./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix040_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix040_tso.oepc.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/mix040_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix040_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:29:16,639 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:29:16,691 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:29:16,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:29:16,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:29:16,718 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:29:16,719 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:29:16,719 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:29:16,720 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:29:16,723 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:29:16,723 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:29:16,723 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:29:16,724 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:29:16,725 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:29:16,725 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:29:16,725 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:29:16,725 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:29:16,725 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:29:16,726 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:29:16,726 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:29:16,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:29:16,726 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:29:16,726 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:29:16,727 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:29:16,727 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:29:16,727 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:29:16,727 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:29:16,727 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:29:16,728 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:29:16,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:29:16,729 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:29:16,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:29:16,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:29:16,729 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:29:16,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:29:16,730 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:29:16,730 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:29:16,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:29:16,730 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:29:16,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:29:16,730 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:29:16,731 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:29:16,731 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:29:16,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:29:16,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:29:16,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:29:16,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:29:16,938 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:29:16,939 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:29:16,940 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix040_tso.oepc.yml/witness.yml [2024-06-14 12:29:17,158 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:29:17,164 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:29:17,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix040_tso.oepc.i [2024-06-14 12:29:18,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:29:18,341 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:29:18,342 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix040_tso.oepc.i [2024-06-14 12:29:18,357 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c054740a/0ecdaad2b53845e389d27aa1df173cb0/FLAG9dd1d2d59 [2024-06-14 12:29:18,374 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c054740a/0ecdaad2b53845e389d27aa1df173cb0 [2024-06-14 12:29:18,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:29:18,376 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:29:18,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:29:18,379 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:29:18,382 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:29:18,383 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:29:17" (1/2) ... [2024-06-14 12:29:18,384 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56223d64 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:29:18, skipping insertion in model container [2024-06-14 12:29:18,384 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:29:17" (1/2) ... [2024-06-14 12:29:18,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b22de60 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:29:18, skipping insertion in model container [2024-06-14 12:29:18,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:29:18" (2/2) ... [2024-06-14 12:29:18,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56223d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:18, skipping insertion in model container [2024-06-14 12:29:18,389 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:29:18" (2/2) ... [2024-06-14 12:29:18,390 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:29:18,490 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:29:18,491 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) [2024-06-14 12:29:18,491 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) [2024-06-14 12:29:18,491 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) [2024-06-14 12:29:18,491 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) [2024-06-14 12:29:18,491 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:29:18,491 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-14 12:29:18,529 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:29:18,905 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:29:18,913 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:29:19,041 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:29:19,070 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:29:19,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19 WrapperNode [2024-06-14 12:29:19,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:29:19,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:29:19,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:29:19,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:29:19,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,094 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,127 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 158 [2024-06-14 12:29:19,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:29:19,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:29:19,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:29:19,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:29:19,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,141 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,160 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:29:19,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,194 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:29:19,204 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:29:19,205 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:29:19,205 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:29:19,206 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (1/1) ... [2024-06-14 12:29:19,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:29:19,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:29:19,229 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 12:29:19,237 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 12:29:19,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:29:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:29:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:29:19,265 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:29:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:29:19,265 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:29:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:29:19,265 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:29:19,265 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:29:19,266 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:29:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:29:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:29:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:29:19,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:29:19,268 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 12:29:19,402 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:29:19,404 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:29:19,804 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:29:19,804 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:29:19,956 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:29:19,956 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:29:19,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:29:19 BoogieIcfgContainer [2024-06-14 12:29:19,957 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:29:19,959 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:29:19,959 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:29:19,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:29:19,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:29:17" (1/4) ... [2024-06-14 12:29:19,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4e07b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:29:19, skipping insertion in model container [2024-06-14 12:29:19,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:29:18" (2/4) ... [2024-06-14 12:29:19,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4e07b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:29:19, skipping insertion in model container [2024-06-14 12:29:19,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:29:19" (3/4) ... [2024-06-14 12:29:19,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4e07b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:29:19, skipping insertion in model container [2024-06-14 12:29:19,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:29:19" (4/4) ... [2024-06-14 12:29:19,964 INFO L112 eAbstractionObserver]: Analyzing ICFG mix040_tso.oepc.i [2024-06-14 12:29:19,977 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:29:19,977 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:29:19,978 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:29:20,036 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:29:20,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:29:20,090 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 12:29:20,090 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:29:20,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:29:20,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:29:20,096 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 12:29:20,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:29:20,114 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;@45ff8e72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:29:20,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:29:20,119 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:29:20,119 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:29:20,119 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:29:20,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:20,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:29:20,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:20,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -654485096, now seen corresponding path program 1 times [2024-06-14 12:29:20,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:20,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200985145] [2024-06-14 12:29:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:20,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:21,252 INFO 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 12:29:21,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:21,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200985145] [2024-06-14 12:29:21,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200985145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:21,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:21,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:29:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835955702] [2024-06-14 12:29:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:21,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:29:21,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:29:21,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:29:21,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:29:21,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:21,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:21,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:29:21,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:22,908 INFO L124 PetriNetUnfolderBase]: 9583/13642 cut-off events. [2024-06-14 12:29:22,908 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2024-06-14 12:29:22,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27042 conditions, 13642 events. 9583/13642 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 77505 event pairs, 7347 based on Foata normal form. 1/13248 useless extension candidates. Maximal degree in co-relation 27026. Up to 13009 conditions per place. [2024-06-14 12:29:22,995 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 12:29:22,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 237 flow [2024-06-14 12:29:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:29:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:29:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-14 12:29:23,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-14 12:29:23,007 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 96 transitions. [2024-06-14 12:29:23,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 237 flow [2024-06-14 12:29:23,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:23,014 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 12:29:23,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-14 12:29:23,018 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 12:29:23,019 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 12:29:23,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:23,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:23,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:23,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:29:23,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:23,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:23,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1894930249, now seen corresponding path program 1 times [2024-06-14 12:29:23,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:23,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255752804] [2024-06-14 12:29:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:23,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:23,877 INFO 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 12:29:23,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:23,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255752804] [2024-06-14 12:29:23,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255752804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:23,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:29:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465286193] [2024-06-14 12:29:23,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:23,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:29:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:29:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:29:23,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:29:23,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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 12:29:23,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:23,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:29:23,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:25,476 INFO L124 PetriNetUnfolderBase]: 10968/15233 cut-off events. [2024-06-14 12:29:25,476 INFO L125 PetriNetUnfolderBase]: For 2797/2797 co-relation queries the response was YES. [2024-06-14 12:29:25,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34323 conditions, 15233 events. 10968/15233 cut-off events. For 2797/2797 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 83557 event pairs, 7575 based on Foata normal form. 4/15055 useless extension candidates. Maximal degree in co-relation 34308. Up to 14819 conditions per place. [2024-06-14 12:29:25,570 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 56 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 12:29:25,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 331 flow [2024-06-14 12:29:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:29:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:29:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-14 12:29:25,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-06-14 12:29:25,572 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 121 transitions. [2024-06-14 12:29:25,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 331 flow [2024-06-14 12:29:25,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:29:25,574 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 12:29:25,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-14 12:29:25,575 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 12:29:25,575 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 12:29:25,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 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 12:29:25,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:25,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:25,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:29:25,576 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:25,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1386705167, now seen corresponding path program 1 times [2024-06-14 12:29:25,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:25,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294554921] [2024-06-14 12:29:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:25,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:26,373 INFO 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 12:29:26,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:26,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294554921] [2024-06-14 12:29:26,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294554921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:26,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:26,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:29:26,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874801627] [2024-06-14 12:29:26,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:26,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:29:26,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:29:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:29:26,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:29:26,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 12:29:26,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:26,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:29:26,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:28,112 INFO L124 PetriNetUnfolderBase]: 10986/15293 cut-off events. [2024-06-14 12:29:28,113 INFO L125 PetriNetUnfolderBase]: For 8172/8172 co-relation queries the response was YES. [2024-06-14 12:29:28,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38259 conditions, 15293 events. 10986/15293 cut-off events. For 8172/8172 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 84227 event pairs, 6069 based on Foata normal form. 7/15132 useless extension candidates. Maximal degree in co-relation 38242. Up to 14740 conditions per place. [2024-06-14 12:29:28,191 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-14 12:29:28,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 547 flow [2024-06-14 12:29:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:29:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:29:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-14 12:29:28,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851851851851851 [2024-06-14 12:29:28,196 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 158 transitions. [2024-06-14 12:29:28,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 547 flow [2024-06-14 12:29:28,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 528 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:29:28,201 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-14 12:29:28,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-14 12:29:28,202 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-14 12:29:28,203 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-14 12:29:28,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 12:29:28,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:28,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:28,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:29:28,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:28,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:28,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2042108378, now seen corresponding path program 1 times [2024-06-14 12:29:28,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:28,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107476177] [2024-06-14 12:29:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:28,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:29,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:29,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107476177] [2024-06-14 12:29:29,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107476177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:29,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:29,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:29:29,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434180888] [2024-06-14 12:29:29,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:29,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:29:29,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:29:29,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:29:29,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:29:29,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:29,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:29,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:29:29,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:30,694 INFO L124 PetriNetUnfolderBase]: 11015/15337 cut-off events. [2024-06-14 12:29:30,694 INFO L125 PetriNetUnfolderBase]: For 19460/19465 co-relation queries the response was YES. [2024-06-14 12:29:30,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44546 conditions, 15337 events. 11015/15337 cut-off events. For 19460/19465 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 84772 event pairs, 5024 based on Foata normal form. 18/15187 useless extension candidates. Maximal degree in co-relation 44526. Up to 14705 conditions per place. [2024-06-14 12:29:30,768 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 81 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-14 12:29:30,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 692 flow [2024-06-14 12:29:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:29:30,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:29:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-14 12:29:30,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-06-14 12:29:30,770 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 182 transitions. [2024-06-14 12:29:30,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 692 flow [2024-06-14 12:29:30,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 680 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 12:29:30,776 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 391 flow [2024-06-14 12:29:30,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-14 12:29:30,777 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2024-06-14 12:29:30,777 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 391 flow [2024-06-14 12:29:30,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:30,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:30,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:30,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:29:30,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:30,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:30,778 INFO L85 PathProgramCache]: Analyzing trace with hash 978928171, now seen corresponding path program 1 times [2024-06-14 12:29:30,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:30,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506126248] [2024-06-14 12:29:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:30,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:31,561 INFO 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 12:29:31,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:31,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506126248] [2024-06-14 12:29:31,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506126248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:31,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:31,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:29:31,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72103972] [2024-06-14 12:29:31,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:31,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:29:31,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:29:31,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:29:31,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:29:31,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:31,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:31,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:29:31,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:33,192 INFO L124 PetriNetUnfolderBase]: 9611/13708 cut-off events. [2024-06-14 12:29:33,192 INFO L125 PetriNetUnfolderBase]: For 25303/25303 co-relation queries the response was YES. [2024-06-14 12:29:33,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42976 conditions, 13708 events. 9611/13708 cut-off events. For 25303/25303 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 78285 event pairs, 5145 based on Foata normal form. 3/13507 useless extension candidates. Maximal degree in co-relation 42953. Up to 13036 conditions per place. [2024-06-14 12:29:33,284 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 68 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-14 12:29:33,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 591 flow [2024-06-14 12:29:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:29:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:29:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 12:29:33,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-14 12:29:33,286 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 391 flow. Second operand 5 states and 128 transitions. [2024-06-14 12:29:33,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 591 flow [2024-06-14 12:29:33,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 522 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:33,300 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 353 flow [2024-06-14 12:29:33,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-14 12:29:33,306 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-14 12:29:33,307 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 353 flow [2024-06-14 12:29:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:33,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:33,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:33,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:29:33,308 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:33,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash 230310817, now seen corresponding path program 1 times [2024-06-14 12:29:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:33,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454457341] [2024-06-14 12:29:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:34,230 INFO 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 12:29:34,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:34,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454457341] [2024-06-14 12:29:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454457341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:34,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:29:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620281210] [2024-06-14 12:29:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:34,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:29:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:29:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:29:34,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:29:34,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:34,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:34,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:29:34,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:35,868 INFO L124 PetriNetUnfolderBase]: 9593/13722 cut-off events. [2024-06-14 12:29:35,868 INFO L125 PetriNetUnfolderBase]: For 29358/29358 co-relation queries the response was YES. [2024-06-14 12:29:35,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43626 conditions, 13722 events. 9593/13722 cut-off events. For 29358/29358 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 78175 event pairs, 4885 based on Foata normal form. 6/13518 useless extension candidates. Maximal degree in co-relation 43601. Up to 12982 conditions per place. [2024-06-14 12:29:35,968 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 76 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-06-14 12:29:35,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 625 flow [2024-06-14 12:29:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:29:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:29:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 12:29:35,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:29:35,972 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 353 flow. Second operand 6 states and 153 transitions. [2024-06-14 12:29:35,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 625 flow [2024-06-14 12:29:35,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 596 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:35,987 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 399 flow [2024-06-14 12:29:35,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-14 12:29:35,987 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-14 12:29:35,988 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 399 flow [2024-06-14 12:29:35,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:35,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:35,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:35,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:29:35,989 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:35,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:35,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1456020312, now seen corresponding path program 1 times [2024-06-14 12:29:35,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:35,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882639152] [2024-06-14 12:29:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:35,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:36,928 INFO 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 12:29:36,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:36,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882639152] [2024-06-14 12:29:36,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882639152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:36,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:36,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:29:36,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163714608] [2024-06-14 12:29:36,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:36,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:29:36,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:29:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:29:37,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:29:37,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 399 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:37,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:37,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:29:37,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:38,737 INFO L124 PetriNetUnfolderBase]: 11001/15341 cut-off events. [2024-06-14 12:29:38,737 INFO L125 PetriNetUnfolderBase]: For 45801/45811 co-relation queries the response was YES. [2024-06-14 12:29:38,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52887 conditions, 15341 events. 11001/15341 cut-off events. For 45801/45811 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 84622 event pairs, 5793 based on Foata normal form. 14/15172 useless extension candidates. Maximal degree in co-relation 52862. Up to 14759 conditions per place. [2024-06-14 12:29:38,829 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 75 selfloop transitions, 25 changer transitions 0/107 dead transitions. [2024-06-14 12:29:38,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 742 flow [2024-06-14 12:29:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:29:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:29:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 12:29:38,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2024-06-14 12:29:38,831 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 399 flow. Second operand 6 states and 157 transitions. [2024-06-14 12:29:38,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 742 flow [2024-06-14 12:29:38,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 699 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:38,844 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 452 flow [2024-06-14 12:29:38,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 12:29:38,844 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-14 12:29:38,845 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 452 flow [2024-06-14 12:29:38,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:38,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:38,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:38,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:29:38,845 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:38,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash 153592998, now seen corresponding path program 2 times [2024-06-14 12:29:38,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:38,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445151315] [2024-06-14 12:29:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:38,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:39,685 INFO 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 12:29:39,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:39,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445151315] [2024-06-14 12:29:39,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445151315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:39,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:39,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:29:39,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823062472] [2024-06-14 12:29:39,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:39,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:29:39,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:39,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:29:39,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:29:39,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:29:39,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 452 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:39,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:39,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:29:39,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:41,467 INFO L124 PetriNetUnfolderBase]: 10977/15293 cut-off events. [2024-06-14 12:29:41,467 INFO L125 PetriNetUnfolderBase]: For 53572/53572 co-relation queries the response was YES. [2024-06-14 12:29:41,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53979 conditions, 15293 events. 10977/15293 cut-off events. For 53572/53572 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 84291 event pairs, 5813 based on Foata normal form. 3/15108 useless extension candidates. Maximal degree in co-relation 53953. Up to 14729 conditions per place. [2024-06-14 12:29:41,549 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 68 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-14 12:29:41,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 702 flow [2024-06-14 12:29:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:29:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:29:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 12:29:41,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-14 12:29:41,551 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 452 flow. Second operand 6 states and 152 transitions. [2024-06-14 12:29:41,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 702 flow [2024-06-14 12:29:41,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 659 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:29:41,566 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 472 flow [2024-06-14 12:29:41,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2024-06-14 12:29:41,567 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-14 12:29:41,567 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 472 flow [2024-06-14 12:29:41,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:41,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:41,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:41,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:29:41,568 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:41,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash -490120414, now seen corresponding path program 1 times [2024-06-14 12:29:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:41,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905364583] [2024-06-14 12:29:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:41,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:42,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:42,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905364583] [2024-06-14 12:29:42,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905364583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:42,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:42,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:42,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751726641] [2024-06-14 12:29:42,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:42,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:42,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:42,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:42,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:42,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:29:42,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 472 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:42,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:42,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:29:42,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:44,336 INFO L124 PetriNetUnfolderBase]: 11343/15765 cut-off events. [2024-06-14 12:29:44,336 INFO L125 PetriNetUnfolderBase]: For 65550/65558 co-relation queries the response was YES. [2024-06-14 12:29:44,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57491 conditions, 15765 events. 11343/15765 cut-off events. For 65550/65558 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 86458 event pairs, 5128 based on Foata normal form. 15/15605 useless extension candidates. Maximal degree in co-relation 57464. Up to 14795 conditions per place. [2024-06-14 12:29:44,418 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 105 selfloop transitions, 55 changer transitions 0/167 dead transitions. [2024-06-14 12:29:44,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 167 transitions, 1352 flow [2024-06-14 12:29:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:29:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:29:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-14 12:29:44,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2024-06-14 12:29:44,419 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 472 flow. Second operand 8 states and 217 transitions. [2024-06-14 12:29:44,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 167 transitions, 1352 flow [2024-06-14 12:29:44,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 167 transitions, 1189 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:29:44,444 INFO L231 Difference]: Finished difference. Result has 82 places, 110 transitions, 793 flow [2024-06-14 12:29:44,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=793, PETRI_PLACES=82, PETRI_TRANSITIONS=110} [2024-06-14 12:29:44,444 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-14 12:29:44,445 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 110 transitions, 793 flow [2024-06-14 12:29:44,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:44,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:44,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:44,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:29:44,445 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:44,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2108011362, now seen corresponding path program 2 times [2024-06-14 12:29:44,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:44,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676115124] [2024-06-14 12:29:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:45,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:45,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676115124] [2024-06-14 12:29:45,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676115124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:45,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:45,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:45,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019163735] [2024-06-14 12:29:45,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:45,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:45,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:45,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:45,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:45,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:29:45,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 110 transitions, 793 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:45,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:45,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:29:45,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:47,458 INFO L124 PetriNetUnfolderBase]: 11503/15975 cut-off events. [2024-06-14 12:29:47,459 INFO L125 PetriNetUnfolderBase]: For 86222/86233 co-relation queries the response was YES. [2024-06-14 12:29:47,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63796 conditions, 15975 events. 11503/15975 cut-off events. For 86222/86233 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 87356 event pairs, 5168 based on Foata normal form. 26/15826 useless extension candidates. Maximal degree in co-relation 63765. Up to 14907 conditions per place. [2024-06-14 12:29:47,539 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 91 selfloop transitions, 65 changer transitions 0/163 dead transitions. [2024-06-14 12:29:47,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 163 transitions, 1403 flow [2024-06-14 12:29:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 12:29:47,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-14 12:29:47,540 INFO L175 Difference]: Start difference. First operand has 82 places, 110 transitions, 793 flow. Second operand 7 states and 186 transitions. [2024-06-14 12:29:47,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 163 transitions, 1403 flow [2024-06-14 12:29:47,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 163 transitions, 1362 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 12:29:47,586 INFO L231 Difference]: Finished difference. Result has 87 places, 119 transitions, 1002 flow [2024-06-14 12:29:47,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1002, PETRI_PLACES=87, PETRI_TRANSITIONS=119} [2024-06-14 12:29:47,586 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-14 12:29:47,587 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 119 transitions, 1002 flow [2024-06-14 12:29:47,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:47,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:47,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:47,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:29:47,587 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:47,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash 421729920, now seen corresponding path program 3 times [2024-06-14 12:29:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:47,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914428441] [2024-06-14 12:29:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:47,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:48,452 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 12:29:48,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:48,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914428441] [2024-06-14 12:29:48,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914428441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:48,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:48,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188769020] [2024-06-14 12:29:48,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:48,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:48,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:48,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:48,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:29:48,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 119 transitions, 1002 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:48,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:48,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:29:48,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:50,637 INFO L124 PetriNetUnfolderBase]: 11583/16100 cut-off events. [2024-06-14 12:29:50,637 INFO L125 PetriNetUnfolderBase]: For 101707/101711 co-relation queries the response was YES. [2024-06-14 12:29:50,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67145 conditions, 16100 events. 11583/16100 cut-off events. For 101707/101711 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 87999 event pairs, 5165 based on Foata normal form. 12/15926 useless extension candidates. Maximal degree in co-relation 67112. Up to 14949 conditions per place. [2024-06-14 12:29:50,737 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 92 selfloop transitions, 79 changer transitions 0/178 dead transitions. [2024-06-14 12:29:50,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 178 transitions, 1802 flow [2024-06-14 12:29:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 12:29:50,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-14 12:29:50,739 INFO L175 Difference]: Start difference. First operand has 87 places, 119 transitions, 1002 flow. Second operand 7 states and 188 transitions. [2024-06-14 12:29:50,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 178 transitions, 1802 flow [2024-06-14 12:29:50,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 178 transitions, 1633 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:29:50,815 INFO L231 Difference]: Finished difference. Result has 90 places, 133 transitions, 1211 flow [2024-06-14 12:29:50,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1211, PETRI_PLACES=90, PETRI_TRANSITIONS=133} [2024-06-14 12:29:50,816 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2024-06-14 12:29:50,816 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 133 transitions, 1211 flow [2024-06-14 12:29:50,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:50,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:50,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:50,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:29:50,817 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:50,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:50,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2009817904, now seen corresponding path program 4 times [2024-06-14 12:29:50,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:50,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938901665] [2024-06-14 12:29:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:50,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:29:51,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:51,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938901665] [2024-06-14 12:29:51,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938901665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:51,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:51,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:29:51,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578378886] [2024-06-14 12:29:51,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:51,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:29:51,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:51,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:29:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:29:51,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:29:51,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 133 transitions, 1211 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:51,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:51,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:29:51,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:53,698 INFO L124 PetriNetUnfolderBase]: 11551/16044 cut-off events. [2024-06-14 12:29:53,698 INFO L125 PetriNetUnfolderBase]: For 102176/102186 co-relation queries the response was YES. [2024-06-14 12:29:53,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66596 conditions, 16044 events. 11551/16044 cut-off events. For 102176/102186 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 87667 event pairs, 5147 based on Foata normal form. 18/15877 useless extension candidates. Maximal degree in co-relation 66562. Up to 14932 conditions per place. [2024-06-14 12:29:53,814 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 87 selfloop transitions, 81 changer transitions 0/175 dead transitions. [2024-06-14 12:29:53,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 175 transitions, 1749 flow [2024-06-14 12:29:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:29:53,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-14 12:29:53,825 INFO L175 Difference]: Start difference. First operand has 90 places, 133 transitions, 1211 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:29:53,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 175 transitions, 1749 flow [2024-06-14 12:29:53,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 175 transitions, 1618 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-14 12:29:53,922 INFO L231 Difference]: Finished difference. Result has 95 places, 133 transitions, 1256 flow [2024-06-14 12:29:53,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1256, PETRI_PLACES=95, PETRI_TRANSITIONS=133} [2024-06-14 12:29:53,923 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-14 12:29:53,923 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 133 transitions, 1256 flow [2024-06-14 12:29:53,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:53,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:53,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:53,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:29:53,924 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:53,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:53,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2009578336, now seen corresponding path program 1 times [2024-06-14 12:29:53,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:53,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107883749] [2024-06-14 12:29:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:53,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:55,212 INFO 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 12:29:55,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:55,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107883749] [2024-06-14 12:29:55,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107883749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:55,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:55,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:29:55,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308220035] [2024-06-14 12:29:55,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:55,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:29:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:29:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:29:55,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:29:55,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 133 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:55,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:55,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:29:55,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:57,076 INFO L124 PetriNetUnfolderBase]: 10141/14349 cut-off events. [2024-06-14 12:29:57,076 INFO L125 PetriNetUnfolderBase]: For 97629/97631 co-relation queries the response was YES. [2024-06-14 12:29:57,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60300 conditions, 14349 events. 10141/14349 cut-off events. For 97629/97631 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 80754 event pairs, 4559 based on Foata normal form. 6/14201 useless extension candidates. Maximal degree in co-relation 60263. Up to 13691 conditions per place. [2024-06-14 12:29:57,186 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 144 selfloop transitions, 17 changer transitions 0/169 dead transitions. [2024-06-14 12:29:57,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 169 transitions, 1716 flow [2024-06-14 12:29:57,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:29:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:29:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:29:57,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-14 12:29:57,188 INFO L175 Difference]: Start difference. First operand has 95 places, 133 transitions, 1256 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:29:57,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 169 transitions, 1716 flow [2024-06-14 12:29:57,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 169 transitions, 1509 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:29:57,270 INFO L231 Difference]: Finished difference. Result has 95 places, 136 transitions, 1135 flow [2024-06-14 12:29:57,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1049, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1135, PETRI_PLACES=95, PETRI_TRANSITIONS=136} [2024-06-14 12:29:57,271 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-14 12:29:57,271 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 136 transitions, 1135 flow [2024-06-14 12:29:57,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:57,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:57,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:57,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:29:57,272 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:57,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2050906931, now seen corresponding path program 1 times [2024-06-14 12:29:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:57,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184920621] [2024-06-14 12:29:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:57,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:29:58,213 INFO 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 12:29:58,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:29:58,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184920621] [2024-06-14 12:29:58,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184920621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:29:58,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:29:58,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:29:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160333224] [2024-06-14 12:29:58,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:29:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:29:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:29:58,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:29:58,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:29:58,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:29:58,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 136 transitions, 1135 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:58,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:29:58,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:29:58,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:29:59,787 INFO L124 PetriNetUnfolderBase]: 10134/14839 cut-off events. [2024-06-14 12:29:59,787 INFO L125 PetriNetUnfolderBase]: For 111430/111432 co-relation queries the response was YES. [2024-06-14 12:29:59,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62411 conditions, 14839 events. 10134/14839 cut-off events. For 111430/111432 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 87894 event pairs, 4747 based on Foata normal form. 2/14822 useless extension candidates. Maximal degree in co-relation 62374. Up to 13748 conditions per place. [2024-06-14 12:29:59,894 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 136 selfloop transitions, 10 changer transitions 0/154 dead transitions. [2024-06-14 12:29:59,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 154 transitions, 1509 flow [2024-06-14 12:29:59,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:29:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:29:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 12:29:59,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-14 12:29:59,895 INFO L175 Difference]: Start difference. First operand has 95 places, 136 transitions, 1135 flow. Second operand 5 states and 124 transitions. [2024-06-14 12:29:59,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 154 transitions, 1509 flow [2024-06-14 12:29:59,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 154 transitions, 1449 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:29:59,985 INFO L231 Difference]: Finished difference. Result has 95 places, 140 transitions, 1150 flow [2024-06-14 12:29:59,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1150, PETRI_PLACES=95, PETRI_TRANSITIONS=140} [2024-06-14 12:29:59,986 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-14 12:29:59,986 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 140 transitions, 1150 flow [2024-06-14 12:29:59,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:29:59,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:29:59,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:29:59,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:29:59,986 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:29:59,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:29:59,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2107366568, now seen corresponding path program 1 times [2024-06-14 12:29:59,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:29:59,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171065011] [2024-06-14 12:29:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:29:59,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:29:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:00,888 INFO 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 12:30:00,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:00,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171065011] [2024-06-14 12:30:00,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171065011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:00,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:00,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:00,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848144346] [2024-06-14 12:30:00,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:00,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:00,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:00,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:00,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:00,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:00,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 140 transitions, 1150 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:00,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:00,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:00,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:03,068 INFO L124 PetriNetUnfolderBase]: 11617/16411 cut-off events. [2024-06-14 12:30:03,068 INFO L125 PetriNetUnfolderBase]: For 149937/149958 co-relation queries the response was YES. [2024-06-14 12:30:03,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73652 conditions, 16411 events. 11617/16411 cut-off events. For 149937/149958 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 92138 event pairs, 5121 based on Foata normal form. 30/16421 useless extension candidates. Maximal degree in co-relation 73614. Up to 14978 conditions per place. [2024-06-14 12:30:03,208 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 102 selfloop transitions, 86 changer transitions 0/195 dead transitions. [2024-06-14 12:30:03,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 195 transitions, 1868 flow [2024-06-14 12:30:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:03,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 12:30:03,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-14 12:30:03,210 INFO L175 Difference]: Start difference. First operand has 95 places, 140 transitions, 1150 flow. Second operand 7 states and 190 transitions. [2024-06-14 12:30:03,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 195 transitions, 1868 flow [2024-06-14 12:30:03,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 195 transitions, 1823 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:03,306 INFO L231 Difference]: Finished difference. Result has 99 places, 148 transitions, 1404 flow [2024-06-14 12:30:03,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1404, PETRI_PLACES=99, PETRI_TRANSITIONS=148} [2024-06-14 12:30:03,306 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-14 12:30:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 148 transitions, 1404 flow [2024-06-14 12:30:03,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:03,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:03,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:03,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:30:03,307 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:03,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2107372148, now seen corresponding path program 2 times [2024-06-14 12:30:03,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:03,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578083512] [2024-06-14 12:30:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:03,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:04,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:04,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578083512] [2024-06-14 12:30:04,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578083512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:04,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:04,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:04,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026312286] [2024-06-14 12:30:04,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:04,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:04,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:04,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:04,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:04,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:04,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 148 transitions, 1404 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:04,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:04,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:04,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:06,350 INFO L124 PetriNetUnfolderBase]: 11693/16517 cut-off events. [2024-06-14 12:30:06,350 INFO L125 PetriNetUnfolderBase]: For 169043/169066 co-relation queries the response was YES. [2024-06-14 12:30:06,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76337 conditions, 16517 events. 11693/16517 cut-off events. For 169043/169066 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 92713 event pairs, 5093 based on Foata normal form. 30/16527 useless extension candidates. Maximal degree in co-relation 76298. Up to 15045 conditions per place. [2024-06-14 12:30:06,468 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 103 selfloop transitions, 90 changer transitions 0/200 dead transitions. [2024-06-14 12:30:06,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 200 transitions, 2142 flow [2024-06-14 12:30:06,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 12:30:06,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-14 12:30:06,469 INFO L175 Difference]: Start difference. First operand has 99 places, 148 transitions, 1404 flow. Second operand 7 states and 186 transitions. [2024-06-14 12:30:06,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 200 transitions, 2142 flow [2024-06-14 12:30:06,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 200 transitions, 1838 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:06,566 INFO L231 Difference]: Finished difference. Result has 100 places, 156 transitions, 1425 flow [2024-06-14 12:30:06,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1425, PETRI_PLACES=100, PETRI_TRANSITIONS=156} [2024-06-14 12:30:06,566 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2024-06-14 12:30:06,566 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 156 transitions, 1425 flow [2024-06-14 12:30:06,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:06,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:06,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:06,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:30:06,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:06,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:06,567 INFO L85 PathProgramCache]: Analyzing trace with hash -622015230, now seen corresponding path program 3 times [2024-06-14 12:30:06,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:06,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041200003] [2024-06-14 12:30:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:06,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:07,453 INFO 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 12:30:07,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:07,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041200003] [2024-06-14 12:30:07,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041200003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:07,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:07,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:07,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926534484] [2024-06-14 12:30:07,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:07,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:07,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:07,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:07,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 156 transitions, 1425 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:07,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:07,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:07,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:09,748 INFO L124 PetriNetUnfolderBase]: 11661/16479 cut-off events. [2024-06-14 12:30:09,748 INFO L125 PetriNetUnfolderBase]: For 182158/182193 co-relation queries the response was YES. [2024-06-14 12:30:09,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76897 conditions, 16479 events. 11661/16479 cut-off events. For 182158/182193 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 92626 event pairs, 5117 based on Foata normal form. 42/16489 useless extension candidates. Maximal degree in co-relation 76858. Up to 15018 conditions per place. [2024-06-14 12:30:09,869 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 100 selfloop transitions, 87 changer transitions 0/194 dead transitions. [2024-06-14 12:30:09,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 194 transitions, 1931 flow [2024-06-14 12:30:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 12:30:09,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-14 12:30:09,871 INFO L175 Difference]: Start difference. First operand has 100 places, 156 transitions, 1425 flow. Second operand 7 states and 178 transitions. [2024-06-14 12:30:09,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 194 transitions, 1931 flow [2024-06-14 12:30:10,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 194 transitions, 1722 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:10,005 INFO L231 Difference]: Finished difference. Result has 103 places, 156 transitions, 1405 flow [2024-06-14 12:30:10,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1405, PETRI_PLACES=103, PETRI_TRANSITIONS=156} [2024-06-14 12:30:10,005 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-14 12:30:10,006 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 156 transitions, 1405 flow [2024-06-14 12:30:10,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:10,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:10,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:10,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:30:10,006 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:10,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:10,007 INFO L85 PathProgramCache]: Analyzing trace with hash -169053117, now seen corresponding path program 1 times [2024-06-14 12:30:10,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:10,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164916558] [2024-06-14 12:30:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:10,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:10,887 INFO 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 12:30:10,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:10,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164916558] [2024-06-14 12:30:10,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164916558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:10,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:10,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:10,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270681500] [2024-06-14 12:30:10,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:10,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:10,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:10,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:10,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 156 transitions, 1405 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:10,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:10,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:10,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:13,020 INFO L124 PetriNetUnfolderBase]: 11697/16509 cut-off events. [2024-06-14 12:30:13,020 INFO L125 PetriNetUnfolderBase]: For 199973/199992 co-relation queries the response was YES. [2024-06-14 12:30:13,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78114 conditions, 16509 events. 11697/16509 cut-off events. For 199973/199992 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 92706 event pairs, 4445 based on Foata normal form. 22/16499 useless extension candidates. Maximal degree in co-relation 78074. Up to 15432 conditions per place. [2024-06-14 12:30:13,116 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 149 selfloop transitions, 46 changer transitions 0/202 dead transitions. [2024-06-14 12:30:13,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 202 transitions, 2095 flow [2024-06-14 12:30:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:30:13,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 12:30:13,118 INFO L175 Difference]: Start difference. First operand has 103 places, 156 transitions, 1405 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:30:13,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 202 transitions, 2095 flow [2024-06-14 12:30:13,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 202 transitions, 1841 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:13,249 INFO L231 Difference]: Finished difference. Result has 103 places, 162 transitions, 1339 flow [2024-06-14 12:30:13,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1339, PETRI_PLACES=103, PETRI_TRANSITIONS=162} [2024-06-14 12:30:13,250 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-14 12:30:13,250 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 162 transitions, 1339 flow [2024-06-14 12:30:13,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:13,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:13,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:30:13,250 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:13,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1541094779, now seen corresponding path program 2 times [2024-06-14 12:30:13,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849255799] [2024-06-14 12:30:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:14,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:14,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849255799] [2024-06-14 12:30:14,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849255799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:14,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:14,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:14,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870695118] [2024-06-14 12:30:14,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:14,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:14,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:14,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:14,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:14,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 162 transitions, 1339 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:14,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:14,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:14,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:16,351 INFO L124 PetriNetUnfolderBase]: 11682/16487 cut-off events. [2024-06-14 12:30:16,351 INFO L125 PetriNetUnfolderBase]: For 223289/223300 co-relation queries the response was YES. [2024-06-14 12:30:16,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80109 conditions, 16487 events. 11682/16487 cut-off events. For 223289/223300 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 92466 event pairs, 5202 based on Foata normal form. 14/16469 useless extension candidates. Maximal degree in co-relation 80068. Up to 15547 conditions per place. [2024-06-14 12:30:16,496 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 148 selfloop transitions, 45 changer transitions 0/200 dead transitions. [2024-06-14 12:30:16,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 200 transitions, 1855 flow [2024-06-14 12:30:16,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:30:16,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-14 12:30:16,498 INFO L175 Difference]: Start difference. First operand has 103 places, 162 transitions, 1339 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:30:16,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 200 transitions, 1855 flow [2024-06-14 12:30:16,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 200 transitions, 1754 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 12:30:16,723 INFO L231 Difference]: Finished difference. Result has 107 places, 162 transitions, 1340 flow [2024-06-14 12:30:16,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1340, PETRI_PLACES=107, PETRI_TRANSITIONS=162} [2024-06-14 12:30:16,724 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-14 12:30:16,724 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 162 transitions, 1340 flow [2024-06-14 12:30:16,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:16,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:16,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:16,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:30:16,724 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:16,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash -343263649, now seen corresponding path program 1 times [2024-06-14 12:30:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:16,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371095801] [2024-06-14 12:30:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:16,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:18,137 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 12:30:18,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:18,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371095801] [2024-06-14 12:30:18,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371095801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:18,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:18,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:18,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406063555] [2024-06-14 12:30:18,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:18,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:18,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:18,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:18,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 162 transitions, 1340 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:18,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:18,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:18,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:20,498 INFO L124 PetriNetUnfolderBase]: 11882/16745 cut-off events. [2024-06-14 12:30:20,498 INFO L125 PetriNetUnfolderBase]: For 253301/253314 co-relation queries the response was YES. [2024-06-14 12:30:20,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82847 conditions, 16745 events. 11882/16745 cut-off events. For 253301/253314 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 94011 event pairs, 4772 based on Foata normal form. 44/16733 useless extension candidates. Maximal degree in co-relation 82804. Up to 15061 conditions per place. [2024-06-14 12:30:20,641 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 114 selfloop transitions, 96 changer transitions 0/217 dead transitions. [2024-06-14 12:30:20,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 217 transitions, 1980 flow [2024-06-14 12:30:20,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:20,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 12:30:20,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-14 12:30:20,643 INFO L175 Difference]: Start difference. First operand has 107 places, 162 transitions, 1340 flow. Second operand 8 states and 210 transitions. [2024-06-14 12:30:20,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 217 transitions, 1980 flow [2024-06-14 12:30:20,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 217 transitions, 1878 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:20,893 INFO L231 Difference]: Finished difference. Result has 109 places, 165 transitions, 1497 flow [2024-06-14 12:30:20,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1497, PETRI_PLACES=109, PETRI_TRANSITIONS=165} [2024-06-14 12:30:20,893 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2024-06-14 12:30:20,893 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 165 transitions, 1497 flow [2024-06-14 12:30:20,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:20,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:20,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:20,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:30:20,894 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:20,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1149535328, now seen corresponding path program 1 times [2024-06-14 12:30:20,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:20,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560873271] [2024-06-14 12:30:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:20,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:21,771 INFO 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 12:30:21,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:21,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560873271] [2024-06-14 12:30:21,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560873271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:21,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:21,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:30:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956947709] [2024-06-14 12:30:21,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:21,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:30:21,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:30:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:30:21,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:21,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 165 transitions, 1497 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:21,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:21,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:21,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:23,732 INFO L124 PetriNetUnfolderBase]: 11898/16774 cut-off events. [2024-06-14 12:30:23,732 INFO L125 PetriNetUnfolderBase]: For 276404/276412 co-relation queries the response was YES. [2024-06-14 12:30:23,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86518 conditions, 16774 events. 11898/16774 cut-off events. For 276404/276412 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 94199 event pairs, 5195 based on Foata normal form. 10/16754 useless extension candidates. Maximal degree in co-relation 86474. Up to 16087 conditions per place. [2024-06-14 12:30:23,880 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 171 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2024-06-14 12:30:23,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 195 transitions, 2011 flow [2024-06-14 12:30:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:30:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:30:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 12:30:23,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4506172839506173 [2024-06-14 12:30:23,881 INFO L175 Difference]: Start difference. First operand has 109 places, 165 transitions, 1497 flow. Second operand 6 states and 146 transitions. [2024-06-14 12:30:23,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 195 transitions, 2011 flow [2024-06-14 12:30:24,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 195 transitions, 1800 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:24,110 INFO L231 Difference]: Finished difference. Result has 109 places, 169 transitions, 1386 flow [2024-06-14 12:30:24,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1386, PETRI_PLACES=109, PETRI_TRANSITIONS=169} [2024-06-14 12:30:24,111 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 52 predicate places. [2024-06-14 12:30:24,111 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 169 transitions, 1386 flow [2024-06-14 12:30:24,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:24,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:24,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:24,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:30:24,111 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:24,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:24,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1521948415, now seen corresponding path program 2 times [2024-06-14 12:30:24,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:24,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405160724] [2024-06-14 12:30:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:24,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:25,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:25,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405160724] [2024-06-14 12:30:25,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405160724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:25,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:25,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:25,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359474825] [2024-06-14 12:30:25,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:25,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:25,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:25,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:25,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 169 transitions, 1386 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:25,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:25,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:25,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:27,761 INFO L124 PetriNetUnfolderBase]: 11934/16785 cut-off events. [2024-06-14 12:30:27,761 INFO L125 PetriNetUnfolderBase]: For 302992/303000 co-relation queries the response was YES. [2024-06-14 12:30:27,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89178 conditions, 16785 events. 11934/16785 cut-off events. For 302992/303000 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 93836 event pairs, 4786 based on Foata normal form. 12/16749 useless extension candidates. Maximal degree in co-relation 89133. Up to 15382 conditions per place. [2024-06-14 12:30:27,915 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 112 selfloop transitions, 100 changer transitions 0/219 dead transitions. [2024-06-14 12:30:27,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 219 transitions, 2026 flow [2024-06-14 12:30:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:27,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 12:30:27,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:30:27,916 INFO L175 Difference]: Start difference. First operand has 109 places, 169 transitions, 1386 flow. Second operand 8 states and 204 transitions. [2024-06-14 12:30:27,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 219 transitions, 2026 flow [2024-06-14 12:30:28,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 219 transitions, 1958 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:28,180 INFO L231 Difference]: Finished difference. Result has 113 places, 172 transitions, 1591 flow [2024-06-14 12:30:28,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1591, PETRI_PLACES=113, PETRI_TRANSITIONS=172} [2024-06-14 12:30:28,181 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-06-14 12:30:28,181 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 172 transitions, 1591 flow [2024-06-14 12:30:28,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:28,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:28,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:28,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:30:28,181 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:28,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:28,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1530519295, now seen corresponding path program 3 times [2024-06-14 12:30:28,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:28,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388528254] [2024-06-14 12:30:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:28,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:29,482 INFO 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 12:30:29,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:29,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388528254] [2024-06-14 12:30:29,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388528254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:29,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:29,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:29,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60319603] [2024-06-14 12:30:29,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:29,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:29,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:29,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:29,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:29,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:29,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 172 transitions, 1591 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:29,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:29,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:31,859 INFO L124 PetriNetUnfolderBase]: 11970/16837 cut-off events. [2024-06-14 12:30:31,860 INFO L125 PetriNetUnfolderBase]: For 338924/338932 co-relation queries the response was YES. [2024-06-14 12:30:31,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93295 conditions, 16837 events. 11970/16837 cut-off events. For 338924/338932 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 93991 event pairs, 4438 based on Foata normal form. 12/16801 useless extension candidates. Maximal degree in co-relation 93249. Up to 15037 conditions per place. [2024-06-14 12:30:32,018 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 113 selfloop transitions, 111 changer transitions 0/231 dead transitions. [2024-06-14 12:30:32,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 231 transitions, 2459 flow [2024-06-14 12:30:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 12:30:32,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-14 12:30:32,020 INFO L175 Difference]: Start difference. First operand has 113 places, 172 transitions, 1591 flow. Second operand 8 states and 211 transitions. [2024-06-14 12:30:32,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 231 transitions, 2459 flow [2024-06-14 12:30:32,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 231 transitions, 2214 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 12:30:32,323 INFO L231 Difference]: Finished difference. Result has 115 places, 178 transitions, 1708 flow [2024-06-14 12:30:32,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1708, PETRI_PLACES=115, PETRI_TRANSITIONS=178} [2024-06-14 12:30:32,324 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-06-14 12:30:32,324 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 178 transitions, 1708 flow [2024-06-14 12:30:32,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:32,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:32,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:32,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:30:32,324 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:32,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:32,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1294047265, now seen corresponding path program 4 times [2024-06-14 12:30:32,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:32,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198859811] [2024-06-14 12:30:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:32,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:33,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198859811] [2024-06-14 12:30:33,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198859811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:33,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:33,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:30:33,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972748188] [2024-06-14 12:30:33,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:33,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:30:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:30:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:30:33,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:33,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 178 transitions, 1708 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:33,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:33,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:33,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:35,975 INFO L124 PetriNetUnfolderBase]: 11955/16836 cut-off events. [2024-06-14 12:30:35,976 INFO L125 PetriNetUnfolderBase]: For 376662/376666 co-relation queries the response was YES. [2024-06-14 12:30:36,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95929 conditions, 16836 events. 11955/16836 cut-off events. For 376662/376666 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 94275 event pairs, 4807 based on Foata normal form. 8/16766 useless extension candidates. Maximal degree in co-relation 95882. Up to 15413 conditions per place. [2024-06-14 12:30:36,152 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 120 selfloop transitions, 98 changer transitions 0/225 dead transitions. [2024-06-14 12:30:36,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 225 transitions, 2302 flow [2024-06-14 12:30:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 12:30:36,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47453703703703703 [2024-06-14 12:30:36,154 INFO L175 Difference]: Start difference. First operand has 115 places, 178 transitions, 1708 flow. Second operand 8 states and 205 transitions. [2024-06-14 12:30:36,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 225 transitions, 2302 flow [2024-06-14 12:30:36,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 225 transitions, 2024 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:30:36,538 INFO L231 Difference]: Finished difference. Result has 118 places, 178 transitions, 1637 flow [2024-06-14 12:30:36,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1637, PETRI_PLACES=118, PETRI_TRANSITIONS=178} [2024-06-14 12:30:36,538 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2024-06-14 12:30:36,538 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 178 transitions, 1637 flow [2024-06-14 12:30:36,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:36,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:36,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:36,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:30:36,539 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:36,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:36,539 INFO L85 PathProgramCache]: Analyzing trace with hash -468368942, now seen corresponding path program 2 times [2024-06-14 12:30:36,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:36,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018124424] [2024-06-14 12:30:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:36,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:37,482 INFO 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 12:30:37,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:37,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018124424] [2024-06-14 12:30:37,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018124424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:37,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:37,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:30:37,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933446069] [2024-06-14 12:30:37,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:37,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:30:37,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:30:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:30:37,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:37,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 178 transitions, 1637 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:37,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:37,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:37,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:39,478 INFO L124 PetriNetUnfolderBase]: 11948/16871 cut-off events. [2024-06-14 12:30:39,478 INFO L125 PetriNetUnfolderBase]: For 394629/394651 co-relation queries the response was YES. [2024-06-14 12:30:39,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95989 conditions, 16871 events. 11948/16871 cut-off events. For 394629/394651 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 94832 event pairs, 5183 based on Foata normal form. 18/16829 useless extension candidates. Maximal degree in co-relation 95941. Up to 16143 conditions per place. [2024-06-14 12:30:39,649 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 172 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-14 12:30:39,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 203 transitions, 2165 flow [2024-06-14 12:30:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:30:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:30:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 12:30:39,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2024-06-14 12:30:39,650 INFO L175 Difference]: Start difference. First operand has 118 places, 178 transitions, 1637 flow. Second operand 6 states and 142 transitions. [2024-06-14 12:30:39,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 203 transitions, 2165 flow [2024-06-14 12:30:40,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 203 transitions, 1923 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 12:30:40,075 INFO L231 Difference]: Finished difference. Result has 117 places, 182 transitions, 1522 flow [2024-06-14 12:30:40,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1522, PETRI_PLACES=117, PETRI_TRANSITIONS=182} [2024-06-14 12:30:40,076 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2024-06-14 12:30:40,076 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 182 transitions, 1522 flow [2024-06-14 12:30:40,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:40,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:40,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:40,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:30:40,077 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:40,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash -474076910, now seen corresponding path program 1 times [2024-06-14 12:30:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:40,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840104041] [2024-06-14 12:30:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:41,023 INFO 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 12:30:41,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:41,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840104041] [2024-06-14 12:30:41,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840104041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:41,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:41,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:30:41,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042503880] [2024-06-14 12:30:41,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:41,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:30:41,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:30:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:30:41,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:30:41,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 182 transitions, 1522 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:41,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:41,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:30:41,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:42,870 INFO L124 PetriNetUnfolderBase]: 10569/15408 cut-off events. [2024-06-14 12:30:42,870 INFO L125 PetriNetUnfolderBase]: For 370218/370220 co-relation queries the response was YES. [2024-06-14 12:30:42,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88315 conditions, 15408 events. 10569/15408 cut-off events. For 370218/370220 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 90688 event pairs, 4503 based on Foata normal form. 2/15337 useless extension candidates. Maximal degree in co-relation 88266. Up to 14356 conditions per place. [2024-06-14 12:30:43,026 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 185 selfloop transitions, 14 changer transitions 0/207 dead transitions. [2024-06-14 12:30:43,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 207 transitions, 2044 flow [2024-06-14 12:30:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:30:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:30:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 12:30:43,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-14 12:30:43,027 INFO L175 Difference]: Start difference. First operand has 117 places, 182 transitions, 1522 flow. Second operand 6 states and 148 transitions. [2024-06-14 12:30:43,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 207 transitions, 2044 flow [2024-06-14 12:30:43,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 207 transitions, 1947 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:43,370 INFO L231 Difference]: Finished difference. Result has 119 places, 186 transitions, 1528 flow [2024-06-14 12:30:43,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1528, PETRI_PLACES=119, PETRI_TRANSITIONS=186} [2024-06-14 12:30:43,370 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-14 12:30:43,370 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 186 transitions, 1528 flow [2024-06-14 12:30:43,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:43,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:43,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:30:43,371 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:43,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:43,371 INFO L85 PathProgramCache]: Analyzing trace with hash -468362990, now seen corresponding path program 2 times [2024-06-14 12:30:43,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:43,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202229103] [2024-06-14 12:30:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:43,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:44,327 INFO 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 12:30:44,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:44,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202229103] [2024-06-14 12:30:44,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202229103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:44,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:44,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:30:44,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560983829] [2024-06-14 12:30:44,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:44,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:30:44,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:30:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:30:44,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:30:44,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 186 transitions, 1528 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:44,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:44,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:30:44,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:46,199 INFO L124 PetriNetUnfolderBase]: 10562/15421 cut-off events. [2024-06-14 12:30:46,199 INFO L125 PetriNetUnfolderBase]: For 398420/398427 co-relation queries the response was YES. [2024-06-14 12:30:46,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91265 conditions, 15421 events. 10562/15421 cut-off events. For 398420/398427 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 90858 event pairs, 4498 based on Foata normal form. 6/15363 useless extension candidates. Maximal degree in co-relation 91215. Up to 14329 conditions per place. [2024-06-14 12:30:46,352 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 179 selfloop transitions, 21 changer transitions 0/208 dead transitions. [2024-06-14 12:30:46,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 208 transitions, 2050 flow [2024-06-14 12:30:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:30:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:30:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 12:30:46,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-06-14 12:30:46,353 INFO L175 Difference]: Start difference. First operand has 119 places, 186 transitions, 1528 flow. Second operand 6 states and 147 transitions. [2024-06-14 12:30:46,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 208 transitions, 2050 flow [2024-06-14 12:30:46,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 208 transitions, 1977 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:46,671 INFO L231 Difference]: Finished difference. Result has 121 places, 190 transitions, 1580 flow [2024-06-14 12:30:46,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1580, PETRI_PLACES=121, PETRI_TRANSITIONS=190} [2024-06-14 12:30:46,672 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-14 12:30:46,672 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 190 transitions, 1580 flow [2024-06-14 12:30:46,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:46,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:46,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:30:46,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:30:46,672 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:46,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:46,673 INFO L85 PathProgramCache]: Analyzing trace with hash -468355054, now seen corresponding path program 1 times [2024-06-14 12:30:46,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:46,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616942535] [2024-06-14 12:30:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:46,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:47,844 INFO 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 12:30:47,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:47,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616942535] [2024-06-14 12:30:47,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616942535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:47,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:47,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:30:47,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151777268] [2024-06-14 12:30:47,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:47,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:30:47,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:47,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:30:47,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:30:47,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:47,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 190 transitions, 1580 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:47,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:47,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:47,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:50,098 INFO L124 PetriNetUnfolderBase]: 12574/18059 cut-off events. [2024-06-14 12:30:50,098 INFO L125 PetriNetUnfolderBase]: For 510989/510991 co-relation queries the response was YES. [2024-06-14 12:30:50,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109832 conditions, 18059 events. 12574/18059 cut-off events. For 510989/510991 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 104995 event pairs, 5487 based on Foata normal form. 2/17988 useless extension candidates. Maximal degree in co-relation 109781. Up to 17018 conditions per place. [2024-06-14 12:30:50,291 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 195 selfloop transitions, 18 changer transitions 0/220 dead transitions. [2024-06-14 12:30:50,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 220 transitions, 2165 flow [2024-06-14 12:30:50,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:30:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:30:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 12:30:50,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:30:50,292 INFO L175 Difference]: Start difference. First operand has 121 places, 190 transitions, 1580 flow. Second operand 7 states and 160 transitions. [2024-06-14 12:30:50,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 220 transitions, 2165 flow [2024-06-14 12:30:50,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 220 transitions, 2065 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:50,739 INFO L231 Difference]: Finished difference. Result has 125 places, 198 transitions, 1631 flow [2024-06-14 12:30:50,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1631, PETRI_PLACES=125, PETRI_TRANSITIONS=198} [2024-06-14 12:30:50,739 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2024-06-14 12:30:50,739 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 198 transitions, 1631 flow [2024-06-14 12:30:50,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:50,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:50,740 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 12:30:50,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:30:50,740 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:50,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1656152929, now seen corresponding path program 1 times [2024-06-14 12:30:50,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:50,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615451905] [2024-06-14 12:30:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:30:51,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:51,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615451905] [2024-06-14 12:30:51,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615451905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:51,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:51,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:51,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456396486] [2024-06-14 12:30:51,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:51,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:51,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:51,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:51,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:51,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:51,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 198 transitions, 1631 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:51,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:51,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:51,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:54,642 INFO L124 PetriNetUnfolderBase]: 13819/19366 cut-off events. [2024-06-14 12:30:54,643 INFO L125 PetriNetUnfolderBase]: For 639105/639112 co-relation queries the response was YES. [2024-06-14 12:30:54,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126212 conditions, 19366 events. 13819/19366 cut-off events. For 639105/639112 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 109891 event pairs, 4345 based on Foata normal form. 26/19267 useless extension candidates. Maximal degree in co-relation 126159. Up to 16812 conditions per place. [2024-06-14 12:30:54,854 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 148 selfloop transitions, 101 changer transitions 0/257 dead transitions. [2024-06-14 12:30:54,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 257 transitions, 2567 flow [2024-06-14 12:30:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 12:30:54,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-14 12:30:54,855 INFO L175 Difference]: Start difference. First operand has 125 places, 198 transitions, 1631 flow. Second operand 8 states and 214 transitions. [2024-06-14 12:30:54,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 257 transitions, 2567 flow [2024-06-14 12:30:55,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 257 transitions, 2478 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:30:55,281 INFO L231 Difference]: Finished difference. Result has 129 places, 202 transitions, 1877 flow [2024-06-14 12:30:55,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1877, PETRI_PLACES=129, PETRI_TRANSITIONS=202} [2024-06-14 12:30:55,282 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 72 predicate places. [2024-06-14 12:30:55,282 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 202 transitions, 1877 flow [2024-06-14 12:30:55,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:55,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:30:55,282 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 12:30:55,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:30:55,283 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:30:55,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:30:55,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1336022361, now seen corresponding path program 2 times [2024-06-14 12:30:55,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:30:55,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035110811] [2024-06-14 12:30:55,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:30:55,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:30:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:30:56,295 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 12:30:56,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:30:56,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035110811] [2024-06-14 12:30:56,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035110811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:30:56,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:30:56,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:30:56,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337915487] [2024-06-14 12:30:56,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:30:56,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:30:56,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:30:56,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:30:56,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:30:56,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:30:56,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 202 transitions, 1877 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:30:56,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:30:56,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:30:56,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:30:59,338 INFO L124 PetriNetUnfolderBase]: 13743/19297 cut-off events. [2024-06-14 12:30:59,338 INFO L125 PetriNetUnfolderBase]: For 668074/668081 co-relation queries the response was YES. [2024-06-14 12:30:59,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129025 conditions, 19297 events. 13743/19297 cut-off events. For 668074/668081 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 109766 event pairs, 5459 based on Foata normal form. 26/19264 useless extension candidates. Maximal degree in co-relation 128971. Up to 17404 conditions per place. [2024-06-14 12:30:59,573 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 151 selfloop transitions, 99 changer transitions 0/258 dead transitions. [2024-06-14 12:30:59,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 258 transitions, 2615 flow [2024-06-14 12:30:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:30:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:30:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:30:59,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2024-06-14 12:30:59,574 INFO L175 Difference]: Start difference. First operand has 129 places, 202 transitions, 1877 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:30:59,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 258 transitions, 2615 flow [2024-06-14 12:31:00,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 258 transitions, 2476 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:00,839 INFO L231 Difference]: Finished difference. Result has 133 places, 204 transitions, 2013 flow [2024-06-14 12:31:00,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2013, PETRI_PLACES=133, PETRI_TRANSITIONS=204} [2024-06-14 12:31:00,839 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-06-14 12:31:00,839 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 204 transitions, 2013 flow [2024-06-14 12:31:00,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:00,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:00,840 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 12:31:00,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:31:00,840 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:31:00,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1989094972, now seen corresponding path program 1 times [2024-06-14 12:31:00,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:00,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789796442] [2024-06-14 12:31:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:00,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:01,876 INFO 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 12:31:01,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:01,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789796442] [2024-06-14 12:31:01,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789796442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:01,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:01,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:31:01,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599214779] [2024-06-14 12:31:01,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:01,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:31:01,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:01,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:31:01,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:31:01,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:31:01,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 204 transitions, 2013 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:01,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:01,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:31:01,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:04,909 INFO L124 PetriNetUnfolderBase]: 13775/19351 cut-off events. [2024-06-14 12:31:04,909 INFO L125 PetriNetUnfolderBase]: For 701483/701510 co-relation queries the response was YES. [2024-06-14 12:31:04,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131163 conditions, 19351 events. 13775/19351 cut-off events. For 701483/701510 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 110432 event pairs, 5850 based on Foata normal form. 30/19325 useless extension candidates. Maximal degree in co-relation 131107. Up to 18440 conditions per place. [2024-06-14 12:31:05,076 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 191 selfloop transitions, 47 changer transitions 0/246 dead transitions. [2024-06-14 12:31:05,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 246 transitions, 2705 flow [2024-06-14 12:31:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:31:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:31:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:31:05,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-14 12:31:05,077 INFO L175 Difference]: Start difference. First operand has 133 places, 204 transitions, 2013 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:31:05,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 246 transitions, 2705 flow [2024-06-14 12:31:05,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 246 transitions, 2462 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:05,546 INFO L231 Difference]: Finished difference. Result has 134 places, 209 transitions, 1971 flow [2024-06-14 12:31:05,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1971, PETRI_PLACES=134, PETRI_TRANSITIONS=209} [2024-06-14 12:31:05,547 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 77 predicate places. [2024-06-14 12:31:05,547 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 209 transitions, 1971 flow [2024-06-14 12:31:05,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:05,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:05,547 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 12:31:05,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:31:05,547 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:31:05,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash -2045419767, now seen corresponding path program 3 times [2024-06-14 12:31:05,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:05,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621658108] [2024-06-14 12:31:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:05,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:06,630 INFO 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 12:31:06,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:06,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621658108] [2024-06-14 12:31:06,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621658108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:06,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:06,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134134902] [2024-06-14 12:31:06,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:06,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:06,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:31:06,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 209 transitions, 1971 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:06,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:06,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:31:06,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:10,126 INFO L124 PetriNetUnfolderBase]: 14034/19776 cut-off events. [2024-06-14 12:31:10,126 INFO L125 PetriNetUnfolderBase]: For 771175/771198 co-relation queries the response was YES. [2024-06-14 12:31:10,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138227 conditions, 19776 events. 14034/19776 cut-off events. For 771175/771198 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 113475 event pairs, 4769 based on Foata normal form. 44/19764 useless extension candidates. Maximal degree in co-relation 138170. Up to 17693 conditions per place. [2024-06-14 12:31:10,312 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 164 selfloop transitions, 101 changer transitions 0/273 dead transitions. [2024-06-14 12:31:10,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 273 transitions, 2997 flow [2024-06-14 12:31:10,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-14 12:31:10,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-14 12:31:10,317 INFO L175 Difference]: Start difference. First operand has 134 places, 209 transitions, 1971 flow. Second operand 8 states and 219 transitions. [2024-06-14 12:31:10,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 273 transitions, 2997 flow [2024-06-14 12:31:10,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 273 transitions, 2834 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 12:31:10,877 INFO L231 Difference]: Finished difference. Result has 137 places, 213 transitions, 2159 flow [2024-06-14 12:31:10,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2159, PETRI_PLACES=137, PETRI_TRANSITIONS=213} [2024-06-14 12:31:10,877 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-06-14 12:31:10,877 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 213 transitions, 2159 flow [2024-06-14 12:31:10,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:10,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:10,878 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 12:31:10,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:31:10,878 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:31:10,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:10,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2051453137, now seen corresponding path program 4 times [2024-06-14 12:31:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:10,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872249133] [2024-06-14 12:31:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:10,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:12,056 INFO 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 12:31:12,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:12,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872249133] [2024-06-14 12:31:12,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872249133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:12,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:12,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:12,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508084700] [2024-06-14 12:31:12,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:12,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:12,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:12,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:12,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:31:12,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 213 transitions, 2159 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:12,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:12,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:31:12,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:15,455 INFO L124 PetriNetUnfolderBase]: 14198/19996 cut-off events. [2024-06-14 12:31:15,455 INFO L125 PetriNetUnfolderBase]: For 825336/825355 co-relation queries the response was YES. [2024-06-14 12:31:15,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141913 conditions, 19996 events. 14198/19996 cut-off events. For 825336/825355 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 114928 event pairs, 5537 based on Foata normal form. 44/19984 useless extension candidates. Maximal degree in co-relation 141855. Up to 18337 conditions per place. [2024-06-14 12:31:15,645 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 168 selfloop transitions, 92 changer transitions 0/268 dead transitions. [2024-06-14 12:31:15,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 268 transitions, 2929 flow [2024-06-14 12:31:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 12:31:15,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837962962962963 [2024-06-14 12:31:15,646 INFO L175 Difference]: Start difference. First operand has 137 places, 213 transitions, 2159 flow. Second operand 8 states and 209 transitions. [2024-06-14 12:31:15,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 268 transitions, 2929 flow [2024-06-14 12:31:16,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 268 transitions, 2762 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:31:16,185 INFO L231 Difference]: Finished difference. Result has 141 places, 215 transitions, 2264 flow [2024-06-14 12:31:16,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2264, PETRI_PLACES=141, PETRI_TRANSITIONS=215} [2024-06-14 12:31:16,185 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-06-14 12:31:16,185 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 215 transitions, 2264 flow [2024-06-14 12:31:16,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:16,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:16,186 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 12:31:16,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:31:16,186 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:31:16,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:16,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2056815517, now seen corresponding path program 5 times [2024-06-14 12:31:16,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:16,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845480008] [2024-06-14 12:31:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:16,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:17,317 INFO 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 12:31:17,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:17,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845480008] [2024-06-14 12:31:17,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845480008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:17,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:17,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:31:17,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517643512] [2024-06-14 12:31:17,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:17,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:31:17,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:31:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:31:17,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:31:17,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 215 transitions, 2264 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:17,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:17,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:31:17,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:31:21,116 INFO L124 PetriNetUnfolderBase]: 14362/20264 cut-off events. [2024-06-14 12:31:21,116 INFO L125 PetriNetUnfolderBase]: For 869241/869264 co-relation queries the response was YES. [2024-06-14 12:31:21,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145061 conditions, 20264 events. 14362/20264 cut-off events. For 869241/869264 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 116924 event pairs, 5581 based on Foata normal form. 50/20258 useless extension candidates. Maximal degree in co-relation 145001. Up to 18581 conditions per place. [2024-06-14 12:31:21,301 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 169 selfloop transitions, 96 changer transitions 0/273 dead transitions. [2024-06-14 12:31:21,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 273 transitions, 3056 flow [2024-06-14 12:31:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:31:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:31:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:31:21,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2024-06-14 12:31:21,303 INFO L175 Difference]: Start difference. First operand has 141 places, 215 transitions, 2264 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:31:21,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 273 transitions, 3056 flow [2024-06-14 12:31:22,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 273 transitions, 2834 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:31:22,068 INFO L231 Difference]: Finished difference. Result has 143 places, 217 transitions, 2322 flow [2024-06-14 12:31:22,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2322, PETRI_PLACES=143, PETRI_TRANSITIONS=217} [2024-06-14 12:31:22,068 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2024-06-14 12:31:22,069 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 217 transitions, 2322 flow [2024-06-14 12:31:22,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:22,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:31:22,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:31:22,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:31:22,069 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:31:22,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:31:22,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2039694315, now seen corresponding path program 1 times [2024-06-14 12:31:22,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:31:22,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107910067] [2024-06-14 12:31:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:31:22,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:31:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:31:23,532 INFO 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 12:31:23,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:31:23,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107910067] [2024-06-14 12:31:23,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107910067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:31:23,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:31:23,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:31:23,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688802895] [2024-06-14 12:31:23,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:31:23,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:31:23,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:31:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:31:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:31:23,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:31:23,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 217 transitions, 2322 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:31:23,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:31:23,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:31:23,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand