 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 757 flow [2024-06-14 13:07:15,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=757, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2024-06-14 13:07:15,757 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-14 13:07:15,757 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 757 flow [2024-06-14 13:07:15,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:15,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:15,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:15,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:07:15,758 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:15,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash 495344422, now seen corresponding path program 2 times [2024-06-14 13:07:15,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:15,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870766479] [2024-06-14 13:07:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:15,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:17,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:17,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870766479] [2024-06-14 13:07:17,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870766479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:17,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:17,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:17,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635058150] [2024-06-14 13:07:17,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:17,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:17,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:17,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:17,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:17,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:17,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 757 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:17,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:17,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:17,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:18,599 INFO L124 PetriNetUnfolderBase]: 1452/2226 cut-off events. [2024-06-14 13:07:18,600 INFO L125 PetriNetUnfolderBase]: For 36578/36578 co-relation queries the response was YES. [2024-06-14 13:07:18,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12091 conditions, 2226 events. 1452/2226 cut-off events. For 36578/36578 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10381 event pairs, 384 based on Foata normal form. 4/2229 useless extension candidates. Maximal degree in co-relation 12045. Up to 2059 conditions per place. [2024-06-14 13:07:18,611 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 102 selfloop transitions, 19 changer transitions 0/125 dead transitions. [2024-06-14 13:07:18,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 125 transitions, 1105 flow [2024-06-14 13:07:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:07:18,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:07:18,613 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 757 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:07:18,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 125 transitions, 1105 flow [2024-06-14 13:07:18,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 125 transitions, 1030 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:18,637 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 771 flow [2024-06-14 13:07:18,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=771, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2024-06-14 13:07:18,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-14 13:07:18,638 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 771 flow [2024-06-14 13:07:18,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:18,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:18,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:18,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:07:18,639 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:18,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:18,639 INFO L85 PathProgramCache]: Analyzing trace with hash 495492292, now seen corresponding path program 3 times [2024-06-14 13:07:18,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:18,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971877396] [2024-06-14 13:07:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:20,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:20,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971877396] [2024-06-14 13:07:20,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971877396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:20,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:20,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044083269] [2024-06-14 13:07:20,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:20,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:20,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:20,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:20,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:20,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:20,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 771 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:20,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:20,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:20,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:21,613 INFO L124 PetriNetUnfolderBase]: 1472/2258 cut-off events. [2024-06-14 13:07:21,613 INFO L125 PetriNetUnfolderBase]: For 41100/41100 co-relation queries the response was YES. [2024-06-14 13:07:21,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12474 conditions, 2258 events. 1472/2258 cut-off events. For 41100/41100 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10590 event pairs, 390 based on Foata normal form. 4/2261 useless extension candidates. Maximal degree in co-relation 12427. Up to 2080 conditions per place. [2024-06-14 13:07:21,624 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 100 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-14 13:07:21,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 127 transitions, 1129 flow [2024-06-14 13:07:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:07:21,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:07:21,625 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 771 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:07:21,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 127 transitions, 1129 flow [2024-06-14 13:07:21,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 1058 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:21,648 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 801 flow [2024-06-14 13:07:21,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=801, PETRI_PLACES=100, PETRI_TRANSITIONS=100} [2024-06-14 13:07:21,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-14 13:07:21,649 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 801 flow [2024-06-14 13:07:21,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:21,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:21,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:21,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:07:21,650 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:21,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash 495498244, now seen corresponding path program 1 times [2024-06-14 13:07:21,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:21,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935515502] [2024-06-14 13:07:21,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:21,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:24,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:24,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935515502] [2024-06-14 13:07:24,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935515502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:24,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:24,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082177494] [2024-06-14 13:07:24,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:24,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:24,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:24,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 100 transitions, 801 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:24,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:24,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:24,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:25,034 INFO L124 PetriNetUnfolderBase]: 1540/2386 cut-off events. [2024-06-14 13:07:25,034 INFO L125 PetriNetUnfolderBase]: For 48769/48769 co-relation queries the response was YES. [2024-06-14 13:07:25,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13353 conditions, 2386 events. 1540/2386 cut-off events. For 48769/48769 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11515 event pairs, 353 based on Foata normal form. 16/2401 useless extension candidates. Maximal degree in co-relation 13305. Up to 2011 conditions per place. [2024-06-14 13:07:25,047 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 104 selfloop transitions, 30 changer transitions 0/138 dead transitions. [2024-06-14 13:07:25,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 138 transitions, 1219 flow [2024-06-14 13:07:25,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:07:25,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:07:25,048 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 801 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:07:25,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 138 transitions, 1219 flow [2024-06-14 13:07:25,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 138 transitions, 1136 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:25,077 INFO L231 Difference]: Finished difference. Result has 103 places, 101 transitions, 824 flow [2024-06-14 13:07:25,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=824, PETRI_PLACES=103, PETRI_TRANSITIONS=101} [2024-06-14 13:07:25,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-14 13:07:25,078 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 101 transitions, 824 flow [2024-06-14 13:07:25,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:25,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:25,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:25,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:07:25,078 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:25,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash 819506976, now seen corresponding path program 4 times [2024-06-14 13:07:25,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:25,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401479730] [2024-06-14 13:07:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:25,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:27,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:27,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401479730] [2024-06-14 13:07:27,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401479730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:27,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:27,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052158634] [2024-06-14 13:07:27,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:27,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:27,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:27,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 824 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:27,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:27,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:27,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:28,146 INFO L124 PetriNetUnfolderBase]: 1560/2418 cut-off events. [2024-06-14 13:07:28,147 INFO L125 PetriNetUnfolderBase]: For 50615/50615 co-relation queries the response was YES. [2024-06-14 13:07:28,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13735 conditions, 2418 events. 1560/2418 cut-off events. For 50615/50615 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11722 event pairs, 406 based on Foata normal form. 4/2421 useless extension candidates. Maximal degree in co-relation 13686. Up to 2195 conditions per place. [2024-06-14 13:07:28,160 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 100 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2024-06-14 13:07:28,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 1216 flow [2024-06-14 13:07:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:28,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:07:28,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:07:28,162 INFO L175 Difference]: Start difference. First operand has 103 places, 101 transitions, 824 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:07:28,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 1216 flow [2024-06-14 13:07:28,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 135 transitions, 1148 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:28,198 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 879 flow [2024-06-14 13:07:28,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=879, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2024-06-14 13:07:28,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-14 13:07:28,199 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 879 flow [2024-06-14 13:07:28,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:28,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:28,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:28,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:07:28,199 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:28,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:28,200 INFO L85 PathProgramCache]: Analyzing trace with hash 814000446, now seen corresponding path program 5 times [2024-06-14 13:07:28,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:28,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035003494] [2024-06-14 13:07:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:28,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:30,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:30,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035003494] [2024-06-14 13:07:30,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035003494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:30,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:30,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:30,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209145869] [2024-06-14 13:07:30,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:30,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:30,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:30,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 879 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:30,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:30,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:30,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:31,234 INFO L124 PetriNetUnfolderBase]: 1580/2450 cut-off events. [2024-06-14 13:07:31,234 INFO L125 PetriNetUnfolderBase]: For 54844/54844 co-relation queries the response was YES. [2024-06-14 13:07:31,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14154 conditions, 2450 events. 1580/2450 cut-off events. For 54844/54844 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11909 event pairs, 412 based on Foata normal form. 4/2453 useless extension candidates. Maximal degree in co-relation 14104. Up to 2277 conditions per place. [2024-06-14 13:07:31,249 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 109 selfloop transitions, 23 changer transitions 0/136 dead transitions. [2024-06-14 13:07:31,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 136 transitions, 1273 flow [2024-06-14 13:07:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:07:31,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:07:31,257 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 879 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:07:31,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 136 transitions, 1273 flow [2024-06-14 13:07:31,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 136 transitions, 1168 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:31,292 INFO L231 Difference]: Finished difference. Result has 107 places, 105 transitions, 885 flow [2024-06-14 13:07:31,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=885, PETRI_PLACES=107, PETRI_TRANSITIONS=105} [2024-06-14 13:07:31,293 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 13:07:31,293 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 105 transitions, 885 flow [2024-06-14 13:07:31,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:31,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:31,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:31,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:07:31,293 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:31,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash 813996726, now seen corresponding path program 6 times [2024-06-14 13:07:31,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:31,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802177225] [2024-06-14 13:07:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:31,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802177225] [2024-06-14 13:07:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802177225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:33,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006637417] [2024-06-14 13:07:33,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:33,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:33,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:33,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:33,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 105 transitions, 885 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:33,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:33,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:33,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:34,197 INFO L124 PetriNetUnfolderBase]: 1572/2438 cut-off events. [2024-06-14 13:07:34,198 INFO L125 PetriNetUnfolderBase]: For 57648/57648 co-relation queries the response was YES. [2024-06-14 13:07:34,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14093 conditions, 2438 events. 1572/2438 cut-off events. For 57648/57648 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11863 event pairs, 404 based on Foata normal form. 4/2441 useless extension candidates. Maximal degree in co-relation 14042. Up to 2248 conditions per place. [2024-06-14 13:07:34,212 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 113 selfloop transitions, 22 changer transitions 0/139 dead transitions. [2024-06-14 13:07:34,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 139 transitions, 1291 flow [2024-06-14 13:07:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:07:34,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 13:07:34,214 INFO L175 Difference]: Start difference. First operand has 107 places, 105 transitions, 885 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:07:34,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 139 transitions, 1291 flow [2024-06-14 13:07:34,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 139 transitions, 1198 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:34,252 INFO L231 Difference]: Finished difference. Result has 109 places, 107 transitions, 905 flow [2024-06-14 13:07:34,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=905, PETRI_PLACES=109, PETRI_TRANSITIONS=107} [2024-06-14 13:07:34,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 13:07:34,252 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 107 transitions, 905 flow [2024-06-14 13:07:34,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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) [2024-06-14 13:07:34,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:34,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:34,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:07:34,253 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:34,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash 819722178, now seen corresponding path program 2 times [2024-06-14 13:07:34,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:34,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974728607] [2024-06-14 13:07:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:34,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:36,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:36,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974728607] [2024-06-14 13:07:36,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974728607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:36,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:36,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585629569] [2024-06-14 13:07:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:36,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:36,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:36,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:36,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:36,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 107 transitions, 905 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:36,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:36,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:36,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:37,974 INFO L124 PetriNetUnfolderBase]: 1688/2638 cut-off events. [2024-06-14 13:07:37,974 INFO L125 PetriNetUnfolderBase]: For 71827/71827 co-relation queries the response was YES. [2024-06-14 13:07:37,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15678 conditions, 2638 events. 1688/2638 cut-off events. For 71827/71827 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13182 event pairs, 391 based on Foata normal form. 12/2649 useless extension candidates. Maximal degree in co-relation 15626. Up to 1856 conditions per place. [2024-06-14 13:07:37,992 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 47 changer transitions 0/156 dead transitions. [2024-06-14 13:07:37,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 156 transitions, 1543 flow [2024-06-14 13:07:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:07:37,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:07:37,994 INFO L175 Difference]: Start difference. First operand has 109 places, 107 transitions, 905 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:07:37,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 156 transitions, 1543 flow [2024-06-14 13:07:38,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 156 transitions, 1448 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:38,043 INFO L231 Difference]: Finished difference. Result has 112 places, 109 transitions, 996 flow [2024-06-14 13:07:38,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=996, PETRI_PLACES=112, PETRI_TRANSITIONS=109} [2024-06-14 13:07:38,044 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-14 13:07:38,044 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 109 transitions, 996 flow [2024-06-14 13:07:38,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:38,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:38,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:38,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:07:38,044 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:38,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash 819714738, now seen corresponding path program 3 times [2024-06-14 13:07:38,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:38,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078025795] [2024-06-14 13:07:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:38,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:40,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078025795] [2024-06-14 13:07:40,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078025795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:40,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:40,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:40,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001284653] [2024-06-14 13:07:40,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:40,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:40,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:40,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:40,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:40,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:40,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 109 transitions, 996 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:40,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:40,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:40,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:41,631 INFO L124 PetriNetUnfolderBase]: 1769/2773 cut-off events. [2024-06-14 13:07:41,632 INFO L125 PetriNetUnfolderBase]: For 81098/81098 co-relation queries the response was YES. [2024-06-14 13:07:41,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16682 conditions, 2773 events. 1769/2773 cut-off events. For 81098/81098 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14115 event pairs, 466 based on Foata normal form. 16/2788 useless extension candidates. Maximal degree in co-relation 16629. Up to 2388 conditions per place. [2024-06-14 13:07:41,647 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 106 selfloop transitions, 44 changer transitions 0/154 dead transitions. [2024-06-14 13:07:41,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 154 transitions, 1485 flow [2024-06-14 13:07:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:41,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:07:41,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:07:41,649 INFO L175 Difference]: Start difference. First operand has 112 places, 109 transitions, 996 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:07:41,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 154 transitions, 1485 flow [2024-06-14 13:07:41,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 154 transitions, 1402 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:41,701 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 1075 flow [2024-06-14 13:07:41,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1075, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2024-06-14 13:07:41,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-14 13:07:41,702 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 1075 flow [2024-06-14 13:07:41,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:41,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:41,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:41,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:07:41,703 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:41,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash 819512928, now seen corresponding path program 4 times [2024-06-14 13:07:41,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:41,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607265980] [2024-06-14 13:07:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:41,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:44,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:44,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607265980] [2024-06-14 13:07:44,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607265980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:44,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:44,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:44,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415093513] [2024-06-14 13:07:44,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:44,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:44,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:44,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:44,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 1075 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:44,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:44,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:44,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:45,415 INFO L124 PetriNetUnfolderBase]: 1837/2889 cut-off events. [2024-06-14 13:07:45,415 INFO L125 PetriNetUnfolderBase]: For 87586/87586 co-relation queries the response was YES. [2024-06-14 13:07:45,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17575 conditions, 2889 events. 1837/2889 cut-off events. For 87586/87586 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14935 event pairs, 478 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17520. Up to 2531 conditions per place. [2024-06-14 13:07:45,433 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 116 selfloop transitions, 34 changer transitions 0/154 dead transitions. [2024-06-14 13:07:45,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 154 transitions, 1539 flow [2024-06-14 13:07:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:07:45,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:07:45,434 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 1075 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:07:45,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 154 transitions, 1539 flow [2024-06-14 13:07:45,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 154 transitions, 1452 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:45,487 INFO L231 Difference]: Finished difference. Result has 120 places, 114 transitions, 1111 flow [2024-06-14 13:07:45,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1111, PETRI_PLACES=120, PETRI_TRANSITIONS=114} [2024-06-14 13:07:45,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-14 13:07:45,488 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 114 transitions, 1111 flow [2024-06-14 13:07:45,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:45,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:45,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:45,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:07:45,488 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:45,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash -748990552, now seen corresponding path program 5 times [2024-06-14 13:07:45,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:45,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411492832] [2024-06-14 13:07:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:47,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:47,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411492832] [2024-06-14 13:07:47,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411492832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:47,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:47,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:47,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038457538] [2024-06-14 13:07:47,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:47,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:48,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:48,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 114 transitions, 1111 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:48,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:48,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:48,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:49,322 INFO L124 PetriNetUnfolderBase]: 1877/2961 cut-off events. [2024-06-14 13:07:49,322 INFO L125 PetriNetUnfolderBase]: For 92124/92124 co-relation queries the response was YES. [2024-06-14 13:07:49,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17883 conditions, 2961 events. 1877/2961 cut-off events. For 92124/92124 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15529 event pairs, 494 based on Foata normal form. 16/2976 useless extension candidates. Maximal degree in co-relation 17827. Up to 2653 conditions per place. [2024-06-14 13:07:49,340 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 124 selfloop transitions, 26 changer transitions 0/154 dead transitions. [2024-06-14 13:07:49,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 154 transitions, 1573 flow [2024-06-14 13:07:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:07:49,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:07:49,342 INFO L175 Difference]: Start difference. First operand has 120 places, 114 transitions, 1111 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:07:49,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 154 transitions, 1573 flow [2024-06-14 13:07:49,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 154 transitions, 1468 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:49,409 INFO L231 Difference]: Finished difference. Result has 121 places, 115 transitions, 1115 flow [2024-06-14 13:07:49,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1115, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2024-06-14 13:07:49,410 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-14 13:07:49,410 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 1115 flow [2024-06-14 13:07:49,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:49,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:49,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:49,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:07:49,410 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:49,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:49,410 INFO L85 PathProgramCache]: Analyzing trace with hash -3635640, now seen corresponding path program 1 times [2024-06-14 13:07:49,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:49,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992837885] [2024-06-14 13:07:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:51,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:51,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992837885] [2024-06-14 13:07:51,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992837885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:51,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:51,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:07:51,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383023399] [2024-06-14 13:07:51,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:51,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:07:51,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:07:51,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:07:51,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:51,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 1115 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:51,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:51,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:51,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:52,448 INFO L124 PetriNetUnfolderBase]: 1772/2854 cut-off events. [2024-06-14 13:07:52,448 INFO L125 PetriNetUnfolderBase]: For 89393/89393 co-relation queries the response was YES. [2024-06-14 13:07:52,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17521 conditions, 2854 events. 1772/2854 cut-off events. For 89393/89393 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15218 event pairs, 476 based on Foata normal form. 2/2855 useless extension candidates. Maximal degree in co-relation 17464. Up to 2743 conditions per place. [2024-06-14 13:07:52,469 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 113 selfloop transitions, 19 changer transitions 0/140 dead transitions. [2024-06-14 13:07:52,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 140 transitions, 1545 flow [2024-06-14 13:07:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:07:52,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:07:52,471 INFO L175 Difference]: Start difference. First operand has 121 places, 115 transitions, 1115 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:07:52,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 140 transitions, 1545 flow [2024-06-14 13:07:52,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 140 transitions, 1474 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:52,551 INFO L231 Difference]: Finished difference. Result has 121 places, 124 transitions, 1177 flow [2024-06-14 13:07:52,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1177, PETRI_PLACES=121, PETRI_TRANSITIONS=124} [2024-06-14 13:07:52,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-14 13:07:52,551 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 124 transitions, 1177 flow [2024-06-14 13:07:52,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:52,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:52,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:52,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:07:52,552 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:52,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1321463200, now seen corresponding path program 2 times [2024-06-14 13:07:52,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:52,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576760949] [2024-06-14 13:07:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:52,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:54,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576760949] [2024-06-14 13:07:54,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576760949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:54,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:54,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:07:54,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041270395] [2024-06-14 13:07:54,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:54,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:07:54,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:54,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:07:54,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:07:54,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:54,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 124 transitions, 1177 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:54,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:54,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:54,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:55,672 INFO L124 PetriNetUnfolderBase]: 1763/2845 cut-off events. [2024-06-14 13:07:55,672 INFO L125 PetriNetUnfolderBase]: For 90715/90734 co-relation queries the response was YES. [2024-06-14 13:07:55,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17629 conditions, 2845 events. 1763/2845 cut-off events. For 90715/90734 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15182 event pairs, 478 based on Foata normal form. 15/2859 useless extension candidates. Maximal degree in co-relation 17570. Up to 2738 conditions per place. [2024-06-14 13:07:55,691 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 108 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-06-14 13:07:55,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 135 transitions, 1457 flow [2024-06-14 13:07:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 13:07:55,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:07:55,693 INFO L175 Difference]: Start difference. First operand has 121 places, 124 transitions, 1177 flow. Second operand 6 states and 99 transitions. [2024-06-14 13:07:55,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 135 transitions, 1457 flow [2024-06-14 13:07:55,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 135 transitions, 1413 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 13:07:55,764 INFO L231 Difference]: Finished difference. Result has 126 places, 124 transitions, 1178 flow [2024-06-14 13:07:55,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1178, PETRI_PLACES=126, PETRI_TRANSITIONS=124} [2024-06-14 13:07:55,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-14 13:07:55,765 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 124 transitions, 1178 flow [2024-06-14 13:07:55,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:55,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:55,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:55,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:07:55,765 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:55,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:55,766 INFO L85 PathProgramCache]: Analyzing trace with hash -322333964, now seen corresponding path program 1 times [2024-06-14 13:07:55,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:55,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930174543] [2024-06-14 13:07:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:55,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:58,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:58,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930174543] [2024-06-14 13:07:58,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930174543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:58,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:58,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:07:58,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262269518] [2024-06-14 13:07:58,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:58,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:07:58,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:58,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:07:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:07:58,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:07:58,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 124 transitions, 1178 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:58,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:58,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:07:58,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:59,490 INFO L124 PetriNetUnfolderBase]: 1929/3051 cut-off events. [2024-06-14 13:07:59,490 INFO L125 PetriNetUnfolderBase]: For 102219/102219 co-relation queries the response was YES. [2024-06-14 13:07:59,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18583 conditions, 3051 events. 1929/3051 cut-off events. For 102219/102219 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16069 event pairs, 314 based on Foata normal form. 12/3062 useless extension candidates. Maximal degree in co-relation 18521. Up to 2722 conditions per place. [2024-06-14 13:07:59,513 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 138 selfloop transitions, 24 changer transitions 0/166 dead transitions. [2024-06-14 13:07:59,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 166 transitions, 1650 flow [2024-06-14 13:07:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:07:59,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:07:59,515 INFO L175 Difference]: Start difference. First operand has 126 places, 124 transitions, 1178 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:07:59,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 166 transitions, 1650 flow [2024-06-14 13:07:59,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 166 transitions, 1603 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:59,585 INFO L231 Difference]: Finished difference. Result has 130 places, 125 transitions, 1231 flow [2024-06-14 13:07:59,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1231, PETRI_PLACES=130, PETRI_TRANSITIONS=125} [2024-06-14 13:07:59,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 13:07:59,585 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 125 transitions, 1231 flow [2024-06-14 13:07:59,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:59,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:59,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:59,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:07:59,586 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:59,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1824190248, now seen corresponding path program 2 times [2024-06-14 13:07:59,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:59,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126432823] [2024-06-14 13:07:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:59,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:01,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:01,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126432823] [2024-06-14 13:08:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126432823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473632135] [2024-06-14 13:08:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:01,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:01,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:01,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:01,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:08:01,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 1231 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:01,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:01,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:08:01,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:03,106 INFO L124 PetriNetUnfolderBase]: 1977/3135 cut-off events. [2024-06-14 13:08:03,107 INFO L125 PetriNetUnfolderBase]: For 110010/110010 co-relation queries the response was YES. [2024-06-14 13:08:03,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19288 conditions, 3135 events. 1977/3135 cut-off events. For 110010/110010 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16845 event pairs, 492 based on Foata normal form. 12/3146 useless extension candidates. Maximal degree in co-relation 19226. Up to 2872 conditions per place. [2024-06-14 13:08:03,124 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 137 selfloop transitions, 20 changer transitions 0/161 dead transitions. [2024-06-14 13:08:03,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 161 transitions, 1681 flow [2024-06-14 13:08:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:08:03,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:08:03,126 INFO L175 Difference]: Start difference. First operand has 130 places, 125 transitions, 1231 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:08:03,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 161 transitions, 1681 flow [2024-06-14 13:08:03,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 161 transitions, 1599 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:03,210 INFO L231 Difference]: Finished difference. Result has 131 places, 126 transitions, 1243 flow [2024-06-14 13:08:03,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1243, PETRI_PLACES=131, PETRI_TRANSITIONS=126} [2024-06-14 13:08:03,210 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-14 13:08:03,210 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 126 transitions, 1243 flow [2024-06-14 13:08:03,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:03,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:03,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:03,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:08:03,210 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:03,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash -256465178, now seen corresponding path program 3 times [2024-06-14 13:08:03,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:03,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242680634] [2024-06-14 13:08:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:03,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:05,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:05,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242680634] [2024-06-14 13:08:05,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242680634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:05,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:05,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569851096] [2024-06-14 13:08:05,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:05,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:05,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:05,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:05,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:08:05,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 126 transitions, 1243 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:05,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:05,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:08:05,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:06,795 INFO L124 PetriNetUnfolderBase]: 1957/3103 cut-off events. [2024-06-14 13:08:06,796 INFO L125 PetriNetUnfolderBase]: For 109887/109887 co-relation queries the response was YES. [2024-06-14 13:08:06,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18664 conditions, 3103 events. 1957/3103 cut-off events. For 109887/109887 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16640 event pairs, 484 based on Foata normal form. 12/3114 useless extension candidates. Maximal degree in co-relation 18601. Up to 2829 conditions per place. [2024-06-14 13:08:06,817 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 133 selfloop transitions, 24 changer transitions 0/161 dead transitions. [2024-06-14 13:08:06,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 161 transitions, 1649 flow [2024-06-14 13:08:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:08:06,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:08:06,819 INFO L175 Difference]: Start difference. First operand has 131 places, 126 transitions, 1243 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:08:06,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 161 transitions, 1649 flow [2024-06-14 13:08:06,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 161 transitions, 1561 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:06,923 INFO L231 Difference]: Finished difference. Result has 133 places, 126 transitions, 1209 flow [2024-06-14 13:08:06,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1209, PETRI_PLACES=133, PETRI_TRANSITIONS=126} [2024-06-14 13:08:06,923 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 13:08:06,923 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 126 transitions, 1209 flow [2024-06-14 13:08:06,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:06,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:06,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:06,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:08:06,924 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:06,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1748637260, now seen corresponding path program 4 times [2024-06-14 13:08:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:06,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011901279] [2024-06-14 13:08:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:06,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:09,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:09,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011901279] [2024-06-14 13:08:09,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011901279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:09,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:09,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:09,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448609513] [2024-06-14 13:08:09,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:09,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:09,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:09,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:08:09,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 126 transitions, 1209 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:09,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:09,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:08:09,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:10,607 INFO L124 PetriNetUnfolderBase]: 1937/3071 cut-off events. [2024-06-14 13:08:10,607 INFO L125 PetriNetUnfolderBase]: For 105301/105301 co-relation queries the response was YES. [2024-06-14 13:08:10,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17966 conditions, 3071 events. 1937/3071 cut-off events. For 105301/105301 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16378 event pairs, 464 based on Foata normal form. 12/3082 useless extension candidates. Maximal degree in co-relation 17902. Up to 2797 conditions per place. [2024-06-14 13:08:10,624 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 138 selfloop transitions, 23 changer transitions 0/165 dead transitions. [2024-06-14 13:08:10,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 165 transitions, 1571 flow [2024-06-14 13:08:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:08:10,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:08:10,625 INFO L175 Difference]: Start difference. First operand has 133 places, 126 transitions, 1209 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:08:10,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 165 transitions, 1571 flow [2024-06-14 13:08:10,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 165 transitions, 1477 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:10,710 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 1103 flow [2024-06-14 13:08:10,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1103, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2024-06-14 13:08:10,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-14 13:08:10,710 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 1103 flow [2024-06-14 13:08:10,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:10,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:10,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:10,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:08:10,711 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:10,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1782889279, now seen corresponding path program 1 times [2024-06-14 13:08:10,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:10,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745681059] [2024-06-14 13:08:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:10,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:12,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:12,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745681059] [2024-06-14 13:08:12,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745681059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:12,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:12,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:12,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125245698] [2024-06-14 13:08:12,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:12,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:12,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:12,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:12,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 1103 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:12,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:12,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:12,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:13,987 INFO L124 PetriNetUnfolderBase]: 1861/2982 cut-off events. [2024-06-14 13:08:13,987 INFO L125 PetriNetUnfolderBase]: For 104299/104299 co-relation queries the response was YES. [2024-06-14 13:08:13,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17472 conditions, 2982 events. 1861/2982 cut-off events. For 104299/104299 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16250 event pairs, 471 based on Foata normal form. 4/2976 useless extension candidates. Maximal degree in co-relation 17407. Up to 2815 conditions per place. [2024-06-14 13:08:14,008 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 105 selfloop transitions, 22 changer transitions 0/140 dead transitions. [2024-06-14 13:08:14,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 140 transitions, 1417 flow [2024-06-14 13:08:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:08:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:08:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 13:08:14,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:08:14,010 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 1103 flow. Second operand 6 states and 100 transitions. [2024-06-14 13:08:14,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 140 transitions, 1417 flow [2024-06-14 13:08:14,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 140 transitions, 1304 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 13:08:14,084 INFO L231 Difference]: Finished difference. Result has 132 places, 128 transitions, 1083 flow [2024-06-14 13:08:14,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1083, PETRI_PLACES=132, PETRI_TRANSITIONS=128} [2024-06-14 13:08:14,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-14 13:08:14,085 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 128 transitions, 1083 flow [2024-06-14 13:08:14,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:14,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:14,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:14,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:08:14,085 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:14,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:14,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1313483583, now seen corresponding path program 2 times [2024-06-14 13:08:14,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:14,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238702005] [2024-06-14 13:08:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:14,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:16,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:16,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238702005] [2024-06-14 13:08:16,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238702005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:16,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:16,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:16,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753267454] [2024-06-14 13:08:16,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:16,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:16,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:16,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:16,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 128 transitions, 1083 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:16,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:16,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:16,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:17,682 INFO L124 PetriNetUnfolderBase]: 1849/2966 cut-off events. [2024-06-14 13:08:17,682 INFO L125 PetriNetUnfolderBase]: For 103780/103780 co-relation queries the response was YES. [2024-06-14 13:08:17,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17257 conditions, 2966 events. 1849/2966 cut-off events. For 103780/103780 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16141 event pairs, 469 based on Foata normal form. 4/2960 useless extension candidates. Maximal degree in co-relation 17192. Up to 2793 conditions per place. [2024-06-14 13:08:17,702 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 107 selfloop transitions, 25 changer transitions 0/145 dead transitions. [2024-06-14 13:08:17,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 145 transitions, 1417 flow [2024-06-14 13:08:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:08:17,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 13:08:17,703 INFO L175 Difference]: Start difference. First operand has 132 places, 128 transitions, 1083 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:08:17,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 145 transitions, 1417 flow [2024-06-14 13:08:17,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 145 transitions, 1350 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:17,767 INFO L231 Difference]: Finished difference. Result has 135 places, 131 transitions, 1116 flow [2024-06-14 13:08:17,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1116, PETRI_PLACES=135, PETRI_TRANSITIONS=131} [2024-06-14 13:08:17,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-14 13:08:17,767 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 131 transitions, 1116 flow [2024-06-14 13:08:17,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:17,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:17,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:08:17,767 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:17,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1140163231, now seen corresponding path program 1 times [2024-06-14 13:08:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:17,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680283434] [2024-06-14 13:08:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:20,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680283434] [2024-06-14 13:08:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680283434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:20,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:20,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:20,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006014106] [2024-06-14 13:08:20,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:20,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:20,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:20,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:20,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 131 transitions, 1116 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:20,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:20,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:20,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:21,642 INFO L124 PetriNetUnfolderBase]: 1838/2974 cut-off events. [2024-06-14 13:08:21,642 INFO L125 PetriNetUnfolderBase]: For 104144/104146 co-relation queries the response was YES. [2024-06-14 13:08:21,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17617 conditions, 2974 events. 1838/2974 cut-off events. For 104144/104146 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16075 event pairs, 466 based on Foata normal form. 2/2971 useless extension candidates. Maximal degree in co-relation 17551. Up to 2852 conditions per place. [2024-06-14 13:08:21,661 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 130 selfloop transitions, 16 changer transitions 0/154 dead transitions. [2024-06-14 13:08:21,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 154 transitions, 1492 flow [2024-06-14 13:08:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:08:21,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 13:08:21,662 INFO L175 Difference]: Start difference. First operand has 135 places, 131 transitions, 1116 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:08:21,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 154 transitions, 1492 flow [2024-06-14 13:08:21,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 154 transitions, 1418 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:21,732 INFO L231 Difference]: Finished difference. Result has 137 places, 134 transitions, 1122 flow [2024-06-14 13:08:21,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1122, PETRI_PLACES=137, PETRI_TRANSITIONS=134} [2024-06-14 13:08:21,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-14 13:08:21,732 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 134 transitions, 1122 flow [2024-06-14 13:08:21,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:21,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:21,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:21,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:08:21,733 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:21,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:21,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1310985817, now seen corresponding path program 1 times [2024-06-14 13:08:21,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:21,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321684917] [2024-06-14 13:08:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:21,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:24,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:24,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321684917] [2024-06-14 13:08:24,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321684917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:24,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:24,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:24,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639064221] [2024-06-14 13:08:24,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:24,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:24,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:08:24,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 134 transitions, 1122 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:24,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:24,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:08:24,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:25,346 INFO L124 PetriNetUnfolderBase]: 1965/3118 cut-off events. [2024-06-14 13:08:25,346 INFO L125 PetriNetUnfolderBase]: For 108975/108975 co-relation queries the response was YES. [2024-06-14 13:08:25,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18388 conditions, 3118 events. 1965/3118 cut-off events. For 108975/108975 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16682 event pairs, 465 based on Foata normal form. 2/3120 useless extension candidates. Maximal degree in co-relation 18321. Up to 3014 conditions per place. [2024-06-14 13:08:25,365 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 142 selfloop transitions, 21 changer transitions 0/167 dead transitions. [2024-06-14 13:08:25,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 167 transitions, 1666 flow [2024-06-14 13:08:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:08:25,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 13:08:25,367 INFO L175 Difference]: Start difference. First operand has 137 places, 134 transitions, 1122 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:08:25,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 167 transitions, 1666 flow [2024-06-14 13:08:25,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 167 transitions, 1604 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:25,456 INFO L231 Difference]: Finished difference. Result has 141 places, 146 transitions, 1230 flow [2024-06-14 13:08:25,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1230, PETRI_PLACES=141, PETRI_TRANSITIONS=146} [2024-06-14 13:08:25,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-14 13:08:25,457 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 146 transitions, 1230 flow [2024-06-14 13:08:25,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:25,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:25,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:25,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:08:25,457 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:25,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash -112703497, now seen corresponding path program 2 times [2024-06-14 13:08:25,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:25,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043449286] [2024-06-14 13:08:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:25,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:27,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:27,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043449286] [2024-06-14 13:08:27,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043449286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:27,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:27,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:27,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325092757] [2024-06-14 13:08:27,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:27,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:27,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:27,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:27,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:27,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:27,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 146 transitions, 1230 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:27,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:27,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:27,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:28,597 INFO L124 PetriNetUnfolderBase]: 1879/3023 cut-off events. [2024-06-14 13:08:28,598 INFO L125 PetriNetUnfolderBase]: For 114805/114807 co-relation queries the response was YES. [2024-06-14 13:08:28,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18403 conditions, 3023 events. 1879/3023 cut-off events. For 114805/114807 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16337 event pairs, 467 based on Foata normal form. 2/3020 useless extension candidates. Maximal degree in co-relation 18333. Up to 2878 conditions per place. [2024-06-14 13:08:28,621 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 127 selfloop transitions, 27 changer transitions 0/165 dead transitions. [2024-06-14 13:08:28,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 165 transitions, 1618 flow [2024-06-14 13:08:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:28,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:08:28,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 13:08:28,622 INFO L175 Difference]: Start difference. First operand has 141 places, 146 transitions, 1230 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:08:28,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 165 transitions, 1618 flow [2024-06-14 13:08:28,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 165 transitions, 1578 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:28,709 INFO L231 Difference]: Finished difference. Result has 145 places, 149 transitions, 1299 flow [2024-06-14 13:08:28,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1299, PETRI_PLACES=145, PETRI_TRANSITIONS=149} [2024-06-14 13:08:28,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-14 13:08:28,711 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 149 transitions, 1299 flow [2024-06-14 13:08:28,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:28,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:28,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:28,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:08:28,711 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:28,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1984312231, now seen corresponding path program 2 times [2024-06-14 13:08:28,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:28,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340766737] [2024-06-14 13:08:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:30,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:30,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340766737] [2024-06-14 13:08:30,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340766737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:30,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:30,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:30,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712053935] [2024-06-14 13:08:30,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:30,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:30,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:30,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:08:30,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 149 transitions, 1299 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:30,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:30,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:08:30,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:32,280 INFO L124 PetriNetUnfolderBase]: 1985/3147 cut-off events. [2024-06-14 13:08:32,281 INFO L125 PetriNetUnfolderBase]: For 120574/120582 co-relation queries the response was YES. [2024-06-14 13:08:32,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19246 conditions, 3147 events. 1985/3147 cut-off events. For 120574/120582 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16857 event pairs, 467 based on Foata normal form. 10/3157 useless extension candidates. Maximal degree in co-relation 19175. Up to 3038 conditions per place. [2024-06-14 13:08:32,302 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 141 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-14 13:08:32,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 170 transitions, 1786 flow [2024-06-14 13:08:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:08:32,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-14 13:08:32,303 INFO L175 Difference]: Start difference. First operand has 145 places, 149 transitions, 1299 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:08:32,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 170 transitions, 1786 flow [2024-06-14 13:08:32,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 170 transitions, 1699 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:32,389 INFO L231 Difference]: Finished difference. Result has 148 places, 154 transitions, 1318 flow [2024-06-14 13:08:32,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1318, PETRI_PLACES=148, PETRI_TRANSITIONS=154} [2024-06-14 13:08:32,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-14 13:08:32,389 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 154 transitions, 1318 flow [2024-06-14 13:08:32,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:32,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:32,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:32,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:08:32,390 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:32,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:32,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1313489535, now seen corresponding path program 3 times [2024-06-14 13:08:32,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:32,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503393784] [2024-06-14 13:08:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:32,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:34,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:34,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503393784] [2024-06-14 13:08:34,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503393784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:34,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:34,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:34,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031086828] [2024-06-14 13:08:34,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:34,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:34,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:08:34,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 1318 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:34,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:34,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:08:34,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:35,956 INFO L124 PetriNetUnfolderBase]: 1979/3139 cut-off events. [2024-06-14 13:08:35,956 INFO L125 PetriNetUnfolderBase]: For 124197/124205 co-relation queries the response was YES. [2024-06-14 13:08:35,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19235 conditions, 3139 events. 1979/3139 cut-off events. For 124197/124205 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16810 event pairs, 467 based on Foata normal form. 10/3149 useless extension candidates. Maximal degree in co-relation 19162. Up to 3033 conditions per place. [2024-06-14 13:08:35,976 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 138 selfloop transitions, 27 changer transitions 0/169 dead transitions. [2024-06-14 13:08:35,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 169 transitions, 1688 flow [2024-06-14 13:08:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 13:08:35,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554817275747508 [2024-06-14 13:08:35,978 INFO L175 Difference]: Start difference. First operand has 148 places, 154 transitions, 1318 flow. Second operand 7 states and 107 transitions. [2024-06-14 13:08:35,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 169 transitions, 1688 flow [2024-06-14 13:08:36,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 169 transitions, 1628 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:36,081 INFO L231 Difference]: Finished difference. Result has 152 places, 155 transitions, 1326 flow [2024-06-14 13:08:36,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1326, PETRI_PLACES=152, PETRI_TRANSITIONS=155} [2024-06-14 13:08:36,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 13:08:36,082 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 155 transitions, 1326 flow [2024-06-14 13:08:36,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:36,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:36,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:36,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:08:36,082 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:36,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1313252199, now seen corresponding path program 3 times [2024-06-14 13:08:36,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:36,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793146523] [2024-06-14 13:08:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:36,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:38,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793146523] [2024-06-14 13:08:38,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793146523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:38,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:38,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:08:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517160385] [2024-06-14 13:08:38,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:38,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:08:38,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:38,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:08:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:08:38,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:38,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 155 transitions, 1326 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:38,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:38,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:38,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:39,293 INFO L124 PetriNetUnfolderBase]: 1876/3022 cut-off events. [2024-06-14 13:08:39,293 INFO L125 PetriNetUnfolderBase]: For 128097/128121 co-relation queries the response was YES. [2024-06-14 13:08:39,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18803 conditions, 3022 events. 1876/3022 cut-off events. For 128097/128121 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16365 event pairs, 476 based on Foata normal form. 17/3034 useless extension candidates. Maximal degree in co-relation 18728. Up to 2875 conditions per place. [2024-06-14 13:08:39,312 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 128 selfloop transitions, 28 changer transitions 0/170 dead transitions. [2024-06-14 13:08:39,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 170 transitions, 1714 flow [2024-06-14 13:08:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:08:39,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-14 13:08:39,313 INFO L175 Difference]: Start difference. First operand has 152 places, 155 transitions, 1326 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:08:39,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 170 transitions, 1714 flow [2024-06-14 13:08:39,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 170 transitions, 1672 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:39,408 INFO L231 Difference]: Finished difference. Result has 155 places, 158 transitions, 1401 flow [2024-06-14 13:08:39,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1401, PETRI_PLACES=155, PETRI_TRANSITIONS=158} [2024-06-14 13:08:39,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-14 13:08:39,409 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 158 transitions, 1401 flow [2024-06-14 13:08:39,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 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) [2024-06-14 13:08:39,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:39,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:39,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:08:39,409 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:39,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1317660985, now seen corresponding path program 1 times [2024-06-14 13:08:39,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:39,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862852490] [2024-06-14 13:08:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:39,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:42,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862852490] [2024-06-14 13:08:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862852490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:42,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:42,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:42,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410545686] [2024-06-14 13:08:42,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:42,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:42,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:42,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:42,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:42,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:42,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 158 transitions, 1401 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:08:42,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:42,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:42,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:43,719 INFO L124 PetriNetUnfolderBase]: 1872/3015 cut-off events. [2024-06-14 13:08:43,719 INFO L125 PetriNetUnfolderBase]: For 130847/130847 co-relation queries the response was YES. [2024-06-14 13:08:43,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18816 conditions, 3015 events. 1872/3015 cut-off events. For 130847/130847 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16377 event pairs, 455 based on Foata normal form. 2/3009 useless extension candidates. Maximal degree in co-relation 18740. Up to 2864 conditions per place. [2024-06-14 13:08:43,743 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 145 selfloop transitions, 13 changer transitions 0/174 dead transitions. [2024-06-14 13:08:43,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 174 transitions, 1765 flow [2024-06-14 13:08:43,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:43,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 13:08:43,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-14 13:08:43,745 INFO L175 Difference]: Start difference. First operand has 155 places, 158 transitions, 1401 flow. Second operand 7 states and 109 transitions. [2024-06-14 13:08:43,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 174 transitions, 1765 flow [2024-06-14 13:08:43,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 174 transitions, 1672 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:43,838 INFO L231 Difference]: Finished difference. Result has 157 places, 160 transitions, 1359 flow [2024-06-14 13:08:43,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1359, PETRI_PLACES=157, PETRI_TRANSITIONS=160} [2024-06-14 13:08:43,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 13:08:43,840 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 160 transitions, 1359 flow [2024-06-14 13:08:43,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:08:43,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:43,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:43,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:08:43,841 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:43,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash 985319447, now seen corresponding path program 1 times [2024-06-14 13:08:43,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:43,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738724554] [2024-06-14 13:08:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:43,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:46,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:46,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738724554] [2024-06-14 13:08:46,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738724554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:46,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:46,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:46,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208478526] [2024-06-14 13:08:46,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:46,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:46,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:46,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:46,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:46,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:46,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 160 transitions, 1359 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:08:46,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:46,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:46,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:47,819 INFO L124 PetriNetUnfolderBase]: 1912/3064 cut-off events. [2024-06-14 13:08:47,819 INFO L125 PetriNetUnfolderBase]: For 139564/139566 co-relation queries the response was YES. [2024-06-14 13:08:47,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19491 conditions, 3064 events. 1912/3064 cut-off events. For 139564/139566 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16504 event pairs, 465 based on Foata normal form. 2/3061 useless extension candidates. Maximal degree in co-relation 19414. Up to 2833 conditions per place. [2024-06-14 13:08:47,839 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 41 changer transitions 0/192 dead transitions. [2024-06-14 13:08:47,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 192 transitions, 1933 flow [2024-06-14 13:08:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:08:47,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:08:47,840 INFO L175 Difference]: Start difference. First operand has 157 places, 160 transitions, 1359 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:08:47,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 192 transitions, 1933 flow [2024-06-14 13:08:47,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 192 transitions, 1898 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:47,949 INFO L231 Difference]: Finished difference. Result has 160 places, 166 transitions, 1490 flow [2024-06-14 13:08:47,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1490, PETRI_PLACES=160, PETRI_TRANSITIONS=166} [2024-06-14 13:08:47,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 13:08:47,950 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 166 transitions, 1490 flow [2024-06-14 13:08:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:08:47,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:47,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:08:47,950 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:47,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash 985323322, now seen corresponding path program 1 times [2024-06-14 13:08:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:47,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989603358] [2024-06-14 13:08:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:51,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:51,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989603358] [2024-06-14 13:08:51,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989603358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:51,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:51,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:51,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471201706] [2024-06-14 13:08:51,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:51,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:51,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:51,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:08:51,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 166 transitions, 1490 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:08:51,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:51,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:08:51,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:52,117 INFO L124 PetriNetUnfolderBase]: 2018/3193 cut-off events. [2024-06-14 13:08:52,117 INFO L125 PetriNetUnfolderBase]: For 148494/148494 co-relation queries the response was YES. [2024-06-14 13:08:52,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20666 conditions, 3193 events. 2018/3193 cut-off events. For 148494/148494 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17089 event pairs, 468 based on Foata normal form. 4/3197 useless extension candidates. Maximal degree in co-relation 20588. Up to 3087 conditions per place. [2024-06-14 13:08:52,142 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 179 selfloop transitions, 18 changer transitions 0/201 dead transitions. [2024-06-14 13:08:52,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 201 transitions, 2145 flow [2024-06-14 13:08:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:08:52,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 13:08:52,144 INFO L175 Difference]: Start difference. First operand has 160 places, 166 transitions, 1490 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:08:52,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 201 transitions, 2145 flow [2024-06-14 13:08:52,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 201 transitions, 2066 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:52,271 INFO L231 Difference]: Finished difference. Result has 166 places, 176 transitions, 1566 flow [2024-06-14 13:08:52,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1566, PETRI_PLACES=166, PETRI_TRANSITIONS=176} [2024-06-14 13:08:52,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 13:08:52,272 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 176 transitions, 1566 flow [2024-06-14 13:08:52,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:08:52,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:52,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:52,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:08:52,272 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:52,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:52,273 INFO L85 PathProgramCache]: Analyzing trace with hash 985323167, now seen corresponding path program 2 times [2024-06-14 13:08:52,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:52,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961759399] [2024-06-14 13:08:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:52,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:55,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:55,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961759399] [2024-06-14 13:08:55,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961759399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:55,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:55,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:55,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122094817] [2024-06-14 13:08:55,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:55,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:55,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:55,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:55,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 176 transitions, 1566 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:08:55,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:55,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:55,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:56,715 INFO L124 PetriNetUnfolderBase]: 1932/3090 cut-off events. [2024-06-14 13:08:56,716 INFO L125 PetriNetUnfolderBase]: For 151178/151180 co-relation queries the response was YES. [2024-06-14 13:08:56,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20591 conditions, 3090 events. 1932/3090 cut-off events. For 151178/151180 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16645 event pairs, 462 based on Foata normal form. 2/3087 useless extension candidates. Maximal degree in co-relation 20509. Up to 2904 conditions per place. [2024-06-14 13:08:56,740 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 156 selfloop transitions, 26 changer transitions 0/200 dead transitions. [2024-06-14 13:08:56,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 200 transitions, 2026 flow [2024-06-14 13:08:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:56,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:08:56,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:08:56,741 INFO L175 Difference]: Start difference. First operand has 166 places, 176 transitions, 1566 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:08:56,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 200 transitions, 2026 flow [2024-06-14 13:08:56,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 200 transitions, 1956 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:56,879 INFO L231 Difference]: Finished difference. Result has 170 places, 179 transitions, 1608 flow [2024-06-14 13:08:56,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1608, PETRI_PLACES=170, PETRI_TRANSITIONS=179} [2024-06-14 13:08:56,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 13:08:56,880 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 179 transitions, 1608 flow [2024-06-14 13:08:56,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:08:56,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:56,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:56,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:08:56,880 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:56,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:56,881 INFO L85 PathProgramCache]: Analyzing trace with hash 801160418, now seen corresponding path program 2 times [2024-06-14 13:08:56,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:56,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331544831] [2024-06-14 13:08:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:56,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:59,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:59,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331544831] [2024-06-14 13:08:59,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331544831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:59,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:59,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:59,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514854444] [2024-06-14 13:08:59,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:59,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:59,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:59,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:59,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:08:59,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 179 transitions, 1608 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:08:59,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:59,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:08:59,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:00,393 INFO L124 PetriNetUnfolderBase]: 2034/3215 cut-off events. [2024-06-14 13:09:00,393 INFO L125 PetriNetUnfolderBase]: For 160744/160744 co-relation queries the response was YES. [2024-06-14 13:09:00,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21852 conditions, 3215 events. 2034/3215 cut-off events. For 160744/160744 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17182 event pairs, 460 based on Foata normal form. 2/3217 useless extension candidates. Maximal degree in co-relation 21769. Up to 3090 conditions per place. [2024-06-14 13:09:00,418 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 173 selfloop transitions, 33 changer transitions 0/210 dead transitions. [2024-06-14 13:09:00,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 210 transitions, 2262 flow [2024-06-14 13:09:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:00,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:00,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:09:00,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:09:00,419 INFO L175 Difference]: Start difference. First operand has 170 places, 179 transitions, 1608 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:09:00,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 210 transitions, 2262 flow [2024-06-14 13:09:00,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 210 transitions, 2178 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:00,569 INFO L231 Difference]: Finished difference. Result has 173 places, 187 transitions, 1711 flow [2024-06-14 13:09:00,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1711, PETRI_PLACES=173, PETRI_TRANSITIONS=187} [2024-06-14 13:09:00,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-14 13:09:00,570 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 187 transitions, 1711 flow [2024-06-14 13:09:00,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:00,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:00,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:00,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:09:00,570 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:00,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:00,570 INFO L85 PathProgramCache]: Analyzing trace with hash 989042237, now seen corresponding path program 3 times [2024-06-14 13:09:00,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:00,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512788552] [2024-06-14 13:09:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:00,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:03,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:03,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512788552] [2024-06-14 13:09:03,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512788552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:03,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:03,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368655604] [2024-06-14 13:09:03,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:03,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:03,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:03,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:03,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:03,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 187 transitions, 1711 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:09:03,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:03,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:03,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:04,688 INFO L124 PetriNetUnfolderBase]: 2123/3367 cut-off events. [2024-06-14 13:09:04,688 INFO L125 PetriNetUnfolderBase]: For 196820/196822 co-relation queries the response was YES. [2024-06-14 13:09:04,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24757 conditions, 3367 events. 2123/3367 cut-off events. For 196820/196822 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18225 event pairs, 445 based on Foata normal form. 2/3364 useless extension candidates. Maximal degree in co-relation 24672. Up to 2869 conditions per place. [2024-06-14 13:09:04,722 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 133 selfloop transitions, 71 changer transitions 0/224 dead transitions. [2024-06-14 13:09:04,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 224 transitions, 2482 flow [2024-06-14 13:09:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:09:04,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 13:09:04,723 INFO L175 Difference]: Start difference. First operand has 173 places, 187 transitions, 1711 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:09:04,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 224 transitions, 2482 flow [2024-06-14 13:09:04,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 224 transitions, 2378 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:04,991 INFO L231 Difference]: Finished difference. Result has 179 places, 199 transitions, 2036 flow [2024-06-14 13:09:04,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2036, PETRI_PLACES=179, PETRI_TRANSITIONS=199} [2024-06-14 13:09:04,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-14 13:09:04,992 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 199 transitions, 2036 flow [2024-06-14 13:09:04,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:09:04,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:04,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:04,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:09:04,993 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:04,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:04,993 INFO L85 PathProgramCache]: Analyzing trace with hash 989047972, now seen corresponding path program 3 times [2024-06-14 13:09:04,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:04,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411466520] [2024-06-14 13:09:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:04,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:07,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:07,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411466520] [2024-06-14 13:09:07,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411466520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:07,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:07,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:07,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169688109] [2024-06-14 13:09:07,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:07,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:07,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:07,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:07,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:07,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:07,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 199 transitions, 2036 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:07,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:07,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:07,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:08,616 INFO L124 PetriNetUnfolderBase]: 2200/3455 cut-off events. [2024-06-14 13:09:08,616 INFO L125 PetriNetUnfolderBase]: For 205616/205616 co-relation queries the response was YES. [2024-06-14 13:09:08,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26545 conditions, 3455 events. 2200/3455 cut-off events. For 205616/205616 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18538 event pairs, 517 based on Foata normal form. 2/3457 useless extension candidates. Maximal degree in co-relation 26457. Up to 3358 conditions per place. [2024-06-14 13:09:08,650 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 197 selfloop transitions, 29 changer transitions 0/230 dead transitions. [2024-06-14 13:09:08,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 230 transitions, 2657 flow [2024-06-14 13:09:08,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:08,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 13:09:08,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-14 13:09:08,651 INFO L175 Difference]: Start difference. First operand has 179 places, 199 transitions, 2036 flow. Second operand 8 states and 122 transitions. [2024-06-14 13:09:08,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 230 transitions, 2657 flow [2024-06-14 13:09:08,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 230 transitions, 2586 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:08,912 INFO L231 Difference]: Finished difference. Result has 185 places, 212 transitions, 2201 flow [2024-06-14 13:09:08,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2201, PETRI_PLACES=185, PETRI_TRANSITIONS=212} [2024-06-14 13:09:08,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 13:09:08,912 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 212 transitions, 2201 flow [2024-06-14 13:09:08,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:08,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:08,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:08,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:09:08,913 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:08,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:08,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1383933864, now seen corresponding path program 4 times [2024-06-14 13:09:08,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:08,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998701450] [2024-06-14 13:09:08,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:08,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:11,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:11,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998701450] [2024-06-14 13:09:11,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998701450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:11,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:11,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:11,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385893234] [2024-06-14 13:09:11,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:11,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:11,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:11,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:11,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:11,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:11,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 212 transitions, 2201 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:11,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:11,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:11,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:12,668 INFO L124 PetriNetUnfolderBase]: 2215/3487 cut-off events. [2024-06-14 13:09:12,669 INFO L125 PetriNetUnfolderBase]: For 216215/216225 co-relation queries the response was YES. [2024-06-14 13:09:12,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27072 conditions, 3487 events. 2215/3487 cut-off events. For 216215/216225 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19078 event pairs, 1161 based on Foata normal form. 13/3499 useless extension candidates. Maximal degree in co-relation 26979. Up to 3362 conditions per place. [2024-06-14 13:09:12,701 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 42 changer transitions 0/233 dead transitions. [2024-06-14 13:09:12,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 2811 flow [2024-06-14 13:09:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 127 transitions. [2024-06-14 13:09:12,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3281653746770026 [2024-06-14 13:09:12,704 INFO L175 Difference]: Start difference. First operand has 185 places, 212 transitions, 2201 flow. Second operand 9 states and 127 transitions. [2024-06-14 13:09:12,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 2811 flow [2024-06-14 13:09:12,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 233 transitions, 2745 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 13:09:12,921 INFO L231 Difference]: Finished difference. Result has 193 places, 219 transitions, 2357 flow [2024-06-14 13:09:12,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2357, PETRI_PLACES=193, PETRI_TRANSITIONS=219} [2024-06-14 13:09:12,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 13:09:12,921 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 219 transitions, 2357 flow [2024-06-14 13:09:12,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:12,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:12,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:12,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:09:12,922 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:12,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:12,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2109815235, now seen corresponding path program 4 times [2024-06-14 13:09:12,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:12,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33593254] [2024-06-14 13:09:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:12,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:15,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:15,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33593254] [2024-06-14 13:09:15,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33593254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:15,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:15,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:15,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932613670] [2024-06-14 13:09:15,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:15,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:15,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:15,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:15,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 219 transitions, 2357 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:09:15,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:15,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:15,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:16,665 INFO L124 PetriNetUnfolderBase]: 2132/3394 cut-off events. [2024-06-14 13:09:16,666 INFO L125 PetriNetUnfolderBase]: For 219056/219085 co-relation queries the response was YES. [2024-06-14 13:09:16,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26835 conditions, 3394 events. 2132/3394 cut-off events. For 219056/219085 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18425 event pairs, 527 based on Foata normal form. 23/3416 useless extension candidates. Maximal degree in co-relation 26738. Up to 3170 conditions per place. [2024-06-14 13:09:16,696 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 174 selfloop transitions, 31 changer transitions 0/232 dead transitions. [2024-06-14 13:09:16,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 232 transitions, 2799 flow [2024-06-14 13:09:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 13:09:16,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-14 13:09:16,697 INFO L175 Difference]: Start difference. First operand has 193 places, 219 transitions, 2357 flow. Second operand 8 states and 122 transitions. [2024-06-14 13:09:16,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 232 transitions, 2799 flow [2024-06-14 13:09:16,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 232 transitions, 2633 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:16,926 INFO L231 Difference]: Finished difference. Result has 196 places, 219 transitions, 2259 flow [2024-06-14 13:09:16,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2259, PETRI_PLACES=196, PETRI_TRANSITIONS=219} [2024-06-14 13:09:16,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 13:09:16,926 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 219 transitions, 2259 flow [2024-06-14 13:09:16,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 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) [2024-06-14 13:09:16,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:16,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:16,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:09:16,927 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:16,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:16,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2109809500, now seen corresponding path program 5 times [2024-06-14 13:09:16,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:16,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063263960] [2024-06-14 13:09:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:16,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:19,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:19,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063263960] [2024-06-14 13:09:19,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063263960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:19,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:19,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:19,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872531999] [2024-06-14 13:09:19,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:19,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:19,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:19,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:19,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:19,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 219 transitions, 2259 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:19,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:19,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:19,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:21,160 INFO L124 PetriNetUnfolderBase]: 2329/3653 cut-off events. [2024-06-14 13:09:21,160 INFO L125 PetriNetUnfolderBase]: For 245907/245924 co-relation queries the response was YES. [2024-06-14 13:09:21,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29651 conditions, 3653 events. 2329/3653 cut-off events. For 245907/245924 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19940 event pairs, 1030 based on Foata normal form. 18/3670 useless extension candidates. Maximal degree in co-relation 29552. Up to 3201 conditions per place. [2024-06-14 13:09:21,191 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 178 selfloop transitions, 95 changer transitions 0/277 dead transitions. [2024-06-14 13:09:21,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 277 transitions, 3585 flow [2024-06-14 13:09:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:09:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:09:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 13:09:21,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-14 13:09:21,193 INFO L175 Difference]: Start difference. First operand has 196 places, 219 transitions, 2259 flow. Second operand 10 states and 158 transitions. [2024-06-14 13:09:21,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 277 transitions, 3585 flow [2024-06-14 13:09:21,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 277 transitions, 3491 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:21,467 INFO L231 Difference]: Finished difference. Result has 201 places, 252 transitions, 3004 flow [2024-06-14 13:09:21,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3004, PETRI_PLACES=201, PETRI_TRANSITIONS=252} [2024-06-14 13:09:21,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 13:09:21,467 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 252 transitions, 3004 flow [2024-06-14 13:09:21,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:21,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:21,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:21,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:09:21,468 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:21,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2109815080, now seen corresponding path program 6 times [2024-06-14 13:09:21,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:21,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738683719] [2024-06-14 13:09:21,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:21,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:23,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738683719] [2024-06-14 13:09:23,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738683719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:23,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:23,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448685502] [2024-06-14 13:09:23,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:23,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:23,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:23,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 252 transitions, 3004 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:23,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:23,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:23,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:25,104 INFO L124 PetriNetUnfolderBase]: 2323/3643 cut-off events. [2024-06-14 13:09:25,105 INFO L125 PetriNetUnfolderBase]: For 257569/257581 co-relation queries the response was YES. [2024-06-14 13:09:25,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31063 conditions, 3643 events. 2323/3643 cut-off events. For 257569/257581 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19820 event pairs, 1177 based on Foata normal form. 14/3656 useless extension candidates. Maximal degree in co-relation 30961. Up to 3518 conditions per place. [2024-06-14 13:09:25,142 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 230 selfloop transitions, 43 changer transitions 0/277 dead transitions. [2024-06-14 13:09:25,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 277 transitions, 3776 flow [2024-06-14 13:09:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:09:25,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-14 13:09:25,143 INFO L175 Difference]: Start difference. First operand has 201 places, 252 transitions, 3004 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:09:25,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 277 transitions, 3776 flow [2024-06-14 13:09:25,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 277 transitions, 3624 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:25,490 INFO L231 Difference]: Finished difference. Result has 206 places, 262 transitions, 3155 flow [2024-06-14 13:09:25,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3155, PETRI_PLACES=206, PETRI_TRANSITIONS=262} [2024-06-14 13:09:25,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-14 13:09:25,490 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 262 transitions, 3155 flow [2024-06-14 13:09:25,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:25,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:25,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:25,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:09:25,491 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:25,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:25,491 INFO L85 PathProgramCache]: Analyzing trace with hash -101541884, now seen corresponding path program 1 times [2024-06-14 13:09:25,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:25,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046514534] [2024-06-14 13:09:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:25,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:27,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:27,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046514534] [2024-06-14 13:09:27,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046514534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:27,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:27,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:27,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429026832] [2024-06-14 13:09:27,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:27,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:27,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:27,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:27,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:27,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 262 transitions, 3155 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:27,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:27,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:27,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:28,703 INFO L124 PetriNetUnfolderBase]: 2353/3686 cut-off events. [2024-06-14 13:09:28,704 INFO L125 PetriNetUnfolderBase]: For 264745/264749 co-relation queries the response was YES. [2024-06-14 13:09:28,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31604 conditions, 3686 events. 2353/3686 cut-off events. For 264745/264749 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19751 event pairs, 388 based on Foata normal form. 6/3692 useless extension candidates. Maximal degree in co-relation 31499. Up to 3489 conditions per place. [2024-06-14 13:09:28,736 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 280 selfloop transitions, 27 changer transitions 0/311 dead transitions. [2024-06-14 13:09:28,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 311 transitions, 4062 flow [2024-06-14 13:09:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:09:28,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:09:28,738 INFO L175 Difference]: Start difference. First operand has 206 places, 262 transitions, 3155 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:09:28,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 311 transitions, 4062 flow [2024-06-14 13:09:29,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 311 transitions, 3907 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:29,039 INFO L231 Difference]: Finished difference. Result has 212 places, 270 transitions, 3165 flow [2024-06-14 13:09:29,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3165, PETRI_PLACES=212, PETRI_TRANSITIONS=270} [2024-06-14 13:09:29,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 13:09:29,040 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 270 transitions, 3165 flow [2024-06-14 13:09:29,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:29,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:29,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:29,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:09:29,040 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:29,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:29,041 INFO L85 PathProgramCache]: Analyzing trace with hash 2115226234, now seen corresponding path program 2 times [2024-06-14 13:09:29,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:29,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979923547] [2024-06-14 13:09:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:29,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:31,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:31,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979923547] [2024-06-14 13:09:31,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979923547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:31,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:31,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356538701] [2024-06-14 13:09:31,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:31,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:31,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:31,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:31,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:31,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:31,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 270 transitions, 3165 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:31,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:31,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:31,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:32,577 INFO L124 PetriNetUnfolderBase]: 2361/3694 cut-off events. [2024-06-14 13:09:32,578 INFO L125 PetriNetUnfolderBase]: For 274137/274139 co-relation queries the response was YES. [2024-06-14 13:09:32,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32061 conditions, 3694 events. 2361/3694 cut-off events. For 274137/274139 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19684 event pairs, 409 based on Foata normal form. 2/3695 useless extension candidates. Maximal degree in co-relation 31953. Up to 3497 conditions per place. [2024-06-14 13:09:32,616 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 262 selfloop transitions, 23 changer transitions 0/289 dead transitions. [2024-06-14 13:09:32,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 289 transitions, 3927 flow [2024-06-14 13:09:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 13:09:32,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:09:32,617 INFO L175 Difference]: Start difference. First operand has 212 places, 270 transitions, 3165 flow. Second operand 6 states and 100 transitions. [2024-06-14 13:09:32,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 289 transitions, 3927 flow [2024-06-14 13:09:32,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 289 transitions, 3840 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:32,952 INFO L231 Difference]: Finished difference. Result has 213 places, 272 transitions, 3172 flow [2024-06-14 13:09:32,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3086, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3172, PETRI_PLACES=213, PETRI_TRANSITIONS=272} [2024-06-14 13:09:32,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-14 13:09:32,953 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 272 transitions, 3172 flow [2024-06-14 13:09:32,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:32,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:32,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:32,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:09:32,954 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:32,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:32,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1978678036, now seen corresponding path program 3 times [2024-06-14 13:09:32,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:32,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334805331] [2024-06-14 13:09:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:32,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:35,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:35,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334805331] [2024-06-14 13:09:35,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334805331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:35,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:35,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:35,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525421250] [2024-06-14 13:09:35,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:35,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:35,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:35,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:35,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 272 transitions, 3172 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:35,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:35,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:35,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:36,384 INFO L124 PetriNetUnfolderBase]: 2356/3687 cut-off events. [2024-06-14 13:09:36,384 INFO L125 PetriNetUnfolderBase]: For 279339/279341 co-relation queries the response was YES. [2024-06-14 13:09:36,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32037 conditions, 3687 events. 2356/3687 cut-off events. For 279339/279341 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19771 event pairs, 546 based on Foata normal form. 2/3688 useless extension candidates. Maximal degree in co-relation 31930. Up to 3569 conditions per place. [2024-06-14 13:09:36,419 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 261 selfloop transitions, 18 changer transitions 0/283 dead transitions. [2024-06-14 13:09:36,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 283 transitions, 3758 flow [2024-06-14 13:09:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-14 13:09:36,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682170542635659 [2024-06-14 13:09:36,420 INFO L175 Difference]: Start difference. First operand has 213 places, 272 transitions, 3172 flow. Second operand 6 states and 95 transitions. [2024-06-14 13:09:36,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 283 transitions, 3758 flow [2024-06-14 13:09:36,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 283 transitions, 3679 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:36,752 INFO L231 Difference]: Finished difference. Result has 215 places, 272 transitions, 3134 flow [2024-06-14 13:09:36,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3093, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3134, PETRI_PLACES=215, PETRI_TRANSITIONS=272} [2024-06-14 13:09:36,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 13:09:36,752 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 272 transitions, 3134 flow [2024-06-14 13:09:36,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:36,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:36,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:36,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:09:36,753 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:36,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1308706986, now seen corresponding path program 1 times [2024-06-14 13:09:36,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:36,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119173201] [2024-06-14 13:09:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:36,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:38,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:38,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119173201] [2024-06-14 13:09:38,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119173201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:38,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:38,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:38,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552251141] [2024-06-14 13:09:38,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:38,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:38,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:38,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:38,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 272 transitions, 3134 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:38,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:38,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:38,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:40,268 INFO L124 PetriNetUnfolderBase]: 2369/3705 cut-off events. [2024-06-14 13:09:40,268 INFO L125 PetriNetUnfolderBase]: For 280068/280070 co-relation queries the response was YES. [2024-06-14 13:09:40,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32172 conditions, 3705 events. 2369/3705 cut-off events. For 280068/280070 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19870 event pairs, 547 based on Foata normal form. 1/3705 useless extension candidates. Maximal degree in co-relation 32065. Up to 3531 conditions per place. [2024-06-14 13:09:40,305 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 252 selfloop transitions, 37 changer transitions 0/293 dead transitions. [2024-06-14 13:09:40,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 293 transitions, 3998 flow [2024-06-14 13:09:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:09:40,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:09:40,306 INFO L175 Difference]: Start difference. First operand has 215 places, 272 transitions, 3134 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:09:40,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 293 transitions, 3998 flow [2024-06-14 13:09:40,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 293 transitions, 3955 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:40,663 INFO L231 Difference]: Finished difference. Result has 216 places, 278 transitions, 3320 flow [2024-06-14 13:09:40,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3320, PETRI_PLACES=216, PETRI_TRANSITIONS=278} [2024-06-14 13:09:40,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-14 13:09:40,664 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 278 transitions, 3320 flow [2024-06-14 13:09:40,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:40,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:40,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:40,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:09:40,664 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:40,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1978675060, now seen corresponding path program 2 times [2024-06-14 13:09:40,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:40,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578136143] [2024-06-14 13:09:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:40,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:42,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:42,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578136143] [2024-06-14 13:09:42,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578136143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:42,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:42,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:42,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585532632] [2024-06-14 13:09:42,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:42,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:42,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:42,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:42,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:42,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:42,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 278 transitions, 3320 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:42,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:42,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:42,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:44,819 INFO L124 PetriNetUnfolderBase]: 2366/3701 cut-off events. [2024-06-14 13:09:44,819 INFO L125 PetriNetUnfolderBase]: For 289394/289396 co-relation queries the response was YES. [2024-06-14 13:09:44,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32560 conditions, 3701 events. 2366/3701 cut-off events. For 289394/289396 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19862 event pairs, 544 based on Foata normal form. 1/3701 useless extension candidates. Maximal degree in co-relation 32452. Up to 3528 conditions per place. [2024-06-14 13:09:44,855 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 250 selfloop transitions, 40 changer transitions 0/294 dead transitions. [2024-06-14 13:09:44,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 294 transitions, 3942 flow [2024-06-14 13:09:44,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:09:44,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 13:09:44,856 INFO L175 Difference]: Start difference. First operand has 216 places, 278 transitions, 3320 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:09:44,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 294 transitions, 3942 flow [2024-06-14 13:09:45,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 294 transitions, 3833 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 13:09:45,203 INFO L231 Difference]: Finished difference. Result has 221 places, 278 transitions, 3304 flow [2024-06-14 13:09:45,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3211, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3304, PETRI_PLACES=221, PETRI_TRANSITIONS=278} [2024-06-14 13:09:45,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-14 13:09:45,205 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 278 transitions, 3304 flow [2024-06-14 13:09:45,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:45,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:45,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:45,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:09:45,206 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:45,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash -508818012, now seen corresponding path program 3 times [2024-06-14 13:09:45,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:45,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592178167] [2024-06-14 13:09:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:45,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:47,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:47,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592178167] [2024-06-14 13:09:47,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592178167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:47,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:47,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291133231] [2024-06-14 13:09:47,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:47,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:47,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:47,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:47,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:47,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 278 transitions, 3304 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:47,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:47,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:47,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:49,086 INFO L124 PetriNetUnfolderBase]: 2371/3710 cut-off events. [2024-06-14 13:09:49,086 INFO L125 PetriNetUnfolderBase]: For 290013/290015 co-relation queries the response was YES. [2024-06-14 13:09:49,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32679 conditions, 3710 events. 2371/3710 cut-off events. For 290013/290015 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19925 event pairs, 547 based on Foata normal form. 1/3710 useless extension candidates. Maximal degree in co-relation 32570. Up to 3515 conditions per place. [2024-06-14 13:09:49,121 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 257 selfloop transitions, 43 changer transitions 0/304 dead transitions. [2024-06-14 13:09:49,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 304 transitions, 4218 flow [2024-06-14 13:09:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:09:49,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 13:09:49,122 INFO L175 Difference]: Start difference. First operand has 221 places, 278 transitions, 3304 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:09:49,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 304 transitions, 4218 flow [2024-06-14 13:09:49,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 304 transitions, 4106 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 13:09:49,481 INFO L231 Difference]: Finished difference. Result has 220 places, 284 transitions, 3440 flow [2024-06-14 13:09:49,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3194, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3440, PETRI_PLACES=220, PETRI_TRANSITIONS=284} [2024-06-14 13:09:49,482 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 13:09:49,482 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 284 transitions, 3440 flow [2024-06-14 13:09:49,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:49,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:49,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:49,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:09:49,482 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:49,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:49,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1761505808, now seen corresponding path program 1 times [2024-06-14 13:09:49,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:49,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483202181] [2024-06-14 13:09:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:49,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:51,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:51,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483202181] [2024-06-14 13:09:51,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483202181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:51,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:51,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:51,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765254515] [2024-06-14 13:09:51,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:51,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:51,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:51,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:51,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:51,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 284 transitions, 3440 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:51,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:51,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:51,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:53,816 INFO L124 PetriNetUnfolderBase]: 2397/3752 cut-off events. [2024-06-14 13:09:53,816 INFO L125 PetriNetUnfolderBase]: For 298038/298042 co-relation queries the response was YES. [2024-06-14 13:09:53,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33376 conditions, 3752 events. 2397/3752 cut-off events. For 298038/298042 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 20235 event pairs, 535 based on Foata normal form. 6/3758 useless extension candidates. Maximal degree in co-relation 33267. Up to 3561 conditions per place. [2024-06-14 13:09:53,856 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 257 selfloop transitions, 54 changer transitions 0/315 dead transitions. [2024-06-14 13:09:53,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 315 transitions, 4422 flow [2024-06-14 13:09:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:09:53,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-14 13:09:53,857 INFO L175 Difference]: Start difference. First operand has 220 places, 284 transitions, 3440 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:09:53,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 315 transitions, 4422 flow [2024-06-14 13:09:54,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 315 transitions, 4256 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:54,234 INFO L231 Difference]: Finished difference. Result has 226 places, 293 transitions, 3586 flow [2024-06-14 13:09:54,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3586, PETRI_PLACES=226, PETRI_TRANSITIONS=293} [2024-06-14 13:09:54,235 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-14 13:09:54,235 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 293 transitions, 3586 flow [2024-06-14 13:09:54,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:54,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:54,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:09:54,235 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:54,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash -508519482, now seen corresponding path program 4 times [2024-06-14 13:09:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:54,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139901564] [2024-06-14 13:09:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:56,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139901564] [2024-06-14 13:09:56,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139901564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:56,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:56,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143934497] [2024-06-14 13:09:56,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:56,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:56,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:56,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:56,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:56,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:09:56,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 293 transitions, 3586 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:56,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:56,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:09:56,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:58,209 INFO L124 PetriNetUnfolderBase]: 2402/3755 cut-off events. [2024-06-14 13:09:58,209 INFO L125 PetriNetUnfolderBase]: For 303999/304001 co-relation queries the response was YES. [2024-06-14 13:09:58,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33538 conditions, 3755 events. 2402/3755 cut-off events. For 303999/304001 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20183 event pairs, 549 based on Foata normal form. 1/3755 useless extension candidates. Maximal degree in co-relation 33427. Up to 3557 conditions per place. [2024-06-14 13:09:58,249 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 261 selfloop transitions, 47 changer transitions 0/312 dead transitions. [2024-06-14 13:09:58,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 312 transitions, 4412 flow [2024-06-14 13:09:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:09:58,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 13:09:58,251 INFO L175 Difference]: Start difference. First operand has 226 places, 293 transitions, 3586 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:09:58,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 312 transitions, 4412 flow [2024-06-14 13:09:58,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 312 transitions, 4298 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:58,649 INFO L231 Difference]: Finished difference. Result has 228 places, 296 transitions, 3628 flow [2024-06-14 13:09:58,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3628, PETRI_PLACES=228, PETRI_TRANSITIONS=296} [2024-06-14 13:09:58,650 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 13:09:58,650 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 296 transitions, 3628 flow [2024-06-14 13:09:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:09:58,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:58,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:58,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:09:58,650 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:58,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:58,651 INFO L85 PathProgramCache]: Analyzing trace with hash 662089718, now seen corresponding path program 2 times [2024-06-14 13:09:58,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:58,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029569776] [2024-06-14 13:09:58,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:58,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:00,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:00,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029569776] [2024-06-14 13:10:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029569776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:00,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287460771] [2024-06-14 13:10:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:00,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:00,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:10:00,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 296 transitions, 3628 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:00,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:00,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:10:00,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:02,621 INFO L124 PetriNetUnfolderBase]: 2412/3775 cut-off events. [2024-06-14 13:10:02,621 INFO L125 PetriNetUnfolderBase]: For 306445/306478 co-relation queries the response was YES. [2024-06-14 13:10:02,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33638 conditions, 3775 events. 2412/3775 cut-off events. For 306445/306478 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 20383 event pairs, 545 based on Foata normal form. 27/3802 useless extension candidates. Maximal degree in co-relation 33526. Up to 3578 conditions per place. [2024-06-14 13:10:02,658 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 255 selfloop transitions, 55 changer transitions 0/314 dead transitions. [2024-06-14 13:10:02,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 314 transitions, 4476 flow [2024-06-14 13:10:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:10:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:10:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:10:02,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:10:02,660 INFO L175 Difference]: Start difference. First operand has 228 places, 296 transitions, 3628 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:10:02,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 314 transitions, 4476 flow [2024-06-14 13:10:02,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 314 transitions, 4376 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 13:10:02,989 INFO L231 Difference]: Finished difference. Result has 231 places, 299 transitions, 3713 flow [2024-06-14 13:10:02,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3528, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3713, PETRI_PLACES=231, PETRI_TRANSITIONS=299} [2024-06-14 13:10:02,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-14 13:10:02,990 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 299 transitions, 3713 flow [2024-06-14 13:10:02,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:02,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:02,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:10:02,991 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:02,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash -335550484, now seen corresponding path program 5 times [2024-06-14 13:10:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:02,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995592225] [2024-06-14 13:10:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:02,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:05,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:05,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995592225] [2024-06-14 13:10:05,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995592225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:05,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:05,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:05,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365339452] [2024-06-14 13:10:05,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:05,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:05,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:05,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:10:05,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 299 transitions, 3713 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:05,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:05,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:10:05,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:07,096 INFO L124 PetriNetUnfolderBase]: 2409/3767 cut-off events. [2024-06-14 13:10:07,096 INFO L125 PetriNetUnfolderBase]: For 312750/312781 co-relation queries the response was YES. [2024-06-14 13:10:07,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33731 conditions, 3767 events. 2409/3767 cut-off events. For 312750/312781 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20303 event pairs, 564 based on Foata normal form. 22/3788 useless extension candidates. Maximal degree in co-relation 33618. Up to 3568 conditions per place. [2024-06-14 13:10:07,133 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 259 selfloop transitions, 47 changer transitions 0/310 dead transitions. [2024-06-14 13:10:07,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 310 transitions, 4353 flow [2024-06-14 13:10:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:10:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:10:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:10:07,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-14 13:10:07,134 INFO L175 Difference]: Start difference. First operand has 231 places, 299 transitions, 3713 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:10:07,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 310 transitions, 4353 flow [2024-06-14 13:10:07,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 310 transitions, 4217 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:07,523 INFO L231 Difference]: Finished difference. Result has 233 places, 299 transitions, 3677 flow [2024-06-14 13:10:07,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3677, PETRI_PLACES=233, PETRI_TRANSITIONS=299} [2024-06-14 13:10:07,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 13:10:07,523 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 299 transitions, 3677 flow [2024-06-14 13:10:07,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:07,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:07,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:07,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:10:07,524 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:07,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:07,524 INFO L85 PathProgramCache]: Analyzing trace with hash -335550112, now seen corresponding path program 3 times [2024-06-14 13:10:07,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:07,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386046609] [2024-06-14 13:10:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:07,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:09,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:09,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386046609] [2024-06-14 13:10:09,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386046609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:09,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:09,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:09,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522166155] [2024-06-14 13:10:09,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:09,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:09,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:09,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:09,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:10:09,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 299 transitions, 3677 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:09,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:09,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:10:09,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:11,825 INFO L124 PetriNetUnfolderBase]: 2403/3765 cut-off events. [2024-06-14 13:10:11,826 INFO L125 PetriNetUnfolderBase]: For 310363/310396 co-relation queries the response was YES. [2024-06-14 13:10:11,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33471 conditions, 3765 events. 2403/3765 cut-off events. For 310363/310396 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20376 event pairs, 542 based on Foata normal form. 27/3792 useless extension candidates. Maximal degree in co-relation 33358. Up to 3569 conditions per place. [2024-06-14 13:10:11,862 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 255 selfloop transitions, 57 changer transitions 0/316 dead transitions. [2024-06-14 13:10:11,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 316 transitions, 4363 flow [2024-06-14 13:10:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 13:10:11,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35142118863049093 [2024-06-14 13:10:11,864 INFO L175 Difference]: Start difference. First operand has 233 places, 299 transitions, 3677 flow. Second operand 9 states and 136 transitions. [2024-06-14 13:10:11,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 316 transitions, 4363 flow [2024-06-14 13:10:12,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 316 transitions, 4197 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:12,266 INFO L231 Difference]: Finished difference. Result has 235 places, 299 transitions, 3637 flow [2024-06-14 13:10:12,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3637, PETRI_PLACES=235, PETRI_TRANSITIONS=299} [2024-06-14 13:10:12,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-14 13:10:12,267 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 299 transitions, 3637 flow [2024-06-14 13:10:12,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:12,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:12,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:12,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:10:12,267 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:12,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:12,267 INFO L85 PathProgramCache]: Analyzing trace with hash -335304034, now seen corresponding path program 1 times [2024-06-14 13:10:12,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:12,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492363108] [2024-06-14 13:10:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:12,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:15,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:15,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492363108] [2024-06-14 13:10:15,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492363108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:15,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:15,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:15,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252829211] [2024-06-14 13:10:15,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:15,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:15,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:15,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:15,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:15,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:15,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 299 transitions, 3637 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:10:15,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:15,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:15,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:17,089 INFO L124 PetriNetUnfolderBase]: 2379/3731 cut-off events. [2024-06-14 13:10:17,089 INFO L125 PetriNetUnfolderBase]: For 337241/337244 co-relation queries the response was YES. [2024-06-14 13:10:17,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33328 conditions, 3731 events. 2379/3731 cut-off events. For 337241/337244 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20309 event pairs, 534 based on Foata normal form. 12/3733 useless extension candidates. Maximal degree in co-relation 33214. Up to 3413 conditions per place. [2024-06-14 13:10:17,129 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 257 selfloop transitions, 29 changer transitions 0/317 dead transitions. [2024-06-14 13:10:17,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 317 transitions, 4323 flow [2024-06-14 13:10:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:10:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:10:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:10:17,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 13:10:17,130 INFO L175 Difference]: Start difference. First operand has 235 places, 299 transitions, 3637 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:10:17,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 317 transitions, 4323 flow [2024-06-14 13:10:17,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 317 transitions, 4160 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:17,646 INFO L231 Difference]: Finished difference. Result has 232 places, 300 transitions, 3559 flow [2024-06-14 13:10:17,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3559, PETRI_PLACES=232, PETRI_TRANSITIONS=300} [2024-06-14 13:10:17,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-14 13:10:17,647 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 300 transitions, 3559 flow [2024-06-14 13:10:17,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:10:17,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:17,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:17,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:10:17,647 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:17,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash 595709498, now seen corresponding path program 4 times [2024-06-14 13:10:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:17,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974982516] [2024-06-14 13:10:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:17,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:20,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:20,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974982516] [2024-06-14 13:10:20,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974982516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:20,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:20,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:20,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119690044] [2024-06-14 13:10:20,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:20,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:20,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:20,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:20,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:20,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:10:20,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 300 transitions, 3559 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:20,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:20,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:10:20,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:21,918 INFO L124 PetriNetUnfolderBase]: 2457/3845 cut-off events. [2024-06-14 13:10:21,918 INFO L125 PetriNetUnfolderBase]: For 320858/320862 co-relation queries the response was YES. [2024-06-14 13:10:21,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34182 conditions, 3845 events. 2457/3845 cut-off events. For 320858/320862 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20822 event pairs, 548 based on Foata normal form. 6/3851 useless extension candidates. Maximal degree in co-relation 34068. Up to 3616 conditions per place. [2024-06-14 13:10:21,956 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 271 selfloop transitions, 56 changer transitions 0/331 dead transitions. [2024-06-14 13:10:21,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 331 transitions, 4591 flow [2024-06-14 13:10:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:10:21,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 13:10:21,957 INFO L175 Difference]: Start difference. First operand has 232 places, 300 transitions, 3559 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:10:21,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 331 transitions, 4591 flow [2024-06-14 13:10:22,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 331 transitions, 4536 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:22,382 INFO L231 Difference]: Finished difference. Result has 236 places, 309 transitions, 3827 flow [2024-06-14 13:10:22,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3504, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3827, PETRI_PLACES=236, PETRI_TRANSITIONS=309} [2024-06-14 13:10:22,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 13:10:22,383 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 309 transitions, 3827 flow [2024-06-14 13:10:22,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:22,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:22,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:22,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:10:22,383 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:22,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash 41460504, now seen corresponding path program 5 times [2024-06-14 13:10:22,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:22,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287827260] [2024-06-14 13:10:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:22,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:25,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287827260] [2024-06-14 13:10:25,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287827260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:25,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:25,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220038634] [2024-06-14 13:10:25,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:25,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:25,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:25,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:25,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:10:25,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 309 transitions, 3827 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:25,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:25,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:10:25,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:26,863 INFO L124 PetriNetUnfolderBase]: 2467/3861 cut-off events. [2024-06-14 13:10:26,863 INFO L125 PetriNetUnfolderBase]: For 333011/333044 co-relation queries the response was YES. [2024-06-14 13:10:26,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34795 conditions, 3861 events. 2467/3861 cut-off events. For 333011/333044 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20898 event pairs, 549 based on Foata normal form. 27/3888 useless extension candidates. Maximal degree in co-relation 34679. Up to 3626 conditions per place. [2024-06-14 13:10:26,905 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 267 selfloop transitions, 59 changer transitions 0/330 dead transitions. [2024-06-14 13:10:26,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 330 transitions, 4747 flow [2024-06-14 13:10:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:10:26,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:10:26,912 INFO L175 Difference]: Start difference. First operand has 236 places, 309 transitions, 3827 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:10:26,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 330 transitions, 4747 flow [2024-06-14 13:10:27,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 330 transitions, 4654 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 13:10:27,349 INFO L231 Difference]: Finished difference. Result has 241 places, 312 transitions, 3937 flow [2024-06-14 13:10:27,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3937, PETRI_PLACES=241, PETRI_TRANSITIONS=312} [2024-06-14 13:10:27,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 13:10:27,349 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 312 transitions, 3937 flow [2024-06-14 13:10:27,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:27,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:27,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:27,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:10:27,350 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:27,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:27,350 INFO L85 PathProgramCache]: Analyzing trace with hash -757404392, now seen corresponding path program 6 times [2024-06-14 13:10:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906391498] [2024-06-14 13:10:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:29,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906391498] [2024-06-14 13:10:29,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906391498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:29,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:29,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:29,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641381886] [2024-06-14 13:10:29,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:29,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:29,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:29,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:29,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:29,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:10:29,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 312 transitions, 3937 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:29,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:29,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:10:29,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:31,562 INFO L124 PetriNetUnfolderBase]: 2477/3875 cut-off events. [2024-06-14 13:10:31,562 INFO L125 PetriNetUnfolderBase]: For 341687/341720 co-relation queries the response was YES. [2024-06-14 13:10:31,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34977 conditions, 3875 events. 2477/3875 cut-off events. For 341687/341720 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21026 event pairs, 552 based on Foata normal form. 27/3902 useless extension candidates. Maximal degree in co-relation 34858. Up to 3636 conditions per place. [2024-06-14 13:10:31,674 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 261 selfloop transitions, 67 changer transitions 0/332 dead transitions. [2024-06-14 13:10:31,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 332 transitions, 4861 flow [2024-06-14 13:10:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:31,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 13:10:31,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 13:10:31,676 INFO L175 Difference]: Start difference. First operand has 241 places, 312 transitions, 3937 flow. Second operand 8 states and 124 transitions. [2024-06-14 13:10:31,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 332 transitions, 4861 flow [2024-06-14 13:10:32,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 332 transitions, 4698 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:32,162 INFO L231 Difference]: Finished difference. Result has 244 places, 315 transitions, 3998 flow [2024-06-14 13:10:32,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3782, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3998, PETRI_PLACES=244, PETRI_TRANSITIONS=315} [2024-06-14 13:10:32,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-14 13:10:32,162 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 315 transitions, 3998 flow [2024-06-14 13:10:32,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:32,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:32,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:32,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:10:32,163 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:32,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash -456906818, now seen corresponding path program 7 times [2024-06-14 13:10:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:32,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922855454] [2024-06-14 13:10:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:32,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:34,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:34,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922855454] [2024-06-14 13:10:34,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922855454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:34,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:34,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:34,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149250836] [2024-06-14 13:10:34,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:34,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:34,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:34,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:10:34,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 315 transitions, 3998 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:34,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:34,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:10:34,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:36,651 INFO L124 PetriNetUnfolderBase]: 2471/3867 cut-off events. [2024-06-14 13:10:36,652 INFO L125 PetriNetUnfolderBase]: For 346667/346700 co-relation queries the response was YES. [2024-06-14 13:10:36,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34853 conditions, 3867 events. 2471/3867 cut-off events. For 346667/346700 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20979 event pairs, 549 based on Foata normal form. 27/3894 useless extension candidates. Maximal degree in co-relation 34733. Up to 3631 conditions per place. [2024-06-14 13:10:36,693 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 263 selfloop transitions, 64 changer transitions 0/331 dead transitions. [2024-06-14 13:10:36,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 331 transitions, 4712 flow [2024-06-14 13:10:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:10:36,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35755813953488375 [2024-06-14 13:10:36,695 INFO L175 Difference]: Start difference. First operand has 244 places, 315 transitions, 3998 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:10:36,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 331 transitions, 4712 flow [2024-06-14 13:10:37,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 331 transitions, 4451 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:37,265 INFO L231 Difference]: Finished difference. Result has 246 places, 315 transitions, 3872 flow [2024-06-14 13:10:37,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3737, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3872, PETRI_PLACES=246, PETRI_TRANSITIONS=315} [2024-06-14 13:10:37,265 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 13:10:37,265 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 315 transitions, 3872 flow [2024-06-14 13:10:37,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-14 13:10:37,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:37,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:37,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:10:37,266 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:37,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:37,266 INFO L85 PathProgramCache]: Analyzing trace with hash -462208190, now seen corresponding path program 2 times [2024-06-14 13:10:37,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:37,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003286499] [2024-06-14 13:10:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:37,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:40,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003286499] [2024-06-14 13:10:40,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003286499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:40,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:40,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:40,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616834979] [2024-06-14 13:10:40,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:40,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:40,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:40,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:40,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:41,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:41,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 315 transitions, 3872 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:10:41,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:41,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:41,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:42,608 INFO L124 PetriNetUnfolderBase]: 2443/3832 cut-off events. [2024-06-14 13:10:42,608 INFO L125 PetriNetUnfolderBase]: For 373770/373773 co-relation queries the response was YES. [2024-06-14 13:10:42,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34459 conditions, 3832 events. 2443/3832 cut-off events. For 373770/373773 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20986 event pairs, 537 based on Foata normal form. 12/3831 useless extension candidates. Maximal degree in co-relation 34339. Up to 3489 conditions per place. [2024-06-14 13:10:42,651 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 267 selfloop transitions, 32 changer transitions 0/335 dead transitions. [2024-06-14 13:10:42,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 335 transitions, 4596 flow [2024-06-14 13:10:42,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:42,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:10:42,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:10:42,652 INFO L175 Difference]: Start difference. First operand has 246 places, 315 transitions, 3872 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:10:42,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 335 transitions, 4596 flow [2024-06-14 13:10:43,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 335 transitions, 4483 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:43,204 INFO L231 Difference]: Finished difference. Result has 248 places, 316 transitions, 3849 flow [2024-06-14 13:10:43,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3759, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3849, PETRI_PLACES=248, PETRI_TRANSITIONS=316} [2024-06-14 13:10:43,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-14 13:10:43,204 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 316 transitions, 3849 flow [2024-06-14 13:10:43,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:10:43,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:43,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:43,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:10:43,205 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:43,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash -448327010, now seen corresponding path program 3 times [2024-06-14 13:10:43,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:43,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132695830] [2024-06-14 13:10:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:43,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:46,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:46,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132695830] [2024-06-14 13:10:46,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132695830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:46,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:46,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:46,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746148066] [2024-06-14 13:10:46,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:46,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:46,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:46,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:46,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:46,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 316 transitions, 3849 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:10:46,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:46,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:46,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:48,415 INFO L124 PetriNetUnfolderBase]: 2444/3840 cut-off events. [2024-06-14 13:10:48,415 INFO L125 PetriNetUnfolderBase]: For 369781/369784 co-relation queries the response was YES. [2024-06-14 13:10:48,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34374 conditions, 3840 events. 2444/3840 cut-off events. For 369781/369784 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21044 event pairs, 531 based on Foata normal form. 8/3838 useless extension candidates. Maximal degree in co-relation 34253. Up to 3420 conditions per place. [2024-06-14 13:10:48,458 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 268 selfloop transitions, 34 changer transitions 0/338 dead transitions. [2024-06-14 13:10:48,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 338 transitions, 4605 flow [2024-06-14 13:10:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:10:48,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:10:48,459 INFO L175 Difference]: Start difference. First operand has 248 places, 316 transitions, 3849 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:10:48,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 338 transitions, 4605 flow [2024-06-14 13:10:48,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 338 transitions, 4537 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:48,984 INFO L231 Difference]: Finished difference. Result has 250 places, 317 transitions, 3875 flow [2024-06-14 13:10:48,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3875, PETRI_PLACES=250, PETRI_TRANSITIONS=317} [2024-06-14 13:10:48,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 13:10:48,985 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 317 transitions, 3875 flow [2024-06-14 13:10:48,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:10:48,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:48,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:48,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:10:48,985 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:48,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash 477391550, now seen corresponding path program 1 times [2024-06-14 13:10:48,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:48,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331405670] [2024-06-14 13:10:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:48,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:51,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:51,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331405670] [2024-06-14 13:10:51,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331405670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:51,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:51,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078868559] [2024-06-14 13:10:51,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:51,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:51,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:51,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:51,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:51,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:51,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 317 transitions, 3875 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:10:51,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:51,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:51,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:53,485 INFO L124 PetriNetUnfolderBase]: 2469/3910 cut-off events. [2024-06-14 13:10:53,486 INFO L125 PetriNetUnfolderBase]: For 382957/382962 co-relation queries the response was YES. [2024-06-14 13:10:53,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35308 conditions, 3910 events. 2469/3910 cut-off events. For 382957/382962 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21570 event pairs, 500 based on Foata normal form. 8/3913 useless extension candidates. Maximal degree in co-relation 35186. Up to 3495 conditions per place. [2024-06-14 13:10:53,528 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 253 selfloop transitions, 64 changer transitions 0/354 dead transitions. [2024-06-14 13:10:53,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 354 transitions, 4831 flow [2024-06-14 13:10:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:10:53,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 13:10:53,529 INFO L175 Difference]: Start difference. First operand has 250 places, 317 transitions, 3875 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:10:53,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 354 transitions, 4831 flow [2024-06-14 13:10:54,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 354 transitions, 4755 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:54,249 INFO L231 Difference]: Finished difference. Result has 253 places, 321 transitions, 4036 flow [2024-06-14 13:10:54,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4036, PETRI_PLACES=253, PETRI_TRANSITIONS=321} [2024-06-14 13:10:54,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-14 13:10:54,250 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 321 transitions, 4036 flow [2024-06-14 13:10:54,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:10:54,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:54,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:54,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:10:54,250 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:54,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:54,250 INFO L85 PathProgramCache]: Analyzing trace with hash 477452124, now seen corresponding path program 1 times [2024-06-14 13:10:54,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:54,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029357405] [2024-06-14 13:10:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:57,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:57,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029357405] [2024-06-14 13:10:57,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029357405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:57,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:57,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:57,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516850144] [2024-06-14 13:10:57,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:57,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:57,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:57,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:57,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:10:57,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 321 transitions, 4036 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:57,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:57,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:10:57,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:58,864 INFO L124 PetriNetUnfolderBase]: 2569/4026 cut-off events. [2024-06-14 13:10:58,865 INFO L125 PetriNetUnfolderBase]: For 391518/391520 co-relation queries the response was YES. [2024-06-14 13:10:58,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36481 conditions, 4026 events. 2569/4026 cut-off events. For 391518/391520 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22288 event pairs, 1211 based on Foata normal form. 2/4027 useless extension candidates. Maximal degree in co-relation 36358. Up to 3775 conditions per place. [2024-06-14 13:10:58,910 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 283 selfloop transitions, 85 changer transitions 0/372 dead transitions. [2024-06-14 13:10:58,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 372 transitions, 5412 flow [2024-06-14 13:10:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:10:58,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 13:10:58,912 INFO L175 Difference]: Start difference. First operand has 253 places, 321 transitions, 4036 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:10:58,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 372 transitions, 5412 flow [2024-06-14 13:10:59,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 372 transitions, 5259 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:59,491 INFO L231 Difference]: Finished difference. Result has 260 places, 337 transitions, 4401 flow [2024-06-14 13:10:59,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4401, PETRI_PLACES=260, PETRI_TRANSITIONS=337} [2024-06-14 13:10:59,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-14 13:10:59,491 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 337 transitions, 4401 flow [2024-06-14 13:10:59,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:59,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:59,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:59,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:10:59,492 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:59,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1051921898, now seen corresponding path program 2 times [2024-06-14 13:10:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:59,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840296897] [2024-06-14 13:10:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:59,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:02,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:02,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840296897] [2024-06-14 13:11:02,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840296897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:02,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:02,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:02,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118330395] [2024-06-14 13:11:02,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:02,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:02,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:02,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:02,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:02,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 337 transitions, 4401 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:11:02,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:02,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:02,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:04,101 INFO L124 PetriNetUnfolderBase]: 2503/3956 cut-off events. [2024-06-14 13:11:04,102 INFO L125 PetriNetUnfolderBase]: For 408844/408849 co-relation queries the response was YES. [2024-06-14 13:11:04,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36526 conditions, 3956 events. 2503/3956 cut-off events. For 408844/408849 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21779 event pairs, 544 based on Foata normal form. 8/3959 useless extension candidates. Maximal degree in co-relation 36398. Up to 3598 conditions per place. [2024-06-14 13:11:04,147 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 256 selfloop transitions, 70 changer transitions 0/367 dead transitions. [2024-06-14 13:11:04,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 367 transitions, 5174 flow [2024-06-14 13:11:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-14 13:11:04,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-14 13:11:04,148 INFO L175 Difference]: Start difference. First operand has 260 places, 337 transitions, 4401 flow. Second operand 10 states and 157 transitions. [2024-06-14 13:11:04,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 367 transitions, 5174 flow [2024-06-14 13:11:04,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 367 transitions, 5060 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 13:11:04,694 INFO L231 Difference]: Finished difference. Result has 268 places, 341 transitions, 4494 flow [2024-06-14 13:11:04,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4287, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4494, PETRI_PLACES=268, PETRI_TRANSITIONS=341} [2024-06-14 13:11:04,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-14 13:11:04,694 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 341 transitions, 4494 flow [2024-06-14 13:11:04,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:11:04,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:04,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:04,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:11:04,695 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:04,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:04,695 INFO L85 PathProgramCache]: Analyzing trace with hash 480248510, now seen corresponding path program 3 times [2024-06-14 13:11:04,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:04,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521196094] [2024-06-14 13:11:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:08,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:08,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521196094] [2024-06-14 13:11:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521196094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:08,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:08,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338389602] [2024-06-14 13:11:08,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:08,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:08,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:08,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:08,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:08,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 341 transitions, 4494 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:11:08,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:08,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:08,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:09,637 INFO L124 PetriNetUnfolderBase]: 2493/3942 cut-off events. [2024-06-14 13:11:09,637 INFO L125 PetriNetUnfolderBase]: For 410197/410202 co-relation queries the response was YES. [2024-06-14 13:11:09,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36382 conditions, 3942 events. 2493/3942 cut-off events. For 410197/410202 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21699 event pairs, 540 based on Foata normal form. 8/3945 useless extension candidates. Maximal degree in co-relation 36251. Up to 3653 conditions per place. [2024-06-14 13:11:09,681 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 292 selfloop transitions, 32 changer transitions 0/365 dead transitions. [2024-06-14 13:11:09,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 365 transitions, 5254 flow [2024-06-14 13:11:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:11:09,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-14 13:11:09,682 INFO L175 Difference]: Start difference. First operand has 268 places, 341 transitions, 4494 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:11:09,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 365 transitions, 5254 flow [2024-06-14 13:11:10,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 365 transitions, 5104 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:10,495 INFO L231 Difference]: Finished difference. Result has 271 places, 343 transitions, 4472 flow [2024-06-14 13:11:10,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4344, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4472, PETRI_PLACES=271, PETRI_TRANSITIONS=343} [2024-06-14 13:11:10,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-14 13:11:10,495 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 343 transitions, 4472 flow [2024-06-14 13:11:10,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:11:10,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:10,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:10,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:11:10,496 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:10,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash 595539804, now seen corresponding path program 2 times [2024-06-14 13:11:10,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:10,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440335309] [2024-06-14 13:11:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:10,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:13,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:13,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440335309] [2024-06-14 13:11:13,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440335309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:13,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:13,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:13,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138927389] [2024-06-14 13:11:13,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:13,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:13,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:13,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:13,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:13,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:11:13,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 343 transitions, 4472 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:13,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:13,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:11:13,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:14,780 INFO L124 PetriNetUnfolderBase]: 2601/4072 cut-off events. [2024-06-14 13:11:14,780 INFO L125 PetriNetUnfolderBase]: For 423357/423357 co-relation queries the response was YES. [2024-06-14 13:11:14,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37628 conditions, 4072 events. 2601/4072 cut-off events. For 423357/423357 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22575 event pairs, 1206 based on Foata normal form. 2/4074 useless extension candidates. Maximal degree in co-relation 37495. Up to 3909 conditions per place. [2024-06-14 13:11:14,830 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 319 selfloop transitions, 51 changer transitions 0/374 dead transitions. [2024-06-14 13:11:14,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 374 transitions, 5663 flow [2024-06-14 13:11:14,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-14 13:11:14,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511627906976744 [2024-06-14 13:11:14,831 INFO L175 Difference]: Start difference. First operand has 271 places, 343 transitions, 4472 flow. Second operand 10 states and 151 transitions. [2024-06-14 13:11:14,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 374 transitions, 5663 flow [2024-06-14 13:11:15,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 374 transitions, 5553 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:15,562 INFO L231 Difference]: Finished difference. Result has 275 places, 350 transitions, 4582 flow [2024-06-14 13:11:15,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4582, PETRI_PLACES=275, PETRI_TRANSITIONS=350} [2024-06-14 13:11:15,562 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 13:11:15,563 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 350 transitions, 4582 flow [2024-06-14 13:11:15,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:15,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:15,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:15,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:11:15,563 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:15,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash 595717434, now seen corresponding path program 3 times [2024-06-14 13:11:15,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:15,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362208899] [2024-06-14 13:11:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:15,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:18,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:18,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362208899] [2024-06-14 13:11:18,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362208899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:18,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:18,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:18,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894511022] [2024-06-14 13:11:18,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:18,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:18,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:18,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:11:18,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 350 transitions, 4582 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:18,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:18,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:11:18,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:20,066 INFO L124 PetriNetUnfolderBase]: 2613/4089 cut-off events. [2024-06-14 13:11:20,066 INFO L125 PetriNetUnfolderBase]: For 432627/432627 co-relation queries the response was YES. [2024-06-14 13:11:20,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37870 conditions, 4089 events. 2613/4089 cut-off events. For 432627/432627 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22679 event pairs, 1212 based on Foata normal form. 2/4091 useless extension candidates. Maximal degree in co-relation 37735. Up to 3951 conditions per place. [2024-06-14 13:11:20,111 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 330 selfloop transitions, 41 changer transitions 0/375 dead transitions. [2024-06-14 13:11:20,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 375 transitions, 5597 flow [2024-06-14 13:11:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-14 13:11:20,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3395348837209302 [2024-06-14 13:11:20,112 INFO L175 Difference]: Start difference. First operand has 275 places, 350 transitions, 4582 flow. Second operand 10 states and 146 transitions. [2024-06-14 13:11:20,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 375 transitions, 5597 flow [2024-06-14 13:11:20,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 375 transitions, 5504 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:20,849 INFO L231 Difference]: Finished difference. Result has 279 places, 354 transitions, 4666 flow [2024-06-14 13:11:20,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4492, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4666, PETRI_PLACES=279, PETRI_TRANSITIONS=354} [2024-06-14 13:11:20,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 13:11:20,849 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 354 transitions, 4666 flow [2024-06-14 13:11:20,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:20,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:20,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:20,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:11:20,850 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:20,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash -933649520, now seen corresponding path program 1 times [2024-06-14 13:11:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:20,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27056271] [2024-06-14 13:11:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:20,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:24,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:24,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27056271] [2024-06-14 13:11:24,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27056271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:24,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:24,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:24,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267083014] [2024-06-14 13:11:24,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:24,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:24,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:24,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:24,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:11:24,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 354 transitions, 4666 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:24,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:24,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:11:24,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:25,768 INFO L124 PetriNetUnfolderBase]: 2621/4101 cut-off events. [2024-06-14 13:11:25,769 INFO L125 PetriNetUnfolderBase]: For 445033/445033 co-relation queries the response was YES. [2024-06-14 13:11:25,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38200 conditions, 4101 events. 2621/4101 cut-off events. For 445033/445033 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 22735 event pairs, 1202 based on Foata normal form. 2/4103 useless extension candidates. Maximal degree in co-relation 38063. Up to 3967 conditions per place. [2024-06-14 13:11:25,819 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 332 selfloop transitions, 37 changer transitions 0/373 dead transitions. [2024-06-14 13:11:25,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 373 transitions, 5490 flow [2024-06-14 13:11:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 13:11:25,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 13:11:25,821 INFO L175 Difference]: Start difference. First operand has 279 places, 354 transitions, 4666 flow. Second operand 8 states and 124 transitions. [2024-06-14 13:11:25,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 373 transitions, 5490 flow [2024-06-14 13:11:26,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 373 transitions, 5404 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:26,696 INFO L231 Difference]: Finished difference. Result has 281 places, 356 transitions, 4705 flow [2024-06-14 13:11:26,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4705, PETRI_PLACES=281, PETRI_TRANSITIONS=356} [2024-06-14 13:11:26,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-14 13:11:26,696 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 356 transitions, 4705 flow [2024-06-14 13:11:26,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:26,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:26,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:26,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:11:26,697 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:26,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash -933829444, now seen corresponding path program 4 times [2024-06-14 13:11:26,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:26,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876611518] [2024-06-14 13:11:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:26,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:29,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:29,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876611518] [2024-06-14 13:11:29,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876611518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:29,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:29,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:29,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346866150] [2024-06-14 13:11:29,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:29,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:29,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:29,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:29,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:29,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:11:29,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 356 transitions, 4705 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:29,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:29,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:11:29,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:31,027 INFO L124 PetriNetUnfolderBase]: 2615/4093 cut-off events. [2024-06-14 13:11:31,027 INFO L125 PetriNetUnfolderBase]: For 450198/450198 co-relation queries the response was YES. [2024-06-14 13:11:31,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38234 conditions, 4093 events. 2615/4093 cut-off events. For 450198/450198 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 22734 event pairs, 1201 based on Foata normal form. 2/4095 useless extension candidates. Maximal degree in co-relation 38096. Up to 3938 conditions per place. [2024-06-14 13:11:31,072 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 321 selfloop transitions, 53 changer transitions 0/378 dead transitions. [2024-06-14 13:11:31,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 378 transitions, 5683 flow [2024-06-14 13:11:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:11:31,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 13:11:31,073 INFO L175 Difference]: Start difference. First operand has 281 places, 356 transitions, 4705 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:11:31,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 378 transitions, 5683 flow [2024-06-14 13:11:31,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 378 transitions, 5552 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:31,866 INFO L231 Difference]: Finished difference. Result has 284 places, 357 transitions, 4705 flow [2024-06-14 13:11:31,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4705, PETRI_PLACES=284, PETRI_TRANSITIONS=357} [2024-06-14 13:11:31,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-14 13:11:31,867 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 357 transitions, 4705 flow [2024-06-14 13:11:31,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:31,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:31,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:31,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:11:31,867 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:31,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash 595539680, now seen corresponding path program 4 times [2024-06-14 13:11:31,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:31,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112076800] [2024-06-14 13:11:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:31,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:35,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:35,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112076800] [2024-06-14 13:11:35,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112076800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:35,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:35,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:35,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458935191] [2024-06-14 13:11:35,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:35,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:35,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:35,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:35,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 357 transitions, 4705 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:11:35,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:35,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:35,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:36,724 INFO L124 PetriNetUnfolderBase]: 2541/4015 cut-off events. [2024-06-14 13:11:36,725 INFO L125 PetriNetUnfolderBase]: For 465100/465105 co-relation queries the response was YES. [2024-06-14 13:11:36,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37644 conditions, 4015 events. 2541/4015 cut-off events. For 465100/465105 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22146 event pairs, 540 based on Foata normal form. 8/4018 useless extension candidates. Maximal degree in co-relation 37505. Up to 3718 conditions per place. [2024-06-14 13:11:36,769 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 289 selfloop transitions, 41 changer transitions 0/377 dead transitions. [2024-06-14 13:11:36,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 377 transitions, 5447 flow [2024-06-14 13:11:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 13:11:36,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35658914728682173 [2024-06-14 13:11:36,770 INFO L175 Difference]: Start difference. First operand has 284 places, 357 transitions, 4705 flow. Second operand 9 states and 138 transitions. [2024-06-14 13:11:36,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 377 transitions, 5447 flow [2024-06-14 13:11:37,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 377 transitions, 5338 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:37,615 INFO L231 Difference]: Finished difference. Result has 286 places, 359 transitions, 4724 flow [2024-06-14 13:11:37,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4596, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4724, PETRI_PLACES=286, PETRI_TRANSITIONS=359} [2024-06-14 13:11:37,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 13:11:37,616 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 359 transitions, 4724 flow [2024-06-14 13:11:37,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:11:37,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:37,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:37,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:11:37,616 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:37,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:37,617 INFO L85 PathProgramCache]: Analyzing trace with hash 595724130, now seen corresponding path program 1 times [2024-06-14 13:11:37,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:37,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59475772] [2024-06-14 13:11:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:37,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:40,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:40,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59475772] [2024-06-14 13:11:40,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59475772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:40,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012629664] [2024-06-14 13:11:40,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:40,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:40,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:40,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:11:40,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 359 transitions, 4724 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:40,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:40,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:11:40,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:42,346 INFO L124 PetriNetUnfolderBase]: 2626/4110 cut-off events. [2024-06-14 13:11:42,347 INFO L125 PetriNetUnfolderBase]: For 467755/467755 co-relation queries the response was YES. [2024-06-14 13:11:42,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38524 conditions, 4110 events. 2626/4110 cut-off events. For 467755/467755 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22795 event pairs, 1204 based on Foata normal form. 1/4111 useless extension candidates. Maximal degree in co-relation 38384. Up to 3973 conditions per place. [2024-06-14 13:11:42,397 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 43 changer transitions 0/376 dead transitions. [2024-06-14 13:11:42,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 376 transitions, 5518 flow [2024-06-14 13:11:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:11:42,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 13:11:42,398 INFO L175 Difference]: Start difference. First operand has 286 places, 359 transitions, 4724 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:11:42,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 376 transitions, 5518 flow [2024-06-14 13:11:43,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 376 transitions, 5380 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:43,252 INFO L231 Difference]: Finished difference. Result has 287 places, 359 transitions, 4684 flow [2024-06-14 13:11:43,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4586, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4684, PETRI_PLACES=287, PETRI_TRANSITIONS=359} [2024-06-14 13:11:43,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-14 13:11:43,252 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 359 transitions, 4684 flow [2024-06-14 13:11:43,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:43,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:43,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:43,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:11:43,253 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:43,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:43,253 INFO L85 PathProgramCache]: Analyzing trace with hash 41290810, now seen corresponding path program 5 times [2024-06-14 13:11:43,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:43,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97445253] [2024-06-14 13:11:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:43,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:45,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:45,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97445253] [2024-06-14 13:11:45,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97445253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:45,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:45,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:45,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021844822] [2024-06-14 13:11:45,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:45,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:45,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:45,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:45,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:11:45,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 359 transitions, 4684 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:45,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:45,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:11:45,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:47,508 INFO L124 PetriNetUnfolderBase]: 2636/4125 cut-off events. [2024-06-14 13:11:47,508 INFO L125 PetriNetUnfolderBase]: For 481357/481369 co-relation queries the response was YES. [2024-06-14 13:11:47,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38685 conditions, 4125 events. 2636/4125 cut-off events. For 481357/481369 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22924 event pairs, 1207 based on Foata normal form. 14/4139 useless extension candidates. Maximal degree in co-relation 38544. Up to 3935 conditions per place. [2024-06-14 13:11:47,556 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 316 selfloop transitions, 64 changer transitions 0/384 dead transitions. [2024-06-14 13:11:47,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 384 transitions, 5888 flow [2024-06-14 13:11:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:11:47,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35400516795865633 [2024-06-14 13:11:47,557 INFO L175 Difference]: Start difference. First operand has 287 places, 359 transitions, 4684 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:11:47,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 384 transitions, 5888 flow [2024-06-14 13:11:48,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 384 transitions, 5802 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:48,398 INFO L231 Difference]: Finished difference. Result has 290 places, 364 transitions, 4818 flow [2024-06-14 13:11:48,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4598, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4818, PETRI_PLACES=290, PETRI_TRANSITIONS=364} [2024-06-14 13:11:48,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-14 13:11:48,399 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 364 transitions, 4818 flow [2024-06-14 13:11:48,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:48,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:48,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:48,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:11:48,400 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:48,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:48,400 INFO L85 PathProgramCache]: Analyzing trace with hash -743104712, now seen corresponding path program 2 times [2024-06-14 13:11:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:48,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129191593] [2024-06-14 13:11:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:48,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:52,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:52,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129191593] [2024-06-14 13:11:52,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129191593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:52,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:52,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:52,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894633176] [2024-06-14 13:11:52,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:52,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:52,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:52,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:52,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:52,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:11:52,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 364 transitions, 4818 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:52,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:52,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:11:52,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:53,756 INFO L124 PetriNetUnfolderBase]: 2644/4137 cut-off events. [2024-06-14 13:11:53,757 INFO L125 PetriNetUnfolderBase]: For 493652/493664 co-relation queries the response was YES. [2024-06-14 13:11:53,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39043 conditions, 4137 events. 2644/4137 cut-off events. For 493652/493664 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22954 event pairs, 1199 based on Foata normal form. 14/4151 useless extension candidates. Maximal degree in co-relation 38900. Up to 3977 conditions per place. [2024-06-14 13:11:53,811 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 337 selfloop transitions, 42 changer transitions 0/383 dead transitions. [2024-06-14 13:11:53,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 383 transitions, 5856 flow [2024-06-14 13:11:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 13:11:53,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34593023255813954 [2024-06-14 13:11:53,813 INFO L175 Difference]: Start difference. First operand has 290 places, 364 transitions, 4818 flow. Second operand 8 states and 119 transitions. [2024-06-14 13:11:53,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 383 transitions, 5856 flow [2024-06-14 13:11:54,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 383 transitions, 5717 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:11:54,726 INFO L231 Difference]: Finished difference. Result has 293 places, 368 transitions, 4864 flow [2024-06-14 13:11:54,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4864, PETRI_PLACES=293, PETRI_TRANSITIONS=368} [2024-06-14 13:11:54,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 13:11:54,727 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 368 transitions, 4864 flow [2024-06-14 13:11:54,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:54,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:54,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:54,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:11:54,727 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:54,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash -448617728, now seen corresponding path program 3 times [2024-06-14 13:11:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:54,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919202646] [2024-06-14 13:11:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:54,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:58,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:58,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919202646] [2024-06-14 13:11:58,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919202646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:58,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:58,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:58,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866392642] [2024-06-14 13:11:58,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:58,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:58,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:58,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:58,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:58,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:11:58,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 368 transitions, 4864 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:58,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:58,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:11:58,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:00,312 INFO L124 PetriNetUnfolderBase]: 2652/4149 cut-off events. [2024-06-14 13:12:00,313 INFO L125 PetriNetUnfolderBase]: For 506908/506920 co-relation queries the response was YES. [2024-06-14 13:12:00,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39430 conditions, 4149 events. 2652/4149 cut-off events. For 506908/506920 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23045 event pairs, 1216 based on Foata normal form. 14/4163 useless extension candidates. Maximal degree in co-relation 39285. Up to 4014 conditions per place. [2024-06-14 13:12:00,366 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 341 selfloop transitions, 38 changer transitions 0/383 dead transitions. [2024-06-14 13:12:00,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 383 transitions, 5704 flow [2024-06-14 13:12:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 13:12:00,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3430232558139535 [2024-06-14 13:12:00,368 INFO L175 Difference]: Start difference. First operand has 293 places, 368 transitions, 4864 flow. Second operand 8 states and 118 transitions. [2024-06-14 13:12:00,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 383 transitions, 5704 flow [2024-06-14 13:12:01,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 383 transitions, 5588 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:01,389 INFO L231 Difference]: Finished difference. Result has 297 places, 370 transitions, 4883 flow [2024-06-14 13:12:01,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4768, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4883, PETRI_PLACES=297, PETRI_TRANSITIONS=370} [2024-06-14 13:12:01,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-14 13:12:01,389 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 370 transitions, 4883 flow [2024-06-14 13:12:01,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:01,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:01,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:01,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:12:01,390 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:01,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:01,390 INFO L85 PathProgramCache]: Analyzing trace with hash -979576742, now seen corresponding path program 4 times [2024-06-14 13:12:01,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:01,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455154664] [2024-06-14 13:12:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:01,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:04,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:04,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455154664] [2024-06-14 13:12:04,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455154664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:04,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:04,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786140209] [2024-06-14 13:12:04,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:04,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:04,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:04,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 370 transitions, 4883 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:04,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:04,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:04,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:06,830 INFO L124 PetriNetUnfolderBase]: 2647/4142 cut-off events. [2024-06-14 13:12:06,830 INFO L125 PetriNetUnfolderBase]: For 511601/511613 co-relation queries the response was YES. [2024-06-14 13:12:06,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39317 conditions, 4142 events. 2647/4142 cut-off events. For 511601/511613 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23004 event pairs, 1207 based on Foata normal form. 14/4156 useless extension candidates. Maximal degree in co-relation 39170. Up to 4007 conditions per place. [2024-06-14 13:12:06,876 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 342 selfloop transitions, 37 changer transitions 0/383 dead transitions. [2024-06-14 13:12:06,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 383 transitions, 5673 flow [2024-06-14 13:12:06,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:12:06,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-14 13:12:06,877 INFO L175 Difference]: Start difference. First operand has 297 places, 370 transitions, 4883 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:12:06,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 383 transitions, 5673 flow [2024-06-14 13:12:07,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 383 transitions, 5574 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:07,734 INFO L231 Difference]: Finished difference. Result has 299 places, 370 transitions, 4863 flow [2024-06-14 13:12:07,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4784, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4863, PETRI_PLACES=299, PETRI_TRANSITIONS=370} [2024-06-14 13:12:07,734 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-14 13:12:07,734 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 370 transitions, 4863 flow [2024-06-14 13:12:07,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:07,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:07,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:07,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:12:07,734 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:07,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:07,735 INFO L85 PathProgramCache]: Analyzing trace with hash -684977786, now seen corresponding path program 5 times [2024-06-14 13:12:07,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:07,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590232462] [2024-06-14 13:12:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:07,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:10,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:10,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590232462] [2024-06-14 13:12:10,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590232462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:10,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:10,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:10,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505049917] [2024-06-14 13:12:10,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:10,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:10,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 370 transitions, 4863 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:12:10,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:10,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:10,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:12,255 INFO L124 PetriNetUnfolderBase]: 2538/4018 cut-off events. [2024-06-14 13:12:12,256 INFO L125 PetriNetUnfolderBase]: For 514644/514678 co-relation queries the response was YES. [2024-06-14 13:12:12,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38017 conditions, 4018 events. 2538/4018 cut-off events. For 514644/514678 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 22259 event pairs, 547 based on Foata normal form. 29/4042 useless extension candidates. Maximal degree in co-relation 37869. Up to 3721 conditions per place. [2024-06-14 13:12:12,301 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 291 selfloop transitions, 41 changer transitions 0/384 dead transitions. [2024-06-14 13:12:12,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 384 transitions, 5561 flow [2024-06-14 13:12:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-14 13:12:12,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3462532299741602 [2024-06-14 13:12:12,302 INFO L175 Difference]: Start difference. First operand has 299 places, 370 transitions, 4863 flow. Second operand 9 states and 134 transitions. [2024-06-14 13:12:12,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 384 transitions, 5561 flow [2024-06-14 13:12:13,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 384 transitions, 5446 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:12:13,186 INFO L231 Difference]: Finished difference. Result has 301 places, 370 transitions, 4836 flow [2024-06-14 13:12:13,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4748, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4836, PETRI_PLACES=301, PETRI_TRANSITIONS=370} [2024-06-14 13:12:13,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-14 13:12:13,186 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 370 transitions, 4836 flow [2024-06-14 13:12:13,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 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) [2024-06-14 13:12:13,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:13,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:12:13,187 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:13,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash -684973012, now seen corresponding path program 6 times [2024-06-14 13:12:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:13,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921850857] [2024-06-14 13:12:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:16,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:16,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921850857] [2024-06-14 13:12:16,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921850857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:16,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:16,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:16,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435977023] [2024-06-14 13:12:16,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:16,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:16,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:16,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:16,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:16,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 370 transitions, 4836 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:16,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:16,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:16,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:17,743 INFO L124 PetriNetUnfolderBase]: 2647/4142 cut-off events. [2024-06-14 13:12:17,744 INFO L125 PetriNetUnfolderBase]: For 521843/521855 co-relation queries the response was YES. [2024-06-14 13:12:17,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39213 conditions, 4142 events. 2647/4142 cut-off events. For 521843/521855 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 23009 event pairs, 1204 based on Foata normal form. 14/4156 useless extension candidates. Maximal degree in co-relation 39064. Up to 3977 conditions per place. [2024-06-14 13:12:17,800 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 327 selfloop transitions, 60 changer transitions 0/391 dead transitions. [2024-06-14 13:12:17,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 391 transitions, 5886 flow [2024-06-14 13:12:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:12:17,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-14 13:12:17,801 INFO L175 Difference]: Start difference. First operand has 301 places, 370 transitions, 4836 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:12:17,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 391 transitions, 5886 flow [2024-06-14 13:12:18,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 391 transitions, 5782 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:12:18,667 INFO L231 Difference]: Finished difference. Result has 302 places, 373 transitions, 4915 flow [2024-06-14 13:12:18,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4915, PETRI_PLACES=302, PETRI_TRANSITIONS=373} [2024-06-14 13:12:18,668 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-14 13:12:18,668 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 373 transitions, 4915 flow [2024-06-14 13:12:18,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:18,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:18,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:18,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:12:18,668 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:18,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash -456898882, now seen corresponding path program 7 times [2024-06-14 13:12:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:18,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053751685] [2024-06-14 13:12:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:21,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:21,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053751685] [2024-06-14 13:12:21,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053751685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:21,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:21,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:21,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846161592] [2024-06-14 13:12:21,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:21,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:21,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:21,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:21,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:21,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 373 transitions, 4915 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:21,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:21,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:21,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:23,352 INFO L124 PetriNetUnfolderBase]: 2657/4156 cut-off events. [2024-06-14 13:12:23,352 INFO L125 PetriNetUnfolderBase]: For 534180/534192 co-relation queries the response was YES. [2024-06-14 13:12:23,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39501 conditions, 4156 events. 2657/4156 cut-off events. For 534180/534192 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23049 event pairs, 1212 based on Foata normal form. 14/4170 useless extension candidates. Maximal degree in co-relation 39351. Up to 4027 conditions per place. [2024-06-14 13:12:23,408 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 351 selfloop transitions, 36 changer transitions 0/391 dead transitions. [2024-06-14 13:12:23,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 391 transitions, 5793 flow [2024-06-14 13:12:23,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2024-06-14 13:12:23,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 13:12:23,409 INFO L175 Difference]: Start difference. First operand has 302 places, 373 transitions, 4915 flow. Second operand 9 states and 129 transitions. [2024-06-14 13:12:23,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 391 transitions, 5793 flow [2024-06-14 13:12:24,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 391 transitions, 5650 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:12:24,307 INFO L231 Difference]: Finished difference. Result has 304 places, 376 transitions, 4913 flow [2024-06-14 13:12:24,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4913, PETRI_PLACES=304, PETRI_TRANSITIONS=376} [2024-06-14 13:12:24,307 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-14 13:12:24,308 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 376 transitions, 4913 flow [2024-06-14 13:12:24,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:24,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:24,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:24,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:12:24,308 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:24,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash -979583686, now seen corresponding path program 8 times [2024-06-14 13:12:24,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:24,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866864792] [2024-06-14 13:12:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:24,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:27,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:27,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866864792] [2024-06-14 13:12:27,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866864792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:27,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:27,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:27,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883099731] [2024-06-14 13:12:27,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:27,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:27,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:27,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:27,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:27,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:27,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 376 transitions, 4913 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:27,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:27,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:27,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:28,966 INFO L124 PetriNetUnfolderBase]: 2659/4159 cut-off events. [2024-06-14 13:12:28,966 INFO L125 PetriNetUnfolderBase]: For 541765/541777 co-relation queries the response was YES. [2024-06-14 13:12:29,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39555 conditions, 4159 events. 2659/4159 cut-off events. For 541765/541777 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23139 event pairs, 1213 based on Foata normal form. 14/4173 useless extension candidates. Maximal degree in co-relation 39404. Up to 4030 conditions per place. [2024-06-14 13:12:29,024 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 356 selfloop transitions, 34 changer transitions 0/394 dead transitions. [2024-06-14 13:12:29,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 394 transitions, 5804 flow [2024-06-14 13:12:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-14 13:12:29,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3359173126614987 [2024-06-14 13:12:29,025 INFO L175 Difference]: Start difference. First operand has 304 places, 376 transitions, 4913 flow. Second operand 9 states and 130 transitions. [2024-06-14 13:12:29,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 394 transitions, 5804 flow [2024-06-14 13:12:30,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 394 transitions, 5729 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:30,075 INFO L231 Difference]: Finished difference. Result has 309 places, 379 transitions, 4981 flow [2024-06-14 13:12:30,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4838, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4981, PETRI_PLACES=309, PETRI_TRANSITIONS=379} [2024-06-14 13:12:30,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-14 13:12:30,076 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 379 transitions, 4981 flow [2024-06-14 13:12:30,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:30,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:30,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:30,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:12:30,076 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:30,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash -684793336, now seen corresponding path program 2 times [2024-06-14 13:12:30,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:30,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723930662] [2024-06-14 13:12:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:30,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:32,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:32,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723930662] [2024-06-14 13:12:32,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723930662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:32,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:32,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:32,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577691644] [2024-06-14 13:12:32,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:32,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:32,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:32,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 379 transitions, 4981 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:32,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:32,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:32,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:34,587 INFO L124 PetriNetUnfolderBase]: 2656/4155 cut-off events. [2024-06-14 13:12:34,587 INFO L125 PetriNetUnfolderBase]: For 547162/547174 co-relation queries the response was YES. [2024-06-14 13:12:34,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39560 conditions, 4155 events. 2656/4155 cut-off events. For 547162/547174 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23082 event pairs, 1212 based on Foata normal form. 13/4168 useless extension candidates. Maximal degree in co-relation 39408. Up to 4017 conditions per place. [2024-06-14 13:12:34,649 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 346 selfloop transitions, 42 changer transitions 0/392 dead transitions. [2024-06-14 13:12:34,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 392 transitions, 5796 flow [2024-06-14 13:12:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:12:34,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-14 13:12:34,651 INFO L175 Difference]: Start difference. First operand has 309 places, 379 transitions, 4981 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:12:34,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 392 transitions, 5796 flow [2024-06-14 13:12:35,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 392 transitions, 5681 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:35,739 INFO L231 Difference]: Finished difference. Result has 311 places, 379 transitions, 4961 flow [2024-06-14 13:12:35,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4866, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4961, PETRI_PLACES=311, PETRI_TRANSITIONS=379} [2024-06-14 13:12:35,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 13:12:35,740 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 379 transitions, 4961 flow [2024-06-14 13:12:35,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:35,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:35,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:35,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:12:35,741 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:35,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:35,742 INFO L85 PathProgramCache]: Analyzing trace with hash -884998775, now seen corresponding path program 1 times [2024-06-14 13:12:35,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:35,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812602233] [2024-06-14 13:12:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:35,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:38,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:38,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812602233] [2024-06-14 13:12:38,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812602233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:38,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:38,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:38,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083570341] [2024-06-14 13:12:38,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:38,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:38,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:38,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:38,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 379 transitions, 4961 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:38,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:38,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:38,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:39,997 INFO L124 PetriNetUnfolderBase]: 2684/4183 cut-off events. [2024-06-14 13:12:39,997 INFO L125 PetriNetUnfolderBase]: For 583003/583003 co-relation queries the response was YES. [2024-06-14 13:12:40,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39946 conditions, 4183 events. 2684/4183 cut-off events. For 583003/583003 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22788 event pairs, 408 based on Foata normal form. 8/4191 useless extension candidates. Maximal degree in co-relation 39793. Up to 3817 conditions per place. [2024-06-14 13:12:40,054 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 368 selfloop transitions, 37 changer transitions 0/409 dead transitions. [2024-06-14 13:12:40,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 409 transitions, 6145 flow [2024-06-14 13:12:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:12:40,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:12:40,055 INFO L175 Difference]: Start difference. First operand has 311 places, 379 transitions, 4961 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:12:40,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 409 transitions, 6145 flow [2024-06-14 13:12:41,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 409 transitions, 6030 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:12:41,179 INFO L231 Difference]: Finished difference. Result has 311 places, 380 transitions, 4949 flow [2024-06-14 13:12:41,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4848, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4949, PETRI_PLACES=311, PETRI_TRANSITIONS=380} [2024-06-14 13:12:41,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 13:12:41,180 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 380 transitions, 4949 flow [2024-06-14 13:12:41,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:41,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:41,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:41,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:12:41,180 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:41,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1209475443, now seen corresponding path program 2 times [2024-06-14 13:12:41,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:41,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103800038] [2024-06-14 13:12:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:41,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:43,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:43,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103800038] [2024-06-14 13:12:43,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103800038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:43,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:43,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:43,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613877051] [2024-06-14 13:12:43,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:43,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:43,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:43,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:43,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:43,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 380 transitions, 4949 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:43,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:43,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:43,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:45,454 INFO L124 PetriNetUnfolderBase]: 2666/4157 cut-off events. [2024-06-14 13:12:45,454 INFO L125 PetriNetUnfolderBase]: For 553027/553027 co-relation queries the response was YES. [2024-06-14 13:12:45,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39194 conditions, 4157 events. 2666/4157 cut-off events. For 553027/553027 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 22680 event pairs, 524 based on Foata normal form. 8/4165 useless extension candidates. Maximal degree in co-relation 39041. Up to 3921 conditions per place. [2024-06-14 13:12:45,502 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 367 selfloop transitions, 32 changer transitions 0/403 dead transitions. [2024-06-14 13:12:45,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 403 transitions, 5915 flow [2024-06-14 13:12:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:12:45,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:12:45,503 INFO L175 Difference]: Start difference. First operand has 311 places, 380 transitions, 4949 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:12:45,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 403 transitions, 5915 flow [2024-06-14 13:12:46,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 403 transitions, 5839 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:46,665 INFO L231 Difference]: Finished difference. Result has 314 places, 380 transitions, 4941 flow [2024-06-14 13:12:46,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4873, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4941, PETRI_PLACES=314, PETRI_TRANSITIONS=380} [2024-06-14 13:12:46,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 13:12:46,665 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 380 transitions, 4941 flow [2024-06-14 13:12:46,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:46,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:46,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:46,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:12:46,666 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:46,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:46,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1915092275, now seen corresponding path program 1 times [2024-06-14 13:12:46,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:46,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067118520] [2024-06-14 13:12:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:46,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:49,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:49,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067118520] [2024-06-14 13:12:49,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067118520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:49,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:49,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:49,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189657129] [2024-06-14 13:12:49,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:49,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:49,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:49,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:49,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 380 transitions, 4941 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:49,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:49,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:49,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:50,689 INFO L124 PetriNetUnfolderBase]: 2671/4166 cut-off events. [2024-06-14 13:12:50,689 INFO L125 PetriNetUnfolderBase]: For 540240/540240 co-relation queries the response was YES. [2024-06-14 13:12:50,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39268 conditions, 4166 events. 2671/4166 cut-off events. For 540240/540240 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22729 event pairs, 547 based on Foata normal form. 1/4167 useless extension candidates. Maximal degree in co-relation 39114. Up to 3963 conditions per place. [2024-06-14 13:12:50,745 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 364 selfloop transitions, 35 changer transitions 0/403 dead transitions. [2024-06-14 13:12:50,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 403 transitions, 5888 flow [2024-06-14 13:12:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:12:50,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 13:12:50,746 INFO L175 Difference]: Start difference. First operand has 314 places, 380 transitions, 4941 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:12:50,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 403 transitions, 5888 flow [2024-06-14 13:12:51,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 403 transitions, 5799 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:12:51,927 INFO L231 Difference]: Finished difference. Result has 314 places, 383 transitions, 5033 flow [2024-06-14 13:12:51,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4852, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5033, PETRI_PLACES=314, PETRI_TRANSITIONS=383} [2024-06-14 13:12:51,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 13:12:51,928 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 383 transitions, 5033 flow [2024-06-14 13:12:51,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:51,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:51,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:12:51,928 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:51,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash 662225547, now seen corresponding path program 2 times [2024-06-14 13:12:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:51,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141188255] [2024-06-14 13:12:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:54,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141188255] [2024-06-14 13:12:54,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141188255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:54,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:54,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:54,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015024511] [2024-06-14 13:12:54,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:54,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:54,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:54,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:54,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 383 transitions, 5033 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:54,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:54,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:54,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:55,854 INFO L124 PetriNetUnfolderBase]: 2676/4173 cut-off events. [2024-06-14 13:12:55,854 INFO L125 PetriNetUnfolderBase]: For 552626/552626 co-relation queries the response was YES. [2024-06-14 13:12:55,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39669 conditions, 4173 events. 2676/4173 cut-off events. For 552626/552626 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 22777 event pairs, 551 based on Foata normal form. 1/4174 useless extension candidates. Maximal degree in co-relation 39514. Up to 3980 conditions per place. [2024-06-14 13:12:55,908 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 349 selfloop transitions, 48 changer transitions 0/401 dead transitions. [2024-06-14 13:12:55,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 401 transitions, 5954 flow [2024-06-14 13:12:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:12:55,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 13:12:55,909 INFO L175 Difference]: Start difference. First operand has 314 places, 383 transitions, 5033 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:12:55,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 401 transitions, 5954 flow [2024-06-14 13:12:57,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 401 transitions, 5815 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:57,253 INFO L231 Difference]: Finished difference. Result has 316 places, 386 transitions, 5099 flow [2024-06-14 13:12:57,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5099, PETRI_PLACES=316, PETRI_TRANSITIONS=386} [2024-06-14 13:12:57,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-14 13:12:57,253 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 386 transitions, 5099 flow [2024-06-14 13:12:57,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:57,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:57,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:57,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:12:57,254 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:57,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:57,254 INFO L85 PathProgramCache]: Analyzing trace with hash 662225733, now seen corresponding path program 1 times [2024-06-14 13:12:57,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:57,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272940810] [2024-06-14 13:12:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:57,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272940810] [2024-06-14 13:12:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272940810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:59,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:59,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630323350] [2024-06-14 13:12:59,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:59,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:59,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:59,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:59,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:12:59,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 386 transitions, 5099 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:59,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:59,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:12:59,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:01,784 INFO L124 PetriNetUnfolderBase]: 2745/4268 cut-off events. [2024-06-14 13:13:01,784 INFO L125 PetriNetUnfolderBase]: For 578713/578713 co-relation queries the response was YES. [2024-06-14 13:13:01,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40909 conditions, 4268 events. 2745/4268 cut-off events. For 578713/578713 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23278 event pairs, 542 based on Foata normal form. 2/4270 useless extension candidates. Maximal degree in co-relation 40753. Up to 4018 conditions per place. [2024-06-14 13:13:01,841 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 346 selfloop transitions, 77 changer transitions 0/427 dead transitions. [2024-06-14 13:13:01,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 427 transitions, 6591 flow [2024-06-14 13:13:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:13:01,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 13:13:01,842 INFO L175 Difference]: Start difference. First operand has 316 places, 386 transitions, 5099 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:13:01,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 427 transitions, 6591 flow [2024-06-14 13:13:03,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 427 transitions, 6440 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:03,238 INFO L231 Difference]: Finished difference. Result has 321 places, 406 transitions, 5597 flow [2024-06-14 13:13:03,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4965, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5597, PETRI_PLACES=321, PETRI_TRANSITIONS=406} [2024-06-14 13:13:03,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 13:13:03,239 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 406 transitions, 5597 flow [2024-06-14 13:13:03,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:03,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:03,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:03,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:13:03,239 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:03,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:03,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1209146037, now seen corresponding path program 2 times [2024-06-14 13:13:03,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:03,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361914224] [2024-06-14 13:13:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:05,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:05,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361914224] [2024-06-14 13:13:05,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361914224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:05,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:05,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:05,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205700534] [2024-06-14 13:13:05,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:05,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:05,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:05,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:05,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:05,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:13:05,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 406 transitions, 5597 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:05,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:05,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:13:05,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:08,401 INFO L124 PetriNetUnfolderBase]: 2755/4282 cut-off events. [2024-06-14 13:13:08,402 INFO L125 PetriNetUnfolderBase]: For 594675/594675 co-relation queries the response was YES. [2024-06-14 13:13:08,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41728 conditions, 4282 events. 2755/4282 cut-off events. For 594675/594675 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 23377 event pairs, 540 based on Foata normal form. 2/4284 useless extension candidates. Maximal degree in co-relation 41569. Up to 4028 conditions per place. [2024-06-14 13:13:08,464 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 342 selfloop transitions, 86 changer transitions 0/432 dead transitions. [2024-06-14 13:13:08,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 432 transitions, 6807 flow [2024-06-14 13:13:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:13:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:13:08,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-14 13:13:08,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-14 13:13:08,466 INFO L175 Difference]: Start difference. First operand has 321 places, 406 transitions, 5597 flow. Second operand 10 states and 157 transitions. [2024-06-14 13:13:08,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 432 transitions, 6807 flow [2024-06-14 13:13:10,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 432 transitions, 6707 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:10,073 INFO L231 Difference]: Finished difference. Result has 328 places, 410 transitions, 5818 flow [2024-06-14 13:13:10,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5497, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5818, PETRI_PLACES=328, PETRI_TRANSITIONS=410} [2024-06-14 13:13:10,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-14 13:13:10,074 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 410 transitions, 5818 flow [2024-06-14 13:13:10,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:10,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:10,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:10,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:13:10,074 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:10,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:10,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2088181243, now seen corresponding path program 3 times [2024-06-14 13:13:10,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:10,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569516575] [2024-06-14 13:13:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:10,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:12,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:12,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569516575] [2024-06-14 13:13:12,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569516575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:12,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:12,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120160957] [2024-06-14 13:13:12,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:12,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:12,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:12,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:13:12,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 410 transitions, 5818 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:12,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:12,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:13:12,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:14,548 INFO L124 PetriNetUnfolderBase]: 2760/4291 cut-off events. [2024-06-14 13:13:14,548 INFO L125 PetriNetUnfolderBase]: For 604834/604834 co-relation queries the response was YES. [2024-06-14 13:13:14,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42181 conditions, 4291 events. 2760/4291 cut-off events. For 604834/604834 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23441 event pairs, 548 based on Foata normal form. 1/4292 useless extension candidates. Maximal degree in co-relation 42019. Up to 4087 conditions per place. [2024-06-14 13:13:14,603 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 366 selfloop transitions, 60 changer transitions 0/430 dead transitions. [2024-06-14 13:13:14,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 430 transitions, 6807 flow [2024-06-14 13:13:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:13:14,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-14 13:13:14,604 INFO L175 Difference]: Start difference. First operand has 328 places, 410 transitions, 5818 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:13:14,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 430 transitions, 6807 flow [2024-06-14 13:13:16,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 430 transitions, 6627 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:16,552 INFO L231 Difference]: Finished difference. Result has 330 places, 413 transitions, 5874 flow [2024-06-14 13:13:16,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5874, PETRI_PLACES=330, PETRI_TRANSITIONS=413} [2024-06-14 13:13:16,552 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-14 13:13:16,552 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 413 transitions, 5874 flow [2024-06-14 13:13:16,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:16,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:16,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:16,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:13:16,553 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:16,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2088181429, now seen corresponding path program 3 times [2024-06-14 13:13:16,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:16,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025307829] [2024-06-14 13:13:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:16,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:18,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:18,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025307829] [2024-06-14 13:13:18,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025307829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:18,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:18,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753162370] [2024-06-14 13:13:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:18,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:18,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:18,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:19,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:13:19,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 413 transitions, 5874 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:19,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:19,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:13:19,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:21,493 INFO L124 PetriNetUnfolderBase]: 2754/4281 cut-off events. [2024-06-14 13:13:21,493 INFO L125 PetriNetUnfolderBase]: For 599982/599982 co-relation queries the response was YES. [2024-06-14 13:13:21,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41841 conditions, 4281 events. 2754/4281 cut-off events. For 599982/599982 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23317 event pairs, 539 based on Foata normal form. 2/4283 useless extension candidates. Maximal degree in co-relation 41679. Up to 4030 conditions per place. [2024-06-14 13:13:21,557 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 348 selfloop transitions, 83 changer transitions 0/435 dead transitions. [2024-06-14 13:13:21,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 435 transitions, 6814 flow [2024-06-14 13:13:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:13:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:13:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-14 13:13:21,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697674418604651 [2024-06-14 13:13:21,558 INFO L175 Difference]: Start difference. First operand has 330 places, 413 transitions, 5874 flow. Second operand 10 states and 159 transitions. [2024-06-14 13:13:21,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 435 transitions, 6814 flow [2024-06-14 13:13:23,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 435 transitions, 6615 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:23,414 INFO L231 Difference]: Finished difference. Result has 333 places, 413 transitions, 5857 flow [2024-06-14 13:13:23,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5857, PETRI_PLACES=333, PETRI_TRANSITIONS=413} [2024-06-14 13:13:23,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 13:13:23,415 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 413 transitions, 5857 flow [2024-06-14 13:13:23,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:23,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:23,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:23,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:13:23,416 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:23,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1406392185, now seen corresponding path program 4 times [2024-06-14 13:13:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:23,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994442069] [2024-06-14 13:13:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:23,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:26,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:26,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994442069] [2024-06-14 13:13:26,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994442069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:26,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:26,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:26,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345054930] [2024-06-14 13:13:26,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:26,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:26,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:26,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:13:26,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 413 transitions, 5857 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:26,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:26,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:13:26,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:27,858 INFO L124 PetriNetUnfolderBase]: 2759/4290 cut-off events. [2024-06-14 13:13:27,858 INFO L125 PetriNetUnfolderBase]: For 608513/608513 co-relation queries the response was YES. [2024-06-14 13:13:27,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42081 conditions, 4290 events. 2759/4290 cut-off events. For 608513/608513 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23411 event pairs, 547 based on Foata normal form. 1/4291 useless extension candidates. Maximal degree in co-relation 41918. Up to 4108 conditions per place. [2024-06-14 13:13:27,922 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 407 selfloop transitions, 29 changer transitions 0/440 dead transitions. [2024-06-14 13:13:27,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 440 transitions, 6895 flow [2024-06-14 13:13:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:13:27,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:13:27,925 INFO L175 Difference]: Start difference. First operand has 333 places, 413 transitions, 5857 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:13:27,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 440 transitions, 6895 flow [2024-06-14 13:13:29,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 440 transitions, 6695 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:13:29,602 INFO L231 Difference]: Finished difference. Result has 332 places, 416 transitions, 5827 flow [2024-06-14 13:13:29,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5657, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5827, PETRI_PLACES=332, PETRI_TRANSITIONS=416} [2024-06-14 13:13:29,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 13:13:29,602 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 416 transitions, 5827 flow [2024-06-14 13:13:29,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:29,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:29,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:29,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:13:29,603 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:29,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:29,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1411754565, now seen corresponding path program 5 times [2024-06-14 13:13:29,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:29,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848197582] [2024-06-14 13:13:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:29,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:32,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:32,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848197582] [2024-06-14 13:13:32,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848197582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:32,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:32,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:32,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113569236] [2024-06-14 13:13:32,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:32,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:32,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:32,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:32,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:32,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:13:32,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 416 transitions, 5827 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:32,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:32,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:13:32,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:34,020 INFO L124 PetriNetUnfolderBase]: 2772/4312 cut-off events. [2024-06-14 13:13:34,020 INFO L125 PetriNetUnfolderBase]: For 627652/627652 co-relation queries the response was YES. [2024-06-14 13:13:34,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42719 conditions, 4312 events. 2772/4312 cut-off events. For 627652/627652 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23586 event pairs, 544 based on Foata normal form. 1/4313 useless extension candidates. Maximal degree in co-relation 42555. Up to 3959 conditions per place. [2024-06-14 13:13:34,082 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 350 selfloop transitions, 98 changer transitions 0/452 dead transitions. [2024-06-14 13:13:34,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 452 transitions, 7503 flow [2024-06-14 13:13:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:13:34,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:13:34,083 INFO L175 Difference]: Start difference. First operand has 332 places, 416 transitions, 5827 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:13:34,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 452 transitions, 7503 flow [2024-06-14 13:13:35,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 452 transitions, 7355 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:35,867 INFO L231 Difference]: Finished difference. Result has 336 places, 426 transitions, 6311 flow [2024-06-14 13:13:35,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5679, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6311, PETRI_PLACES=336, PETRI_TRANSITIONS=426} [2024-06-14 13:13:35,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-14 13:13:35,868 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 426 transitions, 6311 flow [2024-06-14 13:13:35,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:35,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:35,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:35,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:13:35,868 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:35,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:35,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1406512155, now seen corresponding path program 6 times [2024-06-14 13:13:35,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:35,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279301974] [2024-06-14 13:13:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:35,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:38,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:38,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279301974] [2024-06-14 13:13:38,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279301974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:38,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:38,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:38,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365390905] [2024-06-14 13:13:38,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:38,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:38,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:38,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:13:38,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 426 transitions, 6311 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:38,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:38,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:13:38,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:39,907 INFO L124 PetriNetUnfolderBase]: 2777/4319 cut-off events. [2024-06-14 13:13:39,907 INFO L125 PetriNetUnfolderBase]: For 645516/645516 co-relation queries the response was YES. [2024-06-14 13:13:39,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43567 conditions, 4319 events. 2777/4319 cut-off events. For 645516/645516 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23632 event pairs, 544 based on Foata normal form. 1/4320 useless extension candidates. Maximal degree in co-relation 43400. Up to 4092 conditions per place. [2024-06-14 13:13:39,969 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 388 selfloop transitions, 57 changer transitions 0/449 dead transitions. [2024-06-14 13:13:39,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 449 transitions, 7363 flow [2024-06-14 13:13:39,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:39,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:13:39,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:13:39,970 INFO L175 Difference]: Start difference. First operand has 336 places, 426 transitions, 6311 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:13:39,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 449 transitions, 7363 flow [2024-06-14 13:13:41,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 449 transitions, 7177 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:41,631 INFO L231 Difference]: Finished difference. Result has 341 places, 429 transitions, 6359 flow [2024-06-14 13:13:41,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6125, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6359, PETRI_PLACES=341, PETRI_TRANSITIONS=429} [2024-06-14 13:13:41,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-14 13:13:41,631 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 429 transitions, 6359 flow [2024-06-14 13:13:41,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:41,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:41,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:41,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:13:41,632 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:41,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1224171493, now seen corresponding path program 1 times [2024-06-14 13:13:41,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:41,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208597280] [2024-06-14 13:13:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:41,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208597280] [2024-06-14 13:13:44,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208597280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:44,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:44,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:44,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882518032] [2024-06-14 13:13:44,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:44,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:44,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:44,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:44,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:13:44,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 429 transitions, 6359 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:44,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:44,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:13:44,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:46,354 INFO L124 PetriNetUnfolderBase]: 2792/4353 cut-off events. [2024-06-14 13:13:46,354 INFO L125 PetriNetUnfolderBase]: For 663218/663218 co-relation queries the response was YES. [2024-06-14 13:13:46,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43955 conditions, 4353 events. 2792/4353 cut-off events. For 663218/663218 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24088 event pairs, 876 based on Foata normal form. 2/4355 useless extension candidates. Maximal degree in co-relation 43786. Up to 4169 conditions per place. [2024-06-14 13:13:46,418 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 423 selfloop transitions, 32 changer transitions 0/459 dead transitions. [2024-06-14 13:13:46,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 459 transitions, 7466 flow [2024-06-14 13:13:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:46,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:13:46,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 13:13:46,420 INFO L175 Difference]: Start difference. First operand has 341 places, 429 transitions, 6359 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:13:46,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 459 transitions, 7466 flow [2024-06-14 13:13:48,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 459 transitions, 7282 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:48,353 INFO L231 Difference]: Finished difference. Result has 344 places, 438 transitions, 6408 flow [2024-06-14 13:13:48,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6175, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6408, PETRI_PLACES=344, PETRI_TRANSITIONS=438} [2024-06-14 13:13:48,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-14 13:13:48,354 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 438 transitions, 6408 flow [2024-06-14 13:13:48,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:48,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:48,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:48,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:13:48,354 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:48,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:48,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1412053095, now seen corresponding path program 7 times [2024-06-14 13:13:48,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:48,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524710628] [2024-06-14 13:13:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:48,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:51,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:51,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524710628] [2024-06-14 13:13:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524710628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:51,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:51,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:51,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081274592] [2024-06-14 13:13:51,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:51,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:51,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:51,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:51,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:51,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:13:51,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 438 transitions, 6408 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:51,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:51,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:13:51,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:53,305 INFO L124 PetriNetUnfolderBase]: 2789/4336 cut-off events. [2024-06-14 13:13:53,305 INFO L125 PetriNetUnfolderBase]: For 665988/665988 co-relation queries the response was YES. [2024-06-14 13:13:53,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44066 conditions, 4336 events. 2789/4336 cut-off events. For 665988/665988 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 23721 event pairs, 540 based on Foata normal form. 1/4337 useless extension candidates. Maximal degree in co-relation 43895. Up to 4061 conditions per place. [2024-06-14 13:13:53,368 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 402 selfloop transitions, 55 changer transitions 0/461 dead transitions. [2024-06-14 13:13:53,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 461 transitions, 7490 flow [2024-06-14 13:13:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:13:53,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:13:53,369 INFO L175 Difference]: Start difference. First operand has 344 places, 438 transitions, 6408 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:13:53,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 461 transitions, 7490 flow [2024-06-14 13:13:55,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 461 transitions, 7367 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:55,318 INFO L231 Difference]: Finished difference. Result has 348 places, 441 transitions, 6522 flow [2024-06-14 13:13:55,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6285, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6522, PETRI_PLACES=348, PETRI_TRANSITIONS=441} [2024-06-14 13:13:55,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-14 13:13:55,319 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 441 transitions, 6522 flow [2024-06-14 13:13:55,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:55,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:55,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:55,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:13:55,319 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:55,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:55,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1406512341, now seen corresponding path program 4 times [2024-06-14 13:13:55,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:55,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131747064] [2024-06-14 13:13:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:55,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:57,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:57,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131747064] [2024-06-14 13:13:57,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131747064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:57,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:57,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:57,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415366592] [2024-06-14 13:13:57,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:57,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:57,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:57,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:57,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:57,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:13:57,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 441 transitions, 6522 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:57,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:57,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:13:57,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:00,290 INFO L124 PetriNetUnfolderBase]: 2815/4378 cut-off events. [2024-06-14 13:14:00,291 INFO L125 PetriNetUnfolderBase]: For 695406/695406 co-relation queries the response was YES. [2024-06-14 13:14:00,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44986 conditions, 4378 events. 2815/4378 cut-off events. For 695406/695406 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24038 event pairs, 543 based on Foata normal form. 2/4380 useless extension candidates. Maximal degree in co-relation 44814. Up to 4017 conditions per place. [2024-06-14 13:14:00,360 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 362 selfloop transitions, 109 changer transitions 0/475 dead transitions. [2024-06-14 13:14:00,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 475 transitions, 7940 flow [2024-06-14 13:14:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:14:00,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:14:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-14 13:14:00,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3594080338266385 [2024-06-14 13:14:00,361 INFO L175 Difference]: Start difference. First operand has 348 places, 441 transitions, 6522 flow. Second operand 11 states and 170 transitions. [2024-06-14 13:14:00,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 475 transitions, 7940 flow [2024-06-14 13:14:02,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 475 transitions, 7727 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:02,578 INFO L231 Difference]: Finished difference. Result has 353 places, 447 transitions, 6731 flow [2024-06-14 13:14:02,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6731, PETRI_PLACES=353, PETRI_TRANSITIONS=447} [2024-06-14 13:14:02,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-14 13:14:02,579 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 447 transitions, 6731 flow [2024-06-14 13:14:02,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:02,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:02,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:02,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:14:02,579 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:02,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:02,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1227895957, now seen corresponding path program 5 times [2024-06-14 13:14:02,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:02,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142848823] [2024-06-14 13:14:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:02,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:05,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:05,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142848823] [2024-06-14 13:14:05,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142848823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:05,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:05,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:05,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720072791] [2024-06-14 13:14:05,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:05,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:05,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:05,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:14:05,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 447 transitions, 6731 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:05,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:05,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:14:05,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:07,657 INFO L124 PetriNetUnfolderBase]: 2841/4418 cut-off events. [2024-06-14 13:14:07,657 INFO L125 PetriNetUnfolderBase]: For 723796/723796 co-relation queries the response was YES. [2024-06-14 13:14:07,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46114 conditions, 4418 events. 2841/4418 cut-off events. For 723796/723796 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24295 event pairs, 538 based on Foata normal form. 2/4420 useless extension candidates. Maximal degree in co-relation 45941. Up to 4042 conditions per place. [2024-06-14 13:14:07,722 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 363 selfloop transitions, 110 changer transitions 0/477 dead transitions. [2024-06-14 13:14:07,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 477 transitions, 8347 flow [2024-06-14 13:14:07,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:14:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:14:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-14 13:14:07,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697674418604651 [2024-06-14 13:14:07,723 INFO L175 Difference]: Start difference. First operand has 353 places, 447 transitions, 6731 flow. Second operand 10 states and 159 transitions. [2024-06-14 13:14:07,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 477 transitions, 8347 flow [2024-06-14 13:14:10,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 477 transitions, 7963 flow, removed 96 selfloop flow, removed 8 redundant places. [2024-06-14 13:14:10,069 INFO L231 Difference]: Finished difference. Result has 355 places, 453 transitions, 6778 flow [2024-06-14 13:14:10,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6419, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6778, PETRI_PLACES=355, PETRI_TRANSITIONS=453} [2024-06-14 13:14:10,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-14 13:14:10,070 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 453 transitions, 6778 flow [2024-06-14 13:14:10,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:10,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:10,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:10,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:14:10,070 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:10,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1415772165, now seen corresponding path program 8 times [2024-06-14 13:14:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:10,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984724313] [2024-06-14 13:14:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:10,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:12,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:12,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984724313] [2024-06-14 13:14:12,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984724313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:12,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:12,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503840383] [2024-06-14 13:14:12,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:12,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:12,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:12,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:12,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:14:12,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 453 transitions, 6778 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:12,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:12,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:14:12,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:14,169 INFO L124 PetriNetUnfolderBase]: 2846/4427 cut-off events. [2024-06-14 13:14:14,170 INFO L125 PetriNetUnfolderBase]: For 727146/727146 co-relation queries the response was YES. [2024-06-14 13:14:14,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45844 conditions, 4427 events. 2846/4427 cut-off events. For 727146/727146 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 24319 event pairs, 551 based on Foata normal form. 1/4428 useless extension candidates. Maximal degree in co-relation 45670. Up to 4165 conditions per place. [2024-06-14 13:14:14,238 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 72 changer transitions 0/473 dead transitions. [2024-06-14 13:14:14,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 473 transitions, 8068 flow [2024-06-14 13:14:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:14:14,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:14:14,239 INFO L175 Difference]: Start difference. First operand has 355 places, 453 transitions, 6778 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:14:14,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 473 transitions, 8068 flow [2024-06-14 13:14:16,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 473 transitions, 7871 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:16,685 INFO L231 Difference]: Finished difference. Result has 358 places, 456 transitions, 6875 flow [2024-06-14 13:14:16,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6875, PETRI_PLACES=358, PETRI_TRANSITIONS=456} [2024-06-14 13:14:16,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-14 13:14:16,685 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 456 transitions, 6875 flow [2024-06-14 13:14:16,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:16,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:16,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:16,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:14:16,686 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:16,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1227896143, now seen corresponding path program 2 times [2024-06-14 13:14:16,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:16,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741674365] [2024-06-14 13:14:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:16,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:19,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:19,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741674365] [2024-06-14 13:14:19,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741674365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:19,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:19,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984794697] [2024-06-14 13:14:19,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:19,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:14:19,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 456 transitions, 6875 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:19,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:19,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:14:19,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:21,447 INFO L124 PetriNetUnfolderBase]: 2861/4457 cut-off events. [2024-06-14 13:14:21,447 INFO L125 PetriNetUnfolderBase]: For 752537/752537 co-relation queries the response was YES. [2024-06-14 13:14:21,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46195 conditions, 4457 events. 2861/4457 cut-off events. For 752537/752537 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24715 event pairs, 881 based on Foata normal form. 3/4460 useless extension candidates. Maximal degree in co-relation 46019. Up to 4197 conditions per place. [2024-06-14 13:14:21,517 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 393 selfloop transitions, 87 changer transitions 0/484 dead transitions. [2024-06-14 13:14:21,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 484 transitions, 8107 flow [2024-06-14 13:14:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:14:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:14:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-14 13:14:21,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35348837209302325 [2024-06-14 13:14:21,518 INFO L175 Difference]: Start difference. First operand has 358 places, 456 transitions, 6875 flow. Second operand 10 states and 152 transitions. [2024-06-14 13:14:21,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 484 transitions, 8107 flow [2024-06-14 13:14:23,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 484 transitions, 7929 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:23,925 INFO L231 Difference]: Finished difference. Result has 363 places, 462 transitions, 7097 flow [2024-06-14 13:14:23,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6697, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7097, PETRI_PLACES=363, PETRI_TRANSITIONS=462} [2024-06-14 13:14:23,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 13:14:23,926 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 462 transitions, 7097 flow [2024-06-14 13:14:23,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:23,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:23,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:23,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:14:23,926 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:23,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1415766585, now seen corresponding path program 9 times [2024-06-14 13:14:23,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:23,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878427625] [2024-06-14 13:14:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:23,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:26,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:26,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878427625] [2024-06-14 13:14:26,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878427625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:26,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:26,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:26,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811916452] [2024-06-14 13:14:26,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:26,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:26,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:26,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:26,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:26,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:14:26,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 462 transitions, 7097 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:26,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:26,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:14:26,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:28,235 INFO L124 PetriNetUnfolderBase]: 2858/4440 cut-off events. [2024-06-14 13:14:28,236 INFO L125 PetriNetUnfolderBase]: For 752271/752271 co-relation queries the response was YES. [2024-06-14 13:14:28,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46474 conditions, 4440 events. 2858/4440 cut-off events. For 752271/752271 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24401 event pairs, 549 based on Foata normal form. 1/4441 useless extension candidates. Maximal degree in co-relation 46297. Up to 4205 conditions per place. [2024-06-14 13:14:28,302 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 417 selfloop transitions, 57 changer transitions 0/478 dead transitions. [2024-06-14 13:14:28,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 478 transitions, 8087 flow [2024-06-14 13:14:28,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:14:28,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 13:14:28,304 INFO L175 Difference]: Start difference. First operand has 363 places, 462 transitions, 7097 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:14:28,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 478 transitions, 8087 flow [2024-06-14 13:14:30,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 478 transitions, 7727 flow, removed 97 selfloop flow, removed 9 redundant places. [2024-06-14 13:14:30,796 INFO L231 Difference]: Finished difference. Result has 362 places, 462 transitions, 6857 flow [2024-06-14 13:14:30,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6737, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6857, PETRI_PLACES=362, PETRI_TRANSITIONS=462} [2024-06-14 13:14:30,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 13:14:30,796 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 462 transitions, 6857 flow [2024-06-14 13:14:30,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:30,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:30,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:30,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:14:30,797 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:30,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:30,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1415766771, now seen corresponding path program 6 times [2024-06-14 13:14:30,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:30,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194094004] [2024-06-14 13:14:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:30,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:33,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194094004] [2024-06-14 13:14:33,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194094004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:33,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:33,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501985558] [2024-06-14 13:14:33,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:33,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:33,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:33,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:33,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:33,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:14:33,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 462 transitions, 6857 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:33,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:33,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:14:33,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:36,196 INFO L124 PetriNetUnfolderBase]: 2852/4430 cut-off events. [2024-06-14 13:14:36,196 INFO L125 PetriNetUnfolderBase]: For 744762/744762 co-relation queries the response was YES. [2024-06-14 13:14:36,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45893 conditions, 4430 events. 2852/4430 cut-off events. For 744762/744762 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 24288 event pairs, 538 based on Foata normal form. 2/4432 useless extension candidates. Maximal degree in co-relation 45716. Up to 4061 conditions per place. [2024-06-14 13:14:36,257 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 372 selfloop transitions, 112 changer transitions 0/488 dead transitions. [2024-06-14 13:14:36,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 488 transitions, 8115 flow [2024-06-14 13:14:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:14:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:14:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 181 transitions. [2024-06-14 13:14:36,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507751937984496 [2024-06-14 13:14:36,259 INFO L175 Difference]: Start difference. First operand has 362 places, 462 transitions, 6857 flow. Second operand 12 states and 181 transitions. [2024-06-14 13:14:36,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 488 transitions, 8115 flow [2024-06-14 13:14:38,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 488 transitions, 7918 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:38,615 INFO L231 Difference]: Finished difference. Result has 367 places, 462 transitions, 6890 flow [2024-06-14 13:14:38,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6660, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6890, PETRI_PLACES=367, PETRI_TRANSITIONS=462} [2024-06-14 13:14:38,615 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-14 13:14:38,615 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 462 transitions, 6890 flow [2024-06-14 13:14:38,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:38,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:38,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:38,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:14:38,616 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:38,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:38,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1415772537, now seen corresponding path program 3 times [2024-06-14 13:14:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:38,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361247152] [2024-06-14 13:14:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:38,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:41,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:41,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361247152] [2024-06-14 13:14:41,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361247152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:41,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:41,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:41,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460756050] [2024-06-14 13:14:41,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:41,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:41,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:41,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:41,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:14:41,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 462 transitions, 6890 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:41,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:41,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:14:41,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:43,508 INFO L124 PetriNetUnfolderBase]: 2862/4455 cut-off events. [2024-06-14 13:14:43,508 INFO L125 PetriNetUnfolderBase]: For 760639/760639 co-relation queries the response was YES. [2024-06-14 13:14:43,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46312 conditions, 4455 events. 2862/4455 cut-off events. For 760639/760639 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24678 event pairs, 881 based on Foata normal form. 2/4457 useless extension candidates. Maximal degree in co-relation 46134. Up to 4179 conditions per place. [2024-06-14 13:14:43,568 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 384 selfloop transitions, 103 changer transitions 0/491 dead transitions. [2024-06-14 13:14:43,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 491 transitions, 8120 flow [2024-06-14 13:14:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:14:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:14:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-14 13:14:43,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35095137420718814 [2024-06-14 13:14:43,570 INFO L175 Difference]: Start difference. First operand has 367 places, 462 transitions, 6890 flow. Second operand 11 states and 166 transitions. [2024-06-14 13:14:43,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 491 transitions, 8120 flow [2024-06-14 13:14:45,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 491 transitions, 7874 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:14:45,940 INFO L231 Difference]: Finished difference. Result has 367 places, 467 transitions, 7042 flow [2024-06-14 13:14:45,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6644, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7042, PETRI_PLACES=367, PETRI_TRANSITIONS=467} [2024-06-14 13:14:45,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-14 13:14:45,940 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 467 transitions, 7042 flow [2024-06-14 13:14:45,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:45,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:45,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:45,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:14:45,941 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:45,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:45,941 INFO L85 PathProgramCache]: Analyzing trace with hash -957411481, now seen corresponding path program 10 times [2024-06-14 13:14:45,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:45,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565913190] [2024-06-14 13:14:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:45,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:48,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:48,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565913190] [2024-06-14 13:14:48,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565913190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:48,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:48,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:48,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076204825] [2024-06-14 13:14:48,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:48,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:48,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:48,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:48,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:48,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:14:48,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 467 transitions, 7042 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:48,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:48,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:14:48,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:50,094 INFO L124 PetriNetUnfolderBase]: 2859/4449 cut-off events. [2024-06-14 13:14:50,094 INFO L125 PetriNetUnfolderBase]: For 764307/764344 co-relation queries the response was YES. [2024-06-14 13:14:50,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46461 conditions, 4449 events. 2859/4449 cut-off events. For 764307/764344 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 24507 event pairs, 572 based on Foata normal form. 26/4475 useless extension candidates. Maximal degree in co-relation 46282. Up to 4187 conditions per place. [2024-06-14 13:14:50,164 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 407 selfloop transitions, 69 changer transitions 0/480 dead transitions. [2024-06-14 13:14:50,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 480 transitions, 8228 flow [2024-06-14 13:14:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 13:14:50,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 13:14:50,166 INFO L175 Difference]: Start difference. First operand has 367 places, 467 transitions, 7042 flow. Second operand 8 states and 124 transitions. [2024-06-14 13:14:50,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 480 transitions, 8228 flow [2024-06-14 13:14:52,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 480 transitions, 7859 flow, removed 98 selfloop flow, removed 9 redundant places. [2024-06-14 13:14:52,952 INFO L231 Difference]: Finished difference. Result has 366 places, 467 transitions, 6820 flow [2024-06-14 13:14:52,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6675, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6820, PETRI_PLACES=366, PETRI_TRANSITIONS=467} [2024-06-14 13:14:52,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-14 13:14:52,952 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 467 transitions, 6820 flow [2024-06-14 13:14:52,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:52,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:52,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:52,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:14:52,953 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:52,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:52,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1812117723, now seen corresponding path program 7 times [2024-06-14 13:14:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:52,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220188988] [2024-06-14 13:14:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:55,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:55,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220188988] [2024-06-14 13:14:55,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220188988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:55,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:55,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:55,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883378833] [2024-06-14 13:14:55,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:55,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:55,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:55,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:55,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:14:55,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 467 transitions, 6820 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:55,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:55,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:14:55,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:58,277 INFO L124 PetriNetUnfolderBase]: 2885/4487 cut-off events. [2024-06-14 13:14:58,277 INFO L125 PetriNetUnfolderBase]: For 778891/778928 co-relation queries the response was YES. [2024-06-14 13:14:58,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46737 conditions, 4487 events. 2885/4487 cut-off events. For 778891/778928 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24782 event pairs, 562 based on Foata normal form. 27/4514 useless extension candidates. Maximal degree in co-relation 46558. Up to 4096 conditions per place. [2024-06-14 13:14:58,350 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 373 selfloop transitions, 116 changer transitions 0/493 dead transitions. [2024-06-14 13:14:58,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 493 transitions, 8410 flow [2024-06-14 13:14:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:14:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:14:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 13:14:58,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-14 13:14:58,351 INFO L175 Difference]: Start difference. First operand has 366 places, 467 transitions, 6820 flow. Second operand 10 states and 156 transitions. [2024-06-14 13:14:58,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 493 transitions, 8410 flow [2024-06-14 13:15:00,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 493 transitions, 8171 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:00,846 INFO L231 Difference]: Finished difference. Result has 368 places, 473 transitions, 6958 flow [2024-06-14 13:15:00,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6958, PETRI_PLACES=368, PETRI_TRANSITIONS=473} [2024-06-14 13:15:00,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-14 13:15:00,847 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 473 transitions, 6958 flow [2024-06-14 13:15:00,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:00,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:00,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:00,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:15:00,847 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:00,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1683084935, now seen corresponding path program 4 times [2024-06-14 13:15:00,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:00,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499091937] [2024-06-14 13:15:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:00,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:03,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:03,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499091937] [2024-06-14 13:15:03,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499091937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:03,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:03,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488803948] [2024-06-14 13:15:03,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:03,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:03,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:15:03,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 473 transitions, 6958 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:03,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:03,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:15:03,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:05,457 INFO L124 PetriNetUnfolderBase]: 2903/4521 cut-off events. [2024-06-14 13:15:05,458 INFO L125 PetriNetUnfolderBase]: For 802208/802245 co-relation queries the response was YES. [2024-06-14 13:15:05,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47451 conditions, 4521 events. 2903/4521 cut-off events. For 802208/802245 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25143 event pairs, 902 based on Foata normal form. 27/4548 useless extension candidates. Maximal degree in co-relation 47272. Up to 4267 conditions per place. [2024-06-14 13:15:05,520 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 420 selfloop transitions, 91 changer transitions 0/515 dead transitions. [2024-06-14 13:15:05,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 515 transitions, 8842 flow [2024-06-14 13:15:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-14 13:15:05,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34651162790697676 [2024-06-14 13:15:05,521 INFO L175 Difference]: Start difference. First operand has 368 places, 473 transitions, 6958 flow. Second operand 10 states and 149 transitions. [2024-06-14 13:15:05,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 515 transitions, 8842 flow [2024-06-14 13:15:08,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 515 transitions, 8560 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:08,113 INFO L231 Difference]: Finished difference. Result has 374 places, 497 transitions, 7574 flow [2024-06-14 13:15:08,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7574, PETRI_PLACES=374, PETRI_TRANSITIONS=497} [2024-06-14 13:15:08,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-14 13:15:08,113 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 497 transitions, 7574 flow [2024-06-14 13:15:08,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:08,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:08,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:15:08,114 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:08,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1683090701, now seen corresponding path program 8 times [2024-06-14 13:15:08,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:08,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213167880] [2024-06-14 13:15:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:08,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:10,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:10,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213167880] [2024-06-14 13:15:10,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213167880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:10,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:10,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:10,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592001463] [2024-06-14 13:15:10,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:10,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:10,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:10,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:10,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:10,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:15:10,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 497 transitions, 7574 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:10,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:10,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:15:10,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:13,635 INFO L124 PetriNetUnfolderBase]: 2897/4504 cut-off events. [2024-06-14 13:15:13,635 INFO L125 PetriNetUnfolderBase]: For 807416/807453 co-relation queries the response was YES. [2024-06-14 13:15:13,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47721 conditions, 4504 events. 2897/4504 cut-off events. For 807416/807453 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24870 event pairs, 568 based on Foata normal form. 27/4531 useless extension candidates. Maximal degree in co-relation 47538. Up to 4116 conditions per place. [2024-06-14 13:15:13,695 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 385 selfloop transitions, 128 changer transitions 0/517 dead transitions. [2024-06-14 13:15:13,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 517 transitions, 8884 flow [2024-06-14 13:15:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:15:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:15:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-14 13:15:13,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346723044397463 [2024-06-14 13:15:13,696 INFO L175 Difference]: Start difference. First operand has 374 places, 497 transitions, 7574 flow. Second operand 11 states and 164 transitions. [2024-06-14 13:15:13,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 517 transitions, 8884 flow [2024-06-14 13:15:16,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 517 transitions, 8613 flow, removed 114 selfloop flow, removed 4 redundant places. [2024-06-14 13:15:16,187 INFO L231 Difference]: Finished difference. Result has 381 places, 497 transitions, 7565 flow [2024-06-14 13:15:16,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7303, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7565, PETRI_PLACES=381, PETRI_TRANSITIONS=497} [2024-06-14 13:15:16,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-14 13:15:16,188 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 497 transitions, 7565 flow [2024-06-14 13:15:16,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:16,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:16,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:16,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:15:16,188 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:16,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:16,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1683079355, now seen corresponding path program 5 times [2024-06-14 13:15:16,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:16,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372195563] [2024-06-14 13:15:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:16,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:18,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:18,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372195563] [2024-06-14 13:15:18,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372195563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:18,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:18,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:18,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873849255] [2024-06-14 13:15:18,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:18,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:18,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:18,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:18,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:15:18,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 497 transitions, 7565 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:18,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:18,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:15:18,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:21,081 INFO L124 PetriNetUnfolderBase]: 2907/4529 cut-off events. [2024-06-14 13:15:21,081 INFO L125 PetriNetUnfolderBase]: For 822645/822682 co-relation queries the response was YES. [2024-06-14 13:15:21,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48139 conditions, 4529 events. 2907/4529 cut-off events. For 822645/822682 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25200 event pairs, 893 based on Foata normal form. 27/4556 useless extension candidates. Maximal degree in co-relation 47954. Up to 4304 conditions per place. [2024-06-14 13:15:21,154 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 444 selfloop transitions, 71 changer transitions 0/519 dead transitions. [2024-06-14 13:15:21,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 519 transitions, 8838 flow [2024-06-14 13:15:21,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2024-06-14 13:15:21,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3395348837209302 [2024-06-14 13:15:21,155 INFO L175 Difference]: Start difference. First operand has 381 places, 497 transitions, 7565 flow. Second operand 10 states and 146 transitions. [2024-06-14 13:15:21,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 519 transitions, 8838 flow [2024-06-14 13:15:24,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 519 transitions, 8511 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-14 13:15:24,016 INFO L231 Difference]: Finished difference. Result has 381 places, 503 transitions, 7596 flow [2024-06-14 13:15:24,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7238, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7596, PETRI_PLACES=381, PETRI_TRANSITIONS=503} [2024-06-14 13:15:24,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-14 13:15:24,016 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 503 transitions, 7596 flow [2024-06-14 13:15:24,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:24,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:24,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:24,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:15:24,017 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:24,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1683090887, now seen corresponding path program 11 times [2024-06-14 13:15:24,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:24,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429790198] [2024-06-14 13:15:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:24,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:26,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:26,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429790198] [2024-06-14 13:15:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429790198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:26,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:26,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:26,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369614153] [2024-06-14 13:15:26,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:26,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:26,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:26,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:26,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:15:26,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 503 transitions, 7596 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:26,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:26,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:15:26,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:28,330 INFO L124 PetriNetUnfolderBase]: 2904/4512 cut-off events. [2024-06-14 13:15:28,330 INFO L125 PetriNetUnfolderBase]: For 824210/824247 co-relation queries the response was YES. [2024-06-14 13:15:28,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47920 conditions, 4512 events. 2904/4512 cut-off events. For 824210/824247 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24908 event pairs, 565 based on Foata normal form. 26/4538 useless extension candidates. Maximal degree in co-relation 47734. Up to 4270 conditions per place. [2024-06-14 13:15:28,404 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 454 selfloop transitions, 57 changer transitions 0/515 dead transitions. [2024-06-14 13:15:28,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 515 transitions, 8648 flow [2024-06-14 13:15:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:28,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:15:28,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35174418604651164 [2024-06-14 13:15:28,405 INFO L175 Difference]: Start difference. First operand has 381 places, 503 transitions, 7596 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:15:28,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 515 transitions, 8648 flow [2024-06-14 13:15:31,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 515 transitions, 8330 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:31,215 INFO L231 Difference]: Finished difference. Result has 382 places, 503 transitions, 7398 flow [2024-06-14 13:15:31,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7278, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7398, PETRI_PLACES=382, PETRI_TRANSITIONS=503} [2024-06-14 13:15:31,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-14 13:15:31,216 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 503 transitions, 7398 flow [2024-06-14 13:15:31,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:31,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:31,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:31,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:15:31,216 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:31,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:31,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1675727891, now seen corresponding path program 9 times [2024-06-14 13:15:31,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:31,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695442722] [2024-06-14 13:15:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:31,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:33,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:33,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695442722] [2024-06-14 13:15:33,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695442722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:33,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:33,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:33,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122782917] [2024-06-14 13:15:33,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:33,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:33,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:33,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:33,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:15:33,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 503 transitions, 7398 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:33,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:33,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:15:33,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:36,140 INFO L124 PetriNetUnfolderBase]: 2898/4506 cut-off events. [2024-06-14 13:15:36,140 INFO L125 PetriNetUnfolderBase]: For 831246/831283 co-relation queries the response was YES. [2024-06-14 13:15:36,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47578 conditions, 4506 events. 2898/4506 cut-off events. For 831246/831283 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24869 event pairs, 560 based on Foata normal form. 27/4533 useless extension candidates. Maximal degree in co-relation 47391. Up to 4121 conditions per place. [2024-06-14 13:15:36,210 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 395 selfloop transitions, 119 changer transitions 0/518 dead transitions. [2024-06-14 13:15:36,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 518 transitions, 8486 flow [2024-06-14 13:15:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:15:36,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-14 13:15:36,211 INFO L175 Difference]: Start difference. First operand has 382 places, 503 transitions, 7398 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:15:36,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 518 transitions, 8486 flow [2024-06-14 13:15:38,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 518 transitions, 8313 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:38,970 INFO L231 Difference]: Finished difference. Result has 384 places, 503 transitions, 7470 flow [2024-06-14 13:15:38,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7225, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7470, PETRI_PLACES=384, PETRI_TRANSITIONS=503} [2024-06-14 13:15:38,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 13:15:38,970 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 503 transitions, 7470 flow [2024-06-14 13:15:38,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:38,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:38,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:38,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:15:38,971 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:38,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1675727705, now seen corresponding path program 6 times [2024-06-14 13:15:38,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:38,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680633205] [2024-06-14 13:15:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:38,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:41,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:41,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680633205] [2024-06-14 13:15:41,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680633205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:41,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:41,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:41,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550865684] [2024-06-14 13:15:41,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:41,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:41,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:41,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:15:41,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 503 transitions, 7470 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:41,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:41,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:15:41,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:43,512 INFO L124 PetriNetUnfolderBase]: 2897/4518 cut-off events. [2024-06-14 13:15:43,512 INFO L125 PetriNetUnfolderBase]: For 841323/841360 co-relation queries the response was YES. [2024-06-14 13:15:43,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47594 conditions, 4518 events. 2897/4518 cut-off events. For 841323/841360 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25150 event pairs, 891 based on Foata normal form. 28/4546 useless extension candidates. Maximal degree in co-relation 47406. Up to 4253 conditions per place. [2024-06-14 13:15:43,576 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 416 selfloop transitions, 99 changer transitions 0/519 dead transitions. [2024-06-14 13:15:43,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 519 transitions, 8636 flow [2024-06-14 13:15:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 13:15:43,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 13:15:43,577 INFO L175 Difference]: Start difference. First operand has 384 places, 503 transitions, 7470 flow. Second operand 8 states and 124 transitions. [2024-06-14 13:15:43,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 519 transitions, 8636 flow [2024-06-14 13:15:46,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 519 transitions, 8266 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:46,665 INFO L231 Difference]: Finished difference. Result has 384 places, 506 transitions, 7424 flow [2024-06-14 13:15:46,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7100, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7424, PETRI_PLACES=384, PETRI_TRANSITIONS=506} [2024-06-14 13:15:46,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-14 13:15:46,665 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 506 transitions, 7424 flow [2024-06-14 13:15:46,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:46,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:46,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:46,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:15:46,666 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:46,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:46,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2083274179, now seen corresponding path program 7 times [2024-06-14 13:15:46,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:46,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324096002] [2024-06-14 13:15:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:46,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:50,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324096002] [2024-06-14 13:15:50,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324096002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:50,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:50,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:50,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732861077] [2024-06-14 13:15:50,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:50,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:50,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:50,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:50,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:50,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:15:50,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 506 transitions, 7424 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:50,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:50,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:15:50,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:52,093 INFO L124 PetriNetUnfolderBase]: 2936/4569 cut-off events. [2024-06-14 13:15:52,094 INFO L125 PetriNetUnfolderBase]: For 870133/870133 co-relation queries the response was YES. [2024-06-14 13:15:52,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48712 conditions, 4569 events. 2936/4569 cut-off events. For 870133/870133 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25403 event pairs, 879 based on Foata normal form. 2/4571 useless extension candidates. Maximal degree in co-relation 48523. Up to 4303 conditions per place. [2024-06-14 13:15:52,164 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 473 selfloop transitions, 70 changer transitions 0/547 dead transitions. [2024-06-14 13:15:52,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 547 transitions, 9165 flow [2024-06-14 13:15:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-14 13:15:52,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-14 13:15:52,165 INFO L175 Difference]: Start difference. First operand has 384 places, 506 transitions, 7424 flow. Second operand 10 states and 157 transitions. [2024-06-14 13:15:52,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 547 transitions, 9165 flow [2024-06-14 13:15:55,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 547 transitions, 8893 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:55,320 INFO L231 Difference]: Finished difference. Result has 390 places, 517 transitions, 7663 flow [2024-06-14 13:15:55,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7152, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7663, PETRI_PLACES=390, PETRI_TRANSITIONS=517} [2024-06-14 13:15:55,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-14 13:15:55,320 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 517 transitions, 7663 flow [2024-06-14 13:15:55,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:55,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:55,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:55,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:15:55,321 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:55,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1836576101, now seen corresponding path program 8 times [2024-06-14 13:15:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:55,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915876824] [2024-06-14 13:15:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:55,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:58,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:58,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915876824] [2024-06-14 13:15:58,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915876824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:58,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:58,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:58,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109187957] [2024-06-14 13:15:58,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:58,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:58,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:15:58,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 517 transitions, 7663 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:58,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:58,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:15:58,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:00,551 INFO L124 PetriNetUnfolderBase]: 2946/4583 cut-off events. [2024-06-14 13:16:00,551 INFO L125 PetriNetUnfolderBase]: For 889633/889633 co-relation queries the response was YES. [2024-06-14 13:16:00,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49278 conditions, 4583 events. 2946/4583 cut-off events. For 889633/889633 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 25460 event pairs, 881 based on Foata normal form. 2/4585 useless extension candidates. Maximal degree in co-relation 49086. Up to 4324 conditions per place. [2024-06-14 13:16:00,625 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 468 selfloop transitions, 70 changer transitions 0/542 dead transitions. [2024-06-14 13:16:00,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 542 transitions, 8935 flow [2024-06-14 13:16:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:16:00,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-14 13:16:00,626 INFO L175 Difference]: Start difference. First operand has 390 places, 517 transitions, 7663 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:16:00,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 542 transitions, 8935 flow [2024-06-14 13:16:04,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 542 transitions, 8708 flow, removed 90 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:04,415 INFO L231 Difference]: Finished difference. Result has 395 places, 520 transitions, 7718 flow [2024-06-14 13:16:04,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7436, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7718, PETRI_PLACES=395, PETRI_TRANSITIONS=520} [2024-06-14 13:16:04,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-14 13:16:04,416 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 520 transitions, 7718 flow [2024-06-14 13:16:04,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:04,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:04,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:04,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:16:04,416 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:04,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2002538773, now seen corresponding path program 9 times [2024-06-14 13:16:04,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:04,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358942003] [2024-06-14 13:16:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:04,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:07,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:07,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358942003] [2024-06-14 13:16:07,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358942003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:07,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:07,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:07,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628952258] [2024-06-14 13:16:07,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:07,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:07,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:07,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:07,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:16:07,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 520 transitions, 7718 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:07,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:07,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:16:07,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:09,635 INFO L124 PetriNetUnfolderBase]: 2956/4595 cut-off events. [2024-06-14 13:16:09,635 INFO L125 PetriNetUnfolderBase]: For 904429/904429 co-relation queries the response was YES. [2024-06-14 13:16:09,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49746 conditions, 4595 events. 2956/4595 cut-off events. For 904429/904429 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 25521 event pairs, 877 based on Foata normal form. 2/4597 useless extension candidates. Maximal degree in co-relation 49553. Up to 4135 conditions per place. [2024-06-14 13:16:09,710 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 410 selfloop transitions, 159 changer transitions 0/573 dead transitions. [2024-06-14 13:16:09,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 573 transitions, 9800 flow [2024-06-14 13:16:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:16:09,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:16:09,711 INFO L175 Difference]: Start difference. First operand has 395 places, 520 transitions, 7718 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:16:09,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 573 transitions, 9800 flow [2024-06-14 13:16:12,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 573 transitions, 9521 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-14 13:16:12,973 INFO L231 Difference]: Finished difference. Result has 399 places, 546 transitions, 8592 flow [2024-06-14 13:16:12,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7441, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8592, PETRI_PLACES=399, PETRI_TRANSITIONS=546} [2024-06-14 13:16:12,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-14 13:16:12,974 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 546 transitions, 8592 flow [2024-06-14 13:16:12,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:12,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:12,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:12,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:16:12,974 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:12,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:12,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1287363747, now seen corresponding path program 10 times [2024-06-14 13:16:12,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:12,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794427566] [2024-06-14 13:16:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:12,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:15,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:15,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794427566] [2024-06-14 13:16:15,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794427566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:15,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:15,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:15,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367620568] [2024-06-14 13:16:15,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:15,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:15,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:15,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:15,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:16:15,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 546 transitions, 8592 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:15,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:15,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:16:15,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:18,180 INFO L124 PetriNetUnfolderBase]: 3045/4724 cut-off events. [2024-06-14 13:16:18,180 INFO L125 PetriNetUnfolderBase]: For 988053/988053 co-relation queries the response was YES. [2024-06-14 13:16:18,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53881 conditions, 4724 events. 3045/4724 cut-off events. For 988053/988053 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26347 event pairs, 885 based on Foata normal form. 3/4727 useless extension candidates. Maximal degree in co-relation 53685. Up to 4304 conditions per place. [2024-06-14 13:16:18,260 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 442 selfloop transitions, 151 changer transitions 0/597 dead transitions. [2024-06-14 13:16:18,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 597 transitions, 11244 flow [2024-06-14 13:16:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:16:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:16:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 171 transitions. [2024-06-14 13:16:18,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36152219873150104 [2024-06-14 13:16:18,261 INFO L175 Difference]: Start difference. First operand has 399 places, 546 transitions, 8592 flow. Second operand 11 states and 171 transitions. [2024-06-14 13:16:18,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 597 transitions, 11244 flow [2024-06-14 13:16:22,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 597 transitions, 11010 flow, removed 102 selfloop flow, removed 3 redundant places. [2024-06-14 13:16:22,292 INFO L231 Difference]: Finished difference. Result has 409 places, 571 transitions, 9703 flow [2024-06-14 13:16:22,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8396, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9703, PETRI_PLACES=409, PETRI_TRANSITIONS=571} [2024-06-14 13:16:22,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 13:16:22,292 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 571 transitions, 9703 flow [2024-06-14 13:16:22,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:22,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:22,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:22,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:16:22,293 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:22,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:22,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1121175829, now seen corresponding path program 10 times [2024-06-14 13:16:22,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:22,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538942484] [2024-06-14 13:16:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:22,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:25,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:25,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538942484] [2024-06-14 13:16:25,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538942484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:25,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:25,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:25,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143773890] [2024-06-14 13:16:25,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:25,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:25,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:25,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:25,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:16:25,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 571 transitions, 9703 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:25,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:25,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:16:25,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:27,568 INFO L124 PetriNetUnfolderBase]: 3055/4731 cut-off events. [2024-06-14 13:16:27,568 INFO L125 PetriNetUnfolderBase]: For 1000865/1000865 co-relation queries the response was YES. [2024-06-14 13:16:27,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54799 conditions, 4731 events. 3055/4731 cut-off events. For 1000865/1000865 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26189 event pairs, 545 based on Foata normal form. 2/4733 useless extension candidates. Maximal degree in co-relation 54598. Up to 4262 conditions per place. [2024-06-14 13:16:27,647 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 464 selfloop transitions, 132 changer transitions 0/600 dead transitions. [2024-06-14 13:16:27,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 600 transitions, 11456 flow [2024-06-14 13:16:27,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:16:27,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 13:16:27,648 INFO L175 Difference]: Start difference. First operand has 409 places, 571 transitions, 9703 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:16:27,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 600 transitions, 11456 flow [2024-06-14 13:16:31,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 600 transitions, 10991 flow, removed 170 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:31,965 INFO L231 Difference]: Finished difference. Result has 412 places, 577 transitions, 9735 flow [2024-06-14 13:16:31,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9238, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9735, PETRI_PLACES=412, PETRI_TRANSITIONS=577} [2024-06-14 13:16:31,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-14 13:16:31,966 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 577 transitions, 9735 flow [2024-06-14 13:16:31,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:31,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:31,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:31,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:16:31,966 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:31,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1115635075, now seen corresponding path program 11 times [2024-06-14 13:16:31,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:31,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924952746] [2024-06-14 13:16:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:31,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:34,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:34,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924952746] [2024-06-14 13:16:34,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924952746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:34,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:34,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:34,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444382971] [2024-06-14 13:16:34,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:34,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:34,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:34,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:34,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:34,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:16:34,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 577 transitions, 9735 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:34,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:34,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:16:34,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:36,710 INFO L124 PetriNetUnfolderBase]: 3057/4741 cut-off events. [2024-06-14 13:16:36,711 INFO L125 PetriNetUnfolderBase]: For 1011727/1011727 co-relation queries the response was YES. [2024-06-14 13:16:36,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55041 conditions, 4741 events. 3057/4741 cut-off events. For 1011727/1011727 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26442 event pairs, 882 based on Foata normal form. 2/4743 useless extension candidates. Maximal degree in co-relation 54838. Up to 4542 conditions per place. [2024-06-14 13:16:36,788 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 545 selfloop transitions, 49 changer transitions 0/598 dead transitions. [2024-06-14 13:16:36,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 598 transitions, 11091 flow [2024-06-14 13:16:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:16:36,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-14 13:16:36,789 INFO L175 Difference]: Start difference. First operand has 412 places, 577 transitions, 9735 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:16:36,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 598 transitions, 11091 flow [2024-06-14 13:16:40,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 598 transitions, 10924 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:40,485 INFO L231 Difference]: Finished difference. Result has 417 places, 580 transitions, 9794 flow [2024-06-14 13:16:40,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9568, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9794, PETRI_PLACES=417, PETRI_TRANSITIONS=580} [2024-06-14 13:16:40,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 13:16:40,485 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 580 transitions, 9794 flow [2024-06-14 13:16:40,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:40,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:40,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:40,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:16:40,486 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:40,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:40,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1282001367, now seen corresponding path program 12 times [2024-06-14 13:16:40,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:40,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566679454] [2024-06-14 13:16:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:40,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:43,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:43,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566679454] [2024-06-14 13:16:43,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566679454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:43,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:43,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622166557] [2024-06-14 13:16:43,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:43,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:43,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:43,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:43,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:16:43,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 580 transitions, 9794 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:43,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:43,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:16:43,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:45,117 INFO L124 PetriNetUnfolderBase]: 3059/4744 cut-off events. [2024-06-14 13:16:45,117 INFO L125 PetriNetUnfolderBase]: For 1018003/1018003 co-relation queries the response was YES. [2024-06-14 13:16:45,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54921 conditions, 4744 events. 3059/4744 cut-off events. For 1018003/1018003 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26486 event pairs, 890 based on Foata normal form. 2/4746 useless extension candidates. Maximal degree in co-relation 54716. Up to 4375 conditions per place. [2024-06-14 13:16:45,188 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 450 selfloop transitions, 151 changer transitions 0/605 dead transitions. [2024-06-14 13:16:45,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 605 transitions, 11447 flow [2024-06-14 13:16:45,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:16:45,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 13:16:45,189 INFO L175 Difference]: Start difference. First operand has 417 places, 580 transitions, 9794 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:16:45,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 605 transitions, 11447 flow [2024-06-14 13:16:48,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 605 transitions, 11206 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 13:16:48,676 INFO L231 Difference]: Finished difference. Result has 419 places, 583 transitions, 10011 flow [2024-06-14 13:16:48,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9553, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10011, PETRI_PLACES=419, PETRI_TRANSITIONS=583} [2024-06-14 13:16:48,677 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 13:16:48,677 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 583 transitions, 10011 flow [2024-06-14 13:16:48,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:48,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:48,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:48,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:16:48,677 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:48,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1121176015, now seen corresponding path program 13 times [2024-06-14 13:16:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:48,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954795178] [2024-06-14 13:16:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:48,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:51,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:51,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954795178] [2024-06-14 13:16:51,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954795178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:51,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:51,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793926601] [2024-06-14 13:16:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:51,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:51,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:51,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:16:51,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 583 transitions, 10011 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:51,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:51,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:16:51,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:53,355 INFO L124 PetriNetUnfolderBase]: 3050/4730 cut-off events. [2024-06-14 13:16:53,355 INFO L125 PetriNetUnfolderBase]: For 1021082/1021082 co-relation queries the response was YES. [2024-06-14 13:16:53,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54632 conditions, 4730 events. 3050/4730 cut-off events. For 1021082/1021082 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26359 event pairs, 891 based on Foata normal form. 3/4733 useless extension candidates. Maximal degree in co-relation 54426. Up to 4437 conditions per place. [2024-06-14 13:16:53,438 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 491 selfloop transitions, 107 changer transitions 0/602 dead transitions. [2024-06-14 13:16:53,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 602 transitions, 11268 flow [2024-06-14 13:16:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:16:53,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 13:16:53,440 INFO L175 Difference]: Start difference. First operand has 419 places, 583 transitions, 10011 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:16:53,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 602 transitions, 11268 flow [2024-06-14 13:16:57,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 602 transitions, 10635 flow, removed 169 selfloop flow, removed 7 redundant places. [2024-06-14 13:16:57,350 INFO L231 Difference]: Finished difference. Result has 421 places, 583 transitions, 9604 flow [2024-06-14 13:16:57,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9378, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9604, PETRI_PLACES=421, PETRI_TRANSITIONS=583} [2024-06-14 13:16:57,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-14 13:16:57,350 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 583 transitions, 9604 flow [2024-06-14 13:16:57,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:57,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:57,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:57,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:16:57,351 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:57,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash 506871641, now seen corresponding path program 11 times [2024-06-14 13:16:57,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:57,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258781348] [2024-06-14 13:16:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:57,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:00,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:00,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258781348] [2024-06-14 13:17:00,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258781348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:00,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:00,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388906853] [2024-06-14 13:17:00,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:00,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:00,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:17:00,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 583 transitions, 9604 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:00,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:00,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:17:00,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:02,895 INFO L124 PetriNetUnfolderBase]: 3060/4731 cut-off events. [2024-06-14 13:17:02,895 INFO L125 PetriNetUnfolderBase]: For 1028039/1028039 co-relation queries the response was YES. [2024-06-14 13:17:02,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54575 conditions, 4731 events. 3060/4731 cut-off events. For 1028039/1028039 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26146 event pairs, 533 based on Foata normal form. 2/4733 useless extension candidates. Maximal degree in co-relation 54368. Up to 4547 conditions per place. [2024-06-14 13:17:02,968 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 560 selfloop transitions, 38 changer transitions 0/602 dead transitions. [2024-06-14 13:17:02,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 602 transitions, 10996 flow [2024-06-14 13:17:02,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-14 13:17:02,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3462532299741602 [2024-06-14 13:17:02,969 INFO L175 Difference]: Start difference. First operand has 421 places, 583 transitions, 9604 flow. Second operand 9 states and 134 transitions. [2024-06-14 13:17:02,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 602 transitions, 10996 flow [2024-06-14 13:17:06,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 602 transitions, 10726 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:06,490 INFO L231 Difference]: Finished difference. Result has 422 places, 586 transitions, 9538 flow [2024-06-14 13:17:06,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9334, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9538, PETRI_PLACES=422, PETRI_TRANSITIONS=586} [2024-06-14 13:17:06,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-14 13:17:06,490 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 586 transitions, 9538 flow [2024-06-14 13:17:06,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:06,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:06,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:06,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:17:06,491 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:06,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:06,491 INFO L85 PathProgramCache]: Analyzing trace with hash -308108807, now seen corresponding path program 14 times [2024-06-14 13:17:06,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:06,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169792670] [2024-06-14 13:17:06,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:06,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:06,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:09,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:09,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169792670] [2024-06-14 13:17:09,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169792670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:09,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:09,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:09,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82087726] [2024-06-14 13:17:09,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:09,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:09,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:09,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:09,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:09,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:17:09,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 586 transitions, 9538 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:09,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:09,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:17:09,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:11,448 INFO L124 PetriNetUnfolderBase]: 3054/4741 cut-off events. [2024-06-14 13:17:11,449 INFO L125 PetriNetUnfolderBase]: For 1032036/1032068 co-relation queries the response was YES. [2024-06-14 13:17:11,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54216 conditions, 4741 events. 3054/4741 cut-off events. For 1032036/1032068 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26491 event pairs, 897 based on Foata normal form. 23/4764 useless extension candidates. Maximal degree in co-relation 54008. Up to 4539 conditions per place. [2024-06-14 13:17:11,523 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 549 selfloop transitions, 47 changer transitions 0/600 dead transitions. [2024-06-14 13:17:11,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 600 transitions, 10778 flow [2024-06-14 13:17:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-14 13:17:11,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385012919896641 [2024-06-14 13:17:11,525 INFO L175 Difference]: Start difference. First operand has 422 places, 586 transitions, 9538 flow. Second operand 9 states and 131 transitions. [2024-06-14 13:17:11,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 600 transitions, 10778 flow [2024-06-14 13:17:15,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 600 transitions, 10373 flow, removed 83 selfloop flow, removed 11 redundant places. [2024-06-14 13:17:15,964 INFO L231 Difference]: Finished difference. Result has 420 places, 586 transitions, 9233 flow [2024-06-14 13:17:15,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9233, PETRI_PLACES=420, PETRI_TRANSITIONS=586} [2024-06-14 13:17:15,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-14 13:17:15,964 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 586 transitions, 9233 flow [2024-06-14 13:17:15,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:15,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:15,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:15,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:17:15,965 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:15,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash 52127131, now seen corresponding path program 15 times [2024-06-14 13:17:15,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:15,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773910173] [2024-06-14 13:17:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:15,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773910173] [2024-06-14 13:17:18,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773910173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:18,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:18,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:18,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774514367] [2024-06-14 13:17:18,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:18,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:18,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:18,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:18,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:18,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:17:18,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 586 transitions, 9233 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:18,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:18,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:17:18,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:20,822 INFO L124 PetriNetUnfolderBase]: 3082/4782 cut-off events. [2024-06-14 13:17:20,822 INFO L125 PetriNetUnfolderBase]: For 1069468/1069500 co-relation queries the response was YES. [2024-06-14 13:17:21,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54892 conditions, 4782 events. 3082/4782 cut-off events. For 1069468/1069500 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 26742 event pairs, 896 based on Foata normal form. 25/4807 useless extension candidates. Maximal degree in co-relation 54685. Up to 4445 conditions per place. [2024-06-14 13:17:21,053 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 486 selfloop transitions, 128 changer transitions 0/618 dead transitions. [2024-06-14 13:17:21,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 618 transitions, 11351 flow [2024-06-14 13:17:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:17:21,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35917312661498707 [2024-06-14 13:17:21,055 INFO L175 Difference]: Start difference. First operand has 420 places, 586 transitions, 9233 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:17:21,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 618 transitions, 11351 flow [2024-06-14 13:17:25,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 618 transitions, 11213 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 13:17:25,073 INFO L231 Difference]: Finished difference. Result has 421 places, 600 transitions, 10001 flow [2024-06-14 13:17:25,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9095, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10001, PETRI_PLACES=421, PETRI_TRANSITIONS=600} [2024-06-14 13:17:25,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-14 13:17:25,074 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 600 transitions, 10001 flow [2024-06-14 13:17:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:25,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:25,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:25,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:17:25,074 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:25,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1827329659, now seen corresponding path program 16 times [2024-06-14 13:17:25,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:25,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807028166] [2024-06-14 13:17:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:25,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:27,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:27,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807028166] [2024-06-14 13:17:27,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807028166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:27,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:27,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897545965] [2024-06-14 13:17:27,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:27,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:27,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:17:27,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 600 transitions, 10001 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:27,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:27,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:17:27,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:30,413 INFO L124 PetriNetUnfolderBase]: 3134/4857 cut-off events. [2024-06-14 13:17:30,413 INFO L125 PetriNetUnfolderBase]: For 1130373/1130405 co-relation queries the response was YES. [2024-06-14 13:17:30,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57425 conditions, 4857 events. 3134/4857 cut-off events. For 1130373/1130405 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 27253 event pairs, 784 based on Foata normal form. 29/4886 useless extension candidates. Maximal degree in co-relation 57216. Up to 4054 conditions per place. [2024-06-14 13:17:30,490 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 398 selfloop transitions, 241 changer transitions 0/643 dead transitions. [2024-06-14 13:17:30,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 643 transitions, 12559 flow [2024-06-14 13:17:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:17:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:17:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 13:17:30,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-14 13:17:30,491 INFO L175 Difference]: Start difference. First operand has 421 places, 600 transitions, 10001 flow. Second operand 10 states and 158 transitions. [2024-06-14 13:17:30,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 643 transitions, 12559 flow [2024-06-14 13:17:34,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 643 transitions, 12109 flow, removed 168 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:34,528 INFO L231 Difference]: Finished difference. Result has 427 places, 619 transitions, 10957 flow [2024-06-14 13:17:34,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9551, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10957, PETRI_PLACES=427, PETRI_TRANSITIONS=619} [2024-06-14 13:17:34,529 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-14 13:17:34,529 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 619 transitions, 10957 flow [2024-06-14 13:17:34,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:34,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:34,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:34,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:17:34,530 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:34,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash 280021771, now seen corresponding path program 17 times [2024-06-14 13:17:34,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716931552] [2024-06-14 13:17:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:34,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:37,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:37,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716931552] [2024-06-14 13:17:37,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716931552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:37,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:37,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:37,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355851792] [2024-06-14 13:17:37,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:37,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:37,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:17:37,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 619 transitions, 10957 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:37,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:37,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:17:37,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:39,619 INFO L124 PetriNetUnfolderBase]: 3149/4885 cut-off events. [2024-06-14 13:17:39,619 INFO L125 PetriNetUnfolderBase]: For 1161028/1161060 co-relation queries the response was YES. [2024-06-14 13:17:39,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59472 conditions, 4885 events. 3149/4885 cut-off events. For 1161028/1161060 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27426 event pairs, 896 based on Foata normal form. 24/4909 useless extension candidates. Maximal degree in co-relation 59260. Up to 4577 conditions per place. [2024-06-14 13:17:39,706 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 528 selfloop transitions, 110 changer transitions 0/642 dead transitions. [2024-06-14 13:17:39,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 642 transitions, 12675 flow [2024-06-14 13:17:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:17:39,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-14 13:17:39,707 INFO L175 Difference]: Start difference. First operand has 427 places, 619 transitions, 10957 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:17:39,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 642 transitions, 12675 flow [2024-06-14 13:17:44,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 642 transitions, 12309 flow, removed 150 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:44,752 INFO L231 Difference]: Finished difference. Result has 431 places, 627 transitions, 11228 flow [2024-06-14 13:17:44,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10639, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11228, PETRI_PLACES=431, PETRI_TRANSITIONS=627} [2024-06-14 13:17:44,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-14 13:17:44,752 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 627 transitions, 11228 flow [2024-06-14 13:17:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:44,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:44,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:44,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:17:44,752 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:44,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:44,753 INFO L85 PathProgramCache]: Analyzing trace with hash 245790815, now seen corresponding path program 18 times [2024-06-14 13:17:44,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:44,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491137029] [2024-06-14 13:17:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:44,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:47,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:47,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491137029] [2024-06-14 13:17:47,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491137029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:47,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:47,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:47,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831594957] [2024-06-14 13:17:47,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:47,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:47,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:47,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:17:47,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 627 transitions, 11228 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:47,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:47,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:17:47,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:49,596 INFO L124 PetriNetUnfolderBase]: 3148/4880 cut-off events. [2024-06-14 13:17:49,596 INFO L125 PetriNetUnfolderBase]: For 1161386/1161418 co-relation queries the response was YES. [2024-06-14 13:17:49,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59310 conditions, 4880 events. 3148/4880 cut-off events. For 1161386/1161418 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 27393 event pairs, 893 based on Foata normal form. 24/4904 useless extension candidates. Maximal degree in co-relation 59098. Up to 4576 conditions per place. [2024-06-14 13:17:49,689 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 534 selfloop transitions, 107 changer transitions 0/645 dead transitions. [2024-06-14 13:17:49,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 645 transitions, 12680 flow [2024-06-14 13:17:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 13:17:49,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35400516795865633 [2024-06-14 13:17:49,690 INFO L175 Difference]: Start difference. First operand has 431 places, 627 transitions, 11228 flow. Second operand 9 states and 137 transitions. [2024-06-14 13:17:49,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 645 transitions, 12680 flow [2024-06-14 13:17:54,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 645 transitions, 12226 flow, removed 122 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:54,255 INFO L231 Difference]: Finished difference. Result has 433 places, 630 transitions, 11122 flow [2024-06-14 13:17:54,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10774, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11122, PETRI_PLACES=433, PETRI_TRANSITIONS=630} [2024-06-14 13:17:54,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-14 13:17:54,255 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 630 transitions, 11122 flow [2024-06-14 13:17:54,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:54,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:54,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:54,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:17:54,256 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:54,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash 430668719, now seen corresponding path program 19 times [2024-06-14 13:17:54,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:54,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288709301] [2024-06-14 13:17:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:56,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:56,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288709301] [2024-06-14 13:17:56,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288709301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:56,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:56,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:56,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908581624] [2024-06-14 13:17:56,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:56,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:56,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:56,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:17:56,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 630 transitions, 11122 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:56,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:56,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:17:56,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:58,922 INFO L124 PetriNetUnfolderBase]: 3142/4874 cut-off events. [2024-06-14 13:17:58,923 INFO L125 PetriNetUnfolderBase]: For 1154569/1154601 co-relation queries the response was YES. [2024-06-14 13:17:58,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58836 conditions, 4874 events. 3142/4874 cut-off events. For 1154569/1154601 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 27364 event pairs, 892 based on Foata normal form. 23/4897 useless extension candidates. Maximal degree in co-relation 58623. Up to 4535 conditions per place. [2024-06-14 13:17:59,000 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 509 selfloop transitions, 137 changer transitions 0/650 dead transitions. [2024-06-14 13:17:59,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 650 transitions, 12766 flow [2024-06-14 13:17:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 13:17:59,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35658914728682173 [2024-06-14 13:17:59,001 INFO L175 Difference]: Start difference. First operand has 433 places, 630 transitions, 11122 flow. Second operand 9 states and 138 transitions. [2024-06-14 13:17:59,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 650 transitions, 12766 flow [2024-06-14 13:18:03,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 650 transitions, 12338 flow, removed 112 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:03,651 INFO L231 Difference]: Finished difference. Result has 435 places, 631 transitions, 10988 flow [2024-06-14 13:18:03,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10694, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10988, PETRI_PLACES=435, PETRI_TRANSITIONS=631} [2024-06-14 13:18:03,651 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-14 13:18:03,651 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 631 transitions, 10988 flow [2024-06-14 13:18:03,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:03,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:03,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:03,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:18:03,651 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:03,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1279208313, now seen corresponding path program 12 times [2024-06-14 13:18:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:03,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886394380] [2024-06-14 13:18:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:03,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:06,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:06,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886394380] [2024-06-14 13:18:06,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886394380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:06,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:06,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212754215] [2024-06-14 13:18:06,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:06,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:06,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:06,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:06,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:18:06,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 631 transitions, 10988 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:06,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:06,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:18:06,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:08,931 INFO L124 PetriNetUnfolderBase]: 3168/4903 cut-off events. [2024-06-14 13:18:08,931 INFO L125 PetriNetUnfolderBase]: For 1188806/1188838 co-relation queries the response was YES. [2024-06-14 13:18:08,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59666 conditions, 4903 events. 3168/4903 cut-off events. For 1188806/1188838 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27370 event pairs, 561 based on Foata normal form. 23/4926 useless extension candidates. Maximal degree in co-relation 59452. Up to 4408 conditions per place. [2024-06-14 13:18:09,019 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 506 selfloop transitions, 146 changer transitions 0/656 dead transitions. [2024-06-14 13:18:09,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 656 transitions, 13133 flow [2024-06-14 13:18:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:18:09,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 13:18:09,020 INFO L175 Difference]: Start difference. First operand has 435 places, 631 transitions, 10988 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:18:09,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 656 transitions, 13133 flow [2024-06-14 13:18:14,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 656 transitions, 12615 flow, removed 108 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:14,271 INFO L231 Difference]: Finished difference. Result has 438 places, 637 transitions, 11020 flow [2024-06-14 13:18:14,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10471, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11020, PETRI_PLACES=438, PETRI_TRANSITIONS=637} [2024-06-14 13:18:14,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-14 13:18:14,272 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 637 transitions, 11020 flow [2024-06-14 13:18:14,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:14,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:14,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:14,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:18:14,272 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:14,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1456339833, now seen corresponding path program 13 times [2024-06-14 13:18:14,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:14,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126562645] [2024-06-14 13:18:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:14,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:17,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126562645] [2024-06-14 13:18:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126562645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:17,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:17,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:17,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558734361] [2024-06-14 13:18:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:17,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:17,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:17,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:17,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:18:17,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 637 transitions, 11020 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:17,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:17,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:18:17,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:19,554 INFO L124 PetriNetUnfolderBase]: 3162/4893 cut-off events. [2024-06-14 13:18:19,554 INFO L125 PetriNetUnfolderBase]: For 1189866/1189898 co-relation queries the response was YES. [2024-06-14 13:18:19,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58991 conditions, 4893 events. 3162/4893 cut-off events. For 1189866/1189898 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27316 event pairs, 561 based on Foata normal form. 23/4916 useless extension candidates. Maximal degree in co-relation 58778. Up to 4403 conditions per place. [2024-06-14 13:18:19,639 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 505 selfloop transitions, 147 changer transitions 0/656 dead transitions. [2024-06-14 13:18:19,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 656 transitions, 12688 flow [2024-06-14 13:18:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:18:19,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 13:18:19,640 INFO L175 Difference]: Start difference. First operand has 438 places, 637 transitions, 11020 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:18:19,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 656 transitions, 12688 flow [2024-06-14 13:18:23,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 656 transitions, 12351 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-14 13:18:23,994 INFO L231 Difference]: Finished difference. Result has 443 places, 637 transitions, 10984 flow [2024-06-14 13:18:23,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10683, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10984, PETRI_PLACES=443, PETRI_TRANSITIONS=637} [2024-06-14 13:18:23,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-14 13:18:23,995 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 637 transitions, 10984 flow [2024-06-14 13:18:23,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:23,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:23,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:23,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:18:23,995 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:23,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:23,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2004698329, now seen corresponding path program 20 times [2024-06-14 13:18:23,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:23,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795503265] [2024-06-14 13:18:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:23,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:24,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:26,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:26,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795503265] [2024-06-14 13:18:26,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795503265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:26,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:26,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:26,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857427466] [2024-06-14 13:18:26,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:26,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:26,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:26,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:26,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:26,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:18:26,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 637 transitions, 10984 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:26,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:26,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:18:26,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:28,853 INFO L124 PetriNetUnfolderBase]: 3156/4896 cut-off events. [2024-06-14 13:18:28,853 INFO L125 PetriNetUnfolderBase]: For 1189850/1189882 co-relation queries the response was YES. [2024-06-14 13:18:28,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58537 conditions, 4896 events. 3156/4896 cut-off events. For 1189850/1189882 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27538 event pairs, 892 based on Foata normal form. 23/4919 useless extension candidates. Maximal degree in co-relation 58323. Up to 4650 conditions per place. [2024-06-14 13:18:28,940 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 569 selfloop transitions, 79 changer transitions 0/652 dead transitions. [2024-06-14 13:18:28,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 652 transitions, 12334 flow [2024-06-14 13:18:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:28,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-14 13:18:28,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34108527131782945 [2024-06-14 13:18:28,941 INFO L175 Difference]: Start difference. First operand has 443 places, 637 transitions, 10984 flow. Second operand 9 states and 132 transitions. [2024-06-14 13:18:28,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 652 transitions, 12334 flow [2024-06-14 13:18:33,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 652 transitions, 11781 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-06-14 13:18:33,669 INFO L231 Difference]: Finished difference. Result has 444 places, 638 transitions, 10609 flow [2024-06-14 13:18:33,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10431, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10609, PETRI_PLACES=444, PETRI_TRANSITIONS=638} [2024-06-14 13:18:33,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-14 13:18:33,670 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 638 transitions, 10609 flow [2024-06-14 13:18:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:33,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:33,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:33,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:18:33,670 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:33,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:33,671 INFO L85 PathProgramCache]: Analyzing trace with hash 245790629, now seen corresponding path program 14 times [2024-06-14 13:18:33,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:33,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593214071] [2024-06-14 13:18:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:36,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:36,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593214071] [2024-06-14 13:18:36,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593214071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:36,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:36,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56197286] [2024-06-14 13:18:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:36,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:36,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:36,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:18:36,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 638 transitions, 10609 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:36,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:36,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:18:36,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:39,046 INFO L124 PetriNetUnfolderBase]: 3150/4875 cut-off events. [2024-06-14 13:18:39,047 INFO L125 PetriNetUnfolderBase]: For 1187333/1187365 co-relation queries the response was YES. [2024-06-14 13:18:39,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57664 conditions, 4875 events. 3150/4875 cut-off events. For 1187333/1187365 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27218 event pairs, 557 based on Foata normal form. 23/4898 useless extension candidates. Maximal degree in co-relation 57450. Up to 4390 conditions per place. [2024-06-14 13:18:39,122 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 511 selfloop transitions, 140 changer transitions 0/655 dead transitions. [2024-06-14 13:18:39,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 655 transitions, 12015 flow [2024-06-14 13:18:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:18:39,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 13:18:39,124 INFO L175 Difference]: Start difference. First operand has 444 places, 638 transitions, 10609 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:18:39,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 655 transitions, 12015 flow [2024-06-14 13:18:43,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 655 transitions, 11775 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:43,678 INFO L231 Difference]: Finished difference. Result has 448 places, 638 transitions, 10656 flow [2024-06-14 13:18:43,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10369, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10656, PETRI_PLACES=448, PETRI_TRANSITIONS=638} [2024-06-14 13:18:43,679 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-14 13:18:43,679 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 638 transitions, 10656 flow [2024-06-14 13:18:43,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:43,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:43,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:43,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:18:43,680 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:43,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1817300131, now seen corresponding path program 1 times [2024-06-14 13:18:43,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:43,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426457474] [2024-06-14 13:18:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:43,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:46,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:46,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426457474] [2024-06-14 13:18:46,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426457474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:46,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:46,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:18:46,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088171213] [2024-06-14 13:18:46,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:46,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:18:46,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:18:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:18:46,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:18:46,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 638 transitions, 10656 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:18:46,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:46,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:18:46,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:49,215 INFO L124 PetriNetUnfolderBase]: 3237/5022 cut-off events. [2024-06-14 13:18:49,216 INFO L125 PetriNetUnfolderBase]: For 1334537/1334537 co-relation queries the response was YES. [2024-06-14 13:18:49,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60199 conditions, 5022 events. 3237/5022 cut-off events. For 1334537/1334537 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 28381 event pairs, 1258 based on Foata normal form. 8/5030 useless extension candidates. Maximal degree in co-relation 59984. Up to 4513 conditions per place. [2024-06-14 13:18:49,304 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 578 selfloop transitions, 112 changer transitions 0/694 dead transitions. [2024-06-14 13:18:49,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 694 transitions, 12943 flow [2024-06-14 13:18:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:18:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:18:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:18:49,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:18:49,306 INFO L175 Difference]: Start difference. First operand has 448 places, 638 transitions, 10656 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:18:49,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 694 transitions, 12943 flow [2024-06-14 13:18:54,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 694 transitions, 12466 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:18:54,468 INFO L231 Difference]: Finished difference. Result has 450 places, 643 transitions, 10519 flow [2024-06-14 13:18:54,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10179, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10519, PETRI_PLACES=450, PETRI_TRANSITIONS=643} [2024-06-14 13:18:54,469 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 406 predicate places. [2024-06-14 13:18:54,469 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 643 transitions, 10519 flow [2024-06-14 13:18:54,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:18:54,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:54,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:54,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:18:54,469 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:54,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:54,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1916115361, now seen corresponding path program 2 times [2024-06-14 13:18:54,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:54,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582909895] [2024-06-14 13:18:54,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:54,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:57,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:57,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582909895] [2024-06-14 13:18:57,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582909895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:57,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:57,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:18:57,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771807773] [2024-06-14 13:18:57,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:57,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:18:57,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:57,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:18:57,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:18:57,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:18:57,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 643 transitions, 10519 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:18:57,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:57,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:18:57,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:00,300 INFO L124 PetriNetUnfolderBase]: 3273/5082 cut-off events. [2024-06-14 13:19:00,300 INFO L125 PetriNetUnfolderBase]: For 1370007/1370007 co-relation queries the response was YES. [2024-06-14 13:19:00,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60887 conditions, 5082 events. 3273/5082 cut-off events. For 1370007/1370007 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28822 event pairs, 1280 based on Foata normal form. 10/5092 useless extension candidates. Maximal degree in co-relation 60669. Up to 4732 conditions per place. [2024-06-14 13:19:00,391 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 569 selfloop transitions, 110 changer transitions 0/683 dead transitions. [2024-06-14 13:19:00,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 683 transitions, 12403 flow [2024-06-14 13:19:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:19:00,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-14 13:19:00,393 INFO L175 Difference]: Start difference. First operand has 450 places, 643 transitions, 10519 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:19:00,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 683 transitions, 12403 flow [2024-06-14 13:19:06,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 683 transitions, 12234 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:06,184 INFO L231 Difference]: Finished difference. Result has 455 places, 644 transitions, 10602 flow [2024-06-14 13:19:06,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10352, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10602, PETRI_PLACES=455, PETRI_TRANSITIONS=644} [2024-06-14 13:19:06,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-14 13:19:06,185 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 644 transitions, 10602 flow [2024-06-14 13:19:06,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:19:06,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:06,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:06,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:19:06,185 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:06,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1750161059, now seen corresponding path program 3 times [2024-06-14 13:19:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:06,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969891807] [2024-06-14 13:19:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:06,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:09,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:09,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969891807] [2024-06-14 13:19:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969891807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:09,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:09,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:19:09,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367556706] [2024-06-14 13:19:09,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:09,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:19:09,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:19:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:19:09,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:19:09,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 644 transitions, 10602 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:19:09,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:09,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:19:09,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:11,966 INFO L124 PetriNetUnfolderBase]: 3301/5124 cut-off events. [2024-06-14 13:19:11,966 INFO L125 PetriNetUnfolderBase]: For 1376181/1376181 co-relation queries the response was YES. [2024-06-14 13:19:12,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61562 conditions, 5124 events. 3301/5124 cut-off events. For 1376181/1376181 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 29134 event pairs, 1278 based on Foata normal form. 8/5132 useless extension candidates. Maximal degree in co-relation 61342. Up to 4738 conditions per place. [2024-06-14 13:19:12,051 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 574 selfloop transitions, 112 changer transitions 0/690 dead transitions. [2024-06-14 13:19:12,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 690 transitions, 12596 flow [2024-06-14 13:19:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:19:12,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 13:19:12,052 INFO L175 Difference]: Start difference. First operand has 455 places, 644 transitions, 10602 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:19:12,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 690 transitions, 12596 flow [2024-06-14 13:19:17,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 690 transitions, 12375 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:19:17,575 INFO L231 Difference]: Finished difference. Result has 458 places, 647 transitions, 10674 flow [2024-06-14 13:19:17,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10381, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10674, PETRI_PLACES=458, PETRI_TRANSITIONS=647} [2024-06-14 13:19:17,575 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-14 13:19:17,575 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 647 transitions, 10674 flow [2024-06-14 13:19:17,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:19:17,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:17,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:17,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:19:17,576 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:17,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1836852869, now seen corresponding path program 4 times [2024-06-14 13:19:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:17,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421886605] [2024-06-14 13:19:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:17,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:22,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:22,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421886605] [2024-06-14 13:19:22,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421886605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:22,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:22,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:19:22,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221442120] [2024-06-14 13:19:22,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:22,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:19:22,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:19:22,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:19:22,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:19:22,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 647 transitions, 10674 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:19:22,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:22,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:19:22,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:24,566 INFO L124 PetriNetUnfolderBase]: 3362/5219 cut-off events. [2024-06-14 13:19:24,566 INFO L125 PetriNetUnfolderBase]: For 1442302/1442302 co-relation queries the response was YES. [2024-06-14 13:19:24,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63292 conditions, 5219 events. 3362/5219 cut-off events. For 1442302/1442302 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 29773 event pairs, 1298 based on Foata normal form. 8/5227 useless extension candidates. Maximal degree in co-relation 63070. Up to 4897 conditions per place. [2024-06-14 13:19:24,663 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 618 selfloop transitions, 69 changer transitions 0/691 dead transitions. [2024-06-14 13:19:24,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 691 transitions, 12674 flow [2024-06-14 13:19:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-14 13:19:24,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3744186046511628 [2024-06-14 13:19:24,665 INFO L175 Difference]: Start difference. First operand has 458 places, 647 transitions, 10674 flow. Second operand 10 states and 161 transitions. [2024-06-14 13:19:24,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 691 transitions, 12674 flow [2024-06-14 13:19:31,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 691 transitions, 12523 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:31,145 INFO L231 Difference]: Finished difference. Result has 464 places, 652 transitions, 10753 flow [2024-06-14 13:19:31,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10523, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10753, PETRI_PLACES=464, PETRI_TRANSITIONS=652} [2024-06-14 13:19:31,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2024-06-14 13:19:31,145 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 652 transitions, 10753 flow [2024-06-14 13:19:31,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:19:31,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:31,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:31,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:19:31,146 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:31,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1836856589, now seen corresponding path program 5 times [2024-06-14 13:19:31,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:31,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313600183] [2024-06-14 13:19:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:31,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:35,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:35,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313600183] [2024-06-14 13:19:35,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313600183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:35,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:35,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:19:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411562744] [2024-06-14 13:19:35,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:35,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:19:35,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:19:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:19:35,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:19:35,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 652 transitions, 10753 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:19:35,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:35,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:19:35,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:38,346 INFO L124 PetriNetUnfolderBase]: 3367/5228 cut-off events. [2024-06-14 13:19:38,346 INFO L125 PetriNetUnfolderBase]: For 1461467/1461467 co-relation queries the response was YES. [2024-06-14 13:19:38,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62496 conditions, 5228 events. 3367/5228 cut-off events. For 1461467/1461467 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 29862 event pairs, 1303 based on Foata normal form. 18/5246 useless extension candidates. Maximal degree in co-relation 62270. Up to 4939 conditions per place. [2024-06-14 13:19:38,436 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 616 selfloop transitions, 70 changer transitions 0/690 dead transitions. [2024-06-14 13:19:38,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 690 transitions, 12473 flow [2024-06-14 13:19:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:19:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:19:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-14 13:19:38,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35306553911205074 [2024-06-14 13:19:38,437 INFO L175 Difference]: Start difference. First operand has 464 places, 652 transitions, 10753 flow. Second operand 11 states and 167 transitions. [2024-06-14 13:19:38,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 690 transitions, 12473 flow [2024-06-14 13:19:44,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 690 transitions, 12404 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:44,847 INFO L231 Difference]: Finished difference. Result has 471 places, 654 transitions, 10888 flow [2024-06-14 13:19:44,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10692, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10888, PETRI_PLACES=471, PETRI_TRANSITIONS=654} [2024-06-14 13:19:44,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-14 13:19:44,852 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 654 transitions, 10888 flow [2024-06-14 13:19:44,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:19:44,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:44,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:44,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:19:44,852 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:44,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:44,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1116059713, now seen corresponding path program 6 times [2024-06-14 13:19:44,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:44,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712056475] [2024-06-14 13:19:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:44,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:48,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:48,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712056475] [2024-06-14 13:19:48,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712056475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:48,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:48,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:19:48,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561307422] [2024-06-14 13:19:48,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:48,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:19:48,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:48,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:19:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:19:48,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:19:48,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 654 transitions, 10888 flow. Second operand has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:19:48,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:48,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:19:48,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:50,846 INFO L124 PetriNetUnfolderBase]: 3431/5330 cut-off events. [2024-06-14 13:19:50,846 INFO L125 PetriNetUnfolderBase]: For 1487368/1487368 co-relation queries the response was YES. [2024-06-14 13:19:50,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63671 conditions, 5330 events. 3431/5330 cut-off events. For 1487368/1487368 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30584 event pairs, 1320 based on Foata normal form. 18/5348 useless extension candidates. Maximal degree in co-relation 63444. Up to 5068 conditions per place. [2024-06-14 13:19:50,937 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 624 selfloop transitions, 55 changer transitions 0/683 dead transitions. [2024-06-14 13:19:50,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 683 transitions, 12530 flow [2024-06-14 13:19:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-14 13:19:50,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 13:19:50,938 INFO L175 Difference]: Start difference. First operand has 471 places, 654 transitions, 10888 flow. Second operand 10 states and 155 transitions. [2024-06-14 13:19:50,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 683 transitions, 12530 flow [2024-06-14 13:19:57,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 683 transitions, 12378 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:19:57,041 INFO L231 Difference]: Finished difference. Result has 472 places, 656 transitions, 10912 flow [2024-06-14 13:19:57,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10736, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10912, PETRI_PLACES=472, PETRI_TRANSITIONS=656} [2024-06-14 13:19:57,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 428 predicate places. [2024-06-14 13:19:57,042 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 656 transitions, 10912 flow [2024-06-14 13:19:57,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.818181818181818) internal successors, (97), 11 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) [2024-06-14 13:19:57,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:57,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:57,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:19:57,042 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:57,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1115911843, now seen corresponding path program 7 times [2024-06-14 13:19:57,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:57,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117265626] [2024-06-14 13:19:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:57,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15